Title :
Short backfire antenna with concentric sleeves for highly sensitive radio astronomical receivers
Author :
Chi-Chang Lin ; Yuh-Jing Hwang ; Srikanth, S.
Author_Institution :
Acad. Sinica Inst. of Astron. & Astrophys., Taipei, Taiwan
Abstract :
A broadband 800-MHz short backfire antenna (SBA) integrated with a cryogenic vacuum chamber is designed for astronomical applications. The cryostat offers the low-temperature condition to front-end components because of low-noise demands for the astronomy observations. In order to overcome the impacts from the cryostat, the SBA adopts a pair of concentric sleeves to replace the conventional double-discs design. It features a dual-mode response and enhances the bandwidth. The simulated results show the VSWR less than 2.2 and the gain of 11-15 dBi over the band of 700-945 MHz.
Keywords :
astronomical observatories; cryogenics; cryostats; multifrequency antennas; reflector antennas; SBA; astronomy observation; bandwidth 700 MHz to 945 MHz; concentric sleeve; cryogenic vacuum chamber; cryostat; double disc design; dual mode response; frequency 800 MHz; front end component; radio astronomical receiver; short backfire antenna; Bandwidth; Broadband antennas; Cryogenics; Dipole antennas; Gain; Impedance matching; Broadband; concentric sleeve; cryogenic vacuum chamber; cryostat; dual-band; short backfire antenna;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421915
