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International Journal of Antennas and Propagation
Volume 2016 (2016), Article ID 9812642, 11 pages
http://dx.doi.org/10.1155/2016/9812642
Research Article

A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone

1School of Information Engineering, Communication University of China, Beijing 100024, China
2Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Omaha, NE 68182, USA
3Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

Received 28 March 2016; Revised 1 June 2016; Accepted 12 June 2016

Academic Editor: Yu Jian Cheng

Copyright © 2016 Zengrui Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The characteristics of a novel antipodal Vivaldi antenna array mounted on a dielectric cone are presented. By employing antipodal Vivaldi antenna element, the antenna array shows ultrawide bandwidth and end-fire radiation characteristics. Our simulations show that the cone curvature has an obvious influence on the performance of the conformal antenna, in terms of both the bandwidth and the radiation patterns. The thickness and permittivity of the dielectric cone have an effect on the bandwidth of the conformal antenna. Measurement results of both single antenna and conformal antenna array show a good agreement with the simulated results. The measured conformal antenna can achieve a −10 dB with bandwidth of 2.2–12 GHz and demonstrate a typical end-fire radiation beam. These findings provide useful guidelines and insights for the design of wideband end-fire antennas mounted on a dielectric cone.