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Butler submatrix feed systems for antenna arrays

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1 Author(s)
B. Sheleg ; Naval Research Laboratory, Washington, DC, USA

Several small order Butler matrices may be interconnected to replace a single large Butler matrix normally employed in beam forming and scanning networks for linear and circular arrays. This permits reduction in the size of the feed system resulting in a saving of system components and hardware. The penalty is an increase in the beamwidth for circular arrays and a reduction in the number of beams for linear arrays. The submatrix feed system has the additional advantage that it can be used to excite arrays with N elements ( N \neq 2^{n} ), which normally cannot be fed by a single Butler matrix.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:21 ,  Issue: 2 )