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Título: MOM ANALYSIS OF A REFLECTOR ANTENNA DESIGN FOR OMNIDIRECTIONAL COVERAGE
Instituição: ---
Autor(es): JOSE RICARDO BERGMANN
FLAVIO JOSE VIEIRA HASSELMANN
MARCOS GUIMARAES CASTELLO BRANCO
Colaborador(es): ---
Catalogação: 16 11:10:20.000000/12/2013
Tipo: PAPER Idioma(s): ENGLISH - UNITED STATES
Nota:
© 2002 IEEE. Reprinted, with permission, from IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOL. 4, 2002. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Pontifícia Universidade Catolica do Rio de Janeiro’s. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubspermissions@ ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
Referência [en]: https://www.maxwell.vrac.puc-rio.br/eletricaonline/serieConsulta.php?strSecao=resultado&nrSeq=22395@2
Resumo:
Radio base stations for point-to-multipoint communications usually employ arrays of antennas at a certain height from the ground for omnidirectional coverage, with element excitations being exercised in order to achieve a suitable elevation pattern synthesis. More recently, attention has been focused on point-to-multipoint (not necessarily mobile ones, but fixed as well) services such as broadband wireless (high-density fixed) systems for which compact shaped reflector antennas comprise an interesting alternative to usual base station arrays due to their ability in providing customized coverage patterns, with bandwidth requirements now being met via adequate feed designs. Prospective reflector designs, while producing cosecant squared-like power patterns in the vertical plane to account for free space attenuation, should also concentrate radiated energy bellow the horizon line for reduced interference. One such configuration, explored in [1], involved a nodal station comprising up to four shaped offset reflector antennas for quadrant sectors coverage, with substantial design effort aimed at properly modeling the reflector surfaces [2]. Alternatively, a compact configuration employing a single circularly symmetrical shaped reflector surface fed by an axial horn, has been investigated in [3]. A specific design of the latter configuration is further explored herein with a view towards evidencing the benefit of a strictly numerical analysis fool such as the Method of Moments (MOM) for both reflector and feed structures, as compared to the more conventional optical (geometrical and physical) route.
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