Title :
Effect of helix turn angle on the performance of a half wavelength quadrifilar antenna
Author :
Amin, Muhammad ; Cahill, Robert
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol., Queen´´s Univ., Belfast, UK
fDate :
6/1/2006 12:00:00 AM
Abstract :
The impedance and radiation pattern parameters of a λ/2 quadrifilar helix antenna (QHA) with turn angles in the range 0° to 235° are analyzed. It is shown that by selecting the helix turn angle to satisfy the minimum bandwidth and beamwidth requirements, an improved electrical performance and a reduction in the physical size of the antenna is obtained. This is demonstrated by comparing the performance of a conventional half turn QHA with structures having a smaller pitch length. The computed results are validated by experimental data at L-band.
Keywords :
UHF antennas; antenna radiation patterns; helical antennas; wire antennas; L-band; QHA; electrical performance; half wavelength quadrifilar antenna; helix turn angle; impedance pattern parameters; physical size reduction; quadrifilar helix antenna; radiation pattern parameters; satellite antenna; wire antennas; Antenna radiation patterns; Bandwidth; Helical antennas; Impedance; Pattern analysis; Polarization; Satellite antennas; Space technology; UHF antennas; Wire; Quadrifilar helix antenna (QHA); satellite antenna; size reduction; wire antennas;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.875587
