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JPS554172A - Duplex branching filter device - Google Patents

Duplex branching filter device

Info

Publication number
JPS554172A
JPS554172A JP7730578A JP7730578A JPS554172A JP S554172 A JPS554172 A JP S554172A JP 7730578 A JP7730578 A JP 7730578A JP 7730578 A JP7730578 A JP 7730578A JP S554172 A JPS554172 A JP S554172A
Authority
JP
Japan
Prior art keywords
filter
receiving antenna
band
reception
duplex
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
JP7730578A
Other languages
Japanese (ja)
Other versions
JPS584500B2 (en
Inventor
Akira Mishima
Tsunao Kanebori
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP53077305A priority Critical patent/JPS584500B2/en
Publication of JPS554172A publication Critical patent/JPS554172A/en
Publication of JPS584500B2 publication Critical patent/JPS584500B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To lighten a load on a band-pass filter by improving the deterioration of the coupling attenuation value of a branching filter system attending on the connections between antennas and the mismatching of antennas, in a duplex branching filter which enables diversity reception by using a transmitting-receiving antenna and receiving antenna. CONSTITUTION:To one input line 42 of 1st directional filter 22 tuning to a transmission band, transmitter 21 is connected through transmission-band-pass filter 18, and resistive terminator 45 is to the other; and transmitting-receiving antenna 12 is connected to one output line 43 of filter 22 and one input line of 2nd directional filter 23 tuning to a reception is to the other. The other input line of this filter 23 is connected to receiving antenna 15, two fixed contacts 14a and 14b of diversity change-over switch 14 are connected to both the terminal of the output line of filter 23, and receiver 17 is connected to traveling contact 14c of this switch 14 through reception-band-pass filter 16.
JP53077305A 1978-06-24 1978-06-24 Transmission/reception demultiplexing device Expired JPS584500B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53077305A JPS584500B2 (en) 1978-06-24 1978-06-24 Transmission/reception demultiplexing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53077305A JPS584500B2 (en) 1978-06-24 1978-06-24 Transmission/reception demultiplexing device

Publications (2)

Publication Number Publication Date
JPS554172A true JPS554172A (en) 1980-01-12
JPS584500B2 JPS584500B2 (en) 1983-01-26

Family

ID=13630190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53077305A Expired JPS584500B2 (en) 1978-06-24 1978-06-24 Transmission/reception demultiplexing device

Country Status (1)

Country Link
JP (1) JPS584500B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62234721A (en) * 1986-03-01 1987-10-15 インダストリアス　テクノマチク　エス　エ− Sunvisor for novel automobile having improved structure
EP0268532A2 (en) * 1986-11-13 1988-05-25 Fujitsu Limited Signal processing circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62234721A (en) * 1986-03-01 1987-10-15 インダストリアス　テクノマチク　エス　エ− Sunvisor for novel automobile having improved structure
EP0268532A2 (en) * 1986-11-13 1988-05-25 Fujitsu Limited Signal processing circuit

Also Published As

Publication number Publication date
JPS584500B2 (en) 1983-01-26

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