Circular-polarization reconfigurable monopole antenna with enhanced boresight gain for GNSS applications

Author

Cao, Y.F. ; Cheung, S.W. ; Yuk, T.I.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

fYear

2015

fDate

13-17 April 2015

Firstpage

1

Lastpage

5

Abstract

A circular-polarization (CP) reconfigurable monopole antenna with enhanced boresight-gain for GNSS applications is proposed. The antenna consists of two meandered monopoles placed perpendicular to each other, a feeding network using the Wilkinson power divider, two switchable 90°-phase-shifters, a defected ground structure (DGS) and a metallic reflector. The metallic reflector is placed at the back of the antenna to improve efficiency and boresight gain. Simulation results show that the metallic reflector can substantially increase the efficiency and boresight-gain of the antenna by about 20% and 5 dB, respectively, in the operating band, yet retaining the impedance bandwidth and axial-ratio bandwidth.

Keywords

monopole antennas; phase shifters; reflector antennas; satellite antennas; satellite navigation; GNSS; Wilkinson power divider; circular-polarization reconfigurable monopole antenna; defected ground structure; metallic reflector; phase-shifters; Gain; Global Positioning System; Microstrip antennas; PIN photodiodes; Reflector antennas; Slot antennas; GNSS; biasing circuit; boresight gain enhancement; monopole antenna; polarization reconfigurable; reflector;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2015 9th European Conference on

Conference_Location

Lisbon

Type

conf

Filename

7228222