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Ultrawideband superstrate-enhanced substrate-loaded array with integrated feed

Published in:
IEEE Trans. Antennas Propag., Vol. 61, No. 11, November 2013, pp. 5802-7.
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Summary

A superstrate-enhanced substrate-loaded array (SESLA) with an integrated feed is presented. The design allows for a practical implementation of the SESLA, a concept previously presented by the authors for realizing extremely wideband (> 10 : 1) low-profile arrays. Specifically, the feed provides unbalanced to balanced transformation allowing the balance-fed SESLA to be excited with a 50 omega unbalanced line. The resulting array/feed combination is matched across a 13.9 : 1 bandwidth (infinite array, V SW R less than or equal to 2.4). When scanned to 45 degrees in the E-, H-, and D-planes, the unit cell operates across a 13.3 : 1 bandwidth using a relaxed matching criterion of V SW R less than or equal to 3. The design is validated through extensive measurement of an 8x8 prototype array.
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Summary

A superstrate-enhanced substrate-loaded array (SESLA) with an integrated feed is presented. The design allows for a practical implementation of the SESLA, a concept previously presented by the authors for realizing extremely wideband (> 10 : 1) low-profile arrays. Specifically, the feed provides unbalanced to balanced transformation allowing the balance-fed SESLA...

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