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Analysis of mutual coupling between a finite phased array of dipoles and its feed network

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2 Author(s)
Kuan Min Lee ; Hughes Aircraft Co., Fullerton, CA, USA ; Ruey-Shi Chu

The mutual coupling effects between a finite phased array of dipoles and its feed network are analyzed. The feed network is typically a corporate feed consisting of split-tee power dividers cascading to form a certain power distribution over the aperture. A simple iterative approach is used to solve the interaction between elements and feed. The radiation of a finite dipole array are first found for a given voltage excitation. These radiation impedances are then used as loads for the feed network, and the n+1 port network problem is analyzed. Due to the interaction between the feed network and dipoles, the antenna parameters such as mismatch, antenna pattern, and gain are all affected. These effects can be determined from the analysis of the network representation. Numerical results for a typical phased array with a corporate feed show that the resultant VSWR of the feed pattern degradation is due to the mutual coupling effects.<>

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:36 ,  Issue: 12 )

Date of Publication:

Dec. 1988

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