241 results found
Pranonsatit S, Holmes AS, Lucyszyn S, 2011, Microwave modelling of radio frequency microelectromechanical rotary switches, IET Microwaves, Antennas & Propagation, Vol: 5, Pages: 255-261
In this study, both full 3D electromagnetic and equivalent circuit modelling of a radio frequencymicroelectromechanical systems (RF MEMS) single-pole eight-throw rotary switch are reported for the first time. Excellentagreement has been achieved between measurements and modelled performance for frequencies up to 12 GHz. In order tovalidate the effectiveness of the modelling, a 2-bit true time delay phase shifter having a centre frequency of 2 GHz has beendemonstrated. The traditional topology of the switched delay line was adopted with two rotary switches employed for signalrouting. This phase shifter represents the first ever application of any RF MEMS rotary switch. It is shown that the switchmodel can accurately predict the measured performance of the phase shifter, without the need for adding new circuit elementsor tweaking of model parameters. The low measured root mean square deviations of insertion phase from the predictedresponses increase as 1.3o, 1.9o, 2.5o and 3.4o when the phase states are stepped through 0o, 90o, 180o and 270o, respectively.
Lucyszyn S, Zhou Y, 2011, Engineering approach to modelling metal THz structures, Online Journal of Terahertz Science and Technology (JTST), Vol: 4, Pages: 1-8, ISSN: 1941-7411
Lucyszyn S, Lu H, Hu F, 2011, Ultra-low Cost THz Short-range Wireless Link, IEEE-MTT-S International Microwave Workshop Series on Millimeter Wave Integrated Technologies, Publisher: IEEE, Pages: 49-52
This paper demonstrates an ultra-low cost THz system for implementing a short-range wireless communications link in the far/mid-infrared parts of the electromagnetic spectrum. The basic prototype front-end hardware is deliberately kept very simple; based around miniature incandescent light bulbs, THz filters and pyroelectric infrared sensors. While only a low data rate has been experimentally demonstrated so far, this does not represent a fundamental limitation, as a number of technological enhancements are possible. It is believed that this “THz torch” technology has its niche in ubiquitous security applications that do not require high data rates or large distance operation (e.g. secure RFID, smart key fobs and remote controls).
Pinuela M, Yates DC, Mitcheson PD, et al., 2011, Maximising the Link Efficiency of Resonant Inductive Coupling for Wireless Power Transfer, 1st International Workshop on Wireless Energy Transport and Harvesting, Pages: 1-4
Episkopou E, Papantonis S, Otter WJ, et al., 2011, Demystifying Material Parameters for Terahertz Electromagnetic Simulation, 4th UK/Europe-China Conference on Millimetre Waves and Terahertz Technologies, Pages: 80-81
Pinuela M, Mitcheson PD, Lucyszyn S, 2010, Analysis of Scalable Rectenna Configurations for Harvesting High Frequency Ambient Radiation, PowerMEMS 2010, Pages: 41-44
Lucyszyn S, 2010, Introduction, Advanced RF MEMS, Publisher: Cambridge University Press, Pages: 1-22, ISBN: 978-0-521-89771-6
Lucyszyn S, Pranonsatit S, Choi J-Y, et al., 2010, Niche switch technologies, Advanced RF MEMS, Publisher: Cambridge University Press, Pages: 73-108, ISBN: 978-0-521-89771-6
Herbertz K, Lucyszyn S, 2010, Electromagnetic bandgap filter with single-cell monolithic microwave integrated circuit-tuneable defect, IET Microwaves, Antennas and Propagation, Vol: 4, Pages: 1123-1131
Lucyszyn S, Zhou Y, 2010, THz Applications for the Engineering Approach to Modelling Frequency Dispersion within Normal Metals at Room Temperature, PIERS Online, Vol: 6, Pages: 293-299
The use of the accurate classical relaxation-effect model for frequency dispersion innormal metals at room temperature with THz structures can be mathematically cumbersome andnot insightful. Recent work has demonstrated that it is possible to dramatically simplify otherwise complex analysis and allows for a much deeper insight to be gained into the classical relaxation-effect model. This paper gives applications for this engineering approach. Here, using the concept of Q-factor for a metal, the synthesized equivalent transmission line model is validated. Then, using the concept of complex skin depth, analysis is performed on hollow metal-pipe rectangular waveguides and their associated cavity resonators. This work proves that the mathematical modelling of THz structures can be greatly simplied by taking an electrical engineering approach to these electromagnetic problems.
Chrisostomidis CE, Lucyszyn S, 2010, Seed function combination selection for chained function filters, Vol: 5, Pages: 799-807
An algorithm is presented for seed function combination selection for chained function filters on the basis of pre-defined manufacturing limitations. To this end, and for the first time, combinatorial analysismethods have been applied to computer-aided filter design routines. A fundamental Monte-Carlo margin has been discovered that represents an upper-bound on the worst-case pass-band return-loss responses that cannot be exceeded. This can be exploited to extend the state-of-the art in tuningless high-performance filterimplementations towards higher frequencies and smaller fractional bandwidths or, alternatively, to lower the accuracy and manufacturing cost for a given set of filter specifications.
Zhou Y, Lucyszyn S, 2010, Modelling of reconfigurable terahertz integrated architecture (RETINA) SIW structures, PIER Journal, Vol: 105, Pages: 71-92
This paper discusses for the first time the combined optoelectronic-electromagnetic modelling of a new technology that represents a paradigm shift in the way millimetre-wave and terahertz electronics can be implemented using the REconfigurable Terahertz INtegrated Architecture (RETINA) concept. Instead of having traditional metal-pipe rectangular waveguide structures with metal sidewalls, RETINA structures have photo-induced virtual sidewalls within a high resistivity silicon substrate. This new class of substrate integrated waveguide (SIW) technology allows individual components to be made tuneable and subsystems to be reconfigurable, by changing light source patterns. Detailed optoelectronic modelling strategies for the generation of virtual sidewalls and their electromagnetic interactions are presented in detail for the first time. It is found with double-sided illuminated RETINA structures that an insertion loss of 1.3 dB/ λg at 300 GHz is predicted for the dominant TE10 mode and for a cavity resonator a Q-factor of 4 at 173 GHz is predicted for the TE101 mode. While predicted losses are currently greater than other non-tuneable/reconfigurable SIW technologies, there is a wide range of techniques that can improve their performance, while still allowing completely arbitrary topologies to be defined in the x-z plane. For this reason, it is believed that this technology could have a profound impact on the future of millimetre-wave and terahertz electronics. As a result, this paper could be of interest to research groups that have the specialised experimental resources to implement practical demonstrator exemplars.
Lucyszyn S, Zhou Y, 2010, Engineering approach to modelling frequency dispersion within normal metals at room temperature for THz applications, PIER Journal, Vol: 101, Pages: 257-275, ISSN: 1559-8985
Lucyszyn S, Zhou Y, 2010, THz Applications for the Engineering Approach to Modelling Frequency Dispersion within Normal Metals at Room Temperature, Progress in Electromagnetics Research Symposium, Publisher: ELECTROMAGNETICS ACAD, Pages: 1378-1384, ISSN: 1559-9450
Lucyszyn S, 2010, Commercial Applications for RF MEMS, 40th European Microwave Conference, Publisher: IEEE, Pages: 348-348, ISSN: 2325-0305
Pranonsatit S, Holmes AS, Lucyszyn S, 2010, Sectorised Horn Antenna Array Using an RF MEMS Rotary Switch, 22nd Asia-Pacific Microwave Conference (APMC), Publisher: IEEE, Pages: 1909-1913
Robertson ID, Hizan HM, Hunter IC, et al., Millimeter-wave substrate-integrated circuits on photo-imageable substrate and LTCC, European Microwave Week (EuMW 2010) Workshop Proceedings: Recent Advances on Substrate Integrated Waveguide Filters
Lucyszyn S, Substrate integrated metal-pipe rectangular waveguides, IEEE International Microwave Symposium (IMS2010) Workshop Proceedings, WSI: Substrate Integrated Circuits
Lucyszyn S, Zhou Y, 2010, Characterising room temperature THz metal shielding using the engineering approach, PIER Journal, Vol: 103, Pages: 17-31
Lucyszyn S, 2010, Advanced RF MEMS, Publisher: Cambridge Univ Pr, ISBN: 9780521897716
A comprehensive and up-to-date guide to RF MEMS theory and applications.
Choi J-Y, Ruan J, Coccetti F, et al., 2009, Three-Dimensional RF MEMS Switch for Power Applications, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 56, Pages: 1031-1039, ISSN: 0278-0046
Larsson MP, Lucyszyn S, 2009, Mechanical characterization of C60 whiskers by MEMS bend testing, Journal of Physics: Conference Series (JPCS), Vol: 159, Pages: 1-8
Zhou Y, Lucyszyn S, 2009, HFSS™ modelling anomalies with THz metal-pipe rectangular waveguide structures at room temperature, EM Academy's PIERS Online Journal, Vol: 5, Pages: 201-211
Zhou Y, Lucyszyn S, 2009, HFSS™ Modelling Anomalies with THz Metal-Pipe Rectangular Waveguide Structures at Room Temperature, Progress in Electromagnetics Research Symposium (PIERS 2009), Publisher: ELECTROMAGNETICS ACAD, Pages: 1372-1382, ISSN: 1559-9450
Zaidon N, Larsson MP, Syms RRA, et al., 2009, Electrical and optical micromachined connectors, clips and clamps, Proc. Int. Conf. on MEMS (ICMEMS 2009)
Lucyszyn S, Miyaguchi K, Jiang HW, et al., 2008, Micromachined RF-coupled cantilever inverted-micro strip millimeter-wave filters, IEEE/ASME JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, Vol: 17, Pages: 767-776, ISSN: 1057-7157
Lucyszyn S, 2008, Microwave characterization of nickel, EM Academy’s PIERS Online Journal, Vol: 4, Pages: 686-690
Lucyszyn S, Zhou Y, 2008, Reconfigurable Terahertz Integrated Architecture (RETINA), 33rd International Conference on Infrared, Millimeter and Terahertz Waves, Publisher: IEEE, Pages: 269-270
Herbertz K, Lucyszyn S, 2008, Two-Dimensional Metamaterials for Dual-Band Filter Applications, 38th European Microwave Conference, Publisher: IEEE, Pages: 1614-1617
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