MULTI-MODE ANALYSIS OF A TWO COAXIAL CUP PRIME FOCUS FEED WITH AN INFINITE FLANGE

Autor:	C. J. Papathomas, R. E. Collin
Rok vydání:	1989
Předmět:	Physics Radiation business.industry Bandwidth (signal processing) Flange Circular waveguide Radiation properties Electronic Optical and Magnetic Materials Optics Antenna feed Electrical and Electronic Engineering Coaxial business
Zdroj:	Electromagnetics. 9:281-311
ISSN:	1532-527X 0272-6343
DOI:	10.1080/02726348908915240
Popis:	The circular waveguide antenna feed with multiple coaxial cups is analyzed using the method of moments. The radiation properties of this type of prime focus feed are examined with particular emphasis on the level of cross-polarized radiation. It is demonstrated that by optimizing the feed dimensions the cross-polarization can be maintained below − 27 dB over a 20% bandwidth for a feed with a single coaxial cup. By examining the effects of various numbers of modes used to approximate the aperture fields it is concluded that quite accurate results can be obtained by including only the TE11 and TM11 modes in each aperture region.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fbed6a4fb0cf17f92eb03b96861f9433 https://doi.org/10.1080/02726348908915240 Zobrazit plný text záznamu