Title :
Alternative optics design for the ALMA band 1 receiver (35–52 GHz)
Author :
Gonzalez, Alvaro ; Tapia, Valeria ; Finger, Ricardo ; Asayama, Shin´ichiro ; Huang, Ted
Author_Institution :
Adv. Technol. Center, Nat. Astron. Obs. of Japan, Tokyo, Japan
Abstract :
The Atacama Millimeter/Sub-millimeter Array (ALMA) is one of the most powerful telescopes built to date. All the receivers that cover the 10 frequency bands (35-950 GHz) in ALMA must comply with stringent requirements in order to perform astronomical observations, in particular, low noise temperature and high aperture efficiency. The ALMA band 1 receiver optics (35-52 GHz) are composed of a corrugated horn antenna and a dielectric lens. They have proved difficult to design because of the large bandwidth to cover and truncation effects in cryostat apertures. This paper presents a design which meets the stringent ALMA requirements.
Keywords :
antenna radiation patterns; aperture antennas; cryostats; horn antennas; lens antennas; millimetre wave antenna arrays; receiving antennas; submillimetre wave antennas; telescopes; ALMA band 1 receiver optics; Atacama millimeter-submillimeter array; astronomical observation; corrugated horn antenna design; cryostat aperture; dielectric lens; frequency 35 GHz to 950 GHz; high aperture efficiency; low noise temperature; telescopes; Apertures; Bandwidth; Lenses; Mirrors; Noise; Receivers; Radio astronomy; lens; mm-wave antenna;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
