Abstract
A compact sequential rotation array antenna for satellite applications is presented in this paper. The antenna consists of a main body with four radiation elements driven by a feeding network. The radiation elements are sequentially rotated planar inverted-F antenna (PIFAs) and four ports with equal magnitude and sequentially 90-degrees phase difference drive the main body. In particular, by bending the horizontal radiation plane, the structure is compact with a small size (φ0.21λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.09λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> ). Due to sequential rotation structure, the antenna pattern has good symmetrical property. The antenna proposed in this paper has a 3-dB axle ratio (AR) beamwidth of 185 degrees and a half-power beamwidth of 119 degrees.
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