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Coplanar waveguide elements for a European CAD environment
Coplanar waveguide . environment R. Kulke and Th. Sporkmannl elements for a European CAD 'The authors are with the "Institut fur Mobil~ und Satellitenfunktechnik", Moerser StroBe 316, D~4132 Kamp~Lintfort, Germany Abstract One part of the ESPRIT project "CLASSIC"is the application of a three dimensional finite-difference frequency domain calculation to coplanar waveguide elements for commercial
Full-wave equivalent circuit of via-hole grounds in microstrip
Full-wave equivalent . . mlcrostrlp G. Cerri*, M. Mongiardol\, T. Rozzi* circuit of via-hole grounds in * Diportimento di Elettronica ed Automatica, Universito degli Studi di Ancona, via Breece Bianche, 60131 Ancona, Italy 1\ Istituto di Elettronica, Universito di Perugia, 1-06100 Perugia, Italy Abstract From a rigorous study of diffraction by a via-hole modeled as a metal post in open microstr
Second harmonic uniplanar active integrated antenna array with strong coupling
Second harmonic uniplanar active integrated array with strong coupling Shigeo Kawasaki. and Tatsuo Itoh+ * 3rd Research Center, Technical Research & Development Institute Japan Defense Agency 1-2-10 Sakae Tachikawa, Tokyo 190, Japan +Department of Electrical Engineering, University of California, Los Angeles 405 Hilgard Avenue, Los Angeles, CA 90024, USA Abstract In this paper, a new technique to
Analysis of open-end slot-line for examining radiation mechanisms of constant width and tapered slot antennas
Analysis of open-end slot-line for examining radiation mechanisms of constant width and tapered slot antennas D. Mirshekar-Syahkal and W. K. Ofosu Dept. of ElectronicSystems Engineering, Universityof Essex, Colchester, Essex C04 3SQ, UK Abstract Constant width and tapered slot antennas have been generally categorised as travelling-wave antennas without referring to their exact radiation mechanisms
Aperture admittance and matching technique of dielectric filled waveguide antennas
Aperture admittance and matching technique of dielectric filled waveguide antennas M. Tian, D.P. Tran, L.P. Ligthart Laboratory of Telecommunicationand Remote Sensing Technology DelftUniversityof Technology PO Box 5031 , 2600 GA Delft,The Netherlands Tel.: (015) 786256; FAX (0151 784046 Abstract A mathematical model for the aperture admittance along with an aperture matching technique are given f
An array-fed reconfigurable reflector for flexible coverage
An array-fed reconfigurable coverage P.J.B. Clarricoats*, A.D. Monk* and Zhou Hai+ *Queen Mary & Wes~ield College, Universify of London, United Kingdom +South Bank Universify, London, United Kingdom reflector for flexible Abstract The paper describes a new type of reconfigurable reflector antenna for spacecraft applications in which both the reflector shape and the excitation of a small array fe
Highly shaped satellite antenna for constant flux illumination of the earth from low orbits.
Highly shaped satellite antenna for constant flux illumination of the earth from low orbits. H. Roth, Th. Beez ANT Nachrichtentechnik GmbH, Gerberstr.33, 71522 Tel:+49 7191133596, Fax: +49 7191132603 Backnang, FRG Abstract The paper concerns with the design and measurement of a highly shaped, circularly polarized X-band antenna for working on an environmental satellite in a low polar orbit (about
Nonlinear behavior of NbN and YBa2 Cu3 07-x superconductive films at microwaves.
Nonlinear behavior of NbN and YBa2Cu307-x superconductive films at microwaves. A.B. Kozyrev, T.B. Samoilova, S.Yu. Shaferova Department of Electronics, St.-Petersburg Electrotechnical Prof. Popava str. 5, 197376, St.-Petersburg, Russia. TEL.: +(812) 234-20-46; FAX: +(812) 234-99-83; E-MAIL: borisk@sovamsu.sovusa.com. University, Abstract Some results of an investigation of nonlinear behavior of N
Application of high Tc superconductors to microwave
Application of high Tc superconductors J.C. Mage, B. Marcilhac, M. Mercandalli, Y. Lemaitre, B. Dessertenne, D. Mansart, J.P. Castera, P. Hartemann Thomson- CSF/LCR, F91404 ORSAYFrance TEL.:33 1 60197983; FAX:33 1 601971 20 to microwave Abstract During the last fNe years, the surface resistance Rs(1O GHz, 77 K) ofYBCO thin filmshas decreased froma value ofabout 10to 20 milliohms- Le.the same as
Performance of hybrid HTS filter/GaAs low noise amplifier and microwave characterization of YBCO HTS resonators on R-plane sapphire
Performance of hybrid HTS filter/GaAs low noise amplifier and microwave characterization of YBCO HTS resonators on R-plane sapphire 5.5. Toncich*, F.A. Miranda, K.B. Bhasin, T.J. Kascak National Aeronautics and Space Administration, Lewis Research Center,Cleveland,OH. 44135, USA at Corporation,Solon,OH 44139, USA * Presently Bird Electronic Abstract Research efforts are underway at NASA-Lewis in