Prediction of tropospheric multipath effects on microwave communication system performance H Vasseur and D Vanhoenacker-Janvier Microwaves U.c.L. Bfitiment Maxwell Place du Levant 3, B-1348 Louvain-Ia-Neuve, Belgium. Abstract A simple deterministic model is proposed to represent in a realistic way the time evolution of nocturnal refractive layers in the lower troposphere. It enables simulations of

Design of a 8 x 16 element X-band microstrip array with wide sector characteristics including mutual coupling effects J Heinstadt, F Henkel DLR -Deutsche Forschungsanstalt fUr Luft- und Raumfahrt Institut fUrHochfrequenztechnik Postfach 1116 D-82205 Wessling. Tel.: 08153/282314 Fax.: 08153/281135 E-mail: johannes.heinstadt-dlr.de Abstract The most important advantages of microstrip antennas are th

Analysis and design of dual frequency reflectarrays using microstrip stacked patches of variable size Jose A. Encinar Departamento de Electromagnetismo y Teoda de Circuitos. Universidad Politecnica de Madrid Abstract A new stacked microstrip reflectarray based on patches of variable size has been proposed for dual frequency operation. A progressive phase distribution is achieved at both frequencie

A two-dimensional retrodirective array using- slot ring FET mixers Carl W. Pobanz and Tatsuo Itob Electrical Engineering Department, University of California, Los Angeles 405 Hilgard Avenue, Los Angeles, CA 90024 Abstract A printed 4-by-4 retrodirective antenna array has been developed, which employs the heterodyne phasing technique at 6 GHz. Each array element comprises a balanced FET resistive m

LMS adaptive array antenna using circular element arrangement Masanori Morita, Isao Ohtomo Kogakuin University 1-24-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan. Abstract An adaptive array antenna with linear element arrangement (LEA) is already well-known, but its scanning range is very narrow. Therefore, we have recently studied an adaptive array antenna with circular element arrangement (CEA), b

Electronically scanned FDF -antennas for autonomous intelligent cruise control radar applications Andrei S Cherepanov, Anton B Guskov, Yun P Yavon and Ernst F Zaitsev. St. Petersburg State Technical University Radiophysics Department, Polytechnicheskaya 29, St.Petersburg, 195251, RUSSIA. Tel. +7-812-5527685 Fax. +7-812-5422858 E-mail: yavon-rphd.hop.stu.neva.ru Abstract Paper reviews some original

High active device density Quasi-Optical amplifier Sion Teck Chew and Tatsno Itoh Electrical Engineering Department, University of California, Los Angeles, 405 Hilgard Avenue, 56-125B, Engineering. I~ Los Angeles, CA 90095. Abstract A quasi-optical amplifier using narrow slot antenna is designed with high active device density. The natural coupling of the microstrip and slotline is exploited for p

An internally tuned Ku-Band monolithic predistortion lineariser S Torrents, J Baucells, J Martinez. Mier Comunicaciones S.A. Pol. Industrial Congost, Pare. 4-S 08530 LA GARRIGA Barcelona (Spain). Tel. 34 3 8717500 Fax. 34 3 8717200 Abstract A fully integrated predistortion lineariser has been designed, manufactured and tested, using monolithic technology. Results show the possibility of linearisi

Highly-integrated three-dimensional MMIC 20-GHz single chip receiver KeDjiro Nishikawa, Kenji Kamogawa Tsuneo Tokumitsu, Masayoshi Aikawa *Makoto Hirano and Suehiro Sugitani. NIT Wireless Systems Laboratories 1-2356 Take, Yokosuka-shi, 238-03 Japan. Tel: +81-468-59-3464 Fax: +81-468-59-4254 E-mail: nisikawa-mhosun.wslab.nttjp *NTT LSI Laboratories 3-1 Morinosato Wakamiya, Atsugi-shi, 243-01 Japan.

A monolithic MESFET transimpedance amplifier using active inductors Franco Giannini, Ernesto Limiti and Giancarlo Orengo. Dipartimento di Ingegneria Elettronica, Universita di Roma "Tor Vergata" Via della Ricerca Scientifica, 00133, Roma, ITALY. Abstract A transimpedance amplifier realised in 0.5 µm GaAs MESFET monolithic technology has been designed using the Alenia foundry process. The amplifier