JPS56108947A - Radio receiver for microwave radiometer - Google Patents

Radio receiver for microwave radiometer

Info

Publication number
JPS56108947A
JPS56108947A JP1186680A JP1186680A JPS56108947A JP S56108947 A JPS56108947 A JP S56108947A JP 1186680 A JP1186680 A JP 1186680A JP 1186680 A JP1186680 A JP 1186680A JP S56108947 A JPS56108947 A JP S56108947A
Authority
JP
Japan
Prior art keywords
converter
switch
calibration
radio receiver
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1186680A
Other languages
Japanese (ja)
Inventor
Yoshiatsu Machino
Masao Suyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1186680A priority Critical patent/JPS56108947A/en
Publication of JPS56108947A publication Critical patent/JPS56108947A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/006—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of the effect of a material on microwaves or longer electromagnetic waves, e.g. measuring temperature via microwaves emitted by the object

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To improve the resolving power of an A/D converter by applying automatic gain control (AGC) to the A/D converter during observing in a radio receiver of Dicke type. CONSTITUTION:The electromagnetic wave received in an antenna 1 passes a switch 2 and passes a comparing noise source 3 and a Dicke switch 4 which makes change- over operation at fixed intervals. Thence, the signal is converted of frequency and amplified in an RF/IF circuit 5, is passed through a square-law detector 6 and is adjusted of level at a step attenuator 7. The attenuator 7 forms an AGC circuit by feeding back the output of an A/D converter 8. The input signal is detected by the signal from an oscillator 10 by a synchronous detector 9. Next, it goes through an integrating circuit 11 and is outputted from the A/D converter 8 after it has been A/D converted. A low temp. noise source 12 and high-temp. noise source 13 for calibration are changed over by a change-over switch 14, and at the calibrating with the switch 2, either of the two noise sources for calibration is connected to a radio receiver. After the calibration is completed, the AGC circuit is closed and the AGC circuit is so operated that the input to the A/D converter is always the maximum input voltage even during the observation of antenna input noise.
JP1186680A 1980-02-01 1980-02-01 Radio receiver for microwave radiometer Pending JPS56108947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1186680A JPS56108947A (en) 1980-02-01 1980-02-01 Radio receiver for microwave radiometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1186680A JPS56108947A (en) 1980-02-01 1980-02-01 Radio receiver for microwave radiometer

Publications (1)

Publication Number Publication Date
JPS56108947A true JPS56108947A (en) 1981-08-28

Family

ID=11789633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1186680A Pending JPS56108947A (en) 1980-02-01 1980-02-01 Radio receiver for microwave radiometer

Country Status (1)

Country Link
JP (1) JPS56108947A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946542A (en) * 1982-09-08 1984-03-15 Mitsubishi Electric Corp Receiver of microwave radiometer
EP1233615A1 (en) 2001-02-16 2002-08-21 Thomson Licensing S.A. Receiving device with automatic gain control
WO2006019746A1 (en) * 2004-07-14 2006-02-23 Xytrans, Inc. Switched measuring system and method for measuring radiant signals
EP1923679A1 (en) * 2006-11-16 2008-05-21 Pixartis SA Autocalibrating Multichannel Radiometer
EP1980831A1 (en) * 2007-04-12 2008-10-15 Universite Des Sciences Et Technologies De Lille Radiometric thermometer
JP2018141658A (en) * 2017-02-27 2018-09-13 国立大学法人群馬大学 Oscillating radar apparatus and data analysis apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946542A (en) * 1982-09-08 1984-03-15 Mitsubishi Electric Corp Receiver of microwave radiometer
EP1233615A1 (en) 2001-02-16 2002-08-21 Thomson Licensing S.A. Receiving device with automatic gain control
FR2821228A1 (en) * 2001-02-16 2002-08-23 Thomson Multimedia Sa AUTOMATIC GAIN CONTROL RECEIVING DEVICE
US7046976B2 (en) 2001-02-16 2006-05-16 Thomson Licensing Receiving device with automatic gain control
WO2006019746A1 (en) * 2004-07-14 2006-02-23 Xytrans, Inc. Switched measuring system and method for measuring radiant signals
WO2008059444A2 (en) * 2006-11-16 2008-05-22 Pixartis Sa Autocalibrating multichannel radiometer
EP1923679A1 (en) * 2006-11-16 2008-05-21 Pixartis SA Autocalibrating Multichannel Radiometer
WO2008059444A3 (en) * 2006-11-16 2008-07-10 Pixartis Sa Autocalibrating multichannel radiometer
EP1980831A1 (en) * 2007-04-12 2008-10-15 Universite Des Sciences Et Technologies De Lille Radiometric thermometer
WO2008142283A2 (en) * 2007-04-12 2008-11-27 Universite Des Sciences Et Technologies De Lille Radiometric thermometer
WO2008142283A3 (en) * 2007-04-12 2009-02-05 Univ Lille Sciences Tech Radiometric thermometer
US8157442B2 (en) 2007-04-12 2012-04-17 Universite Des Sciences Et Technologies De Lille Radiometric thermometer
JP2018141658A (en) * 2017-02-27 2018-09-13 国立大学法人群馬大学 Oscillating radar apparatus and data analysis apparatus

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