Improved microwave properties of the YBa2Cu30,-x superconducting films on large-area sapphire substrates A G Zaitsev, R Wordenweber, R Kutzner and Th Konigs* C Zuccaro and N Klein** *Institut fUr Schicht, und Ionentechnik, Forschungszentrum Jillich, D-52425 Jillich, Germany. **Institut filr Festkorperforschung, Forschungszentrum Jillich, D-52425 Jillich, Germany. Abstract YBa2Cu3O7-X (YBCO) thin f

Electric field investigations microwave circuits Yingjie Gao and Ingo Wolff Department of Electrical Engineering, Gerhard Mercator University Duisburg, Bismarckstr. 81, D-47057 Duisburg, Germany Abstract The aim of this experimental investigation is to measure the electric near field inside of active microwave circuits. An electric field probe which is applicable in the 1 to 20 GHz range has been

A 40GHz large-signal double-reflectometer waveform measurement system designed for load-pull applications F van Raay and G Kompa. Fachgebiet Hochfrequenztechnik, University of Kassel, Wilhelmshoher Allee 73, D-34121 Kassel, Germany. Tel: +49-561-804-6535 Fax: +49-561-804-6529 Abstract A new large-signal measurement system combining waveform and load-pull characterization is presented. The setup co

A full wave fast and efficient tool for mm-wave coupled lines simulation .. M Massenzio ., A Laratta *now with Hewlett Packard, Components Marketing Operation, Pinewood, Nine Mile Ride, Wokingham, Berks RG40 3LL (UK) **Univ. of Rome "La sapienza", Dept of Electronics, v. Eudossiana, 18 - 00184 Rome, Italy Abstract We applied the Spectral Domain Analysis to the simulation of an arbitrary multilaye

Some results obtained in sensitivity analysis of microwave circuits F Vallette, G Vasilescu, Member IEEE and G Alquie, Member IEEE. L.E.A.M., Tour 13/2, Boite 203, Universite Pierre & Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05. Tel: (33) 1 44.27.43.72 Fax: (33) 1 44.27.48.37 email: fxv-ufr924.jussieu.fr Abstract Sensitivities computation is an essential step in microwave circuit design, b

Design of a rapid convergence generalized sidelobe canceler and effect of the introduction of real antenna and pointing accuracy vector errors Manuel Sierra Daniel Segovia* Departamento de Senales, Sistemas y Radiocomunicaciones, E. T. S.I. T., Universidad Politecnica de Madrid, Ciudad Universitaria sn, 28040 Madrid. Telephone (91)5495700(ext 397) fax 5432002 *E.T.S.I.T., Universidad de Valladoli

A compact L band feed for a multifrequency cassegrain radio telescope N Roddis and G J Kitching Nuffield Radio Astronomy Laboratories, Jodrell Bank, UK Abstract A compact L band antenna feed system is needed for use on 25m cassegrain radio telescopes. A horn fed lens antenna has been designed using CAD, and a scale model constructed. A mounting and positioning system has been devised for the full-



Electromagnetic analysis of exponentially tapered coplanar stripline antennas used in coherent microwave transient spectroscopy. technique Valerie Bertrand, Michele and Bernard Jecko Lalande, Institut de Recherche en Communications Optiques et Microondes, CNRS - URA n° 356, IRCOM Limoges, 123 avenue Albert Thomas, 87065 Limoges (France) Abstract - (ETCS) antennas used for the materialcharacterisa

Separate phased feeds for correcting spherical aberration GaUna N Lebedeva Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region, 141700, Russia Abstract Requirements for a radiation pattern of a spherical reflecting antenna determine a permissible phase error over the illuminated aperture. In order to extend an illuminated range of the aperture plane with a permissible phase erro