Broadband High-Gain Empty SIW Cavity-Backed Slot Antenna

• Published in: IEEE antennas and wireless propagation letters Vol. 20; no. 10; pp. 2073 - 2077
• Main Authors: Wang, Ren, Duan, Yu, Song, Yu, Zhao, Wu-Guang, Lv, Yan-He, Liang, Mu-Sheng, Wang, Bing-Zhong
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-10-2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Antennas; Bandwidth; Bandwidths; Broadband; Broadband antennas; cavity-backed antenna; Communications systems; Electric fields; empty substrate-integrated waveguide (ESIW); High gain; Hybrid modes; Slot antennas; Substrate integrated waveguides; Substrates
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2021.3103751

To broaden the bandwidth of high-gain substrate-integrated waveguide (SIW) cavity-backed slot antennas, an empty SIW (ESIW) cavity-backed antenna with multiple high-order hybrid modes is proposed. Due to the ESIW configuration, the proposed antenna is independent on substrates and a high efficiency more than 90% in the operational band can be realized even the typical low-cost high-loss FR4 substrate is used. The proposed antenna has a wide measured bandwidth of 40.8% and the maximum measured realized gain can reach 11.1 dBi. The proposed broadband high-gain antenna can be used in radar and communication systems.