A wideband 1:19 planar radial power divider design applied in circularly polarized array antenna

Article type: Research Article

Authors: Fan, Fang-Fang^{a; *} | Yan, Ze-Hong^a | Wang, Jin-Hiu^a

Affiliations: [a] Science and Technology on Antenna and Microwave Laboratory, Xidian University, Xi'an, Shaanxi, China

Correspondence: [*] Corresponding author: Fang-Fang Fan, National Laboratory of Science and Technology on Antennas and Microwaves Xidian University, Xi'an 710071, Shaanxi, China. Tel.: +86 13474518681; Fax: +86 29 88202662; E-mail: [email protected]

Abstract: A wideband microstrip planar radial 1:19 power divider is developed in this study. The power divider design is simple with conventional impedance-transformation method, and a single substrate is employed, thereby reducing the cost for the antenna. To verify our design, the power divider was fabricated and tested. It can be observed that it achieves an impedance bandwidth of 29.4{\% (1.98 GHz–2.67 GHz) (VSWR ⩽ 2), the transmitted magnitude and phase imbalance for 19 outputs are ± 0.1 dB and ± 1 deg, respectively. The power divider is also integrated into the 19-element circularly polarized (CP) antenna array as the feed network; the simulated results show that the power divider can apply appropriate amplitudes and phases for the antenna array to obtain the good CP performance.

Keywords: Planar power divider, radial power divider, array antenna

DOI: 10.3233/JAE-140075

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 3, pp. 819-825, 2015