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Elimination of scan impedance anomalies in ultra-wide band phased arrays of differentially fed tapered slot antenna elements

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5 Author(s)
Garcia, E. ; Dipt. Teor. de Senal y Comun., Univ. Carlos III de Madrid, Madrid ; de Lera, E. ; Segovia, D. ; Gonzalez, V.
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Scan impedance anomalies are associated to phased arrays. There are different phenomena in order to explain these scan blindnesses produced when the array scans at one frequency and one angle. The most popular technique for eliminating these scan blindnesses is based on the use of electric walls in the grid of the two dimensional array. In this paper we present a dual polarized ultra-wide band array based on dasiabunny earspsila antennas from 0.3 GHz to 1 GHz which presents scan blindness. We analyze the cause of the anomaly and present a technique non based on electric walls in order to avoid the scan blindness with a small increase in the noise figure of the array.

Published in:

Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE

Date of Conference:

5-11 July 2008

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