Dual-Band Circularly Polarized Annular-Ring Microstrip Antenna for GNSS Applications

Author

Zhang, Yong-Qin ; Li, Xin ; Yang, Lei ; Gong, Shu-Xi

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China

Volume

12

fYear

2013

fDate

2013

Firstpage

615

Lastpage

618

Abstract

A dual-band circularly polarized antenna fed by four apertures that covers the bands of GPS (L1, L2, L5), Galileo (E5a, E5b, E1, E2, L1), and GLONASS (L1, L3) is introduced. A lotus-shaped aperture is added to optimize the coupling between the microstrip lines and the rings. Three wideband planar baluns are used to achieve good axial ratio (lower than 2.1 dB in both bands) and VSWR (41.2%). The measured results of the annular-ring microstrip antenna show good performance of a dual-band operation, and they confirm the validity of this design, which meets the requirement of Global Navigation Satellite System (GNSS) applications.

Keywords

Global Positioning System; microstrip antennas; microstrip lines; multifrequency antennas; polarisation; GLONASS; GNSS applications; GPS; Galileo; Global navigation satellite system applications; dual-band circularly polarized annular-ring microstrip antenna; dual-band operation; lotus-shaped aperture; microstrip lines; wideband planar baluns; Broadband feed network; Global Navigation Satellite System (GNSS); circularly polarized (CP); coupling feed; dual-band patch antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2260521

Filename

6509914