JPS5772437A - Infinite phase shifter - Google Patents

Infinite phase shifter

Info

Publication number
JPS5772437A
JPS5772437A JP55147772A JP14777280A JPS5772437A JP S5772437 A JPS5772437 A JP S5772437A JP 55147772 A JP55147772 A JP 55147772A JP 14777280 A JP14777280 A JP 14777280A JP S5772437 A JPS5772437 A JP S5772437A
Authority
JP
Japan
Prior art keywords
phase
frequency
output
deltaf
change
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
JP55147772A
Other languages
Japanese (ja)
Inventor
Bunichi Miyamoto
Takahiro Yokota
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55147772A priority Critical patent/JPS5772437A/en
Publication of JPS5772437A publication Critical patent/JPS5772437A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To obtain control signals from outputs of the first phase detector, which obtains a beat output between the output of a voltage controlled oscillator and that of a sine wave oscillator, and the second phase detector which obtains a beat output between the output of a 90 deg. phase shifter and that of the voltage controlled oscillator. CONSTITUTION:When a phase difference is generated in an IF signal to change the level in the input of an automatic phase control (APC), a frequency (f) of a voltage control oscillator VCO is changed in accordance with the magnitude and the polarity of this change to generate frequency diffrence DELTAf=f-f'. This DELTAf is converged to zero approximately finally by the operation of the APC system and a frequency discriminator FD, but the speed of this operation is low sufficiently for the change of the APC input; and consequently, control signals ix+, ix-, iy+, and iy- in orthogonal phase relations having the same frequency as DELTAf and constant amplitudes are outputted during this convergence and are applied to a phase shifting part SHT of an infinite phase shifter. The first phase detector PD1 takes out a beat output corresponding to the phase difference between frequencies (f) and f', and the second phase detector PD2 takes out the phase difference between the frequency (f) and the f' shifted 90 deg. in phase.
JP55147772A 1980-10-22 1980-10-22 Infinite phase shifter Pending JPS5772437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55147772A JPS5772437A (en) 1980-10-22 1980-10-22 Infinite phase shifter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55147772A JPS5772437A (en) 1980-10-22 1980-10-22 Infinite phase shifter

Publications (1)

Publication Number Publication Date
JPS5772437A true JPS5772437A (en) 1982-05-06

Family

ID=15437825

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55147772A Pending JPS5772437A (en) 1980-10-22 1980-10-22 Infinite phase shifter

Country Status (1)

Country Link
JP (1) JPS5772437A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63272216A (en) * 1987-04-30 1988-11-09 Fujitsu Ten Ltd Variable phase device
JPH02210915A (en) * 1989-02-10 1990-08-22 Nec Corp Automatic phase tracking circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63272216A (en) * 1987-04-30 1988-11-09 Fujitsu Ten Ltd Variable phase device
JPH02210915A (en) * 1989-02-10 1990-08-22 Nec Corp Automatic phase tracking circuit

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