Artificial dielectric lens antennas: Assessment potential for space applications c. Abella(*), M. Marin(*), J. Vazquez(*), J. Peces(*), J. A. Romera(**), R. Graham(+), G. Crone(+), R. Garcia(+) (*) IRSA, Arroyofresno Tel: +34.1.373.12.50; (**): RYMSA, (+) ESA/ESTEC 19, 28035 Madrid; Fax +34.1.373.71.13 of their Abstract This paper describes the results of an ongoing study on artificial dielectri

Analysis and synthesis lenses c. Abella(*), J. Vazquez(*), M. Marin(*), J. Peces(*), R. Graham(+), G. Crone(+) (*): IRSA, Arroyofresno 19, 28035 Madrid; Phone: +34.1 373.12.50; Fax +34.1.373.71.13 (+) ESA/ESTEC of planar non-homogeneous Abstract This paper describes the theoretical tools developed for an ESAsponsored study of planar, nonhomogeneous dielectric lenses. These include synthesis and

Satellite borne multibeam antenna for 21 GHz band regional satellite broadcasting Aiichiro Tsuzuku{*), Hajime Fukuchi{*) Hiroki Shoki{**), Teruaki Orikasa{**) and Chiharu Ohuchi(***) * Communications Research Laboratory, 4-2-1 Nukuikita-machi, japan Koganei-shi, * * Tokyo 184, Toshiba Corporation, Kanagawa 21O, japan Hamamatu-cho, * ** 1, Komukai-Toshiba, Saiwai, Kawasaki, National Space De

Optimized planar array antenna nulling with phase only control F.R. Castella, D.L. Marable laurel, The Johns Hopkins University Applied Physics laboratory, Maryland USA FAX: 1 301 953 6141 Abstract A new theoretical method is derived by which a planar array antenna can provide maximum antenna gain in a specified pointing or look direction while simultaneously imposing J nulls in J directions. Th

Performance of a prototype multibeam antenna capable of accessing satellites on inclined orbits M.A. 5prey, r.5. Bird and 5.J. Barker CSIRO Division of Radiophysics, PO Box 76, Epping, NSW 2121, Australia. Phone: 612 372 4222; Fax: 612 372 4446 e-mail: msprey-rp.csiro.au Abstract A multibeam antenna capable of simultaneous satellite operation over a 20° segment of the geostationary are, including

Design of planar arrays for obtaining efficient footprint patterns with an arbitrary boundary F.Ares., Prof. R. S. Elliott" and Prof E. Moreno. Departamento de Fisico Aplicada, Facultad de Fisico, * Universidad de Santiago de Compostela, 15706 Santiago de Compostela, Spain. Fax: (34) 81520676, Tel.: (34) 81563100, Ext.2171. * * Department of Electrical Engineering, University of Californio, LosAn

Relaxation of mechanical tolerances in phase retrieval antenna metrology A Tennant, G Junkin and A P Anderson Department of Electronic and Electrical Engineering, The University of Sheffield, Mappin Street, Sheffield S 1 3JD, UK Tel +44742768555; Fax: +44742726391 Abstract The sensitivity of phase retrieval antenna near-field/far-field predictions to scanning errors is investigated. It is shown

Arbitrary wave synthesis transformations M. Baquero, M. Ferrando, G. Escobar, A. Navarro, P. Pastor, E. Selfa Departamento ComunicacionesUPV, Camino de Vera sin, de 46071-Valencia (Spain) Telephone and Fox: 346 3877300, 3463877309 using spectral Abstract The different transformations among plane, cylindrical and spherical spectrum allow to tackle the arbitrary field synthesis from a set of known

Armored phased array design J. Dayton Adams, B. Keith Edenfield, E. Arch Nelson, John C. Handley, and Bradley S. Newton Georgia Institute of Technology, GTRI/MA.TD, Atlanta, Georgia, USA 30332-0800 Abstract The Georgia Tech Research Institute (GTRI) has performed modeling, analysis, and testing of array face armoring as a survivability enhancement feature for a forward acquisition radar. This pa

Low cost system for phase noise measurements microwave oscillators. Andrzej Lozowski Microwave Devices Division,Instituteof Microelectronics and Optoelectronics Warsaw Universityof Technology, Nowowieiska 15/19, 00-665 Warsaw, Poland of Abstract Every phase noise measuring system ends in very sensitive low frequency spectrum analyser. It is rather rarely met in a microwave laboratory. Here a che