GB1285660A - Improvements in or relating to high frequency electromagnetic wave circulators - Google Patents

Improvements in or relating to high frequency electromagnetic wave circulators

Info

Publication number
GB1285660A
GB1285660A GB51430/70A GB5143070A GB1285660A GB 1285660 A GB1285660 A GB 1285660A GB 51430/70 A GB51430/70 A GB 51430/70A GB 5143070 A GB5143070 A GB 5143070A GB 1285660 A GB1285660 A GB 1285660A
Authority
GB
United Kingdom
Prior art keywords
capacitance
conductors
plane
circulation
strips
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
GB51430/70A
Inventor
Reinhard Heinrich Knerr
Daniel John Thibault
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1285660A publication Critical patent/GB1285660A/en
Expired 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
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/38—Circulators
    • H01P1/383—Junction circulators, e.g. Y-circulators
    • H01P1/387—Strip line circulators

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

1285660 Circulators WESTERN ELECTRIC CO Inc 29 Oct 1970 [3 Nov 1969] 51430/70 Heading H1W A circulator comprises three strip conductors 11, 12, 13 intermeshing at 120 degrees with each other in the vicinity of a ferrite element 14, the ends of the strips remote from their input/output ends being interconnected and coupled to earth by a common capacitance. As shown, the central portion of each of the three strips is divided into two conductors e.g. 21, 22, and the pairs of conductors are intermeshed in a symmetrical fashion by bridge pieces 28 and insulators 27 provided at the crossing points. The remote end of each strip is connected by a conductor 15 to an intermediate plane 16 and a variable capacitance established between plane 16 and ground plane 17 by means of a movable plate 31. This capacitance is denoted 51 and the three input ports denoted 1, 2, 3 in the diagram of Fig. 5. The capacitance may be used to adjust the frequency of operation of the circulator. Further, it is shown in the Specification that a change in capacitance may be used to reverse the direction of circulation of the device. A varactor diode 52 may be used to effect switching between two values of capacitance corresponding to opposite directions of circulation.
GB51430/70A 1969-11-03 1970-10-29 Improvements in or relating to high frequency electromagnetic wave circulators Expired GB1285660A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87337269A 1969-11-03 1969-11-03

Publications (1)

Publication Number Publication Date
GB1285660A true GB1285660A (en) 1972-08-16

Family

ID=25361510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51430/70A Expired GB1285660A (en) 1969-11-03 1970-10-29 Improvements in or relating to high frequency electromagnetic wave circulators

Country Status (8)

Country Link
US (1) US3605040A (en)
JP (1) JPS509661B1 (en)
BE (1) BE758313A (en)
DE (1) DE2053677C3 (en)
FR (1) FR2071862A5 (en)
GB (1) GB1285660A (en)
NL (1) NL173457C (en)
SE (1) SE364400B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890582A (en) * 1973-06-15 1975-06-17 Addington Lab Inc Floating-ground microwave ferrite isolators
US3836874A (en) * 1973-06-25 1974-09-17 Hitachi Ltd Lumped element circulator
JPS608643B2 (en) * 1976-12-24 1985-03-05 日本電気株式会社 circulator
FR2418967A1 (en) * 1978-03-03 1979-09-28 Lignes Telegraph Telephon CIRCULATOR WITH LOCATED ELEMENTS WITH ADJUSTABLE BAND ENLARGEMENT CIRCUIT
JPH01198802A (en) * 1987-10-07 1989-08-10 Murata Mfg Co Ltd Irreversible circuit element
US5017894A (en) * 1989-02-01 1991-05-21 Hitachi Ferrite, Ltd. Lumped constant non-reciprocal circuit element
JP3807071B2 (en) * 1997-12-08 2006-08-09 Ｔｄｋ株式会社 Non-reciprocal circuit element
JP4724152B2 (en) 2006-08-31 2011-07-13 株式会社エヌ・ティ・ティ・ドコモ Non-reciprocal circuit element
JP5089567B2 (en) 2008-02-20 2012-12-05 株式会社エヌ・ティ・ティ・ドコモ Non-reciprocal circuit element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165711A (en) * 1960-06-10 1965-01-12 Bendix Corp Anisotropic circulator with dielectric posts adjacent the strip line providing discontinuity for minimizing reflections
US3335374A (en) * 1964-05-14 1967-08-08 Japan Broadcasting Corp Lumped element y circulator
US3334318A (en) * 1964-12-05 1967-08-01 Mitsubishi Electric Corp Stripline circulator having means causing electrostatic capacitance between adjacent pairs of terminals to be substantially equal to each other
DE1282754B (en) * 1966-03-28 1968-11-14 Siemens Ag Circulator with concentrated switching elements for short electromagnetic waves

Also Published As

Publication number Publication date
BE758313A (en) 1971-04-01
JPS509661B1 (en) 1975-04-15
DE2053677C3 (en) 1982-02-11
DE2053677B2 (en) 1981-06-25
FR2071862A5 (en) 1971-09-17
US3605040A (en) 1971-09-14
NL173457C (en) 1984-01-16
NL7015801A (en) 1971-05-05
DE2053677A1 (en) 1971-05-13
SE364400B (en) 1974-02-18
NL173457B (en) 1983-08-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee