Absorption efficiency of receiving antennas

A receiving antenna with a matched load will always scatter some power. This paper sets an upper and a lower bound on the absorption efficiency (absorbed power over sum of absorbed and scattered powers), which lies between 0 and 100% depending on the directivities of the antenna and scatter patterns...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2005-09, Vol.53 (9), p.2843-289
Hauptverfasser: Andersen, J.B., Frandsen, A.
Format: Artikel
Sprache:eng
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Beschreibung
Zusammenfassung:A receiving antenna with a matched load will always scatter some power. This paper sets an upper and a lower bound on the absorption efficiency (absorbed power over sum of absorbed and scattered powers), which lies between 0 and 100% depending on the directivities of the antenna and scatter patterns. It can approach 100% as closely as desired, although in practice this may not be an attractive solution. An example with a small endfire array of dipoles shows an efficiency of 93%. Several examples of small conical horn antennas are also given, and they all have absorption efficiencies less than 50%.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2005.854532