Broadband aperture-coupling patch antenna with improved radiation and scattering performance based on metamaterial absorber

• Published in: IET microwaves, antennas & propagation Vol. 13; no. 7; pp. 875 - 880
• Main Authors: Zhou, Yu-Long, Cao, Xiang-Yu, Gao, Jun, Zheng, Yue-Jun, Yang, Huan-Huan, Li, Si-Jia
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 12.06.2019
• Subjects: antenna radiation patterns; APCA operating bandwidth; broadband aperture‐coupling patch antenna; electromagnetic wave polarisation; frequency 3.0 GHz to 16.0 GHz; frequency 8.1 GHz to 10.9 GHz; frequency 8.7 GHz; gain 2.3 dB; gain enhancement; MA‐based APCA; metamaterial antennas; microstrip antennas; noise figure 21.9 dB; noise figure 46.2 dB; novel broadband metamaterial absorber; radar antennas; RCS reduction; reduction band; Research Article; APCA operating bandwidth; electromagnetic wave polarisation; noise figure 46.2 dB; radar antennas; microstrip antennas; noise figure 21.9 dB; gain 2.3 dB; novel broadband metamaterial absorber; RCS reduction; metamaterial antennas; frequency 8.1 GHz to 10.9 GHz; antenna radiation patterns; MA-based APCA; frequency 8.7 GHz; broadband aperture-coupling patch antenna; frequency 3.0 GHz to 16.0 GHz; gain enhancement; reduction band
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2018.5118

A broadband aperture-coupling patch antenna (ACPA) with improved radiation and scattering performance is proposed and analysed. In order to broaden the operating bandwidth of APCA, parameters of APCA are investigated and optimised. Then, a novel broadband metamaterial absorber (MA) is designed to be coplanar on APCA. Simulated results indicate that MA-based APCA possess a remarkable RCS reduction and gain enhancement. The RCS reduction is achieved from 3 GHz to 16.0 GHz for the both polarisation, with a maximum reduction of 46.2 dB under x-polarisation incidence at 8.1 GHz and 21.9 dB under y-polarisation incidence at 8.7 GHz. The operating bandwidth of MA-based APCA is also covered by the reduction band, which is from 8.1 GHz to 10.9 GHz. Meanwhile, the gain enhancement is also achieved in the operating band, and the maximum improvement is 2.3 dB at 10.9 GHz. A prototype has been fabricated and measured, and measured results are in agreement with the corresponding simulated results.