A miniaturized circularly polarized microstrip antenna for GPS applications

Author

Daneshmandian, F. ; Dehkhoda, P. ; Tavakoli, A.

Author_Institution

Electr. Eng. Dept., Amirkabir Univ. of Technol., Tehran, Iran

fYear

2014

fDate

20-22 May 2014

Firstpage

1653

Lastpage

1656

Abstract

A novel circularly polarized microstrip antenna is presented for global positioning system (GPS) applications at 1.575 GHz. The Crown Square fractal shape is utilized for microstrip antenna design. This antenna is designed on two different substrates and the effect of these substrates on the performance of microstrip antenna is studied. Simulation results of both cases show very good circular polarization characteristics with a 3-dB axial ratio bandwidth of about 0.51% and 0.38% and very wide beam-width of about 160^o and 115^o for a 3-dB axial ratio. Also voltage standing wave ratio (VSWR) bandwidth of about 2.2% and 1.4% are achieved in both cases. To validate the results, a prototype model of fractal antenna on available substrate is fabricated and its radiation patterns and VSWR are measured. A good agreement between the results is observed.

Keywords

Global Positioning System; UHF antennas; antenna radiation patterns; microstrip antennas; GPS; VSWR; circularly polarized microstrip antenna; crown square fractal shape; fractal antenna; frequency 1.575 GHz; global positioning system; microstrip antenna design; radiation patterns; voltage standing wave ratio; Antenna measurements; Fractal antennas; Fractals; Global Positioning System; Microstrip; Microstrip antennas; GPS applications; Microstrip antenna; axial ratio; circular polarization; fractal antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2014 22nd Iranian Conference on

Conference_Location

Tehran

Type

conf

DOI

10.1109/IranianCEE.2014.6999803

Filename

6999803