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This paper proposes a small CRPA array with frequency-insensitive properties. The array consists of seven elements, and each element is composed of upper and lower circular loops that are designed to resonate at 1.575 GHz and 1.227 GHz, respectively. The lower loop is fed by the hybrid chip coupler, and the upper loop is electromagnetically coupled for a frequency-insensitive feeding mechanism. Due...
This paper proposes the optimum array configuration that improves the null steering performance for controlled reception pattern antenna (CRPA) systems. The proposed array is composed of a center reference element and six auxiliary elements, and its array pattern is adaptively steered to mitigate the interference effect in conjunction with a constraint least-mean-square (LMS) algorithm. Then, the...
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