A novel compact H‐plane horn antenna constructed is proposed for substrate integrated rectangular waveguide with ξr = 10.2. It has a dielectric arc lens for better directivity and a simple microstrip transition as feed. The horn, the lens, and the transition share the same substrate. The measured gain of this antenna is about 9 dB; the bandwidth, at 10 dB return loss, is over 12%, and the antenna size is 39.175 × 14 × 2 mm3. The frequency band is 25.5–28.5 GHz.
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Che et al. (2006) studied this question.
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