Professor Dariush Mirshekar-Syahkal
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Email
dariush@essex.ac.uk -
Telephone
+44 (0) 1206 872406
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Location
1NW.3.18, Colchester Campus
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Academic support hours
3-4 pm Tuesdays & 3-4 pm Fridays
Profile
Biography
Professor Dariush Mirshekar FIET, FHEA and FIEEE, Head of RF & Microwave Research Lab, has several seminal works in modelling, design, fabrication and measurement of microwave and mm-wave circuits and antennas. He has been collaborating with the UK and international communication companies in various capacities. He generalised the spectral domain technique for analysis and design of Microwave and Mm-wave Integrated Circuits (MICs and MMICs). In the field of electromagnetic material characterisation, he has developed a novel noise cancellation technique and a 1D probe array used in quantitative inspection of sensitive metallic components and structures in aircrafts, off-shore platforms and power plants. His research projects on RF filters for cellular communications has led to the development of compact multi-mode dielectric loaded filters for European commercial satellite communications. He has worked on mm-wave radio-fibre systems for wideband wireless distribution of communication feeds to homes and offices. In this connection, he has developed high gain microstrip antenna arrays, broadband mm-wave tapered slot antennas, and UWB bow-tie antennas on Silicon. Also, he has developed an intelligent antenna, “Superloop Antenna”, for boosting weak TV signals for commercial applications. He has invented compact thin-substrate beam adaptive planar spiral antenna free from phase shifters leading to further development of phase-shifter free switched-beam planar antennas in his group for communication capacity boast. His further research has been on the development of LC (liquid crystal) based RF devices, modelling and characterisation of nematic LCs, and development of steerable LC antennas all at mm-wave frequencies. His further key contributions are in the field of super compact filters for UWB technology, amplifier linearization, and numerical modelling in electromagnetics. His current research embodies microwave and mm-wave full-duplex radio system and NFC (near field communication) at mm-waves for 5G and beyond. He holds five patents, has numerous publications including a book (Spectral Domain Method for Microwave Integrated Circuits), two book chapters (entitled Advances in Crack Length Measurement with ACFM Technique, and Loop Antennas) and papers in IEEE Transactions, IET Proceedings and in the very prestigious Proceedings of the Royal Society. RF & Microwave Research Laboratory (See also: staff research interests by category)
Research and professional activities
Research interests
Microwave components including antennas, filters and amplifiers
numeric techniques in electromagnetic field problems
nondestructive evaluation of materials by electromagnetic techniques
Teaching and supervision
Current teaching responsibilities
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Engineering Electromagnetics (CE266)
Current supervision
Previous supervision
Degree subject: Electronic Systems Engineering
Degree type: Doctor of Philosophy
Awarded date: 25/9/2012
Degree subject: Computing and Electronic Systems
Degree type: Master of Science (by Dissertation)
Awarded date: 27/5/2011
Publications
Journal articles (92)
Litov, N., Falkner, B., Zhou, H., Mehta, A., Gondwe, W., Thalakotuna, D., Mirshekar-Syahkal, D., Eselle, K. and Nakano, H., (2022). Radar Cross Section Analysis of Two Wind Turbines via a Novel Millimeter- Wave Technique and Scale Model Measurements. IEEE Access. 10, 17897-17907
Bulja, S., Kopf, R., Tate, A., Cappuzzo, M., Kozlov, D., Claussen, H., Wiegner, D., Templ, W. and Mirshekar-Syahkal, D., (2022). High frequency resistive switching behavior of amorphous TiO₂ and NiO.. Scientific Reports. 12 (1), 13804-
Falkner, BJ., Zhou, H., Zhang, W., Metaxas, G., Mehta, A., Ziegler, V., Multerer, T., Mirshekar-Syahkal, D. and Nakano, H., (2022). A low-profile wideband compressed single-arm spiral antenna array for mid-band 5G beam steering applications.. Scientific Reports. 12 (1), 13790-
Falkner, BJ., Zhou, H., Mehta, A., Arampatzis, T., Mirshekar-Syahkal, D. and Nakano, H., (2021). A Circularly Polarized Low-Cost Flat Panel Antenna Array with a High Impedance Surface Meta-Substrate for Satellite On-The-Move Medical IoT Applications. IEEE Transactions on Antennas and Propagation. 69 (9), 6076-6081
Mirshekar-Syahkal, D., Deo, P. and Mehta, A., (2020). Full-duplex Radio with Two Receivers for Self-Interference Cancellation. IET Microwaves, Antennas and Propagation. 14 (9), 897-902
Pal, A., Mehta, A., Skippins, A., Spicer, P. and Mirshekar-Syahkal, D., (2020). Novel Interference Suppression Null Steering Antenna System for High Precision Positioning. IEEE Access. 8, 77779-77787
Pal, A., Mehta, A., Goonesinghe, H., Mirshekar-Syahkal, D. and Nakano, H., (2018). Conformal Beam-Steering Antenna Controlled by a Raspberry Pi for Sustained High-Throughput Applications. IEEE Transactions on Antennas and Propagation. 66 (2), 918-926
Zhang, W., Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2018). Low profile pattern-switchable multibeam antenna consisting of four L-shaped microstrip lines. IET Microwaves, Antennas and Propagation. 12 (11), 1846-1851
Zhou, H., Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2018). A Four-Arm circularly polarized high-gain high-tilt beam curl antenna for beam steering applications. IEEE Antennas and Wireless Propagation Letters. 17 (6), 1034-1038
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2017). 2 x 2 Phased Array Consisting of Square Loop Antennas for High Gain Wide Angle Scanning With Low Grating Lobes. IEEE Transactions on Antennas and Propagation. 65 (2), 576-583
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2017). A Twelve-Beam Steering Low Profile Patch Antenna with Shorting Vias for Vehicular Applications. IEEE Transactions on Antennas and Propagation. 65 (8), 3905-3912
Fernández, FA., Seddon, L., James, R., Day, SE., Bulja, S., Deo, P. and Mirshekar-Syahkal, D., (2015). Accurate Modelling of Liquid Crystal-Based Microwave Devices. Molecular Crystals and Liquid Crystals. 619 (1), 19-27
Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernandez, FA., (2015). Microstrip Device for Broadband (15–65 GHz) Measurement of Dielectric Properties of Nematic Liquid Crystals. IEEE Transactions on Microwave Theory and Techniques. 63 (4), 1388-1398
Pal, A., Mehta, A., Mirshekar-Syahkal, D., Deo, P. and Nakano, H., (2014). Dual-Band Low-Profile Capacitively Coupled Beam-Steerable Square-Loop Antenna. IEEE Transactions on Antennas and Propagation. 62 (3), 1204-1211
Bulja, S., Mirshekar‐Syahkal, D., James, R., Day, SE. and Fernández, FA., (2013). Effective dielectric constant of top grounded coplanar waveguide on liquid crystal superstrate. Microwave and Optical Technology Letters. 55 (6), 1416-1418
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2012). Low-Profile Steerable Loop Antenna With Capacitively Coupled Feeds. IEEE Antennas and Wireless Propagation Letters. 11, 873-876
James, R., Fernández, FA., Day, SE., Bulja, S. and Mirshekar-Syahkal, D., (2011). Characterisation and Applications of Nematic Liquid Crystals in Microwave Devices. Molecular Crystals and Liquid Crystals. 542 (1), 196/[718]-203/[725]
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2011). A Square-Loop Antenna With 4-Port Feeding Network Generating Semi-Doughnut Pattern for Vehicular and Wireless Applications. IEEE Antennas and Wireless Propagation Letters. 10, 338-341
Deo, P., Pant, M., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2011). Implementation and simulation of commercial RF switch integration with steerable square loop antenna. Electronics Letters. 47 (12), 686-687
Deo, P., Mehta, A., Mirshekar‐Syahkal, D., Massey, PJ. and Nakano, H., (2011). High‐impedance surface‐based square loop antenna with RF‐absorber. Microwave and Optical Technology Letters. 53 (3), 481-485
Bulja, S. and Mirshekar‐Syahkal, D., (2010). Analysis and design of a new reflection‐type 360° phase shifter with combined switch and varactor. Microwave and Optical Technology Letters. 52 (3), 530-535
Bulja, S. and Mirshekar-Syahkal, D., (2010). Meander line millimetre-wave liquid crystal based phase shifter. Electronics Letters. 46 (11), 769-771
Bulja, S. and Mirshekar-Syahkal, D., (2010). Novel Wideband Transition Between Coplanar Waveguide and Microstrip Line. IEEE Transactions on Microwave Theory and Techniques. 58 (7), 1851-1857
Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2010). Thickness Reduction and Performance Enhancement of Steerable Square Loop Antenna Using Hybrid High Impedance Surface. IEEE Transactions on Antennas and Propagation. 58 (5), 1477-1485
Yazdanpanahi, M., Bulja, S., Mirshekar-Syahkal, D., James, R., Day, SE. and Fernandez, FA., (2010). Measurement of Dielectric Constants of Nematic Liquid Crystals at mm-Wave Frequencies Using Patch Resonator. IEEE Transactions on Instrumentation and Measurement. 59 (12), 3079-3085
Bulja, S. and Mirshekar-Syahkal, D., (2009). Combined Low Frequency and Third Harmonic Injection in Power Amplifier Linearization. IEEE Microwave and Wireless Components Letters. 19 (9), 584-586
James, R., Fernandez, FA., Day, SE., Bulja, S. and Mirshekar-Syahkal, D., (2009). Accurate Modeling for Wideband Characterization of Nematic Liquid Crystals for Microwave Applications. IEEE Transactions on Microwave Theory and Techniques. 57 (12), 3293-3297
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Massey, PJ., (2009). Doughnut and Tilted Beam Generation Using a Single Printed Star Antenna. IEEE Transactions on Antennas and Propagation. 57 (10), 3413-3418
Deo, P., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2009). An HIS-Based Spiral Antenna for Pattern Reconfigurable Applications. IEEE Antennas and Wireless Propagation Letters. 8, 196-199
Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2009). Beam steerable square loop antenna over hybrid high impedance surface. Electronics Letters. 45 (19), 962-964
Raaza, A., Mehta, A., Mirshekar-Syahkal, D. and Massey, PJ., (2008). A Double Square Loop Antenna with 45° Step Beam Steering. Journal of Electromagnetic Waves and Applications. 22 (17-18), 2269-2276
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Massey, PJ., (2008). Short-circuited feed terminations on beam steering square loop antennas. Electronics Letters. 44 (24), 1389-1390
Mehta, A., Mirshekar‐Syahkal, D. and Nakano, H., (2008). A star patch antenna for generating multiple radiation patterns. Microwave and Optical Technology Letters. 50 (7), 1908-1910
Eltiti, S., Wallace, D., Ridgewell, A., Zougkou, K., Russo, R., Sepulveda, F., Mirshekar-Syahkal, D., Rasor, P., Deeble, R. and Fox, E., (2007). Does Short-Term Exposure to Mobile Phone Base Station Signals Increase Symptoms in Individuals Who Report Sensitivity to Electromagnetic Fields? A Double-Blind Randomized Provocation Study. Environmental Health Perspectives. 115 (11), 1603-1608
Mehta, A., Mirshekar‐Syahkal, D. and Nakano, H., (2007). Pattern reconfigurable spiral antenna and its current distribution. Microwave and Optical Technology Letters. 49 (10), 2567-2570
Mehta, A. and Mirshekar-Syahkal, D., (2007). Pattern steerable square loop antenna. Electronics Letters. 43 (9), 491-493
Russo, R., Fox, E., Cinel, C., Boldini, A., Defeyter, MA., Mirshekar-Syahkal, D. and Mehta, A., (2006). Does acute exposure to mobile phones affect human attention?. Bioelectromagnetics. 27 (3), 215-220
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2006). Beam adaptive single arm rectangular spiral antenna with switches. IEE Proceedings - Microwaves, Antennas and Propagation. 153 (1), 13-13
Peng Wang, Lye Heng Chua and Mirshekar-Syahkal, D., (2005). Accurate characterization of low-Q microwave resonator using critical-points method. IEEE Transactions on Microwave Theory and Techniques. 53 (1), 349-353
Chua, LH. and Mirshekar-Syahkal, D., (2004). Analysis of dielectric loaded cubical cavity for triple-mode filter design. IEE Proceedings - Microwaves, Antennas and Propagation. 151 (1), 61-61
Akhavan, HG. and Mirshekar‐Syahkal, D., (2004). Effects of upper‐patch displacement on the operation of dual‐band stacked microstrip patch antennas. Microwave and Optical Technology Letters. 42 (5), 351-353
Lye Heng Chua and Mirshekar-Syahkal, D., (2003). Accurate and direct characterization of high-Q microwave resonators using one-port measurement. IEEE Transactions on Microwave Theory and Techniques. 51 (3), 978-985
Mirshekar-Syahkal, D. and Mostafavi, RF., (2002). 1-D probe array for ACFM inspection of large metal plates. IEEE Transactions on Instrumentation and Measurement. 51 (2), 374-382
Chuma, JM. and Mirshekar-Syahkal, D., (2002). Effects of walls on coupling between coupled combline resonators. IEE Proceedings - Microwaves, Antennas and Propagation. 149 (1), 53-56
Mohammad-Taheri, M., Safavi-Naieni, S. and Mirshekar-Syahkal, D., (2002). Sixth-order elliptic function filter using triple-mode dielectric-loaded cylindrical cavities. IEE Proceedings - Microwaves, Antennas and Propagation. 149 (5), 237-242
Mirshekar-Syahkal, D. and Mostafavi, RF., (2001). Effects of probe and inducer on saturation of crack signal in high-sensitivity AC field measurement technique. IEE Proceedings - Science, Measurement and Technology. 148 (4), 193-196
Chuma, JM. and Mirshekar-Syahkal, D., (2001). Frequency transformation for realizing longitudinal pseudoelliptic bandpass filters. Microwave and Optical Technology Letters. 28 (3), 153-155
Chuma, JM. and Mirshekar-Syahkal, D., (2001). Frequency transformation for realizing longitudinal pseudoelliptic bandpass filters. Microwave and Optical Technology Letters. 28 (3), 153-155
Mostafavi, RF. and Mirshekar-Syahkal, D., (1999). AC fields around short cracks in metals induced by rectangular coils. IEEE Transactions on Magnetics. 35 (3), 2001-2006
Chuma, J., Sim, CW. and Mirshekar-Syahkal, D., (1999). Computation of resonant frequencies of dielectricloaded rectangularcavity using TLM method. Electronics Letters. 35 (20), 1712-1713
Chuma, JM., Mirshekar-Syahkal, D., Abbas, F., Normington, P. and Zadeh, M., (1999). Six-order elliptic combline filter with electric probe. Microwave and Optical Technology Letters. 20 (5), 290-292
Mostafavi, RF. and Mirshekar-Syahkal, D., (1999). AC fields around short cracks in metals induced by rectangular coils. IEEE Transactions on Magnetics. 35 (3 PART 2), 2001-2006
Mirshekar-Syahkal, D. and Mostafavi, RF., (1997). Analysis technique for interaction of high-frequency rhombic inducer field with cracks in metals. IEEE Transactions on Magnetics. 33 (3), 2291-2298
Mostafavi, RF. and Mirshekar-Syahkal, D., (1997). Simple electromagnetic detection of variations in properties of metal surfaces. IEEE Transactions on Magnetics. 33 (4), 2492-2494
Wang, HY., Mirshekar-Syahkal, D. and Dilworth, IJ., (1997). Spectral domain analysis of coplanar strip discontinuities. Microwave and Optical Technology Letters. 15 (6), 395-398
AKHAVAN, HG., MIRSHEKAR-SYAHKAL, D. and HASSAN, HR., (1997). THEORETICAL MODELLING FOR MICROWAVENDE OF DIELECTRIC MATERIALS USING PLANAR RESONATORS. Nondestructive Testing and Evaluation. 13 (4), 187-201
Mirshekar-Syahkal, D., (1996). Computation of equivalent circuits of CPW discontinuities using quasi-static spectral domain method. IEEE Transactions on Microwave Theory and Techniques. 44 (6), 979-984
Akhavan, HG. and Mirshekar-Syahkal, D., (1996). Analysis of broadband microstrip-slotline transitionswith multi-arm stubs. Electronics Letters. 32 (23), 2106-2108
Hassani, HR., (1995). Study of electromagnetically coupled stacked rectangular patch antennas. IEE Proceedings - Microwaves, Antennas and Propagation. 142 (1), 7-7
Mirshekar-Syahkal, D. and Wake, D., (1995). Bow-tie antennas on high dielectric substrates forMMIC andOEIC applications at millimetre-wave frequencies. Electronics Letters. 31 (24), 2060-2061
Ofosu, WK. and Mirshekar-Syahkal, D., (1995). Radiation pattern of short constant-widthslot antenna. Electronics Letters. 31 (1), 7-8
Huang, Y., Mirshekar-Syahkal, D. and Dilworth, IJ., (1995). Calculation of antenna input impedance by TLM method. Electronics Letters. 31 (25), 2138-2139
Mirshekar-Syahkal, D., Newson, DJ., Wake, D. and Henning, ID., (1994). Wide-band transitions for applications in MMIC's and OEIC's. IEEE Microwave and Guided Wave Letters. 4 (9), 299-300
Akhavan, HG. and Mirshekar-Syahkal, D., (1994). Approximate model for microstrip fed slotantennas. Electronics Letters. 30 (23), 1902-1903
Mirshekar-Syahkal, D. and Sadeghi, SHH., (1994). Surface magnetic field measurement technique fornondestructive testing of metals. Electronics Letters. 30 (3), 210-211
Hassani, HR. and Mirshekar-Syahkal, D., (1994). Analysis of stacked rectangular patch antennas with nonaligned patches or unequal patch sizes. IEEE Transactions on Antennas and Propagation. 42 (9), 1333-1336
Mirshekar-Syahkal, D., (1994). High-frequency characterization of dielectrics using open resonators. Proceedings of SPIE - The International Society for Optical Engineering. 2275, 46-55
Mirshekar-Syahkal, D. and Pote, A., (1993). Characteristics of a coplanar waveguide HEMT mount on GaAs substrate. IEEE Transactions on Microwave Theory and Techniques. 41 (9), 1494-1498
Hassani, HR. and Mirshekar-syahkal, D., (1992). Analysis of triangular patch antennas including radome effects. IEE Proceedings H Microwaves, Antennas and Propagation. 139 (3), 251-251
Sadeghi, SHH. and Mirshekar-Syahkal, D., (1992). Scattering of an induced surface electromagnetic field by fatigue cracks in ferromagnetic metals. IEEE Transactions on Magnetics. 28 (2), 1008-1016
Sadeghi, SHH. and Mirshekar-Syahkal, D., (1991). Surface potential distributions due to eddy currents around long cracks in metals, induced by U-shaped current-carrying wires. IEEE Transactions on Magnetics. 27 (1), 674-679
Mohammad-taheri, M. and Mirshekar-syahkal, D., (1990). Computation of Q-factors off dielectric-loaded cylindrical cavity resonators. IEE Proceedings H Microwaves, Antennas and Propagation. 137 (6), 372-372
Taheri, MM. and Mirshekar-Syahkal, D., (1989). Accurate determination of modes in dielectric-loaded cylindrical cavities using a one-dimensional finite element method. IEEE Transactions on Microwave Theory and Techniques. 37 (10), 1536-1541
Mirshekar-Syahkal, D. and Sadeghi, SHH., (1988). Study of the effect of frequency in crack depth measurement by the ac field technique. Review of Progress in Quantitative Nondestructive Evaluation. 7 A, 181-189
Mirshekar-Syahkal, D. and Jia, B., (1987). Analysis of bilateral finline couplers. Electronics Letters. 23 (11), 577-579
Mirshekar-Syahkal, D. and Mohammad Taheri, M., (1987). Unified approach to determination of modes in cylindrical cavities axisymmetrically loaded with dielectrics. Electronics Letters. 23 (22), 1177-1178
Mirshekar-Syahkal, D., (1986). Dispersion in shielded coupled coplanar waveguides. Electronics Letters. 22 (7), 358-360
Mirshekar-Syahkal, D. and Collins, R., (1985). Probe development for underwater applications of the A.C.F.M. technique.. IN: PROC. FOURTH INT. OFFSHORE MECHANICS & ARCTIC ENGINEERING SYMP., (DALLAS, U.S.A.,: FEB. 17-21, 1985), J.S. CHUNG; V.J. LU. II, New York, U.S.A., Am. Soc. Mech. Engrs., 1985, p.446-450.
Collins, R., Michael, DH., Mirshekar-Syahkal, D. and Pinsent, HG., (1985). Surface electromagnetic fields around surface flaws in metals. Journal of Nondestructive Evaluation. 5 (2), 81-93
Mirshekar-Syahkal, D. and Collins, R., (1985). Probe development for underwater applications of the A.C.F.M. technique.. IN: PROC. FOURTH INT. OFFSHORE MECHANICS & ARCTIC ENGINEERING SYMP., (DALLAS, U.S.A.,: FEB. 17-21, 1985), J.S. CHUNG; V.J. LU. II, New York, U.S.A., Am. Soc. Mech. Engrs., 1985, p.446-450.
(1984). Surface current distributions around surface flaws in metals. Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 393 (1804), 159-170
Chua, YL., Davies, JB. and Mirshekar-Syahkal, D., (1983). An Accurate Bivariate Formulation for Computer-Aided Design of Circuits Including Mlcrostrip. IEEE Transactions on Microwave Theory and Techniques. 31 (8), 685-687
Mirshekar-Syahkal, D., (1983). An Accurate Determination of Dielectric Loss Effect in Monolithic Microwave Integrated Circuits Including Microstrip and Coupled Microstrip Lines. IEEE Transactions on Microwave Theory and Techniques. 31 (11), 950-954
Mirshekar-Syahkal, D., Collins, R. and Michael, DH., (1982). The influence of skin depth on crack measurement by the ac field technique. Journal of Nondestructive Evaluation. 3 (2), 65-76
Mirshekar-Syahkal, D. and Davies, JB., (1982). Accurate Analysis of Coupled Strip-Finline Structure for Phase Constant, Characteristic Impedance, Dielectric and Conductor Losses. IEEE Transactions on Microwave Theory and Techniques. 30 (6), 906-910
Mirshekar-Syahkal, D. and Davies, JB., (1982). An Accurate, Unified Solution to Various Fin-Line Structures, of Phase Constant, Characteristic Impedance, and Attenuation. IEEE Transactions on Microwave Theory and Techniques. 30 (11), 1854-1861
Mirshekar-Syahkal, D., (1982). Probe characterization in ac field measurements of surface crack depth. Journal of Nondestructive Evaluation. 3 (1), 9-17
Mirshekar-Syahkal, D., Michael, DH. and Collins, R., (1981). Parasitic voltages induced by artificial flaws when measured using the ac field technique. Journal of Nondestructive Evaluation. 2 (3-4), 195-202
Mishekar-Syahkal, D. and Davies, JB., (1981). Accurate Analysis of Tapered Planar Transmission Lines for Microwave Integrated Circuits. IEEE Transactions on Microwave Theory and Techniques. 29 (2), 123-128
Mirshekar-Syahkal, D. and Davies, JB., (1980). Computation of the Shielded and Coupled Microstrip Parameters in Suspended and Conventional Form (Computer Program Descriptions). IEEE Transactions on Microwave Theory and Techniques. 28 (3), 274-275
Mirshekar-Syahkal, D. and Davies, JB., (1979). Accurate Solution of Microstrip and Coplanar Structures for Dispersion and for Dielectric and Conductor Losses. IEEE Transactions on Microwave Theory and Techniques. 27 (7), 694-699
Davies, JB. and Mirshekar-Syahkal, D., (1977). Spectral Domain Solution of Arbitrary Coplanar Transmission Line with Multilayer Substrate (Short Papers). IEEE Transactions on Microwave Theory and Techniques. 25 (2), 143-146
Book chapters (1)
Massey, PJ., Fellows, P., Mirshekar-Syahkal, D., Pal, A. and Mehta, A., (2016). Loop Antennas. In: Handbook of Antenna Technologies. Editors: Chen, ZN., Liu, D., Nakano, H., Qing, X. and Zwick, T., . Springer. 723- 786. 978-981-4560-43-6
Conferences (124)
Salarian, S. and Mirshekar-Syahkal, D., Separated Microstrip Antenna for Satellite Simulators
Divsalar, A., Salarian, S. and Mirshekar-Syahkal, D., MMW 60 GHz Tunable Periodic Filter
Mirshekar-Syahkal, D., A variable 60 GHz liquid crystal phase shifter
Tripathi, A., Nammi, R., Reeves, B., Clifford, B., Basu, A., Mirshekar, D., Nakano, H. and Mehta, A., (2024). Ultrabroadband 1×8 Vivaldi Array for Beam Steering Applications
Divsalar, A. and Mirshekar-Syahkal, D., (2023). Design Method for MMW LC Tunable Microstrip Periodic Filters
Salarian, S. and Mirshekar-Syahkal, D., (2021). Integrated Microstrip Antenna for Satellite Simulators
Salarian, S., Mostafavi, R., Mirshekar-Syahkal, D. and Zheng, G., (2019). Dual-beam Orthogonal Circular Polarized Antenna
Salarian, S. and Mirshekar-Syahkal, D., (2019). Ka-Band Microstrip Patch array Antenna for Satellite Communication
Deo, P., Mirshekar-Syahkal, D., Zheng, G., Pal, A. and Mehta, A., (2018). Broadband antenna for passive self-interference suppression in full-duplex communications
Zhou, H., Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2018). Smart sticker including split square rings for adapting mobile phone radiation pattern to lower SAR
Deo, P., Mirshekar-Syahkal, D. and Zheng, G., (2018). High isolation spiral antenna configurations for full-duplex communications
Deo, P., Mirshekar-Syahkal, D. and Zheng, G., (2018). EBG Enhanced Broadband Dual Antenna Configuration for Passive Self-Interference Suppression in Full-Duplex Communications
Deo, P., Mirshekar-Syahkal, D. and Zheng, G., (2018). EBG Enhanced Broadband Dual Antenna Configuration for Passive Self-Interference Suppression in Full-Duplex Communications
Pal, A., Zhou, H., Mehta, A., Nagasundaram, E., Lees, J. and Mirshekar-Syahkal, D., (2017). Co-design of an antenna-power amplifier RF front-end block without matching network for 2.4 GHz WiFi application
Seddon, L., James, R., Day, SE., Fernandez, FA., Deo, P. and Mirshekar-Syahkal, D., (2017). Accurate modelling for the analysis and design of liquid-crystal-based microwave devices
Zhou, H., Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2017). A smart mobile handset plastic case with integrated split ring resonators to reduce SAR
Zhou, H., Pal, A., Mehta, A., Nagasundaram, E., Lees, J. and Mirshekar-Syahkal, D., (2017). Power amplifier and antenna integration utilizing capacitively coupled feeding mechanism
Zhang, W., Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2017). Low-pofile beam-steerable microstrip antenna with metamaterial
Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2017). Performance analysis of a Switched Beam Square Loop Antenna in a multipath environment
Pliakostathis, K. and Mirshekar-Syahkal, D., (2015). Partially enclosed cylindrical dielectric resonator (DR) for multiband antennas
Barison, A., Deo, P. and Mirshekar-Syahkal, D., (2014). A switched beam 60 GHz 2×2-element planar antenna array
Yazdanpanahi, M., Deo, P. and Mirshekar-Syahkal, D., (2014). Tunable liquid-crystal millimeter-wave bandpass filter using periodical structure
Menon, SS., Deo, P. and Mirshekar-Syahkal, D., (2014). Slotted microstrip patch antenna with embedded feed
Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernandez, FA., (2014). Beam steering 60 GHz slot antenna array using liquid crystal phase shifter
Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2014). Dual band low-profile switched beam Square Loop Antenna with capacitively coupled feeds
Hammed, RT. and Mirshekar-Syahkal, D., (2013). Multiple band rejection notches in miniaturized UWB fifth-order filter using E-shape microstrip structures
Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernandez, FA., (2013). Liquid crystal based patch antenna array for 60 GHz applications
Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernandez, FA., (2013). 60 GHz liquid crystal phased array using reflection-type phase shifter
Hammed, RT. and Mirshekar-Syahkal, D., (2013). Multiple band rejection notches in miniaturized UWB fifth-order filter using E-shape microstrip structures
Hammed, RT. and Mirshekar-Syahkal, D., (2013). Multiple band rejection notches in miniaturized UWB fifth-order filter using E-shape microstrip structures
Hammed, RT. and Mirshekar-Syahkal, D., (2013). Multiple band rejection notches in miniaturized UWB fifth-order filter using E-shape microstrip structures
Seddon, L., Deo, P., Mirshekar-Syahkal, D., Day, S. and Fernandez, FA., (2013). Accurate modeling of liquid crystal-tuned meander-line phase-shifter
Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernández, FA., (2013). Development of 60 GHz Phased Antenna Arrays Using Liquid Crystal Phase-shifters
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2013). A low-profile switched-beam dual-band capacitively coupled Square Loop Antenna
Hammed, RT. and Mirshekar-Syahkal, D., (2013). Multiple band rejection notches in miniaturized UWB fifth-order filter using E-shape microstrip structures
Hammed, RT. and Mirshekar-Syahkal, D., (2012). Compact multi-notched UWB bandpass filter using E-shape microstrip structure
Hammed, RT. and Mirshekar-Syahkal, D., (2012). Compact multi-notched UWB bandpass filter using E-shape microstrip structure
Hammed, RT. and Mirshekar-Syahkal, D., (2012). Miniaturised UWB filter with improved lower stopband performance
Deo, P., Yazdanpanahi, M. and Mirshekar-Syahkal, D., (2012). Effect of test device thickness on liquid crystal characterisation
Deo, P. and Mirshekar-Syahkal, D., (2012). 60 GHz beam-steering slotted patch antenna array using liquid crystal phase-shifters
Yazdanpanahi, M. and Mirshekar-Syahkal, D., (2012). Millimeter-wave liquid-crystal-based tunable bandpass filter
Hammed, RT. and Mirshekar-Syahkal, D., (2012). A compact high selectivity seventh-order UWB bandpass filter with ultra-stopband attenuation
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2012). Low-profile Capacitively Fed steerable Square Loop Antenna
Hammed, RT. and Mirshekar-Syahkal, D., (2012). Miniaturized high-order UWB bandpass filter using third-order E-shape microstrip structure
Deo, P., Mirshekar-Syahkal, D., Pant, M., Mehta, A. and Nakano, H., (2011). Single pole four throw (SP4T) switch integration with a steerable square loop antenna
Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2011). Semi doughnut pattern Square Loop Antenna for vehicular and wireless applications
Hammed, RT. and Mirshekar-Syahkal, D., (2011). A lumped element equivalent circuit of E-shape microstrip structure for UWB filter design
Hammed, RT. and Mirshekar-Syahkal, D., (2011). High-order UWB bandpass filter using cascaded E-shape microstrip structure
Bulja, S., Mirshekar-Syahkal, D., James, R., Day, SE. and Fernandez, FA., (2010). Measurement of Dielectric Properties of Nematic Liquid Crystals at Millimeter Wavelength
Yazdanpanahi, M. and Mirshekar-Syahkal, D., (2010). Investigation of coupling based on liquid crystal in two end-coupled microstrip resonators
Budhawant, A., Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2010). Wi-Fi range and speed enhancement using HHIS based steerable square loop antenna
Yazdanpanahi, M., Bulja, S., Mirshekar-Syahkal, D., James, R., Day, SE. and Fernśndez, FA., (2010). Liquid-crystal-based mm-wave tunable resonator
Gautam, N., Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2010). Circularly polarized square patch antenna with square slots for RFID reader applications
Bulja, S., Mirshekar-Syahkal, D., Yazdanpanahi, M., James, R., Day, SE. and Fernandez, FA., (2010). 60 GHz Reflection Type Phase Shifter based on liquid crystal
Bulja, S., Mirshekar-Syahkal, D., Yazdanpanahi, M., James, R., Day, SE. and Fernández, FA., (2010). Liquid crystal based phase shifters in 60 GHz band
Bulja, S., Mirshekar-Syahkal, D., Yazdanpanahi, M., James, R., Day, SE. and Fernandez, FA., (2010). Advances in LC characterization with application to development of mm-wave devices
Hashemi, S. and Mirshekar-Syahkal, D., (2009). A new generation of microwave bandpass filters using multilayer ring resonators
Bulja, S., Mirshekar-Syahkal, D. and Yazdanpanahi, M., (2009). Novel wide-band transition between Finite Ground Coplanar Waveguide (FGCPW) and balanced stripline
Hashemi, S. and Mirshekar-Syahkal, D., (2009). Ultra compact filters for ultra-wideband (UWB) applications using multilayer ring resonators
Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2009). Beam switched loop antennas - square to circular
James, R., Anibal Fernandez, F., Day, SE., Bulja, S., Mirshekar-Syahkal, D. and Yazdanpanahi, M., (2009). Finite element analysis of a balanced microstrip line filled with nematic liquid crystal
Deo, P., Mehta, A., Mirshekar-Syahka, D., Massey, PJ. and Nakano, H., (2009). Circular loop antenna for pattern steerable applications
Raaza, A., Mehta, A., Mirshekar-Syahkal, D. and Rajagopalan, SP., (2009). A versatile beam steering double square loop antenna for modern wireless communications
Bulja, S., Mirshekar-Syahkal, D., Yazdanpanahi, M., James, R., Day, SE. and Fernandez, FA., (2009). Planar transmission line method for measurement of dielectric constants of liquid crystals in 60 GHz band
Deo, P., Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2009). A beam switched loop antenna for pattern reconfigurable applications
Mehta, A., Mirshekar-Syahkal, D. and Massey, PJ., (2008). Recent progress in switched beam single element antennas
Raaza, A., Mehta, A., Mirshekar-Syahkal, D. and Massey, PJ., (2008). A novel 8 feed beam switched antenna
Mehta, A., Mirshekar-Syahkal, D., Massey, PJ. and Nakano, H., (2008). A switched beam star patch antenna
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2007). Novel star antenna for beam steering applications
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2007). Novel star antenna for beam steering applications
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2006). A MEMS based shorted spiral antenna
Bulja, S. and Mirshekar-Syahkal, D., (2006). Broadbanding Microstrip Antennas using Unequal Patches
Bulja, S. and Mirshekar-Syahkal, D., (2005). A new structure for reflection-type phase shifter with 360/spl deg/ phase control range
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2005). Non linear dielectric based spiral antenna for beam adaptation
Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2005). A Switched Beam Single Arm Rectangular Spiral Antenna With Hybrid Switch Network
Bulja, S. and Mirshekar-Syahkal, D., (2005). A New Structure for Reflection-type Phase Shifter with 360° Phase Control Range
Pliakostathis, K. and Mirshekar-Syahkal, D., (2004). Stepped dielectric resonator antennas for wideband applications
Mehta, A. and Mirshekar-Syahkal, D., (2004). Spiral antenna with adaptive radiation pattern under electronic control
Chua, LH. and Mirshekar-Syahkal, D., (2003). Rigorous Analysis of Effect of Input-output Direct Coupling on Triple-mode Third-order Chebyshev Bandpass Filter
Chua, LH. and Mirshekar-Syahkal, D., (2003). Analysis and design of three transmission zeros bandpass filter utilizing triple-mode dielectric loaded cubical cavity
Lye Heng Chua and Mirshekar-Syahkal, D., (2003). Rigorous analysis of effect of input-output direct coupling on triple-mode third-order Chebyshev bandpass filter
Chua, LH. and Mirshekar-Syahkal, D., (2002). Triple-mode Filter Based on Dielectric Loaded Cubical Cavity
Pliakostathis, K. and Mirshekar-Syankal, D., (2002). A novel enclosed cylindrical dielectric resonator antenna
Lim, YCM., Mostafavi, RF. and Mirshekar-Syahkal, D., (2001). Quasi-static numerical analysis of loop-gap resonator
Mostafavi, RF., Mirshekar-Syahkal, D. and Lim, YCM., (2001). Small filters based on slotted cylindrical ring resonators
Mostafavi, RF., Mirshekar-Syahkal, D. and Lim, YCM., (2001). Small filters based on slotted cylindrical-ring resonators
Lim, YCM., Mostafavi, RF. and Mirshekar-Syahkal, D., (2001). Unloaded Q-Factor of Slotted Cylindrical Ring Resonator
Mamasis, K. and Mirshekar-Syahkal, D., (2001). Compact Dielectric Resonator Filter for Mobile Communications
Akhavan, HG. and Mirshekar-Syahkal, D., (2000). Microstrip-fed coupled slots antenna for wide-band applications
Akhavan, HG. and Mirshekar-Syahkal, D., (2000). Series microstrip-fed two-element slot antenna
Chuma, JM. and Mirshekar-Syahkal, D., (2000). Compact Dielectric Loaded Combline Filter with Low Insertion-loss
Mirshekar-Syahkal, D., Lim, YCM. and Mostafavi, RF., (2000). Resonant Frequency of Slotted Ring Resonator
Akhavan, HG., (1999). Slot antennas for measurement of properties of dielectrics at microwave frequencies
Mirshekar-Syahkal, D., (1999). Coupling between two modified v-shaped tapered slot antennas
Mirshekar-Syahkal, D. and Wang, HY., (1998). Single and coupled modified V-shaped tapered slot antennas
Mostafavi, R. and Mirshekar-Syahkal, D., (1998). Mathematical modeling of the interaction of non-uniform field ACFM with finite size cracks
Mirshekar-Syahkal, D., (1998). Review of high sensitivity AC field measurement - Recent advances and future work
Chuma, JM., Mirshekar-Syahkal, D., Abbas, F., Normington, P. and Zadeh, M., (1998). An Elliptic Function Combline Filter using Electric Probe to Realise Capacitive Coupling
Akhavan, HG. and Mirshekar-Syahkal, D., (1997). Study of coupled slot antennas fed by microstrip lines
Wang, HY., Sangster, AJ. and Mirshekar-Syahkal, D., (1997). Investigation of nonresonant slots in the narrow wall of a rectangular waveguide
Wang, HY., Mirshekar-Syahkal, D. and Dilworth, IJ., (1997). Numerical modeling of V-shaped linearly tapered slot antennas
Akhavan, HG. and Mirshekar-Syahkal, D., (1997). Characteristics of fundamental and first higher-order modes of microstrip-fed slot antennas
Wang, HY., Mirshekar-Syahkal, D. and Dilworth, IJ., (1997). Rigorous analysis of tapered slot antennas on dielectric substrates
Mostafavi, RF. and MirshekarSyahkal, D., (1997). A novel linear array system for inspection of large metal surfaces
MirshekarSyahkal, D. and Mostafavi, RF., (1997). Crack signal saturation in high sensitivity ACFM technique
Akhavan, HG. and MirshekarSyahkal, D., (1997). Slot resonators for characterization of dielectrics at microwave frequencies
Mirshekar-Syahkal, D., (1996). An efficient computer modelling of crack responses in nonuniform field ACFM non-destructive testing
MirshekarSyahkal, D. and Mostafavi, RF., (1996). High sensitivity AC field measurement using rhombic inducer
Huang, Y., Dilworth, IJ. and Mirshekar-Syahkal, D., (1995). TLM analysis of tapered slot antennas
Akhavan, HG. and Mirshekar-Syahkal, D., (1995). Simple technique for evaluation of input impedance of microstrip-fed slot antennas
Mirshekar-Syahkal, D., (1994). Moment method of computing equivalent circuit of coplanar waveguide T-junction
Mirshekar-Syahkal, D., (1994). Application of spectral domain technique in analysis of multi-layer planar antennas and radiating structures
Sadeghi, SHH., (1994). Efficient computer modelling of interaction of field and surface crack in surface magnetic field measurement technique
Mirshekar-Syahkal, D. and Danneel, J., (1994). Criteria for single mode operation of packaged coplanar waveguide circuits
Mirshekar-Syahkal, D., (1994). A Quasi-Static Spectral Domain Technique for Modelling Discontinuities in CPW Structures
Mirshekar-Syahkal, D., Newson, DJ., Wake, D. and Henning, ID., (1994). Coplanar Waveguide to Slotline Transitions for Tapered Slot Antennas on Indium Phosphide
MIRSHEKARSYAHKAL, D., MOSCHOVINOS, C. and HADJIKYRIAKOS, P., (1994). A NEW COMBINATION OF PROBE AND INDUCER WITH ENHANCED SENSITIVITY FOR AC FIELD MEASUREMENT OF SURFACE CRACKS
MIRSHEKARSYAHKAL, D. and SADEGHI, SHH., (1994). ADVANCES IN SURFACE MAGNETIC-FIELD MEASUREMENT TECHNIQUE FOR DETECTION AND SIZING OF SURFACE-BREAKING CRACKS IN OFFSHORE STRUCTURES
Mirshekar-Syahkal, D. and Hassani, HR., (1993). Characteristics of stacked rectangular and triangular patch antennas for dual band applications
Mirshekar-Syahkal, D. and Ofosu, WK., (1993). Analysis of open-end slot-line for examining radiation mechanisms of constant width and tapered slot antennas
SADEGHI, SHH. and MIRSHEKARSYAHKAL, D., (1990). A NEW TECHNIQUE FOR SIZING CRACKS IN METALS, UTILIZING AN INDUCED SURFACE MAGNETIC-FIELD
SADEGHI, SHH. and MIRSHEKARSYAHKAL, D., (1990). A METHOD FOR SIZING LONG SURFACE CRACKS IN METALS BASED ON THE MEASUREMENT OF THE SURFACE MAGNETIC-FIELD
Hassani, HR. and Mirshekar-Syahkal, D., (1989). Full-wave analysis of stacked rectangular microstrip antennas
Mirshekar-Syahkal, D. and Collins, R., (1985). PROBE DEVELOPMENT FOR UNDERWATER APPLICATIONS OF THE A. C. F. M. TECHNIQUE.
Grants and funding
2023
All analogue full-duplex dual-receiver radio for wideband mm-wave communications
Engineering and Physical Sciences Research Council
2018
Atlantic Microwave KTP
Innovate UK (formerly Technology Strategy Board)
2016
Coupling to NFC antenna at a distance
Gain Loyalty Limited
2015
Unlocking Potentials of MIMO Full-duplex Radios for Heterogeneous Networks (UPFRONT)
Engineering & Physical Sciences Res.Council
2010
Liquid Crystal Based Beam Steerable Planar Antennas
Engineering & Physical Sciences Res.Council
Contact
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