Low‐profile wideband Fabry‐Perot resonator antenna using artificial magnetic conductor surface

Abstract

A low‐profile, high gain Fabry‐Perot Resonator antenna with a wide operation bandwidth (BW) is presented in this paper. The proposed design consists of an ellipse‐shaped dipole as a wideband radiating source, which is reflected by an artificial magnetic conductor ground plane to achieve low‐profile structure. The antenna gain can be significantly enhanced by the use of a half‐wavelength‐thick dielectric slab as a partial reflecting surface. Additionally, this dielectric slab also contributes to improving the radiation pattern characteristics of the proposed design, especially in the high frequency region. A final prototype with an overall size of 1.2λ L × 1.2λ L × 0.4λ L (λ L is free‐space wavelength at the lowest frequency of 3‐dB gain BW) has been fabricated to validate the concept. The measured results show that the proposed antenna yielded a wide 3‐dB gain BW of approximately 50.3% with a peak gain of 14 dBi and impedance matching BW of 48.9%.