Summary
International Symposium on Antennas and Propagation
2013
Session Number:TA-P
Session:
Number:TA-P-25
Simulation of Two Compact Antipodal Vivaldi Antennas With Radiation Characteristics Enhancement
Qiancheng Ying, Wenbin Dou,
pp.-
Publication Date:2013/10/22
Online ISSN:2188-5079
Summary:
In this paper, two compact antipodal Vivaldi antennas (AVA) with improved Radiation Characteristics are presented. U-typed tapered slot edge (U-TSE) AVA and combshaped AVA with U-TSE are simulated and optimized. The -10- dB reflection coefficient bandwidth of comb-shaped AVA spans from 2.3 GHz to 18 GHz (7.83:1) and covers 15.7 GHz, while the bandwidth of conventional AVA which has the same dimensions spans from 3.3 GHz to 18 GHz (5.45:1) and covers 14.7 GHz. The U-TSE structure has the capacity to extend the low-end bandwidth limitation and improve the radiation characteristics in the lower frequencies. Compared with the conventional AVA, this modification can miniaturize the electrical size of the AVA antenna about 30%. The results regarding return loss, far field pattern, antenna gain and axial ratio are illustrated.