JPS6449439A - Transmitter/receiver for space station - Google Patents

Transmitter/receiver for space station

Info

Publication number
JPS6449439A
JPS6449439A JP20518387A JP20518387A JPS6449439A JP S6449439 A JPS6449439 A JP S6449439A JP 20518387 A JP20518387 A JP 20518387A JP 20518387 A JP20518387 A JP 20518387A JP S6449439 A JPS6449439 A JP S6449439A
Authority
JP
Japan
Prior art keywords
antenna
transmitter
switch
reception power
receiver
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
JP20518387A
Other languages
Japanese (ja)
Inventor
Tatsuo Yamagishi
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
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 filed Critical NEC Corp
Priority to JP20518387A priority Critical patent/JPS6449439A/en
Publication of JPS6449439A publication Critical patent/JPS6449439A/en
Pending legal-status Critical Current

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Landscapes

  • Radio Relay Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To always perform communication in the optimum line state, by switching and connecting a transmitter to an antenna with a high reception level in plural antennas by a switch change-over signal. CONSTITUTION:When a part of signals received by receivers 5 and 6 via the antennas 1 and 2 is outputted to a switch controller 7 as reception power monitor signals S1 and S2, the controller 7 compares the reception power monitor signals of the receivers 5 and 6 with each other. And it generates the switch change-over signal S3 to control a switch 9 so as to the transmission signal of the transmitter 8 to an antenna system to which the receiver with high reception power is connected. In such a way, the switch 9 connects the transmitter 8 to the diplexer 3 or 4 of the antenna 1 or 2 with the high reception power, and the signal is transmitted via the antenna 1 or 2. Thereby, a space station side can select the optimum antenna automatically without necessitating a command from a ground station.
JP20518387A 1987-08-20 1987-08-20 Transmitter/receiver for space station Pending JPS6449439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20518387A JPS6449439A (en) 1987-08-20 1987-08-20 Transmitter/receiver for space station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20518387A JPS6449439A (en) 1987-08-20 1987-08-20 Transmitter/receiver for space station

Publications (1)

Publication Number Publication Date
JPS6449439A true JPS6449439A (en) 1989-02-23

Family

ID=16502787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20518387A Pending JPS6449439A (en) 1987-08-20 1987-08-20 Transmitter/receiver for space station

Country Status (1)

Country Link
JP (1) JPS6449439A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02250435A (en) * 1989-03-23 1990-10-08 Nippondenso Co Ltd On-vehicle communication equipment
JPH0730470A (en) * 1993-07-14 1995-01-31 Nec Corp Antenna switching system for artificial sattelite
JPH09222472A (en) * 1996-02-16 1997-08-26 Nec Corp Controller for pilotless aircraft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02250435A (en) * 1989-03-23 1990-10-08 Nippondenso Co Ltd On-vehicle communication equipment
JPH0730470A (en) * 1993-07-14 1995-01-31 Nec Corp Antenna switching system for artificial sattelite
JPH09222472A (en) * 1996-02-16 1997-08-26 Nec Corp Controller for pilotless aircraft

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