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An Eigen-Analysis of Compact Antenna Arrays and Its Application to Port Decoupling

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5 Author(s)
Volmer, C. ; Tech. Univ. Ilmenau, Ilmenau ; Weber, J. ; Stephan, R. ; Blau, K.
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Placing the radiators of antenna arrays closer than aggravates the problem of power mismatch. Based on efficiency considerations, a general analysis of this effect is presented, putting forward a simple tool to quantify, compare, and optimize the performance of antenna arrays. This analysis is not restricted with respect to the number of radiators or the degree of compactness. In order to improve power matching, a systematic approach for the design of lossless decoupling and matching networks based on 180 directional couplers is suggested for up to eight radiators. Implications of network losses, which have not yet received appropriate attention by researchers in the past, will be analyzed and discussed by means of a manufactured three-element prototype array.

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Antennas and Propagation, IEEE Transactions on  (Volume:56 ,  Issue: 2 )