A Wideband High-Gain Beam-Steering Antenna Composed of a BOR Element and Parasitic Mushroom-Shaped Elements

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  • BOR素子及びマッシュルーム形寄生素子から成る広帯域・高利得ビーム走査アンテナ

Abstract

This paper proposes a wideband high-gain beam-steering antenna composed of a feeding body of revolution (BOR) element and parasitic mushroom-shaped elements (MushPE) surrounding the feeding BOR element. The BOR element radiates an omnidirectional beam in the azimuth plane. This omnidirectional beam is transformed into a high-gain directional beam when some MushPEs are open-circuited with respect to the ground plane and the remaining MushPEs are short-circuited. It is found that a gain of more than 10 dBi and a VSWR of less than two are obtained across a 36% frequency bandwidth. Measurement using a fabricated antenna confirms the simulation results.

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