JPS562760A - Cross polarization measuring unit - Google Patents

Cross polarization measuring unit

Info

Publication number
JPS562760A
JPS562760A JP7836479A JP7836479A JPS562760A JP S562760 A JPS562760 A JP S562760A JP 7836479 A JP7836479 A JP 7836479A JP 7836479 A JP7836479 A JP 7836479A JP S562760 A JPS562760 A JP S562760A
Authority
JP
Japan
Prior art keywords
signal
carrier wave
low
frequency
cross polarization
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.)
Granted
Application number
JP7836479A
Other languages
Japanese (ja)
Other versions
JPS6324336B2 (en
Inventor
Toshio Sato
Fumio Makita
Kazuhiro Fujiwara
Hiroshi Okano
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
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK, Mitsubishi Electric Corp filed Critical Kokusai Denshin Denwa KK
Priority to JP7836479A priority Critical patent/JPS562760A/en
Publication of JPS562760A publication Critical patent/JPS562760A/en
Publication of JPS6324336B2 publication Critical patent/JPS6324336B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/002—Reducing depolarization effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To measure the cross polarization of a transmission frequency band simply with a high precision, by detecting phase difference changing dependently upon the delay time between transmission and receiving and by adjusting automatically the low-frequency phase, which detects cross polarization components synchronously, by this phase difference signal. CONSTITUTION:The carrier wave generated by carrier wave generator 1 is applied to carrier wave residue modulator 2 and is modulated by the second low-frequency signal 30 of synchronizing circuit 24 to output residual carrier wave 27 and side band 28, and the carrier wave above is modulated in carrier wave suppression modulator 3 by the first low-frequency signal 31 of circuit 24 to output side band 29. Outputs of modulators 2 and 3 are applied to frequency converter 7 of the moving material through transmission antenna 5, and radio waves from converter 7 are received through receiving antenna 9 by the receiving unit and are applied to reference signal detector 16. Then, the second low-frequency signal 30 is separated and detected by phase detector 19, and further, signal 33 is delayed and applied to circuit 24, and phase difference of the second low- frequency signal 30 is measured, and signal 31 is added to this signal, and output signal 32 is applied to synchronous detectors 22 and 23, thus detecting cross polarization components synchronously.
JP7836479A 1979-06-21 1979-06-21 Cross polarization measuring unit Granted JPS562760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7836479A JPS562760A (en) 1979-06-21 1979-06-21 Cross polarization measuring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7836479A JPS562760A (en) 1979-06-21 1979-06-21 Cross polarization measuring unit

Publications (2)

Publication Number Publication Date
JPS562760A true JPS562760A (en) 1981-01-13
JPS6324336B2 JPS6324336B2 (en) 1988-05-20

Family

ID=13659939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7836479A Granted JPS562760A (en) 1979-06-21 1979-06-21 Cross polarization measuring unit

Country Status (1)

Country Link
JP (1) JPS562760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603565A1 (en) 1985-02-12 1986-08-14 Sokkisha Co., Ltd., Tokio/Tokyo MEASURING VALUE WITH MAGNETIC SCALE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603565A1 (en) 1985-02-12 1986-08-14 Sokkisha Co., Ltd., Tokio/Tokyo MEASURING VALUE WITH MAGNETIC SCALE

Also Published As

Publication number Publication date
JPS6324336B2 (en) 1988-05-20

Similar Documents

Publication Publication Date Title
JPS5567642A (en) Microwave water meter having changeover measuring zone
IE45794L (en) Signal measuring device
CA2058146A1 (en) Method for fine tuning the resonant frequency of a filter in a combiner
JPS562760A (en) Cross polarization measuring unit
JPS55121163A (en) Direction measuring unit
JPS5668041A (en) Level measuring apparatus for satellite broadcast receiving antenna
JPS56132828A (en) Space diversity receiving device
EP0194085A3 (en) Tone detector with pseudo phase locked loop
JPS57200870A (en) Phase difference detector
JPS5431260A (en) Digital control phase synchronizing device
JPS5644231A (en) Signal receiver
SU647641A1 (en) Meter of group time delay non-uniformity
JPS5560863A (en) Device for measuring frequency of frequency-modulated wave
JP2648957B2 (en) Level calibration method for propagation delay time measuring device
JPS5631226A (en) Characteristic measuring system of digital communication system
JPS52106613A (en) Signal detection
JPS56108944A (en) Microwave radiometer
JPS56122977A (en) Light wave range finder
JPS5211854A (en) Phase synchronizing signal generator
JPS5672548A (en) Space diversity receiving system
JPS55134531A (en) Automatic frequency control system
JPS5368554A (en) Wide-band phase synchronous receiver
JPS57129553A (en) Am stereo receiver
JPS5625837A (en) Fm radio receiver
FR2262809A1 (en) Interference suppression circuit for radar receivers - operates on different carrier frequencies little differing from each other