Title :
Miniaturised dielectrically-loaded quadrifilar antenna for global positioning system (GPS)
Author :
Leisten, O. ; Vardaxoglou, J.C. ; McEvoy, P. ; Seager, R. ; Wingfield, A.
Author_Institution :
Sarantel Ltd., Wellingborough, UK
fDate :
10/25/2001 12:00:00 AM
Abstract :
A new approach to designing a handset antenna for satellite applications is reported. It is based on precise control of the phasing between two bifilar helices, giving accurate resonant frequency position and radiation pattern volute. Results show an antenna with a gain of -2 dBi, 19 dB discrimination between the right and left hand circular polarisations and an axial ratio less than 1 dB. The front-to-back ratio is 24 dB. A return loss of 14.6 dB is also measured
Keywords :
Global Positioning System; UHF antennas; antenna radiation patterns; dielectric-loaded antennas; electromagnetic wave polarisation; helical antennas; satellite antennas; 14.6 dB; 1575.42 MHz; GPS antenna; Global Positioning System; accurate radiation pattern volute; accurate resonant frequency position; bifilar helices; circular polarisation; dielectrically-loaded quadrifilar antenna; handset antenna design; miniaturised quadrifilar antenna; return loss; satellite applications;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010906
