Title :
Wide band side fed bifilar helix antenna caged in passive quadrifilar helix structure
Author :
Shah, Waqar A. ; Shoaib, Sultan ; Islam, Qamarul ; Amin, Muhammad
Author_Institution :
Dept. of Commun. Syst. Eng., Inst. of Space Technol., Islamabad, Pakistan
Abstract :
In this paper a wideband side fed bifilar helix antenna enclosed in a cage of passive quadrifilar helix antenna (QHA) is presented. Simulation results show that the bandwidth of the side fed bifilar for VSWR ¿ 2 is increased from 1175-1240 MHz to that of 870-1535 MHz (greater than tenfold increase in bandwidth) by placing inside the passive QHA as compared to the side fed bifilar structure when simulated in isolation with predominantly omni-directional radiation pattern in the range of 500-1600 MHz. The measured results show that VSWR of the antenna is less than or equal to 2.4 from 281 MHz to greater than 2 GHz.
Keywords :
antenna radiation patterns; broadband antennas; VSWR; omni-directional radiation pattern; passive quadrifilar helix antenna; quadrifilar helix structure; wideband side fed bifilar helix antenna; Antenna feeds; Antenna measurements; Antenna radiation patterns; Artificial satellites; Bandwidth; Broadband antennas; Dipole antennas; Helical antennas; Systems engineering and theory; Wire; Quadrifilar helix antenna; side-fed bifilar helix antenna; wide band antenna;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2010 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-4725-1
Electronic_ISBN :
978-1-4244-4726-8
DOI :
10.1109/RWS.2010.5434217
