Title :
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
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;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2260521
