Title :
Annular slot antenna for high-precision GPS applications
Author :
Pereira, L.S. ; Farias, Roger L. ; Lucatel, C. ; Heckler, Marcos V. T. ; Tinoco Salazar, Alexis F.
Author_Institution :
Univ. Fed. do Pampa - UNIPAMPA, Alegrete, Brazil
Abstract :
This paper presents the design of a printed antenna with annular slot geometry for GNSS applications. Two prototypes were built in order to meet the requirements of these systems. Different feeding techniques have been proposed in order to obtain the right-hand circular polarization. Electrical walls were added in the prototypes to avoid losses by parallel plate modes, to improve the radiation efficiency, gain and axial ratio. The proposed geometries were designed and built with two different feeding schemes: the first one is based on a series feed, whereas the other is based on the integration of a 90°-hybrid. The results showed that the synthesized antenna has all features required to operate in the Global Navigation Satellite Systems (GNSS).
Keywords :
Global Positioning System; microstrip antennas; polarisation; slot antennas; GNSS applications; Global Navigation Satellite Systems; annular slot antenna; annular slot geometry; axial ratio; electrical walls; feeding techniques; geometries; high-precision GPS applications; parallel plate modes; printed antenna; radiation efficiency; right-hand circular polarization; series feed; Antennas; Cavity resonators; Global Navigation Satellite Systems; Gold; Robustness; Slot antenna; antenna; satellite navigation system;
Conference_Titel :
Microwave & Optoelectronics Conference (IMOC), 2013 SBMO/IEEE MTT-S International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/IMOC.2013.6646481
