EP0031768B1 - Dispositif hyperfréquence non réciproque opérant à niveau élevé - Google Patents

Dispositif hyperfréquence non réciproque opérant à niveau élevé Download PDF

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Publication number
EP0031768B1
EP0031768B1 EP80401823A EP80401823A EP0031768B1 EP 0031768 B1 EP0031768 B1 EP 0031768B1 EP 80401823 A EP80401823 A EP 80401823A EP 80401823 A EP80401823 A EP 80401823A EP 0031768 B1 EP0031768 B1 EP 0031768B1
Authority
EP
European Patent Office
Prior art keywords
plates
gyromagnetic
waveguide
guide
dielectric
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
EP80401823A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0031768A2 (fr
EP0031768A3 (en
Inventor
Gérard Forterre
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0031768A2 publication Critical patent/EP0031768A2/fr
Publication of EP0031768A3 publication Critical patent/EP0031768A3/fr
Application granted granted Critical
Publication of EP0031768B1 publication Critical patent/EP0031768B1/fr
Expired legal-status Critical Current

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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
    • H01P1/397—Circulators using non- reciprocal phase shifters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/19—Phase-shifters using a ferromagnetic device

Definitions

  • an insulator consists of two phase shift cells having a small guide wall in common, each phase shifter comprising two strips of gyromagnetic material arranged symmetrically on each of the large faces, ie four bands per guide.
  • a magnetic structure external to the guides establishes in the guides magnetizing fields parallel to the small faces of the guides and in opposite directions, between the two pairs of strips of gyromagnetic material facing each other in each guide.
  • a cooling circuit by circulation of water is provided for removing the colors transmitted by the strips to the guide through a flexible adhesive deposited in a thin layer on the guide.
  • the measures reported relate to a light structure with two ferrite bands per guide.
  • the devices studied have an insertion loss of 0.25 dB at 50 kilowatt average at 2450 MHz.
  • the structure with four ferrite bands per guide is called "structure of the type considered”.
  • each phase shift cell is of the type considered with four ferrite bands per guide, the derferrite bands being arranged symmetrically two by two on each of the large walls of the guide.
  • a magnetic circuit external to the guide establishes opposite magnetizing fields parallel to the small walls of the guide in a volume including the four bands of ferrite.
  • the present invention aims to improve the structure of a set of two phase shift cells of the type considered with four ferrite bands per guide so as to obtain high and constant performance for a high level of operating power.
  • the invention relates to a non-reciprocal microwave phase shifter operating at a high level of average power, comprising two waveguides of rectangular section placed side by side along one of the small walls, four longitudinal pieces of material gyromagnetic mounted in each guide and arranged symmetrically two by two on each of the large walls of the guide, and a magnetic circuit, establishing magnetizing fields of opposite directions parallel to the small walls of each guide in a volume including the four pieces of gyromagnetic material, characterized in that each of the pieces of gyromagnetic material consists of a first assembly of parallelepipedal gyromagnetic plates of the same thickness, of the same width, and whose longitudinal axes are combined, in that two pieces of gyromagnetic material located on the same wall of each guide are arranged on either side of a piece of dielectric material cen trée on the median plane of the guide, in that the dielectric part consists of a second assembly of parallelepiped dielectric plates of the same width, and of
  • the phase shifter according to the invention has a standing wave rate which remains less than 1.1 on a suitable load and 1.35 on a short circuit up to 50 kilowatt maintained at 2450 MHz; and above all, the insertion loss remains less than 0.16 dB, while allowing the use of guide sections obtained by aluminum casting, therefore of lower cost price than that of the machined parts and of piods very clearly lower (almost 40% reduction).
  • FIG 1 is a perspective view of a phase shifter according to the invention, partially broken away on the left half, so as to allow a view of the interior of one of the guides.
  • the phase shifter is made up of two waveguides of rectangular section placed side by side along one of the small walls. These guides are delimited by the two E-shaped parts (1 and 2) arranged one on the other. The left half of part 2 is torn off. The two large walls of the guides are covered with a set of plates visible on the left side of the view. These plates are either in gyromagnetic material such as 3, or in dielectric material such as 4. As it appears on the section ( Figure 2) almost the entire surface is covered.
  • the plates 3 and 4 are rectangular and of width defined by the distribution of the microwave magnetic field in the guide.
  • the gyromagnetic material being centered on the plane of circular polarization, it occupies the zone where there is at least 10% of the microwave magnetic field with circular polarization. In other variants, this area can be reduced, the ferrite extending on either side of the plane with circular polarization over an area where at least 20%, for example, of the field has circular polarization.
  • the width of the plates 4 is chosen to occupy the space between the two strips formed by the plates 3. Their lengths, which may be different as in the illustrated embodiment, or equal, are fixed by mechanical conditions related to their coefficients of expansion .
  • the materials are chosen so as to have the same permittivity as is well known.
  • the plates 3 and 4 are fixed to the wall of the guide by a seal of insulating silicone glue of minimum thickness (a few hundredths of a millimeter). This glue fills the joints between the parts and thus constitutes an expansion joint between the parts, which considerably reduces the risks of mechanical rupture.
  • the set of plates 3 and 4 thus constitutes a checkerboard which almost entirely covers the large walls of the two guides. Cooling fluid circulation conduits are provided in the thickness of the profiles 1 and 2 and are supplied by the fluid inlet and outlet 5 and 6.
  • pole pieces such as 7 consisting of strips of soft iron the length of phase shifter and of the same width as the plates 3. They are intended to standardize the magnetic field created by the magnets 8.
  • a yoke 9 consisting of 'A soft iron strip the length of the phase shifter closes the magnetic field between the two series of magnets 8 located on the same side of a guide.
  • a protective plate 10 made of aluminum for example, and spacers 11 of the same metal constitute a housing.
  • the connection flanges 12 (FIG. 3) consist of openings of parts 1 and 2 at their ends.
  • the section in FIG. 2 makes it easier to see relative arrangements of the elements already mentioned.
  • the cooling fluid circulation conduits are shown at 15.
  • the propagation volumes delimited by parts 1 and 2 bear the reference numbers 16 and 17.
  • the checkerboards glued on the upper and lower walls are slightly offset parallel to the axis of the guides to improve adaptation.
  • wafers of gyromagnetic material of the TT 2113 type supplied by the TRANS-TECH company were used, constituting bands of 25 ⁇ 388 mm 2 .
  • the dielectric used is of the D 16 type supplied by the TRANS-TECH Company.
  • the performances of this embodiment mounted in a circulator with a reminder and a 3 dB coupler are as follows:

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP80401823A 1979-12-28 1980-12-18 Dispositif hyperfréquence non réciproque opérant à niveau élevé Expired EP0031768B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7931975A FR2472848A1 (fr) 1979-12-28 1979-12-28 Dispositif hyperfrequence non reciproque operant a niveau eleve
FR7931975 1979-12-28

Publications (3)

Publication Number Publication Date
EP0031768A2 EP0031768A2 (fr) 1981-07-08
EP0031768A3 EP0031768A3 (en) 1981-07-22
EP0031768B1 true EP0031768B1 (fr) 1984-06-27

Family

ID=9233280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401823A Expired EP0031768B1 (fr) 1979-12-28 1980-12-18 Dispositif hyperfréquence non réciproque opérant à niveau élevé

Country Status (4)

Country Link
US (1) US4374367A (Direct)
EP (1) EP0031768B1 (Direct)
DE (1) DE3068388D1 (Direct)
FR (1) FR2472848A1 (Direct)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181220B1 (en) * 1999-04-19 2001-01-30 Lucent Technologies, Inc. Method for reducing electrical discharge in a microwave circuit, and a microwave circuit treated by the method
US6407646B1 (en) * 2000-03-23 2002-06-18 Ray M. Johnson Distributed three port stacked waveguide circulator
CN100348545C (zh) * 2005-11-25 2007-11-14 长沙隆泰科技有限公司 一种微波烧结旋磁铁氧体材料的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075159A (en) * 1957-07-26 1963-01-22 Sylvania Electric Prod High power ferrite isolator having ferrite materials of differing curie temperature
NL255799A (Direct) * 1960-09-10
US4286135A (en) * 1979-10-09 1981-08-25 Raytheon Company Compact microwave isolator

Also Published As

Publication number Publication date
EP0031768A2 (fr) 1981-07-08
EP0031768A3 (en) 1981-07-22
FR2472848A1 (fr) 1981-07-03
US4374367A (en) 1983-02-15
DE3068388D1 (en) 1984-08-02
FR2472848B1 (Direct) 1983-09-23

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