JPS57185735A - Portable heterodyne transmitter and receiver - Google Patents

Portable heterodyne transmitter and receiver

Info

Publication number
JPS57185735A
JPS57185735A JP56070216A JP7021681A JPS57185735A JP S57185735 A JPS57185735 A JP S57185735A JP 56070216 A JP56070216 A JP 56070216A JP 7021681 A JP7021681 A JP 7021681A JP S57185735 A JPS57185735 A JP S57185735A
Authority
JP
Japan
Prior art keywords
squeltch
antenna
power
amplifier
microwave
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
JP56070216A
Other languages
Japanese (ja)
Inventor
Norio Takahashi
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 JP56070216A priority Critical patent/JPS57185735A/en
Publication of JPS57185735A publication Critical patent/JPS57185735A/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
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

PURPOSE:To reduce power consumption and to eliminate the need for a squeltch changeover switch, by interrupting the power supply to a microwave power amplifying section at squeltch operation. CONSTITUTION:A microwave signal received at an antenna 1 is converted into an intermediate frequency band at a converter 11 and applied to an AGC voltage generating circuit 12 in common use for intermediate frequency amplifier. If a reception signal is interrupted owing to any failure, a suitable AGC voltage is not generated in the said circuit 12 and a squeltch detecting circuit 18 is operative. At this state, the point (a) is at zero potential, a transistor TR1 of a control section 21 turns off and the potential at the point C is zero. Thus, since the power supply to a microwave power amplifier 17 is interrupted, the amplifier 17 at this state (at failure taken place) consumes no power. At a normal state, a microwave signal received at the antenna 1 is heterodyne-relay-amplified and transmitted to a succeeding reception section via an antenna 2.
JP56070216A 1981-05-12 1981-05-12 Portable heterodyne transmitter and receiver Pending JPS57185735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56070216A JPS57185735A (en) 1981-05-12 1981-05-12 Portable heterodyne transmitter and receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070216A JPS57185735A (en) 1981-05-12 1981-05-12 Portable heterodyne transmitter and receiver

Publications (1)

Publication Number Publication Date
JPS57185735A true JPS57185735A (en) 1982-11-16

Family

ID=13425111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070216A Pending JPS57185735A (en) 1981-05-12 1981-05-12 Portable heterodyne transmitter and receiver

Country Status (1)

Country Link
JP (1) JPS57185735A (en)

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