C. G. Ryan, J. Bray, Y. Antar, M. R. Chaharmir, J. Shaker, A. Ittipiboon
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A broadband transmitarray using double square ring elements
Dual-resonant double square ring elements are applied to the design of a four-layer transmitarray operating at 30 GHz. The design procedure is described and results of a 7.5% −1 dB gain bandwidth and 47% radiation efficiency are reported.