Edge-radiating slot antenna based on half-mode substrate integrated waveguide

• Published in: IET microwaves, antennas & propagation Vol. 11; no. 8; pp. 1106 - 1112
• Main Authors: Zou, Xiong, Tong, Chuang-Ming, He, Huan, Geng, Fangzhi
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 22.06.2017
• Subjects: antenna radiation patterns; etching; frequency 3.05 GHz to 3.35 GHz; frequency‐scanning property; half‐mode SIW edge‐radiating slot antenna; half‐mode substrate integrated waveguide edge‐radiating slot antenna; HMSIW field distribution; matching posts; matching‐type antenna; microwave radar applications; radiation efficiency; Research Article; slot antennas; substrate integrated waveguides; terminal load; transversal slot etching; wireless communication systems; etching; half-mode SIW edge-radiating slot antenna; half-mode substrate integrated waveguide edge-radiating slot antenna; transversal slot etching; terminal load; frequency-scanning property; microwave radar applications; radiation efficiency; slot antennas; antenna radiation patterns; frequency 3.05 GHz to 3.35 GHz; HMSIW field distribution; matching posts; matching-type antenna; wireless communication systems; substrate integrated waveguides
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2016.0884

Lots of substrate integrated waveguide (SIW) slot antennas appear to satisfy the extensive and intensive growth of wireless communication systems. However, there were few reports about edge-radiating slot antenna based on SIW technology. In this study, a half-mode SIW (HMSIW) edge-radiating slot antenna is proposed for the first time by etching transversal slots both on the upper and lower surfaces of HMSIW. The radiation field of this antenna has been deduced from the field distribution of HMSIW. A 6-slot-pair antenna worked at 3.0 GHz with gain of 5.8 dBi is obtained by regulating the size and the number of slots. Through setting matching posts and a terminal load, the bandwidth can be expanded from 2 to 9.7%. The measured results show that the matching-type antenna has radiation efficiency about 0.59, beam directions ranging from 0° to 53° and gains within 5.0–7.5 dBi in 3.05–3.35 GHz. This antenna has advantages of low profile, easy fabrication, wide bandwidth and frequency-scanning property, which are great for microwave radar applications.