BRANCH-LINE HYBRID-RINGS WITH COUPLED-LINES Tatsuo Itohttt Iwata Sakagamit, Takatugu Munehirot,Hiroyuki Tanakatt,and ABSTRACT A branch-line hybrid-ring is composed of four quarter-wavelengthtransmission lines, and hence occupies a large area on printed circuit boards because of its loop structure. In this paper, a branchline hybrid-ring which includes microwave C sections is proposed for siz

FULL-W AVE ANALYSIS OF A NOVEL BRANCH-LINE SERIES JUNCTIONS BETWEEN LINES Chung- Yi Lee and Tafsuo Itoh '. COUPLER WITH D~partment of Electrical Engineering, University of California, Los Angeles 405 Hilgard Avenue, Los Angeles, CA 90024, U.S.A. A{JSTE;ACT A novel two-branch coupler with series junctions between microstriplines and slotlines has been synthesized first by using the even-odd mode

RING OF FOUR OVERLAPPED MICROSTRIP HYBRID COUPLERS Wojciech Marczewski 1 Tadeusz Morawski 2 1) Space Research Center, Polish Academy of Sciences, oa-716 Warsaw, ul Bartycka 18A, Poland tel.48-22-403766, fax.48-39-121273, Email: CB~-CBK.WAW.PL (internet) 2) Institute of Radio Electronics, Warsaw University of Technology, 00-665 Warsaw, ul.Nowowiejska 16/19, Poland, tel.48-22-253929, Email: MSW

New Small Size,Wideband 1800 Ring Couplers: Theory and Experiment M.-H. Murgulescu,~. Legaud, E. Moisan, E. Penard, M. Goloubkoff France Telecom, CNET LAB/RSf)/ESD, Route de Tregastel, BP 40,22301 Lannion Cedex, France Phohe:33-96053825 Fax: 33-96051008 1. Zaquine Institut National des Telecommunications, DEC, 9 rue Charles Fourier, 91011 Evry Cedex, France Phone: 331-60764610 'Fax: 331-60764431

A New 140 GHz Planar Diode Finline Mixer for Radiometer Applications M. Bobeiml, L.-P. Schmidtl, J. Ritter2, v. Bl'IDkovic2, R. Beyer2, F. Amdt2, u. Klein3, K. Kiinzi3, G. Schwaab3 and T. w. Crowe" IDeutsche Aerospace Sedanstr. 10, D-89070 U1m,Germany, . Phone +49 731392 4180, Fax. +49 731392 3362 2Univetsity of Bremen, Microwave QePartment, 3University of Bremen, Department of Remote Sensing, Ku

An Integrated 11GHz Cryogenic Downconverter W A Phillips, D Jedamzik, K Lamacraft and S Zammattio GEC Hirst Research Centre, Borehamwood WD6 1RX R B Greed, S J Hedges, P R Whitehead and B F Nicholson GEC Marconi Research, Great Baddow, Chelmsford, CM2 8HN T W Button +, N MeN Alford ICI Superconductors, Billingham, TS23 1PS N Peters, J Grier Hymatic Engineering, Redditch B98 9HJ Abstract A cryogen

8-12GHz veo with SiGe Heterojunction Bipolar Transistor A. Gruhle, H. Kibbel *, R. Speck Dornier, D-88039 Friedrichshafen, Germany *Daimler Benz Research Center, D-89013 Ulm, Germany A hybrid 8-12 GHz VCO has been built using a SiGe heterojunction bipolar transistor (HBT) in common-emitter-configuration. In order to achieve the wide frequency range only lumped elements were used. Transistors and v

',' ,~ ':'" ~ " . . VeryLow~.Inte~modulation . ..": .(~.;. (JaAS;Mixers~ ,. ,~ witl1Negativ~ Feedback' ~ 't;. , Kiyplnitsu Onodera'imdMasahirq"~uragu"chi* . N1TLSl Laboratories' 3,.1 Morinosato-:Wakaroiya, Atsugi, KanagaWa 2,.43-:01, apan J *N1T Radio Communication Systems Laboratories 1~2356 Take, Yokosuka, Kanagawa 283-03, Japan "', ABSTRACT A novel circuit configuration for GaAs FET m

Detlev Hollmann, Guido Baumann, Roland Heilig Alcatel SEL AG, Mannheimer Strasse, 22b, 13-75179 Pforzheim, Germany . ,', . /'.'; , ,d ABSTRACT Nonlinear circuits including oscillators, frequency doublers and mixers were designed and fabricated in coplanar waveguide technology. For the design commercial CAD software was used with an implemented in-house nonlinear MODFET model for the active device