US3522555A - Junction circulator wherein each center conductor leg appears on both sides of the insulation board - Google Patents

Junction circulator wherein each center conductor leg appears on both sides of the insulation board Download PDF

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Publication number
US3522555A
US3522555A US726986A US3522555DA US3522555A US 3522555 A US3522555 A US 3522555A US 726986 A US726986 A US 726986A US 3522555D A US3522555D A US 3522555DA US 3522555 A US3522555 A US 3522555A
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United States
Prior art keywords
circulator
sides
insulating plate
insulation board
center conductor
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Expired - Lifetime
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US726986A
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English (en)
Inventor
Tadashi Hashimoto
Taro Miura
Takashi Iwata
Masanori Sasaki
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TDK Corp
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TDK 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

  • This invention relates to a printed circulator which is stable in the operation and can be made at a low cost.
  • 2 is a central conductor
  • 3 is a shielding case
  • 4 is a
  • the condenser 5 is a magnet for providing a magnetic field to the magnetic material 1 for high frequencies
  • 6 is a connector for an input or output
  • 7 is a housing.
  • the central conductor 2 is, as shown in FIG. 2, of a construction wherein three element conductors A, B and C electrically insulated from one another are knitted in the form of meshes. In each construction, there are certain limits to the insulation of the central conductor and to the precision in the case of knitting the element conductors together in the form of meshes. The nonuniformity of this knitted geometrical arrangement has been a cause of deteriorating the characteristics of a circulator. Further, as shown in FIG. 1, the condenser 4 is connected in order to form a circulator.
  • the frequency band is of VHF of more than 30 to 300 megacycles
  • the length of the lead Wire for connecting the condenser and the arrangement of the condensers will influence the characteristics of the circulator. Therefore, if the connection is nonuniform, it will be a cause of deteriorating the characteristics.
  • the capacity value of the condenser has been varied in various manners. But, due to the time required for the control, the cost has become rather high.
  • An object of the present invention is to provide a circulator which is low in the fluctuation of characteristics and can be made at a low cost.
  • FIG. 1 is a sectioned view of a conventional circulator.
  • FIG. 2 is an arrangement view of a conventional central conductor.
  • FIG. 3 is an arrangement view of a central conductor of the present invention.
  • FIGS. 4A and 4B are arrangement views of symmetri- States Patent 0 ice cal central conductors according to the present invention.
  • FIGS. 5A and 5B are arrangement views of condensers.
  • FIGS. 6A and 6B show other embodiments of the present invention.
  • FIG. 7 is a sectioned view of a circulator of the present invention.
  • the meshed parts of the central conductor require the overlapping of the element conductors and, therefore cannot be formed in the same plane.
  • the three circuits (conductors) insulated from one another can be formed in a plane surface, while intersecting with each other. That is to say, by arranging only the parts of the conductor legs intersecting of overlapping the other conductor legs on the second (back) surface of the insulating plate, susbtantial part of all the conductors may be arranged on the first (front) surface of the insulating plate.
  • FIG. 3 An example of the thus formed central conductor is shown in FIG. 3.
  • A, B and C respective elements having substantially U-shaped legs and forming a circulator, are insulated from one another and are radially arranged at an equal angle with one another.
  • the part shown with the broken lines represents the element or parts thereof arranged on the second surface (back surface). Further, the parts shown with the round mark are points electrically connecting both front and back surfaces.
  • the element A is arranged on the first surface (front surface) of an insulating plate (not illustrated) and the element B is arranged on the second surface (back surface).
  • the parts shown with the broken lines in the element C, where intersecting the element A, are arranged on the second surface (back surface).
  • the parts arranged on the first and second surfaces, respectively, in the element C are connected with a conductive material, by way of so-called skip-connection across through holes made in the insulating plate.
  • the three element conductors are not uniformly distributed on the front and back surfaces and, therefore, are not electrically prefectly symmetrical.
  • the conductor is used as an isolator with a matched load connected to one terminal, it will be sufficient.
  • a swmmetrical three-terminal circulator such pattern as is shown in FIGS. 4A and 4B may be preferable.
  • A, B and C are respective elements forming a circulator.
  • the solid lines show a pattern on the front surface and the broken lines show a pattern on the back surface.
  • the round mark represents a point electrically connecting the front and back surfaces.
  • the elements B and C are formed similar to the element A.
  • each of the legs in which the elements A and B, B and C and C and A are respectively overlapped are skip-connected through the holes, so that the legs may be electrically insulated from legs of the other element.
  • FIG. 4A all the overlapped parts are skip-connected through the-holes and the terminals of the three conductors arein the same plane, but there are too many points connecting the front and 3 back surfaces. It is advantageous to reduce such connecting points so as to make the manufacture easier, and thus an example in which such connecting points are reduced is shown in FIG. 4B. In such case, the front and back connecting points in the skip-connecting parts will be half as many as in the case of FIG. 4A.
  • the free ends of the legs of the respective elements are arranged as divided on the first and second surfaces.
  • 8 is an element
  • 9 is a terminal
  • 10 is one of electrodes forming a condenser, the other electrode (not illustrated) being provided on the surface opposite it.
  • 11 is a connecting line connecting the element 8 and electrode 10.
  • 12 is a fixed part of a shielding case (not illustrated).
  • the element is grounded together with the shielding case.
  • Parts in broken line represent parts of elements formed on the back surface.
  • the element in this case is not U-shaped, but is formed of legs closed at the ends corresponding to the free ends of above mentioned U-shaped elements, so as to be substantially rectangular.
  • FIGS. 6A and 6B correspond, respectively, to FIGS. 5A and 5B.
  • FIG. 7 is a sectioned view of a circulator of the present invention.
  • 1 is a magnetic material for high frequencies formed in a disk shape, which is arranged on upper and lower surfaces of a double surface printed board 2 and enclosed in a shielding case 3.
  • 5 is a permanent magnet of a disk form, which is arranged so as to oppose said magnetic material 1 for high frequencies, and mounted on inside surface of a housing 7 consisting of a magnetic material.
  • 6 is a connector, three of which are provided on the side wall of said housing 13 is a grounding plate, which is utilized for holding said double surface printed board 2 while acting as a grounding means. While there are provided three connectors 6 in this particular circulator, only two of them are illustrated in the FIG. 7, which shows a sectional view taken along said two connectors.
  • a three-terminal circulator inner component is provided for use in a circulator having a magnetic material set for high frequencies and a shielding case, which inner component can be made much more simply than by any conventional method, and thus a circulator having uni form characteristics can be provided.
  • An electronic circulator comprising a ground plate, ferromagnetic disc means having a selectively variable permeability, magnetic means creating a DC magnetic field transverse to said disc means, an insulating plate disposed adjacent and parallel to said disc means, and at least three conducting elements radially arranged to cross said insulating plate and intersect at equal angles to one another with their common intersection point aligned axially with said disc means, each of said conducting elements having a pair of legs with portions thereof selectively formed on opposite sides of said insulating plate with connections through said plate to electrically connect said portions on opposite sides, thereby allowing the legs of said conducting element to intersect the legs of the other elements on opposite sides of said plate to maintain electrical isolation therebetween.
  • each conducting element is formed on a single side of said insulating plate and wherein only selected portions of said member intersecting other members are formed on the other side of said plate.
  • an electronic junction circulator of the type comprising a ground plate and a ferromagnetic disc adapted to be biased by a transverse DC magnetic field
  • the improvement comprising an insulating plate, and at least three conducting elements radially arranged to cross said insulating plate and intersect at equal angles to one another, each of said conducting elements having a pair of legs with portions thereof selectively formed on op posite sides of said insulating plate with connections through said plate to electrically connect said portions on opposite sides, thereby allowing the legs of said conducting elements to intersect the legs of the other elements on opposite sides of said plate to maintain electrical isolation therebetween.

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US726986A 1967-05-11 1968-05-06 Junction circulator wherein each center conductor leg appears on both sides of the insulation board Expired - Lifetime US3522555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP42029461A JPS4833344B1 (enrdf_load_stackoverflow) 1967-05-11 1967-05-11

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US3522555A true US3522555A (en) 1970-08-04

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Application Number Title Priority Date Filing Date
US726986A Expired - Lifetime US3522555A (en) 1967-05-11 1968-05-06 Junction circulator wherein each center conductor leg appears on both sides of the insulation board

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JP (1) JPS4833344B1 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617945A (en) * 1968-11-28 1971-11-02 Mitsubishi Electric Corp Strip line circulator wherein the branch arms have portions extending in a nonradial direction
DE2249180A1 (de) * 1972-10-06 1974-04-11 Philips Patentverwaltung Zirkulator fuer den frequenzbereich von 10 bis 1000 mhz
US3836874A (en) * 1973-06-25 1974-09-17 Hitachi Ltd Lumped element circulator
US3838360A (en) * 1972-10-06 1974-09-24 Philips Corp Junction circulator having curved conductors on opposite sides of printed circuit board
US3890582A (en) * 1973-06-15 1975-06-17 Addington Lab Inc Floating-ground microwave ferrite isolators
US3895320A (en) * 1974-03-06 1975-07-15 Nippon Electric Co Broad-band lumped-element circulator
USRE28998E (en) * 1973-03-27 1976-10-05 Nippon Electric Company, Ltd. Broad-band lumped-element circulator
US4904965A (en) * 1988-12-27 1990-02-27 Raytheon Company Miniature circulator for monolithic microwave integrated circuits
US4920323A (en) * 1988-12-27 1990-04-24 Raytheon Company Miniature circulators for monolithic microwave integrated circuits
US5159294A (en) * 1990-03-01 1992-10-27 Murata Manufacturing Co., Ltd. Non-reciprocal circuit element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3335374A (en) * 1964-05-14 1967-08-08 Japan Broadcasting Corp Lumped element y circulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511640B2 (enrdf_load_stackoverflow) * 1973-05-23 1976-01-19

Patent Citations (2)

* 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
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

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617945A (en) * 1968-11-28 1971-11-02 Mitsubishi Electric Corp Strip line circulator wherein the branch arms have portions extending in a nonradial direction
DE2249180A1 (de) * 1972-10-06 1974-04-11 Philips Patentverwaltung Zirkulator fuer den frequenzbereich von 10 bis 1000 mhz
US3838360A (en) * 1972-10-06 1974-09-24 Philips Corp Junction circulator having curved conductors on opposite sides of printed circuit board
USRE28998E (en) * 1973-03-27 1976-10-05 Nippon Electric Company, Ltd. Broad-band lumped-element circulator
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
US3895320A (en) * 1974-03-06 1975-07-15 Nippon Electric Co Broad-band lumped-element circulator
US4904965A (en) * 1988-12-27 1990-02-27 Raytheon Company Miniature circulator for monolithic microwave integrated circuits
US4920323A (en) * 1988-12-27 1990-04-24 Raytheon Company Miniature circulators for monolithic microwave integrated circuits
US5159294A (en) * 1990-03-01 1992-10-27 Murata Manufacturing Co., Ltd. Non-reciprocal circuit element

Also Published As

Publication number Publication date
JPS4833344B1 (enrdf_load_stackoverflow) 1973-10-13

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