Title :
Yagi-Uda antenna with small size for vehicles
Author :
Xin, Q. ; Zhang, F.-S. ; Sun, B.-H. ; Zou, Y.-L. ; Liu, Q.-Z.
Author_Institution :
Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´an, China
Abstract :
A compact Yagi-Uda antenna for vehicle directional communications in tactical VHF (30-88-MHz) is presented. A special double-folded monopole is designed as the element of the Yagi-Uda antenna to realise compact size and high directivity. The proposed antenna designed and optimised at 59-MHz can utilise the vehicle space reasonably with greatly compact height (0.1199-) and space between elements (0.125-). It has satisfactory performances of high directivity, gain (6.3-dBi) and front-to-back ratio (8.6-dB) in the operating band (VSWR-2), better than the typical monopole-type Yagi-Uda antenna. Thus, it is suitable for vehicle directional communications in tactical VHF. The effectiveness of the design is verified by a scaled-down model at 1-GHz.
Keywords :
VHF antennas; Yagi antenna arrays; directive antennas; monopole antennas; vehicles; antenna design; compact Yagi-Uda antenna; compact size antenna; double-folded monopole antenna; frequency 1 GHz; frequency 30 MHz to 88 MHz; front-to-back ratio; high directivity antenna; small size antenna; tactical VHF; vehicle directional communication; vehicle space;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.0148
