Abstract
A monofilar spiral slot antenna with a cavity-backed reflector is presented, which can achieve the performance of the wide axial ratio beamwave for global positioning system (GPS) system. It comprises an arrangement of a single printed spiral slots fed by a 50-Ω microstrip line. By using cavity-backed covering the slot structure, a wide axial ratio beamwidth performance is achieved in the GPS L1 frequency. The angle with less than 3-dB axial ratio at 1.575 GHz in the YoZ plane is about 215°. The measured results show that the HPBW beamwidths at 1.575 GHz are 100° in the YoZ plane, respectively. The peak gain is 5.5 dBic. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1050-1054, 2014
| Original language | English |
|---|---|
| Pages (from-to) | 1050-1054 |
| Number of pages | 5 |
| Journal | Microwave and Optical Technology Letters |
| Volume | 56 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2014 |
Keywords
- GPS system
- circular polarization
- spiral slot antenna
- wide beamwidth; HPBW: half power beamwidth; RHCP: right-handed circular polarization