GB633975A - Improvements in and relating to impedance matching indicators - Google Patents

Improvements in and relating to impedance matching indicators

Info

Publication number
GB633975A
GB633975A GB2799647A GB2799647A GB633975A GB 633975 A GB633975 A GB 633975A GB 2799647 A GB2799647 A GB 2799647A GB 2799647 A GB2799647 A GB 2799647A GB 633975 A GB633975 A GB 633975A
Authority
GB
United Kingdom
Prior art keywords
feeder
bridge
inductor
circuit
milliammeter
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.)
Expired
Application number
GB2799647A
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.)
HOWARD HARRY ROSENBROCK
General Electric Co PLC
Original Assignee
HOWARD HARRY ROSENBROCK
General Electric Co PLC
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
Priority to NL82617D priority Critical patent/NL82617C/xx
Priority to NL63288579A priority patent/NL142841B/en
Application filed by HOWARD HARRY ROSENBROCK, General Electric Co PLC filed Critical HOWARD HARRY ROSENBROCK
Priority to GB2799647A priority patent/GB633975A/en
Publication of GB633975A publication Critical patent/GB633975A/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
    • H03H7/38—Impedance-matching networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006—Transmitter or amplifier output circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

633,975. Measuring bridges. GENERAL ELECTRIC CO., Ltd., and ROSENBROCK, H. H. Oct. 20, 1947, No. 27996. [Class 37] The output circuit of a source such as a transmitter 10 is coupled through a feeder 12 and matching circuit 13 to a load such as an aerial 11. Circuit 13 includes a bridge composed of an inductor 17, resistance 18, inductor 19 and the input circuit of an auto-transformer 20. A milliammeter 21 is connected across one diagonal of the bridge, and the feeder 12 is connected across the other diagonal. The bridge is arranged to be balanced when the input impedance of transformer 20 is resistive and equal to the characteristic impedance of feeder 12. Any departure from the matched condition will give a deflection on milliammeter 21. As elements 17, 18 are in shunt to feeder 12 they are given high values. Inductor 19 is in series with feeder 12 and its effect is reduced by winding it in an opposed sense to winding 17 on a common dust core 22. This increases the sensitivity of the bridge. By including some reactance in element 18, it is possible to match a corresponding reactance in the load. To reduce power losses the resistance of 18 is made as large as is consistent with maintaining a satisfactory out - of - balance current through meter 21.
GB2799647A 1947-10-20 1947-10-20 Improvements in and relating to impedance matching indicators Expired GB633975A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL82617D NL82617C (en) 1947-10-20
NL63288579A NL142841B (en) 1947-10-20 ELECTRIC MOTOR INTENDED TO BE IMMERSED VERTICAL IN LIQUID WITH THE SHAFT.
GB2799647A GB633975A (en) 1947-10-20 1947-10-20 Improvements in and relating to impedance matching indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2799647A GB633975A (en) 1947-10-20 1947-10-20 Improvements in and relating to impedance matching indicators

Publications (1)

Publication Number Publication Date
GB633975A true GB633975A (en) 1949-12-30

Family

ID=10268601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2799647A Expired GB633975A (en) 1947-10-20 1947-10-20 Improvements in and relating to impedance matching indicators

Country Status (2)

Country Link
GB (1) GB633975A (en)
NL (2) NL142841B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775707A (en) * 1972-11-06 1973-11-27 Collins Radio Co Method and means for antenna coupling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775707A (en) * 1972-11-06 1973-11-27 Collins Radio Co Method and means for antenna coupling

Also Published As

Publication number Publication date
NL82617C (en)
NL142841B (en)

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