Title :
Wideband and compact quasi-Yagi antenna with bowtie-shaped drivers
Author :
Hao Wang ; Yan Chen ; Fangshu Liu ; Xiaowei Shi
Author_Institution :
Nat. Key Lab. of Antenna & Microwave Technol., Xidian Univ., Xian, China
fDate :
September 26 2013
Abstract :
A wideband and compact end-fire antenna with bowtie-shape drivers is proposed. Based on a wideband microstrip-to-coplanar stripline transition and bowtie-shaped drivers, a broadband impedance bandwidth of more than 75% (4.70-10.44 GHz) for return loss less than - 15 dB and a gain of 5.0-9.1 dBi are obtained. What is more, the front-to-back ratio over the frequency of interest is less than - 10 dB. The overall dimensions of the proposed antenna are only 30 × 24.24 mm2. A prototype is fabricated and measured. The simulated and measured results of the proposed antenna indicate that it is suitable for phased array and microwave imaging systems.
Keywords :
antenna phased arrays; bow-tie antennas; broadband antennas; driver circuits; microstrip transitions; bowtie shaped driver; broadband impedance bandwidth; compact end-fire antenna; compact quasi-Yagi antenna; front-to-back ratio; microwave imaging system; phased array; return loss; wideband antenna; wideband microstrip-to-coplanar stripline transition;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.2454
