Absorption Efficiency of Receiving Antennas

Jørgen Bach Andersen, Aksel Frandsen

Research output: Contribution to journalJournal articleResearchpeer-review

78 Citations (Scopus)
2855 Downloads (Pure)

Abstract

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%.
Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
Volume53
Issue number9
Pages (from-to)2843-2849
Number of pages6
ISSN0018-926X
Publication statusPublished - 2005

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