This Letter describes a U‐shaped aperture‐coupled U‐slot triangular patch antenna fed by microstrip feed line. Because a thick aperture substrate with a dual U‐slot patch radiator are used in the design, a high level of coupling to the feed line results. The measured bandwidth of approximately 84.9% (VSWR ≤ 2.0) and a gain of 6.5 dBi have been obtained. The experimental far‐field patterns are stable across the passband.
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Yong‐Woong Jang (2002) studied this question.
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