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Annual Report of Activities April 2004Microwaves
& RF subarea Research Activities The research has been
in 4 main areas: (1) This was a key activity from the grants rolled into the portfolio and this work will continue until December 2004 to fulfil our commitments to the collaborating parties (Leeds and Sheffield) in the project. The work has focussed on travelling-wave phototransistors in InP technology. Our contribution has been in the modelling and characterisation of the devices. The design of a second mask-set containing the layouts of a wide variety of new improved structures has been completed recently. (2) A multilayer MCM process has been established in the ATI using photoimageable thick-film technology. A variety of passive components has been demonstrated up to 110 GHz. A design for an integrated receiver at 60 GHz has been sent for mask fabrication. The process will be able to be used in the work to construct an UWB transceiver demonstrator in collaboration with CCSR. (3) Work has concentrated on the generation of OFDM signals using the LINC technique. OFDM is highly suited to the realisation of PAN type networks due to its resilience to multipath effects. (4) Collaboration has started on characterising and optimising the amorphous carbon RTD devices. Staff Funded directly by Portfolio: DTG funded and engaged
in portfolio projects Other students engaged
in portfolio projects
C. Y. Ng, M. Chongcheawchamnan, M. S. Aftanasar, I. D. Robertson, P. R. Young and J. Minalgiene, "Characterization of TFMS lines fabricated using photoimageable thick-film technology", IEE Proc. - Microwave, Antennas and Propagation, Volume 150, Issue 03. June 2003, pp. 125-130. Kpogla DKA, Ng CY, Robertson ID. "Shifted-quadrant microwave vector modulator"., Electronics Letters, vol.39, no.14, 10 July 2003, pp.1058-9 M. Chongcheawchamnan, K. Bandudej, A. Worapishet, C. Y. Ng and I. D. Robertson, "An All-Ports Matched Impedance-Transforming Marchand Balun and its Mixer Application", IEICE Transactions on Electronics, Aug. 2003, pp. 1593-1600 . K.L. Tsakmakidis, L. Gomez-Rojas, I.D. Robertson, O. Hess, P. A. Houston and B. Weiss, "Numerical demonstration of the velocity mismatch effect in a traveling-wave heterojunction phototransistor", Electronics Letters, 2004 A.Azirar and I.D.Robertson, "Linear Frequency Translation and Amplification with Nonlinear Components", Electronics Letters, 2004 R. Sobrany and I. D. Robertson, "Ruthroff Transmission Line Transformers using Multilayer Technology" , European Microwave Conference, October 2003. D. Kpogla, M. Chongcheawchamnan and I. D. Robertson, "Investigation of SSB-BPSK Modulation for Communication Applications", European Wireless Technologies Conference, October 2003. C. Y. Ng, M. Chongcheawchamnan and I. D. Robertson, "Miniature 38GHz Couplers and Baluns using Multilayer GaAs MMIC Technology", European Microwave Conference, October 2003. C. Y. Ng, M. Chongcheawchamnan and I. D. Robertson, "Miniature Ka-Band I/Q Vector Modulator using 3D-MMIC Technology", European Microwave Conference, October 2003. K.L. Tsakmakidis, L. Gomez-Rojas, I.D. Robertson, O. Hess, P. A. Houston and B. Weiss, "InP Traveling-Wave HPT Modelling using the FDTD Method", SPIE Photonics 2004 Conference, Strasbourg, April 2004 A. Azirar and I. D. Robertson, "OFDM LINC Transmitter with Digital I/Q Imbalance Compensation", IEEE MTT-S International Microwave Symposium Digest, June 2004 C. E. Free, D. Stephens,
P. Camina and I. D. Robertson, "Microwave Planar Circuits using
Modern Thick-Film Technologies", Broadband Wireless Forum,
Cambridge, Nov. 2003. Copyright UniS -2004 |
