Antenna Calibration Using the 3-Antenna Method with the In-Phase Synthetic Method

Katsumi FUJII  Yukio YAMANAKA  Kunimasa KOIKE  Akira SUGIURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E93-B   No.8   pp.2158-2164
Publication Date: 2010/08/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Compatibility(EMC)
Keyword: 
antenna calibration,  three-antenna method,  in-phase synthetic method,  actual gain,  mutual impedance,  

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Summary: 
The use of the in-phase synthetic method is proposed for antenna calibration using the three-antenna method (TAM) in order to make the TAM applicable even in a semi-anechoic chamber (SAC) or on an open-area test site. Suitable antenna arrangements are theoretically investigated for this improved calibration method. Experimental analyses demonstrate that the in-phase synthetic method can remarkably reduce unwanted effects of the ground-reflected wave. Therefore, even on a metal ground plane, the proposed TAM with the in-phase synthetic method can yield an accurate actual gain of a double ridged guide antenna at frequencies from 4 GHz to 14 GHz with differences of +0.16/-0.37 dB from the results of the conventional TAM performed in an fully anechoic room (FAR).