Broadband and high‐aperture‐efficiency metasurface antenna using multi‐mode radiator

Abstract

A high‐aperture efficiency and broadband metasurface antenna array with multi‐mode radiator is put forward in this article. The abnormal slot is etched at the center of the ground plane and fed to the antenna via a microstrip line. Resonant along the slot line, and in the electric field, two short horizontal lines with uniform gaps are symmetrically added near zero. Additional radiation modes have been introduced. Then, broadband slot antenna with two resonances is obtained by combining full‐wavelengths provided by the first slot. Working bandwidth increased from 7.6% to 21.1%. By introducing a ring slot, the antenna gain is increased by 0.9 dBi. At the same time, the aperture efficiency is modified by 12.9%. A 2 × 2 array was made to verify the design, with an overall size of 2.01λ0× 2.01λ0 × 0.07λ0. The simulation and measurement results show that the operating bandwidth is 38.9% with maximum gain is 15.8 dBi.

A Wideband Metasurface Antenna Using Multi-Mode Radiator for Broadband Wireless Communication Applications

“…This metasurface antenna obtain a wide impedance bandwidth of 54.4%. In [21], slots are etched at the ground to add a new mode. The metasurface antenna obtain an impedance bandwidth of 38.9% under dualmode resonant.…”

Broadband metasurface antenna with size‐varying square patches

“…The impedance bandwidth is 16% at central frequency of 28 GHz. In Bai and Wang, 14 a MS antenna with a special feeding slot has been proposed. The impedance bandwidth is 38.9% by combining two slot modes.…”