Title :
The cloverleaf antenna: A compact wide-bandwidth dual-polarization feed for CHIME
Author :
Meiling Deng ; Campbell-Wilson, Ducan
Author_Institution :
Dept. of Phys. & Astron., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
We have developed a compact, wide-bandwidth, dual-polarization cloverleaf-shaped antenna to feed the CHIME radio telescope. The antenna has been tuned using CST to have smaller than -10dB s11 for over an octave of bandwidth, covering the full CHIME band from 400MHz to 800MHz and this performance has been confirmed by measurement. The antennas are made of conventional low loss circuit boards and can be mass produced economically, which is important because CHIME requires 1280 feeds. They are compact enough to be placed 30cm apart in a linear array at any azimuthal rotation.
Keywords :
UHF antennas; antenna feeds; electromagnetic wave polarisation; radiotelescopes; CHIME radio telescope; CST; azimuthal rotation; compact wide-bandwidth dual-polarization feed antenna; dual-polarization cloverleaf-shaped antenna; frequency 400 MHz to 800 MHz; linear array; low loss circuit boards; Antenna feeds; Antenna measurements; Broadband antennas; Extraterrestrial measurements; Shape; Transmission line measurements; antenna; dual polarization; radio telescope; wide bandwidth;
Conference_Titel :
Antenna Technology and Applied Electromagnetics (ANTEM), 2014 16th International Symposium on
Conference_Location :
Victoria, BC
DOI :
10.1109/ANTEM.2014.6887670
