JPS57193139A - Harmonic transmitting and receiving system with high sensitivity - Google Patents

Harmonic transmitting and receiving system with high sensitivity

Info

Publication number
JPS57193139A
JPS57193139A JP56079852A JP7985281A JPS57193139A JP S57193139 A JPS57193139 A JP S57193139A JP 56079852 A JP56079852 A JP 56079852A JP 7985281 A JP7985281 A JP 7985281A JP S57193139 A JPS57193139 A JP S57193139A
Authority
JP
Japan
Prior art keywords
frequency
route
output
fundamental
multiplied
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
JP56079852A
Other languages
Japanese (ja)
Other versions
JPS6322649B2 (en
Inventor
Yutaka Horiguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56079852A priority Critical patent/JPS57193139A/en
Publication of JPS57193139A publication Critical patent/JPS57193139A/en
Publication of JPS6322649B2 publication Critical patent/JPS6322649B2/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
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To obtain a reception system with low cost and high sensitivity without a highly stable oscillator, by transmitting a signal in N-multiplied frequency and a fundamental frequency from a transmission on section, receiving the signal at a reception section, and mixing the signal with a local oscillating frequency for multiplication. CONSTITUTION:In a radio communication in a microwave or milliwave band, the output of an oscillation 1 in a fundamental frequency fs is divided into two, a fundamental wave route A and a harmonic wave route B, and the electromagnetic waves of the route A are radiated from a fundamental wave transmission antenna 3 and the waves on the route B are multiplied by N and radiated from a harmonic wave transmission antenna 4. The fundamental wave is received at an antenna 5 at the reception section, the wave is converted into an intermediate frequency fIF=fs-fL with a frequency fL from a local oscillator 9 and multiplied by N at a multiplier 11 via a limiter 10. The output of the multiplier 11 is mixed with the output of a reference oscillator 13 in frequency f0 at a mixer 12 for shift and the output frequency fx becomes fx=N(fs-fL)-f0. The harmonic waves are received at an antenna 6 and converted into fIPM=N(fs-fL), mixed with the frequency fx at a mixer 14 and converted into fIPM-fx=f0. High stability can be obtained by selecting the f0 in the VHF band.
JP56079852A 1981-05-25 1981-05-25 Harmonic transmitting and receiving system with high sensitivity Granted JPS57193139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079852A JPS57193139A (en) 1981-05-25 1981-05-25 Harmonic transmitting and receiving system with high sensitivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079852A JPS57193139A (en) 1981-05-25 1981-05-25 Harmonic transmitting and receiving system with high sensitivity

Publications (2)

Publication Number Publication Date
JPS57193139A true JPS57193139A (en) 1982-11-27
JPS6322649B2 JPS6322649B2 (en) 1988-05-12

Family

ID=13701721

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079852A Granted JPS57193139A (en) 1981-05-25 1981-05-25 Harmonic transmitting and receiving system with high sensitivity

Country Status (1)

Country Link
JP (1) JPS57193139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842117A (en) * 1993-07-09 1998-11-24 Ant Nachrichtentechnick Gmbh Mobile radio aerial installation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842117A (en) * 1993-07-09 1998-11-24 Ant Nachrichtentechnick Gmbh Mobile radio aerial installation

Also Published As

Publication number Publication date
JPS6322649B2 (en) 1988-05-12

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