Power conservation for reflector antennas with truncated feed patterns

Details Power conservation for reflector antennas with truncated feed patterns Power conservation for reflector antennas with truncated feed patterns

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ell....12..130r&link_type=abstract

Electronics Letters, vol. 12, Mar. 18, 1976, p. 130, 131.

Physics

Optics

Antenna Feeds, Antenna Radiation Patterns, Energy Conservation, Parabolic Reflectors, Reflector Antennas, Electromagnetic Scattering, Far Fields, Spherical Waves

Scientific paper

Reflector-antenna calculations using idealised truncated feed patterns can lead to incorrect values of total secondary radiated power. It is demonstrated that this discrepancy is due to the presence of higher-order spherical modes incident on the reflector. When a proper spherical-wave expansion of the incident field is used, in conjunction with the physical-optics technique, to determine the scattered field, the total power of the scattered field will equal the power radiated by the feed.

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