Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2002.10a
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- Pages.297-302
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- 2002
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- 1226-9743(pISSN)
The Ka-band Low Noise and Stable Receiver Design of Digital Correlation Radiometer for High Spatial Resolution
- Choi, Jun-Ho (Department of Mechatronics, Kwangju Institute of Science and Technology) ;
- Kim, Sung-Hyun (Department of Mechatronics, Kwangju Institute of Science and Technology) ;
- Kang, Gum-Sil (Department of Mechatronics, Kwangju Institute of Science and Technology) ;
- Park, Hyuk (Department of Mechatronics, Kwangju Institute of Science and Technology) ;
- Choi, Seh-Wan (Department of Mechatronics, Kwangju Institute of Science and Technology) ;
- Jiang, Jing-Shan (National Microwave Remote Sensing Laboratory, CSSAR) ;
- Kim, Yong-Hoon (Department of Mechatronics, Kwangju Institute of Science and Technology)
- Published : 2002.10.01
Abstract
The subsystems of two channel correlation radiometer such as RF front-end, IF and LF unit, LO unit, software based I/Q demodulator and complex correlator are characterized and their performance is analyzed in this paper. The limited hardware calibration method and receiver design consideration are discussed. The receiver architecture of 37GHz correlation radiometer is integrated. The designed radiometer employs a single-sideband superheterodyne receiver. The center frequency of the radiometer is 37 GHz and IF center frequency is 1.95 GHz with the equivalent noise bandwidth of 79.6 MHz. The receiver has less than 4.2 dB noise figure which is calculated by the Y-factor method and its gain can be adjusted from 60 dB to 80 dB.
Keywords