Title :
The conceptual design of multi-channel millimeter wave receiver for VLBI
Author :
Han, Seog-Tae ; Je, Do-Henng ; Roh, Duk-Gyu ; Wi, Seog-Oh ; Oh, Se-Jin ; Song, Min-Gyu ; Lee, Boan ; Kang, Jina
Author_Institution :
Korea Astron. Obs., South Korea
Abstract :
The most important thing in millimeter and sub-millimeter wave VLBI is how to calibrate the variations in the phase of an electromagnetic wave propagating through the troposphere. Many techniques for calibrating the phase fluctuations due to the troposphere have been well proposed and demonstrated (Alef, W. et al., 2003; Asaki, Y. et al., 1998; Sasao, T., 2002). A millimeter wave multi-channel receiver system which can be used for phase calibration in millimeter and sub-millimeter wave VLBI observation is proposed. A conceptual multi-channel receiver system and quasi-optical filters which could be used in this receiver are described.
Keywords :
calibration; high-pass filters; low-pass filters; millimetre wave filters; radio receivers; radioastronomical techniques; radiowave interferometry; tropospheric electromagnetic wave propagation; high pass filter; low pass filter; millimeter wave VLBI; multi-channel millimeter wave receiver; multi-channel receiver; phase calibration; phase fluctuations; quasi-optical filters; submillimeter wave VLBI; tropospheric electromagnetic wave propagation; Band pass filters; Calibration; Feeds; Fluctuations; Frequency; Millimeter wave technology; Observatories; Phase noise; Receivers; Terrestrial atmosphere;
Conference_Titel :
Radio Science Conference, 2004. Proceedings. 2004 Asia-Pacific
Print_ISBN :
0-7803-8404-0
DOI :
10.1109/APRASC.2004.1422499
