Wideband Low-profile AMC-based Patch Antenna for 5G Antenna-in-package Application

A wideband low-profile AMC-based patch antenna is proposed in this paper. The novel antenna is composed of a center patch and finite sized AMC cells with microstrip line or embedded strip line methods. The antenna-in-package concepts based on the proposed antenna are introduced. The performance of proposed antenna with two feeding methods is detailed investigated. A prototype to verify the proposed AMC-based patch antenna fed by microstrip line was successfully fabricated with a compact size of 1.2 λ 0 ×1.2 λ 0 ×0.05 λ 0 (λ 0 is the free space wavelength at 28 GHz). The measured results demonstrate that a wide impedance bandwidth of 17% for |S 11 | below -10 dB is achieved from 26.9 GHz to 31.9 GHz, and a peak gain of 7.43 dBi is obtained at 31.3 GHz. The proposed antenna and its AiP concepts are fully compatible with the state-of-the-art substrate manufacturing process and high data rate demands for 5G millimeter wave application.