Dual-Band Circularly Polarized Antenna Combining Slot and Microstrip Modes for GPS With HIS Ground Plane

Author

Yuan-Ming Cai ; Ke Li ; Ying-Zeng Yin ; Xueshi Ren

Author_Institution

Sci. & Technol. on Antennas & Microwave Lab., Xidian Univ., Xi´an, China

Volume

14

fYear

2015

fDate

2015

Firstpage

1129

Lastpage

1132

Abstract

A dual-band circularly polarized antenna for GPS L1 and L2 bands is proposed and investigated in this letter. The dual-band design is realized based on the strategy of combining the microstrip mode and annular slot mode. The proposed antenna consists of an annular slot radiator printed on a square substrate and a high impedance surface (HIS) ground plane. The HIS, working as ground plane for microstrip mode and reflector for slot mode radiation, is settled under the square substrate to realize unidirectional radiation with low profile. Experimental results show that the proposed antenna exhibits two overlapped impedance and axial ratio bandwidth of 40 MHz (1.210-1.250 GHz) and 50 MHz (1.555-1.605 GHz) and the measured gains are about 8.0 dBic and 7.5 dBic, respectively. Very low backward radiation can also be observed in both operating bands.

Keywords

Global Positioning System; UHF antennas; antenna radiation patterns; electromagnetic wave polarisation; loop antennas; microstrip antennas; multifrequency antennas; reflector antennas; slot antennas; GPS; HIS ground plane; L1 band; L2 band; annular slot antenna radiation mode; bandwidth 40 MHz; bandwidth 50 MHz; dual-band circularly polarized antenna; frequency 1.210 GHz to 1.250 GHz; frequency 1.555 GHz to 1.605 GHz; high impedance surface ground plane; microstrip antenna mode; reflector; square substrate; unidirectional radiation; very low backward radiation; Antenna measurements; Dual band; Global Positioning System; Microstrip; Microstrip antennas; Slot antennas; Annular slot; backward radiation; circular polarization; high impedance surface (HIS); microstrip mode;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2395538

Filename

7018082