US3838361A - STRIP-LINE CIRCULATOR FOR THE FREQUENCY RANGE FROM 10 TO 1,000 MHz - Google Patents

STRIP-LINE CIRCULATOR FOR THE FREQUENCY RANGE FROM 10 TO 1,000 MHz Download PDF

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Publication number
US3838361A
US3838361A US00397611A US39761173A US3838361A US 3838361 A US3838361 A US 3838361A US 00397611 A US00397611 A US 00397611A US 39761173 A US39761173 A US 39761173A US 3838361 A US3838361 A US 3838361A
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Prior art keywords
strip
circulator
conductors
conductor
line circulator
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Expired - Lifetime
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US00397611A
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English (en)
Inventor
F Potzl
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US Philips Corp
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US Philips Corp
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    • 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

Definitions

  • ABSTRACT The strip-line circulator comprises three coplanar con- [30] Foreign Application Priority Data ductors bent about 120 and symmetrically arranged Oct. 6, 1972 Germany 2249180 in a Spaced relationship from one another about a common central area on a gyromagnetic coupling 52 U.S. Cl. ..333/1.1,333/84 M disc. v [51] Int. Cl.
  • the invention relates to a strip-line circulator for the frequency range from 10 to L000 MHZ comprising three two-terminal coplanar connections mutually staggered through l for supplying high-frequency electromagnetic waves, which terminals are each connected through a conductor to a common coupling space filled with a gyromagnetic material.
  • FIG. 3 of the latter specification shows the known conventional housing.
  • the striplines are provided between the discs made of a gyromagnetic material, which are generally referred to as microwave ferrite discs.
  • This known arrangement further comprises the striplines and the coplanar terminals mutually staggered through 120.
  • the known circulators are unsuitable for use at comparatively high powers because of the tendency to break down at the crossings.
  • the circulator according to the invention is characterized in that the three conductors consist of identical coplanar strip conductors which bypass one another.
  • Each conductor may be divided into at least two ad jacent current paths. Furthermore each conductor or each current path may consist of a flat tube through which a coolant flows.
  • the adjacent conductors enable the height of the construction in the airgap to be a minimum.
  • the arrangement provides the conditions for constructing a circulator for the transmission of comparatively large powers, for owing to the fact that in the coupling space crossings are completely avoided a conductor or a current path may take the shape of a flat tube, for example, a tube of rectangular section, through which a coolant flows to prevent inadmissible heating of the respective components.
  • the device is capable of withstanding higher voltages than has been the case so far.
  • the known circulators for large powers have comparatively large spacings between the crossing conductors or current paths owing to the comparatively high voltages used. Since crossings are avoided, these comparatively large spacings between the conductors are readily obtainable and adjacent conductors or current paths may be used without the characteristics of the circulator in respect of insertion loss, bandwidth backward isolation and the like being adversely affected.
  • FIG. 1 shows an embodiment of a circulator according to the invention
  • FIG. 2 shows another embodiment of a circulator according to the invention
  • FIG. 3 is a graph showing the insertion loss and isolation of a circulator according to the invention as a function of the frequency.
  • the circulator comprises a housing known in the art and hence not'described in further detail.
  • the housing may have the shape shown, for example, in FIG. 3 of the German Pat. No. 1,282,754 or in FIG. 4b of the US Pat. No. 3,335,374.
  • FIG. 1 is a plan view of a microwave ferrite disc 1.
  • Three conductors 2 are provided on the disc which have terminals which are mutually staggered through
  • the conductors may be terminated by connection to a common refer ence point (common earth) 5 by means of terminals or soldered connections. However, it is not necessary for the conductors to be connected to the common reference point 5. They may alternatively be connected to a common reactive element.
  • Each terminal comprises a device 3 which includes a matching network.
  • the matching networks are connected to coaxial plugs shown schematically by 4.
  • the magnetic field extends at right angles to the largest dimensions of the conductors 2, as is indicated at 7.
  • this circulator has the advantage that crossings of the conductor 2 are avoided and the conductors are spaced from one another by a distance 6 which is determined in accordance with the required breakdown strength.
  • the advantage of the arrangement consists in a very small structural height of the aforementioned space between the discs of gyromagnetic material. As a result, the stray inductances also may considerably be reduced.
  • the magnetic field shown at 7 is the static magnetic field.
  • the conductors shown in FIGS. 1 and 2 may be strip-lines cut from metal sheet or may be obtained by selective etching of copper coating on insulating substrates.
  • FIG. 2 shows a circulator in which the conductors 2 are each subdivided into two current paths 8. These current paths 8 furthermore are arcuate. Otherwise the circulator of FIG. 2 is identical to that shown in FIG. 1.
  • FIG. 3 shows the characteristic curve of the circula' tor according to the invention, the attenuation in dB being plotted versus the frequency in MHz.
  • a curve 9 shows the isolation and a curve 10 the insertion loss, both as a function of the frequency.
  • the insertion loss is substantially constant between a frequency designated by 11, which for example, corresponds to I20 and in spaced relationship from one another, whereby said apex portions being directed to a common central area on said coupling means.
  • Strip-line circulator as claimed in claim 1 characterized in that each conductor is divided into at least two adjacent current paths.
  • each conductor comprises a flat tube for the passage of a coolant.

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  • Non-Reversible Transmitting Devices (AREA)
US00397611A 1972-10-06 1973-09-14 STRIP-LINE CIRCULATOR FOR THE FREQUENCY RANGE FROM 10 TO 1,000 MHz Expired - Lifetime US3838361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2249180A DE2249180C3 (de) 1972-10-06 1972-10-06 Zirkulator für den Frequenzbereich von 10 bis 1000 MHz in konzentrierter Bauweise

Publications (1)

Publication Number Publication Date
US3838361A true US3838361A (en) 1974-09-24

Family

ID=5858393

Family Applications (1)

Application Number Title Priority Date Filing Date
US00397611A Expired - Lifetime US3838361A (en) 1972-10-06 1973-09-14 STRIP-LINE CIRCULATOR FOR THE FREQUENCY RANGE FROM 10 TO 1,000 MHz

Country Status (6)

Country Link
US (1) US3838361A (en, 2012)
JP (1) JPS5523481B2 (en, 2012)
DE (1) DE2249180C3 (en, 2012)
FR (1) FR2202375B3 (en, 2012)
GB (1) GB1439680A (en, 2012)
NL (1) NL7313506A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021524A1 (en) * 2002-02-19 2004-02-05 Shinji Yamamoto Non-reciprocal circuit device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341789A (en) * 1965-04-19 1967-09-12 Bendix Corp Latching ferrite circulator having the ferrite symmetrically located with respect toeach rf signal carrying arm
US3538459A (en) * 1969-02-03 1970-11-03 Bell Telephone Labor Inc Thin film y-junction circulator having significant shunt capacitance associated with each center conductor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335374A (en) * 1964-05-14 1967-08-08 Japan Broadcasting Corp Lumped element y circulator
DE1282754B (de) * 1966-03-28 1968-11-14 Siemens Ag Zirkulator mit konzentrierten Schaltelementen fuer kurze elektromagnetische Wellen
JPS4833344B1 (en, 2012) * 1967-05-11 1973-10-13
US3510804A (en) * 1968-05-29 1970-05-05 Tdk Electronics Co Ltd Lumped parameter circulator and its construction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341789A (en) * 1965-04-19 1967-09-12 Bendix Corp Latching ferrite circulator having the ferrite symmetrically located with respect toeach rf signal carrying arm
US3538459A (en) * 1969-02-03 1970-11-03 Bell Telephone Labor Inc Thin film y-junction circulator having significant shunt capacitance associated with each center conductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021524A1 (en) * 2002-02-19 2004-02-05 Shinji Yamamoto Non-reciprocal circuit device
US6844790B2 (en) * 2002-02-19 2005-01-18 Hitachi Metals, Ltd. Non-reciprocal circuit device

Also Published As

Publication number Publication date
JPS4974461A (en, 2012) 1974-07-18
FR2202375B3 (en, 2012) 1976-08-27
DE2249180A1 (de) 1974-04-11
JPS5523481B2 (en, 2012) 1980-06-23
FR2202375A1 (en, 2012) 1974-05-03
GB1439680A (en) 1976-06-16
DE2249180C3 (de) 1981-04-23
DE2249180B2 (de) 1980-07-31
NL7313506A (en, 2012) 1974-04-09

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