600-696GHz Heterodyne Receivers Submillimeter Array of Taiwan

In 2003-2004, two set of 600-696GHz SIS heterodyne receiver for SMA band 1   are developed. The receiver noise temperature, the noise contribution,and the receiver optics beam pattern are measured. the two receiver modules are installed into the receiver chamber of SMA Antenna #7 and #8 located at 4089 meter-high Mauna Kea, Hawaii in October and November 2004, respectively.

(Left) SMA receiver insert of the 600-696GHz band, and (Right) the Zitex G-108 film 4-layer IR blocking filter in front of the Teflon lens.

Detail configuration of the 600-696GHz local oscillator module with manual tuners.

Measured results of the receiver DSB noise temperature at different IF frequencies. The modules under test are receiver insert #1, optics Insert #2 and LO module #2001-008.

　

(a) (b)

(c) (d)

Measured results of (a),(b) amplitude pattern contours and (c),(d) phase pattern contours of SMA Antenna-7 and 8 for the 690 GHz SIS receivers with Martin-Puplett diplexers. The amplitude contours are in 3-dB step and phase contours are in 45-degree step. The ripples on the contour come from the residue reflections along the Gaussian beam.

Reference of this work:

[1] Y.-J. Hwang, M.-T. Chen, E. Chung, and T.-H. Chu, " A novel near field vector beam measurement system at 690 GHz," Proceedings of 34th European Microwave Conference, pp. 557-560,  Oct. 2004.

[2] Y.J. Hwang, M.-J. Wang, Homin Jiang, S.-C.Shi, Qijun Yao, and M.-T. Chen, “Development of a 600-696GHz heterodyne receiver with fixed-tuned SIS mixer and Martin-Puplett LO/RF diplexer,” Proceedings of 17th Asia-Pacific Microwave Conference, vol. 1, pp.256-259, December 2005.

(latest modify: May 09, 2008)