Title:
RADIOMETER FOR MICROWAVE RECEIVER, AND ERROR COMPENSATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/225155
Kind Code:
A1
Abstract:
A radiometer for a microwave receiver, according to the present invention, comprises: a microwave switch; a demodulator, which includes a switch synchronized with the microwave switch and multiplies, by a predetermined gain value, a signal inputted through the microwave switch; an integrator for generating an output value by calculating a signal inputted from the demodulator; a duty calibrator calibrating the duty value of a clock signal for controlling the microwave switch; a path switch located between the duty calibrator and the microwave switch; and a controller for generating the duty calibration value of the clock signal on the basis of the output value of the integrator. Therefore, a Dicke radiometer receiver can calibrate an output error voltage by means of a duty error (Δt) of a clock and a gain error (ΔA) (or mismatch) of a demodulator and can accurately measure the temperature (TA) of a target object through the calibration of the output error voltage.
Inventors:
EO YUN SEONG (KR)
JANG WONIL (KR)
KIM NAM YONG (KR)
KIM EUN SEONG (KR)
SHIN JAEWOO (KR)
JANG WONIL (KR)
KIM NAM YONG (KR)
KIM EUN SEONG (KR)
SHIN JAEWOO (KR)
Application Number:
PCT/KR2022/002082
Publication Date:
October 27, 2022
Filing Date:
February 11, 2022
Export Citation:
Assignee:
EASYTEM CO LTD (KR)
International Classes:
G01K15/00; G01D1/04; G01D5/48; G01D18/00; G01K11/00; H04L27/14
Foreign References:
| US20130272339A1 | 2013-10-17 | |||
| KR102152133B1 | 2020-09-04 | |||
| JPH06142060A | 1994-05-24 | |||
| CN102680803B | 2014-11-12 | |||
| KR102316907B1 | 2021-10-25 |
Attorney, Agent or Firm:
KIM, Sung Ho et al. (KR)
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