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JPS55130201A - Directional coupler - Google Patents

Directional coupler

Info

Publication number
JPS55130201A
JPS55130201A JP3732779A JP3732779A JPS55130201A JP S55130201 A JPS55130201 A JP S55130201A JP 3732779 A JP3732779 A JP 3732779A JP 3732779 A JP3732779 A JP 3732779A JP S55130201 A JPS55130201 A JP S55130201A
Authority
JP
Japan
Prior art keywords
terminal
voltage
current
flows
occurs
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
JP3732779A
Other languages
Japanese (ja)
Other versions
JPS5932922B2 (en
Inventor
Tomomasa Muta
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.)
DKK Co Ltd
Original Assignee
Denki Kogyo 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 Denki Kogyo Co Ltd filed Critical Denki Kogyo Co Ltd
Priority to JP3732779A priority Critical patent/JPS5932922B2/en
Publication of JPS55130201A publication Critical patent/JPS55130201A/en
Publication of JPS5932922B2 publication Critical patent/JPS5932922B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
    • H03H7/487—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source particularly adapted as coupling circuit between transmitters and antennas

Landscapes

  • Transmitters (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To decrease the insertion loss and increase both the transmission and VSWR characteristics by securing intervention of one unit of the transformer to the transmission line of the power. CONSTITUTION:The transmitter and the antenna are connected to terminal a and terminal b each, and the winding ratio is set to 1:n between the first and secondary windings of current transformer CT. And when current i0 flows between terminals a and b, i0/n occurs to the secondary side. Then the current of i0/2n flows to each resistance under the relation of R1=R2=R3=R4=R. If the load of terminal b is set to R0, the voltage of R0i0 occurs at terminal b. And the voltage of R0i0/n occurs between secondary windings d and d' as well as c and c' when the winding ratio is set to n:1 for the windings between transformers PT1 and PT2. And then the current of R0i0/2Rn flows to resistances R1.R2 and R3.R4 each in the direction of the dotted line arrows. Here if R0=R is satisfied, the offset is cuased between the secondary current of CT and PT1/PT2 via resistance R1. Thus the voltage becomes 0 for terminal d at the matching time of the antenna system. On the other hand, the voltage of terminal c shows the voltage which is proportional to the output voltage of the transmitter with resistance R4 owing to the piling.
JP3732779A 1979-03-29 1979-03-29 directional coupler Expired JPS5932922B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3732779A JPS5932922B2 (en) 1979-03-29 1979-03-29 directional coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3732779A JPS5932922B2 (en) 1979-03-29 1979-03-29 directional coupler

Publications (2)

Publication Number Publication Date
JPS55130201A true JPS55130201A (en) 1980-10-08
JPS5932922B2 JPS5932922B2 (en) 1984-08-11

Family

ID=12494545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3732779A Expired JPS5932922B2 (en) 1979-03-29 1979-03-29 directional coupler

Country Status (1)

Country Link
JP (1) JPS5932922B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998079A (en) * 1990-01-16 1991-03-05 Plessey Electronic Systems Corp. Bi-directional signal coupler for a balanced data transmission line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998079A (en) * 1990-01-16 1991-03-05 Plessey Electronic Systems Corp. Bi-directional signal coupler for a balanced data transmission line

Also Published As

Publication number Publication date
JPS5932922B2 (en) 1984-08-11

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