Title :
A new GPS quadrifilar helix antenna
Author :
Shumaker, P.K. ; Chien H.Ho ; Smith, K.B.
Author_Institution :
Garmin Commun. & Navigation, USA
Abstract :
This paper discusses the design and measurement of a new printed half wavelength quadrifilar helix antenna. We use infinite microstrip baluns to feed the helical antenna. This feeding technique reduces the antenna´s physical size and provides an ease of mass production. Experiment results show that the printed volute antenna has a 3 dB beamwidth of more than 145/spl deg/ and a front-to-back ratio of more than 20 dB.
Keywords :
Global Positioning System; antenna feeds; antenna testing; baluns; microstrip antennas; microstrip lines; 3 dB beamwidth; GPS quadrifilar helix antenna; antenna design; antenna feed; antenna measurement; experiment results; front-to-back ratio; infinite microstrip baluns; mass production; printed half wavelength quadrifilar helix antenna; printed volute antenna; Antenna feeds; Antenna measurements; Global Positioning System; Helical antennas; Impedance matching; Loss measurement; Microstrip antennas; Polarization; Satellites; Strips;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549991
