Affiliations: [a] College of Electronics and Information Engineering, Sichuan University,
Chengdu, Sichuan, China | [b] Institute of Nuclear Science and Technology, Key Laboratory of Radiation
Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan, China | [c] Sichuan Normal University, Chengdu, Sichuan, China
Correspondence:
[*]
Corresponding author: Chen Xu, Institute of Nuclear Science and Technology, Key Laboratory of Radiation Physics and Technology, Ministry of Education, Sichuan University,
Chengdu 610065, Sichuan, China. E-mail: xuchen9269@163.com
Abstract: Two different antipodal Vivaldi antennas design with better
performances are proposed. The one is a small antipodal Vivaldi antenna for a
4.1–20 GHz frequency range, and its dimension is only 34 × 50
mm^{2}. Another proposed high gain antenna can achieve the
maximum gain of 15.2 dBi within its operating band. Measured results of the
manufactured antipodal Vivaldi antennas are in good agreement with the
simulated ones. Besides the |S_{11}|, far field radiation
pattern, current distribution, phase, gain, and group delay which are important
parameters of impulse distortion in ultra-wide band antenna are well analyzed.
All results show that the proposed antipodal Vivaldi antennas have better
performances and they are well suited for ultra-wide band communications.
Keywords: Ultra-wide band, small antenna, high gain, Vivaldi antenna
