JPS551721A - Multiplex radio unit - Google Patents

Multiplex radio unit

Info

Publication number
JPS551721A
JPS551721A JP7402478A JP7402478A JPS551721A JP S551721 A JPS551721 A JP S551721A JP 7402478 A JP7402478 A JP 7402478A JP 7402478 A JP7402478 A JP 7402478A JP S551721 A JPS551721 A JP S551721A
Authority
JP
Japan
Prior art keywords
signal
fed
amplification
electric
pass filter
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
JP7402478A
Other languages
Japanese (ja)
Inventor
Nijiro Momo
Takuro Oguchi
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 JP7402478A priority Critical patent/JPS551721A/en
Publication of JPS551721A publication Critical patent/JPS551721A/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

Abstract

PURPOSE:To enable to easily install separately the high frequency part and the MODEM part, by using optical fibers for the transmission of IF signal between the high frequency and MODEM part. CONSTITUTION:The micro wave reception signal inputted to the reception antenna 11 is rejected for unnecessary components with the band pass filter 12, and fed to one input of the frequency converter 14 after EF amplification 13 and mixed with the signal from the reception local oscillator 15 fed to another input. The IF signal developed at the output of the converter 14 is fed to the light emitting element 17 after amplification 16 and electric-photo conversion is made. The light output developed is transmitted via the optecal fiber 18, it is hohto-electric converted at the photo detection element 19 to cause electric IF signal again. It is FM demodulated at the demodulator 21 and outputted from the terminal 22 after IF amplification 20. On the other hand, the modulation input inputted from the terminal 31 is fed to the modulator 32 and transmitted from the transmission antenna 42 via inverse path, after rejecting unnecessary components at the band pass filter 41.
JP7402478A 1978-06-19 1978-06-19 Multiplex radio unit Pending JPS551721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7402478A JPS551721A (en) 1978-06-19 1978-06-19 Multiplex radio unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7402478A JPS551721A (en) 1978-06-19 1978-06-19 Multiplex radio unit

Publications (1)

Publication Number Publication Date
JPS551721A true JPS551721A (en) 1980-01-08

Family

ID=13535132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7402478A Pending JPS551721A (en) 1978-06-19 1978-06-19 Multiplex radio unit

Country Status (1)

Country Link
JP (1) JPS551721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108337049A (en) * 2017-01-19 2018-07-27 罗德施瓦兹两合股份有限公司 System and method for handling electromagnetic signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108337049A (en) * 2017-01-19 2018-07-27 罗德施瓦兹两合股份有限公司 System and method for handling electromagnetic signal

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