JPS57204603A - Branch coupler - Google Patents

Branch coupler

Info

Publication number
JPS57204603A
JPS57204603A JP8946581A JP8946581A JPS57204603A JP S57204603 A JPS57204603 A JP S57204603A JP 8946581 A JP8946581 A JP 8946581A JP 8946581 A JP8946581 A JP 8946581A JP S57204603 A JPS57204603 A JP S57204603A
Authority
JP
Japan
Prior art keywords
length
point
branch coupler
equivalent
resonators
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
JP8946581A
Other languages
Japanese (ja)
Inventor
Takanori Utano
Hiroshi Hatanaka
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 DENGIYOU KOSAKU KK
Nihon Dengyo Kosaku Co Ltd
NTT Inc
Original Assignee
NIPPON DENGIYOU KOSAKU KK
Nippon Telegraph and Telephone Corp
Nihon Dengyo Kosaku 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 NIPPON DENGIYOU KOSAKU KK, Nippon Telegraph and Telephone Corp, Nihon Dengyo Kosaku Co Ltd filed Critical NIPPON DENGIYOU KOSAKU KK
Priority to JP8946581A priority Critical patent/JPS57204603A/en
Publication of JPS57204603A publication Critical patent/JPS57204603A/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)

Abstract

PURPOSE:To ensure a degree of freedom for the structure of a branch coupler and a resonator without imparing the electric characteristics, by inserting a reactive compensating circuit between the earth point and the branching point of a branch coupler. CONSTITUTION:When a sufficient difference is secured for the resonance frequency among the resonators 8, other resonators are substantially short-circuited in terms of the resonance frequency of one resonator. The equivalent admittance is capacitive or inductive in accordance with the length l3+l4, where l3 is the equivalent electric length from a branching point 13 to a terminal 10 and l4 is the internal equivalent electric length 14 respectively. In this connection, a reactance element 15 is inserted between the point 13 and the earth point. Thus a resonance circuit of a low Q is formed with the equivalent admittance due to the length l3 and l4. Thus the loss of transmission can be reduced.
JP8946581A 1981-06-12 1981-06-12 Branch coupler Pending JPS57204603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8946581A JPS57204603A (en) 1981-06-12 1981-06-12 Branch coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8946581A JPS57204603A (en) 1981-06-12 1981-06-12 Branch coupler

Publications (1)

Publication Number Publication Date
JPS57204603A true JPS57204603A (en) 1982-12-15

Family

ID=13971451

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8946581A Pending JPS57204603A (en) 1981-06-12 1981-06-12 Branch coupler

Country Status (1)

Country Link
JP (1) JPS57204603A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6460004A (en) * 1987-08-31 1989-03-07 Oki Electric Ind Co Ltd Branching filter
US5015973A (en) * 1987-08-31 1991-05-14 Oki Electric Industry Co., Ltd. Duplexer with an isolating circuit on a dielectric plate
JPH0529806A (en) * 1991-07-19 1993-02-05 Nec Corp Branching and synthesizing device
JPH0555809A (en) * 1991-08-27 1993-03-05 Murata Mfg Co Ltd Filter circuit
US5323127A (en) * 1990-07-27 1994-06-21 Oki Electric Industry Co., Ltd. Branching filter having specific impedance and admittance characteristics
EP0788182A3 (en) * 1991-03-25 1997-08-27 Sanyo Electric Co

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57136812A (en) * 1981-02-17 1982-08-24 Matsushita Electric Ind Co Ltd High frequency branching synthesizer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57136812A (en) * 1981-02-17 1982-08-24 Matsushita Electric Ind Co Ltd High frequency branching synthesizer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6460004A (en) * 1987-08-31 1989-03-07 Oki Electric Ind Co Ltd Branching filter
US5015973A (en) * 1987-08-31 1991-05-14 Oki Electric Industry Co., Ltd. Duplexer with an isolating circuit on a dielectric plate
US5323127A (en) * 1990-07-27 1994-06-21 Oki Electric Industry Co., Ltd. Branching filter having specific impedance and admittance characteristics
EP0788182A3 (en) * 1991-03-25 1997-08-27 Sanyo Electric Co
JPH0529806A (en) * 1991-07-19 1993-02-05 Nec Corp Branching and synthesizing device
JPH0555809A (en) * 1991-08-27 1993-03-05 Murata Mfg Co Ltd Filter circuit

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