Surface wave excitation of a dieletric slab by a Yagi-Uda slot array antenna Alfred Richard Tatsuo Itoh Perkons and Electrical Engineering Department, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90024 Abstract This paper presents a microstrip fed Yagi-Uda slot array antenna as a new method of surface wave excitation in a dielectric slab. Construction of the antenna

Characterisation of building reflection and scatter of microwaves using FresnelKirchhoff diffraction theory M S Ding and M 0 Al-Nuaimi University of Glamorgan, UK Abstract: Fresnel- Kirchhoff diffraction theory, in essence physical optics, has been used to predict building reflection and scatter Bramely and Cherry (1) and Noerpel (2). Its strength in near and very near fields was clearly demonstra

A method for design shaped reflector antennas by optimization techniques using Hermite patches Marcos Arias A. Antonio G. Pino Dept. Tecnologias de las Comunicaciones, E.T.S.!. Telecomunicaci6n, Universidad de Vigo, Campus Universitario. 36200 Vigo. SPAIN Tel.: +34 86 812120 Fax: +34 86 812116 E-mail: marias-tsc.uvigo.es Abstract A new optimization technique to shape a reflector antenna surface is

Eigenvalue mode confirmation in a mutually coupled active antenna chain array D E J Humphrey, V F Fusco High Frequency Electronics Laboratory, Department of Electrical and Electronic Engineering, The Queen's University of Belfast, Ashby Buildings, Stranmillis Road, Belfast, BT9 5AH, N. Ireland, United Kingdom. Tel: +44 (0)1232 245133 Fax: +44 (0)1232 667023 Abstract -- Arrays of coupled active an

A large planar antenna consisting of an . array of waveguIde fed horns . Tomas Sehm, Arto Lehto, Antti Raisanen Helsinki University of Technology, Radio Laboratory, FIN-02IS0 Espoo, Finland Abstract A planar array antenna in which box horns are used as radiating elements is proposed. The antenna consists of two parts, one containing the feed network and the other 256 radiating elements. The radia

Fast SDMA-algorithm patch-antenna arrays G Gottwald *, F Rostan, W Wiesbeck** * Richard Hirschmann GmbH & Co, Mobile Communication, Stuttgarter Str. 45-51, 72654 Neckartenzlingen, P.O.Box 1649 Telephone: +497127/14-1304 Telefax: +497127/14-1450) * * Institut filr Hochstfrequenztechnik und Elektronik, University of Karlsruhe, Kaiserstr. 12, 76128 Karlsruhe, Germany Telephone: +49 721/608-2525 Telef

Coplanar branch-line and rat-race couplers for W-band applications L Verweyen, W H Haydl, A Tessmann, H Massier, T Krems, Jo. Schneider Fraunhofer Institute for Applied Solid State Physics (IAF), Tullastr.72, 79108 Freiburg, Gennany phone: +49-761-51 59446 fax: +49-761-51 59565 e-mail: verweyen-iaf.fl1g.de Abstract In this paper, we report on coplanar branch-line and ratrace couplers on GaAs for u

Modelling of coplanar waveguide elements for 77 -GHz - MMICs J. Gerdes, F.-J. Schmiickle, C. Rheinfelder, W. Heinrich Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik, Berlin, Rudower Chaussee 5, D-12489 Berlin, Germany Abstract Efficient models for coplanar waveguide (CPW) discontinuities 'and junctions on Si substrate have been developed, which are suitable for W-band MMIC design. The model

A Monolithic 60GHz power amplifier with feedback stabilization Joao Caldinhas Vaz, F. Fortes, J. Cos~a Freire Instituto de TelecomUflica($oes, Instituto Superior Tecnico, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal Abstract For personal communication systems, the highest possible integration into monolithic technology of all RF functions are desirable. For future mobile communication systems, on

Microstrip and coplanar SiGe-MMIC oscillators F. Beisswanger, u. Giittich, c. Rheinfelder F. Beisswanger* is with Daimler-BenzAG, Forschungszentrum VIm, Wilhelm-Runge Strasse 11, 89081 VIm, Germany V. Guttich is with Deutsche Aerospace AG, Worthstrasse 85, 89077 VIm, Germany C. Rheinfelder is with Ferdinand-Braun-Institut fur Hochstfrequenztechnik Berlin, Rudower Chaussee 5, 12489 Berlin, Germany