Title :
Low-profile wideband unidirectional patch antenna with improved feed structure
Author :
Kai He ; Shuxi Gong ; Feng Gao
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China
Abstract :
A low-profile wideband unidirectional patch antenna excited by a tapered staircase-shaped feed strip with a tuning patch is presented. A prototype with a height of 17 mm (0.156λ) was studied. The results show that an impedance bandwidth of 86.2% for |S11| <; - 10 dB from 1.57 to 3.95 GHz was achieved. Stable and symmetric unidirectional radiation patterns, a low cross-polarisation level, low back radiation and an antenna gain ranging from 6.2 to 9.7 dBi was obtained over the operating band.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; microstrip antennas; antenna gain; frequency 1.57 GHz to 3.95 GHz; improved feed structure; low back radiation; low cross-polarisation level; low-profile wideband unidirectional patch antenna; symmetric unidirectional radiation patterns; tapered staircase-shaped feed strip; tuning patch;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.4309
