Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4953889 | AEU - International Journal of Electronics and Communications | 2017 | 20 Pages |
Abstract
In this letter, a new configuration of sequentially rotated circularly polarized (CP) array antenna with a modified gain is investigated. In order to realize the presented antenna, four Archimedean spiral radiators are applied on a substrate, backed by a circularly slotted ground plane. Also a combination of 180° rat-race coupler and 90° branch-line couplers prepare the employed feeding network in this study. Furthermore, cavity-backed structure is utilized to enhance the antenna gain and achieve a directional radiation pattern over the operating frequency band. This configuration also extends the return loss (RL) and the axial ratio (AR) bandwidths, simultaneously. According to the experimental results, the 2 Ã 2 CP array antenna has RL bandwidth of 64.28%, AR bandwidth of 54.28%, and peak gain of 10.84 dBic. The close correspondence between the measured and the simulated results validates the proposed design.
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
A. Siahcheshm, J. Nourinia, Ch. Ghobadi, M. Karamirad, B. Mohammadi,