Imperial College London

Professor Stepan Lucyszyn, FIEEE

Faculty of EngineeringDepartment of Electrical and Electronic Engineering

Professor of Millimetre-wave Systems
 
 
 
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Contact

 

+44 (0)20 7594 6167s.lucyszyn Website CV

 
 
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Assistant

 

Ms Susan Brace +44 (0)20 7594 6215

 
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Location

 

602Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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238 results found

Lucyszyn S, Evaluating surface impedance models for normal metals in the extreme anomalous region, 23rd TEA Progress in Electromagnetics Research Symposium (PIERS2008) Digest of Abstracts, Pages: 202-202

Conference paper

Lucyszyn S, Pranonsatit S, Choi JY, Moseley RW, Yeatman EM, Holmes ASet al., 2007, (Invited Paper) Novel RF MEMS switches, Pages: 55-58

Conference paper

Lucyszyn S, 2007, RFIC and MMIC measurement techniques, Microwave Measurements, Editors: Collier, Skinner, Publisher: IET, Pages: 217-262, ISBN: 978-0-86341-735-1

Book chapter

Lucyszyn S, 2007, Comment on "Study of excess conduction loss in normal metals at/below sub-millimeter wavelengths", International Journal of infrared and Millimeter Waves, Springer Science, Vol: 28, Pages: 263-266

Journal article

Lee J S, Lucyszyn S, 2007, Thermal analysis for bulk-micromachined electrothermal hydraulic microactuators using a phase change material, Sensors and Actuators A: Physical, Elsevier, Vol: 135, Pages: 731-739

Journal article

Lucyszyn S, Pilchen Y, Robertson ID, Aghvami AHet al., 2007, Ku-band serrodyne frequency translator using wideband MMIC analogue phase shifters, 23rd European Microwave Conference Proceedings, Publisher: IEEE, Pages: 819-822

A novel Ku-band serrodyne frequency translator is presented which employs wideband MMIC analogue phase shifters. The MMICs have a simple topology and are fabricated using low cost foundry processing techniques. The resulting highly nonlinear tuning behaviour of the complete 360° phase shifter is overcome with two different types of modulating signal: the first having a predistorted sawtooth function (using DSP techniques) and the second having a linear sawtooth function (resulting in 20% under-modulation). With an input carrier frequency of 14GHz, the measured results demonstrate high levels of carrier suppression and unwanted sideband suppression, with both functions. This performance was maintained at all carrier frequencies in the 13 to 15GHz frequency range - without having to modify the functions. In addition, 0dB conversion loss was achieved and almost no control power was required.

Conference paper

Chrisostomidis CE, Guglielmi M, Young PR, Lucyszyn Set al., 2007, Application of chained functions to low-cost microwave band-pass filters using standard PCB etching techniques, 30th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 40-43

In this paper, the application of the chained function polynomials to the design of low-cost microwave band-pass filters is presented. The chained function concept provides a variety of transfer functions to choose from, each one having different characteristics and different implementation requirements. Thus, reduced sensitivity to manufacturing tolerances can be achieved by selecting the appropriate transfer function for a given manufacturing technology. The achieved reduction is confirmed experimentaly at millimetre-wave frequencies, using parallel-coupled line band-pass filter designs manufactured using standard PCB etching techniques.

Conference paper

McPherson DS, Stubbs MG, Wight JS, Lucyszyn Set al., 2007, A 28 GHz HBT vector modulator and its application to an LMCS feedforward power amplifier, 28th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 523-528

A vector modulator employing four amplitude modulated orthogonal channels is presented. Operating at 28 GHz, this device consists of a four-way 6 dB power divider, four GaAs HBT MMIC variable gain amplifiers, and a 4-to-1 power combiner All of the passive functions were realised on alumina ceramic while the amplifier chips were fabricated at Nortel Technologies using a 3.5 μm × 6 μm GaInP-GaAs HBT process. By testing a vector modulator prototype, we were able to evaluate the architecture and be the first to assess its suitability as a gain/phase control element for a Ka-band MCS adaptive feedforward lineariser.

Conference paper

Lucyszyn S, Oztek-Yerli CF, Robertson ID, 2007, Accurate modelling of cold-MESFETs for adaptive MMIC signal processing applications, 25th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 1177-1180

At microwave frequencies, variable resistors can beimplemented with cold-MESFETs. An accurate ultrawidebandmodel for cold-MESFETs is presented. Theequivalent circuit model is based on the physicalstructure of the device and has a simple topology thatrequires only two bias dependant elements. The modelhas been used to accurately characterise coldMESFETsfrom 0.05 to 20.05 GHz. Moreover, unlikethat for a switched-MESFET, the model is accurate overa continuous and wide range of bias points.

Conference paper

Lucyszyn S, Sewell T, Robertson ID, 2007, Multi-level digital modulation performed directly at carrier frequency, 25th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 673-676

Direct modulation of the carrier signal has been shown to be an attractive means of reducing the complexity of the RF hardware required in a communications transceiver. To this end, a proof-of concept X-band vector modulator, realised using monolithic phase shifters and attenuators, has been used to demonstrate that multi-level digital modulation can be implemented at high data rates and without requiring significant control power. The measured constellations for QPSK, 32-PSK and 16 QAM modulation are presented. This technique is suitable for both microwave and millimetre wave appicatons.

Conference paper

Lucyszyn S, Robertson ID, 2007, High performance analogue MMIC control devices for adaptive phased array applications, 24th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 1796-1801

Three different MMIC analogue reflection-type control devices are presented. The variable delay line is the first to be realised using monolithic technology, while the phase shifter and attenuator have been designed to achieve optimal bandwidths. With all of the devices, high levels of performance were measured across the 8-12 GHz frequency range.

Conference paper

Lucyszyn S, Robertson ID, 2007, An improved multi-layer quadrature coupler for MMICs, 21st European Microwave Conference Proceedings, Publisher: IEEE, Pages: 1154-1158

Abstract:A novel technique for significantly reducing the insertion loss of multi-layer quadrature couplers is presented. With previous broadside multi-layer couplers, realized on GaAs MMICs, the upper conducting layer track is overlayed exactly onto the much thinner lower conducting layer track - resulting in a high insertion loss. A new multi-layer structure is presented that has an upper track which is offset - so that the lower track can be plated-up with the much thicker metal from the upper track, thus, reducing the even-mode insertion loss. A coupler, with a centre frequency of 7.7GHz, incorporating this technique has been realized on a GaAs MMIC, with maximum dimensions of only 1.l×0.8mm. The resulting insertion loss at centre frequency is less than 1dB. The overall performance has been found to equally match that of the Lange coupler.

Conference paper

Lucyszyn S, Robertson ID, Aghvami AH, 2007, Monolithic analogue phase shifter and cascode FET amplifier using uniplanar techniques, 24th European Microwave Conference Proceedings, Publisher: IEEE, Pages: 554-559

A precision millimetre-wave analogue phase shifter and a miniature Ku-band cascode FET amplifier are presented. Both MMICs are realised using uniplanar technology. The phase shifter employs a blend of coplanar waveguide and multilayer techniques. It has a worst-case rms phase error of only ± 1.0°, for all levels of relative phase shift up to 120°, across the 31 to 32 GHz frequency range. The amplifier is realised using a combination of coplanar waveguide, meandered 'thin-film' microstrip, and lumped elements. The amplifier has an active area of only 0.9 mm2 and a measured gain of over 12 dB at 15 GHz.

Conference paper

Lucyszyn S, 2007, Comment on "Study of excess conduction loss in normal metals at/below sub-millimeter wavelengths" by W. Pan and X. Zhang, Int. J. of infrared and millimeter waves, vol. 27, no. 3, 455-464, Mar. 2006, International Journal of Infrared and Millimeter Waves, Vol: 28, Pages: 263-266, ISSN: 1866-6906

Journal article

Lucyszyn S, 2007, Evaluating surface impedance models for terahertz frequencies at room temperature, Pages: 1868-1873

Conference paper

Larsson M P, Kjelstrup-Hansen J, Lucyszyn S, 2007, DC characterisation of C60 whiskers and nanowhiskers, ECS Transactions, The Electrochemical Society, Vol: 2, Pages: 27-38

Journal article

Lee J S, Lucyszyn S, 2007, Design and pressure analysis for bulk-micromachined electrothermal hydraulic microactuators using a PCM, Sensors and Actuators A: Physical, Elsevier, Vol: 133, Pages: 294-300

Journal article

Lucyszyn S, Pranonsatit S, Choi JY, Moseley RW, Yeatman EM, Holmes ASet al., 2007, Novel RF MEMS Switches, Asia Pacific Microwave Conference, Publisher: IEEE, Pages: 338-+

Conference paper

Lucyszyn S, 2007, Evaluating surface impedance models for terahertz frequencies at room temperature, Progress in Electromagnetics Research Symposium (PIERS 2007), Publisher: ELECTROMAGNETICS ACAD, Pages: 1418-1423

Conference paper

Lucyszyn S, 2007, Evaluating surface impedance models for terahertz frequencies at room temperature, PIERS Online, Vol: 3, Pages: 554-559

Journal article

Pranonsatit S, Holmes A S, Robertson I D, Lucyszyn Set al., 2006, Single-pole eight-throw RF MEMS rotary switch, Journal of Microelectromechanical Systems, Vol: 15, Pages: 1735-1744, ISSN: 1057-7157

The design, fabrication, and measured performance of a novel single-pole eight-throw radio-frequency (RF) microelectromechanical systems (MEMS) rotary switch are described. The concept of this rotary switch is based on the adaptation of the axial gap wobble motor. A prototype switch has been made using separately fabricated stator, rotor, and cap components that are then assembled. A rigorous procedure was setup to investigate the direct current (dc) contact resistance over a total of four million rotor contact closures, with half a million closures made on each of the eight stator contacts. It was found that there was no obvious systematic trend in contact resistance over time. An average contact resistance of 2.5 Omega was recorded; however, values as low as 1.0 Omega were also found. The assembled rotary switch demonstrated an excellent RF performance. With the inclusion of feed lines, the insertion loss was 2.65 dB at 20 GHz, after renormalizing the measurement reference impedance. When the loss of the feed lines is subtracted, the worst-case on-state intrinsic insertion loss of the rotary switch is only 2.16 dB at 20 GHz. A worst-case off-state isolation of 31 dB was also measured over the 20-GHz bandwidth. The effective performance figure-of-merit for this switch in an arbitrary position was calculated to be 10.7 THz. To the authors' knowledge, this is the first example of a true single-pole multiple-throw RF MEMS rotary switch.

Journal article

Choi J Y, Lee J-S, Lucyszyn S, 2006, Development of RF MEMS switches for high power applications, IEEE Mediterranean Microwave Symposium (MMS’2006), Genoa, Italy, Pages: 293-296

Conference paper

Larsson M P, Lucyszyn S, 2006, A micromachined separable RF connector fabricated using low-resistivity silicon, Journal of Micromechanics and Microengineering, Institute of Physics Publishing, Vol: 16, Pages: 2021-2033

Journal article

Larsson MP, Kjelstrup-Hansen J, Lucyszyn S, 2006, DC characterisation of C60 whiskers using deposited and contacting electrodes, 209th ECS Meeting, 7 - 12 May 2006, Denver, Colorado, Publisher: ECS

Conference paper

Lee JS, Lucyszyn S, 2006, Bulk micromachined electrothermal hydraulic microactuator and its applications, The IET Seminar on MEMS Sensors & Actuators, 27 - 28 April 2006, London, Publisher: IET, Pages: 311-316

Conference paper

Pranonsatit S, Hong G, Holmes AS, Lucyszyn Set al., 2006, Rotary RF MEMS switch based on the wobble motor principle, 19th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2006), 22 - 26 January 2006, Istanbul, TURKEY, Publisher: IEEE, Pages: 886-889

Conference paper

Pranonsatit S, Hong G, Holmes AS, Lucyszyn Set al., 2006, Rotary RF MEMS switch based on the wobble motor principle, 19th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2006), 22 - 26 January 2006, Istanbul, TURKEY, Publisher: IEEE, Pages: 886-889

Conference paper

Pranonsatit S, Lucyszyn S, 2005, Self-assembled screen-printed microwave inductors, ELECTRONICS LETTERS, Vol: 41, Pages: 1287-1288, ISSN: 0013-5194

Journal article

Lucyszyn S, 2005, Investigation of Wang's model for room-temperature conduction losses in normal metals at terahertz frequencies, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol: 53, Pages: 1398-1403, ISSN: 0018-9480

Journal article

Lee JS, Lucyszyn S, 2005, Novel flat screen Braille display technology for the blind and partially sighted (Invited paper), 3rd international conference on materials for advanced technologies 2005 (ICMAT 2005) and 9th international conference on advanced materials (IUMRS-ICAM 2005), Symposium C (Biomedical Devices & Instrumentation), Technical Session 7 - Microfluidics

Conference paper

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