A wideband single layer triangular patch antenna fed by an L-shaped probe is proposed. It achieves 42% impedance bandwidth (SWR ≤ 2) and a maximum gain of 6 dBi. A foam layer of thickness ~ 10% of the operating wavelength is used as the supporting substrate. The radiation pattern is stable across the passband.
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Mak et al. (1999) studied this question.
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