This paper presents a method of introducing novel bar shaped multiple patches to enhance the gain of the often-ignored North Atlantic Treaty Organization (NATO) radio frequencies E-band, that is from 2–3 GHz while maintaining high gain through the entire bandwidth of the antenna. The patches are introduced in the vicinity of the antenna flares. The length of the patches increases subsequently in the end fire direction to cater for different frequency fields. This approach improves the gain and directivity by field coupling, without getting a tradeoff with the absolute bandwidth of the antenna. This new antenna prototype has dimensions of 100 mm × 90 mm × 1.5 mm with measured gain from 3.8–7.8 dBi from 2–10 GHz and for NATO E-band the gain ranges from 3.8–5 dBi which is better than the previous designs with respective antenna size.
Hadee et al. (Sun,) studied this question.
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