Title :
Development of 460 GHz and Dual Polarization SIS Mixers for the Submillimeter Array
Author :
Li, Chao-Te ; Liu, Kuan-Yu ; Lu, Wei-Chun ; Chiu, Chuang-Ping ; Chen, Tse-Jun ; Chen, Chong-Wen ; Chang, Yung-Chin ; Wang, Ming-Jye ; Shi, Sheng-Cai
Author_Institution :
Inst. of Astron. & Astrophys., Acad. Sinica, Taipei, Taiwan
fDate :
6/1/2011 12:00:00 AM
Abstract :
A heterodyne receiver incorporating superconductor-insulator-superconductor (SIS) mixers has been designed to cover the frequency range from 400 to 520 GHz of the Submillimeter Array (SMA). Various tuning circuits have been employed to resonate out the geometric capacitance of the junction and provide impedance matching to the waveguide probe. Our measurements indicated that a receiver noise temperature of around 90 K, with the contributions from the input noise and intermediate frequency (IF) noise estimated to be around 60 K and 10 K, respectively. SIS mixers integrated with planar orthomode transducers (OMT) have also been designed at 345 GHz for dual polarization detections, and results from the 3-dimensional (3-D) electromagnetic (EM) simulations are presented.
Keywords :
circuit tuning; computational electromagnetics; electromagnetic wave polarisation; impedance matching; radiowave interferometers; submillimetre wave antennas; submillimetre wave mixers; submillimetre wave receivers; superconductor-insulator-superconductor mixers; transducers; 3-dimensional electromagnetic simulation; dual polarization SIS mixer; dual polarization detection; frequency 400 GHz to 520 GHz; heterodyne receiver; impedance matching; input noise; intermediate frequency noise; planar OMT; planar orthomode transducer; receiver noise temperature; submillimeter array; superconductor-insulator-superconductor mixer; temperature 90 K; tuning circuit; Impedance; Junctions; Mixers; Noise; Probes; Receivers; Tuning; Orthomode transducer; SIS mixer; polarization; submillimeter array;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2098835
