People

Professor Dariush Mirshekar-Syahkal

Professor
School of Computer Science and Electronic Engineering (CSEE)
Professor Dariush Mirshekar-Syahkal

Profile

Biography

Member of the RF (Radio Frequency) Group RF 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

  • Engineering Electromagnetics (CE266)

  • Signal Processing (CE331)

Publications

Journal articles (86)

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

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

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

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]

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

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), 686-686

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., 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

Bulja, S. and Mirshekar-Syahkal, D., (2010). Meander line millimetre-wave liquid crystal based phase shifter. Electronics Letters. 46 (11), 769-769

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

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., (2010). Novel Wideband Transition Between Coplanar Waveguide and Microstrip Line. IEEE Transactions on Microwave Theory and Techniques. 58 (7), 1851-1857

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

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

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), 962-962

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

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

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), 1389-1389

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), 491-491

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

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

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

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

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

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

Chuma, J., Sim, CW. and Mirshekar-Syahkal, D., (1999). Computation of resonant frequencies of dielectric loaded rectangular cavity using TLM method. Electronics Letters. 35 (20), 1712-1712

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

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

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

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

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

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 transitions with multi-arm stubs. Electronics Letters. 32 (23), 2106-2106

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 for MMIC and OEIC applications at millimetre-wave frequencies. Electronics Letters. 31 (24), 2060-2061

Ofosu, WK. and Mirshekar-Syahkal, D., (1995). Radiation pattern of short constant-width slot 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

Akhavan, HG. and Mirshekar-Syahkal, D., (1994). Approximate model for microstrip fed slot antennas. Electronics Letters. 30 (23), 1902-1903

Mirshekar-Syahkal, D. and Sadeghi, SHH., (1994). Surface magnetic field measurement technique for nondestructive testing of metals. Electronics Letters. 30 (3), 210-211

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

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), 1177-1177

Mirshekar-Syahkal, D., (1986). Dispersion in shielded coupled coplanar waveguides. Electronics Letters. 22 (7), 358-358

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.

Collins, R., Mirshekar-Syahkal, D. and Michael, DH., (1984). Surface Current Distributions Around Surface Flaws in Metals. Proceedings of the Royal Society A: Mathematical, Physical and Engineering 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 (108)

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., Zheng, G., Pal, A. and Mehta, A., (2018). Broadband antenna for passive self-interference suppression in full-duplex communications

Deo, P., Mirshekar-Syahkal, D. and Zheng, G., (2018). High isolation spiral antenna configurations for 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

Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2017). Performance analysis of a Switched Beam Square Loop Antenna in a multipath environment

Zhang, W., Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2017). Low-pofile beam-steerable microstrip antenna with metamaterial

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

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

Pal, A., Mehta, A. and Mirshekar-Syahkal, D., (2014). Dual band low-profile switched beam Square Loop Antenna with capacitively coupled feeds

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

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., Seddon, L., Day, SE., Mirshekar-Syahkal, D. 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

Seddon, L., Deo, P., Mirshekar-Syahkal, D., Day, S. and Fernandez, FA., (2013). Accurate modeling of liquid crystal-tuned meander-line phase-shifter

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). 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

Deo, P., Mirshekar-Syahkal, D., Seddon, L., Day, SE. and Fernandez, FA., (2013). Liquid crystal based patch antenna array for 60 GHz applications

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

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

Deo, P., Yazdanpanahi, M. and Mirshekar-Syahkal, D., (2012). Effect of test device thickness on liquid crystal characterisation

Hammed, RT. and Mirshekar-Syahkal, D., (2012). Miniaturised UWB filter with improved lower stopband performance

Pal, A., Mehta, A., Mirshekar-Syahkal, D. and Nakano, H., (2012). Low-profile Capacitively Fed steerable Square Loop Antenna

Deo, P. and Mirshekar-Syahkal, D., (2012). 60 GHz beam-steering slotted patch antenna array using liquid crystal phase-shifters

Hammed, RT. and Mirshekar-Syahkal, D., (2012). Miniaturized high-order UWB bandpass filter using third-order E-shape microstrip structure

Hammed, RT. and Mirshekar-Syahkal, D., (2012). A compact high selectivity seventh-order UWB bandpass filter with ultra-stopband attenuation

Yazdanpanahi, M. and Mirshekar-Syahkal, D., (2012). Millimeter-wave liquid-crystal-based tunable bandpass filter

Hammed, RT. and Mirshekar-Syahkal, D., (2011). A lumped element equivalent circuit of E-shape microstrip structure for UWB filter design

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). High-order UWB bandpass filter using cascaded E-shape microstrip structure

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., James, R., Day, SE. and Fernandez, FA., (2010). Measurement of Dielectric Properties of Nematic Liquid Crystals at Millimeter Wavelength

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

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). A new generation of microwave bandpass filters 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

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). 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., Nakano, H. and IEEE, (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., (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

Mehta, A. and Mirshekar-Syahkal, D., (2004). Spiral antenna with adaptive radiation pattern under electronic control

Pliakostathis, K. and Mirshekar-Syahkal, D., (2004). Stepped dielectric resonator antennas for wideband applications

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., (2003). Analysis and design of three transmission zeros bandpass filter utilizing triple-mode dielectric loaded cubical cavity

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., (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). Unloaded Q-Factor of Slotted Cylindrical Ring Resonator

Mamasis, K. and Mirshekar-Syahkal, D., (2001). Compact Dielectric Resonator Filter for Mobile Communications

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). Quasi-static numerical analysis of loop-gap resonator

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. and Mirshekar-Syahkal, D., (2000). Microstrip-fed coupled slots antenna for wide-band applications

Akhavan, HG. and Mirshekar-Syahkal, D., (1999). Slot antennas for measurement of properties of dielectrics at microwave frequencies

Mirshekar-Syahkal, D. and Wang, HY., (1999). Coupling between two modified V-shaped tapered slot antennas

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

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

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). Efficient computer modelling of crack responses in non-uniform 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., Hassani, HR. and Ofosu, WK., (1994). Application of spectral domain technique in analysis of multi-layer planar antennas and radiating structures

Mirshekar-Syahkal, D., (1994). Moment method of computing equivalent circuit of coplanar waveguide T-junction

Sadeghi, SHH. and Mirshekar-Syahkal, D., (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. and Hassani, HR., (1993). Characteristics of stacked rectangular and triangular patch antennas for dual band applications

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

2018

Atlantic Microwave KTP

Innovate UK (formerly Technology Stategy 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

dariush@essex.ac.uk
+44 (0) 1206 872406

Location:

1NW.3.18, Colchester Campus