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JPS5760704A - Branching filter for space diversity - Google Patents

Branching filter for space diversity

Info

Publication number
JPS5760704A
JPS5760704A JP55135582A JP13558280A JPS5760704A JP S5760704 A JPS5760704 A JP S5760704A JP 55135582 A JP55135582 A JP 55135582A JP 13558280 A JP13558280 A JP 13558280A JP S5760704 A JPS5760704 A JP S5760704A
Authority
JP
Japan
Prior art keywords
line
lambda
filters
transmission
receiving
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
JP55135582A
Other languages
Japanese (ja)
Inventor
Bunichi Miyamoto
Aki Meguro
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 JP55135582A priority Critical patent/JPS5760704A/en
Publication of JPS5760704A publication Critical patent/JPS5760704A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To break the influence between transmission and receiving waves, by L (electromagnetic field) or C (electric field)-connecting filters for transmission and receiving and lines and setting the line length between filters and switches to an integer of lambda/14 for the purpose of stopping the transfer of signal energy to filters in attenuation bands of filters. CONSTITUTION:The output side of a transmission-side BPF9 is connected to a coaxial line l1 of electric length lambda/4 in L (electromagnetic field). This line l1 is connected to not only a main antenna 1 but also a coaxial line l3 of lambda/4 and a diode switch D1 connected in parallel to the line through a coaxial line l2 of electric length lambda/4. Meanwhile, a receiving-side band pass filter 10 has a pass frequency band different from that of the filter 9, and the input side is connected to a coaxial line l4 of electric length lambda/4 and the line l3 in C (electric field), and the line l4 is connected to a subantenna 3 through a diode switch D2 connected in parallel to the line.
JP55135582A 1980-09-29 1980-09-29 Branching filter for space diversity Pending JPS5760704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135582A JPS5760704A (en) 1980-09-29 1980-09-29 Branching filter for space diversity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135582A JPS5760704A (en) 1980-09-29 1980-09-29 Branching filter for space diversity

Publications (1)

Publication Number Publication Date
JPS5760704A true JPS5760704A (en) 1982-04-12

Family

ID=15155182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135582A Pending JPS5760704A (en) 1980-09-29 1980-09-29 Branching filter for space diversity

Country Status (1)

Country Link
JP (1) JPS5760704A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360628A (en) * 1986-08-30 1988-03-16 Nec Corp Portable radio equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6360628A (en) * 1986-08-30 1988-03-16 Nec Corp Portable radio equipment

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