WO2021024310A1 - Coupleur de polarisation - Google Patents

Coupleur de polarisation Download PDF

Info

Publication number
WO2021024310A1
WO2021024310A1 PCT/JP2019/030527 JP2019030527W WO2021024310A1 WO 2021024310 A1 WO2021024310 A1 WO 2021024310A1 JP 2019030527 W JP2019030527 W JP 2019030527W WO 2021024310 A1 WO2021024310 A1 WO 2021024310A1
Authority
WO
WIPO (PCT)
Prior art keywords
waveguide
demultiplexer
rectangular
input
rectangular waveguide
Prior art date
Application number
PCT/JP2019/030527
Other languages
English (en)
Japanese (ja)
Inventor
秀憲 湯川
優 牛嶋
素実 渡辺
高橋　徹
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2021538534A priority Critical patent/JP7012910B2/ja
Priority to PCT/JP2019/030527 priority patent/WO2021024310A1/fr
Publication of WO2021024310A1 publication Critical patent/WO2021024310A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer

Definitions

  • the present invention mainly relates to a demultiplexer that separates a plurality of polarized waves in frequency bands such as VHF (Very High Frequency) band, UHF (Ultra High Frequency) band, microwave band and millimeter wave band.
  • VHF Very High Frequency
  • UHF Ultra High Frequency
  • Non-Patent Document 1 In wireless communication systems such as satellite communication systems, a plurality of polarizations orthogonal to each other are used for the purpose of effective use of frequencies, and an ortho-mode-transducer for separating the plurality of polarizations. , OMT) is required.
  • OMT ortho-mode-transducer
  • Non-Patent Document 1 a circular waveguide having a short-circuit end at one end and an input / output terminal at the other end and a circular waveguide extending in the vicinity of the short-circuit end so as to branch in opposite directions from each other.
  • a T-junction Ortho-Mode-Transducer equipped with two rectangular waveguides is disclosed.
  • the wide wall surface of the first rectangular waveguide among the two rectangular waveguides is arranged so as to be parallel to the tube axis direction of the circular waveguide, and the two rectangular waveguides are arranged.
  • the wide wall surface of the second rectangular waveguide is arranged so as to be orthogonal to the tube axis direction of the circular waveguide.
  • Such a T-branched demultiplexer separates two linearly polarized waves that are orthogonal to each other input from the input / output terminals of a circular waveguide, and one of the two linearly polarized waves is first rectangularly conducted. It is output from the branch terminal of the wave tube, and the other of the two linearly polarized waves is output from the branch terminal of the second rectangular waveguide.
  • the conventional T-branch type demultiplexer disclosed in Non-Patent Document 1 the mutual influence between the branch terminals of the first and second rectangular waveguides is reduced to obtain good demultiplexing characteristics.
  • the wide wall surface of the first rectangular waveguide is arranged so as to be parallel to the tube axis direction of the circular waveguide, and the wide wall surface of the second rectangular waveguide is of the circular waveguide. Arranged so as to be orthogonal to the direction of the waveguide.
  • the conventional T-branch type deflector has a geometrically asymmetrical configuration with respect to the tube axis of the circular waveguide, and therefore, from the branch terminal of the first and second rectangular waveguides. The frequency characteristics of the output polarization signals will be different. There is a problem that this hinders the improvement of the demultiplexing characteristic.
  • an object of the present invention is to provide a demultiplexer capable of making the frequency characteristics of the separated polarized signals the same and realizing excellent demultiplexing characteristics.
  • the deflector according to one aspect of the present invention has a short-circuit end provided at one end in the axial direction of its own tube and an input / output terminal provided at the other end in the axial direction of its own tube.
  • a common waveguide having a waveguide space for propagating a first polarization component and a second polarization component that are orthogonal to each other between the end and the input / output terminal, a pair of wide walls facing each other, and facing each other.
  • It has a wall surface and a pair of narrow wall surfaces facing each other, and includes a second rectangular waveguide connected to the side wall of the common waveguide and extending in a second direction orthogonal to the tube axis direction.
  • the short-circuit end has a base end portion forming a surface orthogonal to the tube axis direction, and the pair of wide wall surfaces of the first rectangular waveguide is on a surface perpendicular to the first direction.
  • the pair of wide walls of the second rectangular waveguide, inclined at an angle of 45 degrees with respect to the proximal end, are 45 relative to the proximal end in a plane perpendicular to the second direction. It is characterized by being tilted at an angle of degrees.
  • the demultiplexer according to one aspect of the present invention has a configuration capable of making the frequency characteristics of the polarized signals output from the input / output terminals of the first and second rectangular waveguides the same. Therefore, excellent decentralized wave characteristics can be realized.
  • FIG. 4A is a right side view of the demultiplexer shown in FIG. 1
  • FIG. 4B is a left side view of the demultiplexer shown in FIG.
  • explanatory drawing which conceptually shows the electric field of the linearly polarized wave signal input to the rectangular waveguide of Embodiment 1.
  • It is explanatory drawing which shows the polarization signal component propagating in the inside of the demultiplexer of Embodiment 1.
  • FIG. 15 is a right side view of the demultiplexer shown in FIG. It is a rear view of the demultiplexer shown in FIG. It is a bottom view of the demultiplexer shown in FIG. It is explanatory drawing which conceptually shows two linearly polarized wave signals output from the common waveguide of Embodiment 1.
  • FIG. 21A is a right side view of the demultiplexer shown in FIG. 20, and FIG. 21B is a left side view of the demultiplexer shown in FIG. 20.
  • 22A and 22B are diagrams schematically showing the configuration of the short-circuit end of the third embodiment.
  • 23A and 23B are diagrams schematically showing the configuration of the short-circuit end in the first modification of the third embodiment.
  • 24A and 24B are diagrams schematically showing the configuration of the short-circuit end in the second modification of the third embodiment.
  • 25A and 25B are diagrams schematically showing the configuration of the short-circuit end in the third modification of the third embodiment.
  • FIG. 29A and 29B are perspective views showing a schematic configuration of a demultiplexer according to a second modification of the fourth embodiment. It is a graph which shows the calculation example of the reflection characteristic about the demultiplexer of the 2nd modification of Embodiment 4. It is a graph which shows the calculation example of the isolation characteristic between polarizations about the demultiplexer of the 2nd modification of Embodiment 4.
  • FIG. 1 is a perspective view showing a schematic configuration of a demultiplexer 1 according to a first embodiment of the present invention.
  • 2 is a front view of the demultiplexer shown in FIG. 1
  • FIG. 3 is a bottom view of the demultiplexer shown in FIG. 1
  • FIG. 4A is a bias shown in FIG. It is a right side view of the demultiplexer
  • FIG. 4B is a left side view of the demultiplexer shown in FIG.
  • the deflector 1 of the present embodiment is configured to include a common waveguide 10 and rectangular waveguides 20 and 30 branching from the side wall of the common waveguide 10.
  • the common waveguide 10 is composed of a circular waveguide having a tube axis Ax parallel to the Z-axis direction, and has a short-circuit end 10q provided at one end in the tube axis direction and an open end provided at the other end in the tube axis direction.
  • the common waveguide 10 of the present embodiment can mainly propagate the TE 11 mode.
  • the short-circuit end 10q has an annular base end portion 10qb forming a plane orthogonal to the tube axis Ax, and a protrusion 10qc protruding from the base end portion 10qb toward the input / output terminal 10p.
  • the protrusion 10qc has a truncated cone shape geometrically symmetrical with respect to the tube axis Ax, and the position of the tip portion of the protrusion 10qc coincides with the tube axis Ax.
  • the protrusion 10qc of the present embodiment has a cross section that continuously changes from the base end portion 10qb toward the input / output terminal 10p, but is not limited thereto.
  • the shape of the protrusion 10qc may be changed so as to have a cross section that gradually changes from the base end portion 10qb toward the input / output terminal 10p.
  • the rectangular waveguide (first rectangular waveguide) 20 is composed of a pair of wide wall surfaces facing each other and a pair of narrow walls facing each other, as shown in FIGS. 1 to 3 and 4B. It has an inner wall surface.
  • the wide wall surface means an inner wall surface forming the long side of the rectangular cross section of the rectangular waveguide 20 as shown in FIG. 4B, and the narrow wall surface forms the short side of the rectangular cross section. It means the inner wall surface.
  • the rectangular waveguide 20 is arranged so as to extend from the side wall of the common waveguide 10 in the negative direction of the Y axis (first direction) in the vicinity of the short-circuit end 10q of the common waveguide 10.
  • the waveguide space 20h inside the rectangular waveguide 20 communicates with the waveguide space 10h of the common waveguide 10 via a coupling hole.
  • An input / output terminal (branch terminal) 20p is provided at one end of the rectangular waveguide 20.
  • the rectangular waveguide (second rectangular waveguide) 30 has the same waveguide structure as the rectangular waveguide 20. As shown in FIGS. 1 to 3 and 4A, the rectangular waveguide 30 has an inner wall surface composed of a pair of wide wall surfaces facing each other and a pair of narrow wall surfaces facing each other.
  • the wide wall surface means an inner wall surface forming the long side of the rectangular cross section of the rectangular waveguide 30 as shown in FIG. 4A, and the narrow wall surface forms the short side of the rectangular cross section. It means the inner wall surface.
  • the rectangular waveguide 30 is arranged so as to extend in the Y-axis positive direction (second direction) from the side wall of the common waveguide 10 in the vicinity of the short-circuit end 10q of the common waveguide 10.
  • the waveguide space 30h inside the rectangular waveguide 30 communicates with the waveguide space 10h of the common waveguide 10 via a coupling hole.
  • An input / output terminal (branch terminal) 30p is provided at one end of the rectangular waveguide 30.
  • the protrusion 10qc at the short-circuit end 10q faces the coupling hole formed between the rectangular waveguide 20 and the common waveguide 10, and is a rectangular waveguide. It also faces the coupling hole formed between 30 and the common waveguide 10.
  • Such a protrusion 10qc can serve a function of blocking signal propagation between the rectangular waveguides 20 and 30.
  • the rectangular waveguides 20 and 30 described above extend in opposite directions (Y-axis negative direction and Y-axis positive direction) on a plane perpendicular to the tube axis direction of the common waveguide 10, respectively, and the tube axis Ax. They are arranged so that they are geometrically symmetrical with respect to each other.
  • Such a demultiplexer 1 may be manufactured by processing and welding a metal alloy material.
  • the demultiplexer 1 integrally forms the common waveguide 10 and the rectangular waveguides 20 and 30 by laminating and molding a metal powder such as an aluminum alloy (AlSi 10 Mg) using a metal 3D printer. It may be produced by the above.
  • a laser sintering method Selective Laser Sintering, SLS
  • DMLS direct metal laser sintering method
  • SLM Selective Laser Melting
  • a melting method (Electron Beam Melting, EBM) or a laser direct laminating method (Laser Engineering Net Shipping, LENS) can be used. It should be noted that the second to fourth embodiments described later and modified examples thereof can also be produced by the same method as that of the demultiplexer 1.
  • the conventional T-branch waveguide disclosed in Non-Patent Document 1 has two rectangular waveguides extending from the side wall of the circular waveguide so as to branch in opposite directions. Both of these two rectangular waveguides have a wall surface perpendicular to the tube axis direction of the circular waveguide. Therefore, when the wall surfaces of these rectangular waveguides are laminated and modeled using a metal 3D printer, the axial direction of the circular waveguide must be tilted by a predetermined angle (for example, 45 degrees) from the stacking direction.
  • a predetermined angle for example, 45 degrees
  • the wide wall surfaces of the rectangular waveguides 20 and 30 are oriented with respect to the tube axis direction of the common waveguide 10. Since it is tilted at 45 degrees, the metal 3D printer can laminate and model the metal alloy material along the tube axis direction of the common waveguide 10. As a result, it is possible to improve the modeling accuracy of the common waveguide 10 and reduce the cost of the demultiplexer 1.
  • FIG. 5 is a diagram conceptually showing the electric field E1 of the linearly polarized wave signal input to the input / output terminal 30p of the rectangular waveguide 30.
  • This electric field E1 can be considered as the vector sum of two electric field components E1x and E1z that are orthogonal to each other.
  • the electric field component E1x is converted into the electric field component E2x when propagating from the input / output terminal 30p of the rectangular waveguide 30 to the input / output terminal 10p of the common waveguide 10 as shown in FIG. Since the protrusion 10qc blocks the propagation of the electric field component E1x between the rectangular waveguides 20 and 30, the amount of the electric field component leaking from the rectangular waveguide 30 to the rectangular waveguide 20 can be made very small. it can.
  • the electric field component E1z is converted into the electric field component E2y when propagating from the input / output terminal 30p of the rectangular waveguide 30 to the input / output terminal 10p of the common waveguide 10 as shown in FIG. Since the protrusion 10qc blocks the propagation of the electric field component E1z between the rectangular waveguides 20 and 30, the amount of the electric field component leaking from the rectangular waveguide 30 to the rectangular waveguide 20 can be made very small. it can.
  • the signal output from the input / output terminal 10p of the common waveguide 10 is a polarization signal having an electric field E2 which is a vector sum of the electric field components E2x and E2y.
  • FIG. 9 is a diagram conceptually showing the electric field E3 of the linearly polarized wave signal input to the input / output terminal 20p of the rectangular waveguide 20.
  • This electric field E3 can be considered as the vector sum of two electric field components E3x and E3z that are orthogonal to each other.
  • the electric field component E3x is converted into the electric field component E4x when propagating from the input / output terminal 20p of the rectangular waveguide 20 to the input / output terminal 10p of the common waveguide 10 as shown in FIG. Since the protrusion 10qc blocks the propagation of the electric field component E4x between the rectangular waveguides 20 and 30, the amount of the electric field component leaking from the rectangular waveguide 20 to the rectangular waveguide 30 can be made very small. it can.
  • the electric field component E3z is converted into the electric field component E4y when propagating from the input / output terminal 20p of the rectangular waveguide 20 to the input / output terminal 10p of the common waveguide 10 as shown in FIG. Since the protrusion 10qc blocks the propagation of the electric field component E4y between the rectangular waveguides 20 and 30, the amount of the electric field component leaking from the rectangular waveguide 20 to the rectangular waveguide 30 can be made very small. it can.
  • the signal output from the input / output terminal 10p of the common waveguide 10 is a polarization signal having an electric field E4 which is a vector sum of the electric field components E4x and E4y.
  • the input / output terminals 10p of the common waveguide 10 have the electric field E2 shown in FIG. 8 as shown in FIG.
  • the polarization signal and the polarization signal having the electric field E4 shown in FIG. 12 can be output.
  • These linearly polarized signals are orthogonal to each other.
  • the polarization demultiplexer 1 separates these polarization signals and performs the polarization.
  • One of the signals can be output from the input / output terminal 20p of the rectangular waveguide 20, and the other of the polarized signals can be output from the input / output terminal 30p of the rectangular waveguide 30.
  • the demultiplexer 1 of the first embodiment is input / output of the rectangular waveguides 20 and 30. It has a configuration in which the frequency characteristics of the polarization signals output from the terminals 20p and 30p can be made the same. Therefore, excellent demultiplexing characteristics (for example, isolation characteristics between input / output terminals, isolation characteristics between polarizations, and reflection characteristics) can be realized.
  • the conventional T-branched waveguide disclosed in Non-Patent Document 1 has two rectangular waveguides branched from the side wall of the circular waveguide, but has an asymmetric structure. Therefore, if the frequency characteristics of the polarization signal output from one of the two rectangular waveguides are optimized, the frequency characteristics of the polarization signal output from the other rectangular waveguide can be optimized. Will deteriorate. Further, if the matching between one rectangular waveguide and the circular waveguide is improved, there is a problem that the matching between the other rectangular waveguide and the circular waveguide is deviated. On the other hand, in the case of the present embodiment, as shown in FIGS.
  • the rectangular waveguides 20 and 30 are on a plane perpendicular to the tube axis direction of the common waveguide 10. Since they extend in opposite directions and are arranged so as to be geometrically symmetrical with respect to the tube axis Ax, the deflector 1 is geometrically arranged with respect to the XZ plane including the tube axis direction. It has a symmetrical structure. Therefore, as compared with the conventional T-branch type demultiplexer, the matching between the rectangular waveguides 20 and 30 and the common waveguide 10 can be easily adjusted.
  • FIG. 14 is a block diagram showing a schematic configuration of a demultiplexer 1A, which is a modification of the first embodiment.
  • the demultiplexer 1A has a configuration in which the 90-degree hybrid coupler 9 is connected to the input / output terminals 20p and 30p of the demultiplexer 1 of the first embodiment.
  • the 90-degree hybrid coupler 9 has four input / output terminals 9a, 9b, 9c, and 9d, and the input / output terminals 9a and 9b are coupled to the input / output terminals 20p and 30p of the demultiplexer 1, respectively.
  • the 90-degree hybrid coupler 9 transmits a polarization signal having a phase difference of 90 degrees to the input / output terminals 9a, Output from 9b to input / output terminals 30p and 20p.
  • a polarization signal is input to the input / output terminal 9c
  • the demultiplexer 1 can output right-handed circularly polarized light from the input / output terminal 10p, and the polarization signal is input to the input / output terminal 9d. In this case, the demultiplexer 1 can output left-handed circularly polarized light from the input / output terminal 10p.
  • the demultiplexer 1A can operate as a circularly polarized wave separator.
  • the input / output terminal 9c of the 90-degree hybrid coupler 9 can be used as a terminal for signal transmission
  • the input / output terminal 9d of the 90-degree hybrid coupler 9 can be used as a terminal for signal reception.
  • the demultiplexer 1A can be configured to have a geometrically symmetrical structure as a whole. Therefore, the demultiplexer 1A can have excellent demultiplexing characteristics.
  • FIG. 15 is a perspective view showing a schematic configuration of a demultiplexer 2 according to a second embodiment of the present invention.
  • 16 is a right side view of the demultiplexer 2 shown in FIG. 15
  • FIG. 17 is a rear view of the demultiplexer 2 shown in FIG. 15,
  • FIG. 18 is a rear view of FIG. It is a bottom view of the demultiplexer 2 shown.
  • the demultiplexer 2 of the second embodiment branches from the common waveguide 10 and the side wall of the common waveguide 10, similarly to the demultiplexer 1 of the first embodiment. It is configured to include rectangular waveguides 20 and 30.
  • the configuration of the demultiplexer 2 is the same as the configuration of the demultiplexer 1 of the first embodiment except for the connection form between the common waveguide 10 and the rectangular waveguide 20.
  • the rectangular waveguide 20 extends in the negative X-axis direction (first direction) from the side wall of the common waveguide 10 in the vicinity of the short-circuit end 10q of the common waveguide 10.
  • the rectangular waveguide 30 is arranged so as to extend in the Y-axis positive direction (second direction) from the side wall of the common waveguide 10 in the vicinity of the short-circuit end 10q.
  • the waveguide space 20h inside the rectangular waveguide 20 communicates with the waveguide space 10h of the common waveguide 10 via a coupling hole.
  • the protruding portion 10qc of the short-circuit end 10q faces the coupling hole formed between the rectangular waveguide 20 and the common waveguide 10, and is opposed to the rectangular waveguide 30. It also faces the coupling hole formed between the common waveguide 10.
  • Such a protrusion 10qc can serve a function of blocking signal propagation between the rectangular waveguides 20 and 30.
  • the rectangular waveguides 20 and 30 extend in directions orthogonal to each other (X-axis negative direction and Y-axis positive direction) on the plane orthogonal to the tube axis direction of the common waveguide 10. doing.
  • the cross-sectional shape of the rectangular waveguide 20 shown in FIG. 16 matches the cross-sectional shape of the rectangular waveguide 30 shown in FIG.
  • the input / output terminal 10p of the common waveguide 10 can output a polarization signal having an electric field E2 and a polarization signal having an electric field E5. These polarized signals are orthogonal to each other.
  • the polarization demultiplexer 2 separates these polarization signals and performs the polarization.
  • One of the signals can be output from the input / output terminal 20p of the rectangular waveguide 20, and the other of the polarized signals can be output from the input / output terminal 30p of the rectangular waveguide 30.
  • the demultiplexer 2 of the second embodiment is also output from the input / output terminals 20p and 30p of the rectangular waveguides 20 and 30, respectively. It has a configuration in which the frequency characteristics of the polarized signals can be made the same. Therefore, excellent demultiplexing characteristics can be realized. Further, as compared with the first embodiment, since the rectangular waveguides 20 and 30 are arranged at positions closer to each other, the size of the demultiplexer 2 can be reduced.
  • FIG. 20 is a perspective view showing a schematic configuration of a demultiplexer 3 according to a third embodiment of the present invention.
  • 21A is a right side view of the demultiplexer 3 shown in FIG. 20, and
  • FIG. 21B is a left side view of the demultiplexer 3 shown in FIG. 20.
  • the deflector 3 of the third embodiment includes a common waveguide 11 and rectangular waveguides 20 and 30 branching from the side wall of the common waveguide 11. There is.
  • the configuration of the demultiplexer 3 is the same as that of the demultiplexer 1 of the first embodiment, except that the common waveguide 11 of FIG. 20 is provided instead of the common waveguide 10 of the first embodiment. It is the same.
  • the common waveguide 11 is composed of a circular waveguide having a tube axis Ax parallel to the Z-axis direction, and has a short-circuit end 11q provided at one end in the tube axis direction and an open end provided at the other end in the tube axis direction.
  • the common waveguide 11 of the present embodiment can mainly propagate the TE 11 mode.
  • the short-circuit end 11q has an annular base end 11qb forming a plane orthogonal to the tube axis Ax, and a protrusion 11qc protruding from the base end 11qb toward the input / output terminal 11p.
  • the protrusion 11qc has an elliptical frustum shape eccentric from the tube axis Ax. As shown in FIGS. 21A and 21B, the protrusion 11qc faces the coupling hole formed between the rectangular waveguide 20 and the common waveguide 11, and the rectangular waveguide 30 and the common waveguide 11 face each other. It also faces the coupling hole formed between and.
  • the protrusion 11qc has an elliptical columnar tip portion 11qt on its own body portion, and the tip portion 11qt is offset (eccentric) from the tube axis Ax of the common waveguide 11. ) Is placed at the position. Since the effect of blocking signal propagation between the rectangular waveguides 20 and 30 is improved by such a tip portion 11qt, it is possible to improve the partial wave separation characteristic.
  • a columnar tip portion may be provided instead of the elliptical columnar tip portion 11qt.
  • the protrusion 11qc of the present embodiment has an inclined portion that changes linearly from the base end portion 11qb toward the input / output terminal 11p, but is limited to this. is not it.
  • the shape of the protrusion 11qc may be changed so as to have an inclined portion that changes in a curved shape from the base end portion 11qb toward the input / output terminal 11p.
  • 23A and 23B are diagrams schematically showing the configuration of the short-circuit end 11u in the common waveguide 11A of the first modification of the third embodiment. As shown in FIGS.
  • the short-circuit end 11u is an annular base end portion 11ub forming a plane orthogonal to the tube axis Ax, and the base end portion 11ub to the input / output terminal of the common waveguide 11A. It has a protrusion 11 uc that projects toward it.
  • the protrusion 11 uc has an elliptical columnar tip portion 11 ut on its own main body portion, and has an inclined portion that changes in a curved shape from the base end portion 11 ub toward the input / output terminal of the common waveguide 11 A. ing.
  • the protrusion 11qc of the present embodiment has a cross section that continuously changes from the base end portion 11qb toward the input / output terminal 11p, but is limited to this. It's not a thing.
  • the shape of the protrusion 11qc may be changed so as to have a cross section that gradually changes from the base end portion 11qb toward the input / output terminal 11p.
  • 24A and 24B are diagrams schematically showing the configuration of the short-circuit end 11s in the common waveguide 11B of the second modification of the third embodiment. As shown in FIGS.
  • the short-circuit end 11s is an annular base end portion 11sb forming a plane orthogonal to the tube axis Ax, and the base end portion 11sb to the input / output terminal of the common waveguide 11B. It has a protrusion 11 sc that projects toward it.
  • the protruding portion 11sc has an elliptical columnar tip portion 11st on its own main body portion, and has a cross section that gradually changes from the base end portion 11sb toward the input / output terminal of the common waveguide 11B. There is.
  • the short-circuit end 11v is an annular base end portion 11vb forming a plane orthogonal to the tube axis Ax, and the base end portion 11vb to the input / output terminal of the common waveguide 11C. It has a quadrangular pyramid-shaped protrusion 11 vc that protrudes toward it.
  • the protrusion 11vc has a square columnar tip portion 11vt on its own main body portion. Note that the example of FIG.
  • the 25A has a cross section that continuously changes from the base end portion 11vb toward the input / output terminal of the common waveguide 11C, but is not limited to this.
  • the shape of the protrusion 11vc may be changed so as to have a cross section that changes stepwise from the base end portion 11vb toward the input / output terminal of the common waveguide 11C.
  • the protrusion 11qc of the demultiplexer 3 has a tip portion 11qt, and the tip portion 11qt is a position offset (eccentric) from the tube axis Ax of the common waveguide 11. It is located in. Since the effect of blocking signal propagation between the rectangular waveguides 20 and 30 is improved by such a tip portion 11qt, it is possible to improve the partial wave separation characteristic.
  • FIG. 26 is a perspective view showing a schematic configuration of a demultiplexer 4 according to a fourth embodiment of the present invention.
  • FIG. 27 is a rear view of the demultiplexer 4 shown in FIG. 26.
  • the deflector 4 of the present embodiment is configured to include a common waveguide 12 and rectangular waveguides 21 and 31 branching from the side wall of the common waveguide 12.
  • the common waveguide 112 includes a waveguide portion 13 composed of a circular waveguide having a tube axis Ax parallel to the Z-axis direction, and a coupling guide that is longitudinally connected to the waveguide portion 13 and functions as an impedance transformer. It includes a waveguide 14.
  • An input / output terminal 13p is provided at one end of the waveguide portion 13.
  • the coupled waveguide section 14 a circular waveguide having a cross-sectional dimension different from that of the waveguide section 13 can be used.
  • one end of the coupled waveguide section 14 is provided with a short-circuit end 14q having a structure similar to that of any of the short-circuit ends of the first to third embodiments.
  • the rectangular waveguide (first rectangular waveguide) 21 is connected to a rectangular waveguide portion 22 having an input / output terminal 22p and a coupling guide that is vertically connected to the rectangular waveguide portion 22 and functions as an impedance modifier. It includes a waveguide 23.
  • a rectangular waveguide having a cross-sectional dimension different from that of the rectangular waveguide section 22 can be used.
  • the rectangular waveguide (second rectangular waveguide) 31 is connected to a rectangular waveguide portion 32 having an input / output terminal 32p and a coupling guide that is longitudinally connected to the rectangular waveguide portion 32 and functions as an impedance modifier. It includes a waveguide 33.
  • a rectangular waveguide having a cross-sectional shape different from that of the rectangular waveguide section 32 can be used.
  • Coupled waveguides 14, 23, 33 that function as an impedance transformer in this way, impedance matching can be easily achieved, and even better decentralized wave characteristics can be realized.
  • each of the coupled waveguide portions 14, 23, and 33 is provided in only one stage, but the present invention is not limited to this, and two or more stages of coupled waveguide portions are provided. You may.
  • 29A and 29B are diagrams showing a schematic configuration of a demultiplexer 4B of the second modification of the fourth embodiment.
  • the configuration of the demultiplexer 4B is as shown in FIG. 26, except that the short-circuited ends 14q and the coupled waveguides 23 and 33 form a continuous outer wall surface (cut plane). This is the same as the configuration of the deflector 4 of Form 4.
  • the short-circuit end 14q has the same structure as the short-circuit end 11q shown in FIG.
  • FIG. 30 is a graph showing a calculation example of the reflection characteristic of the demultiplexer 4B of the second modification
  • FIG. 31 is a graph showing a calculation example of the interpolar isolation characteristic of the demultiplexer 4B. is there.
  • the horizontal axis of the graphs of FIGS. 30 and 31 indicates the normalized frequency.
  • the vertical axis of the graph of FIG. 30 shows the amount of reflection (unit: dB) of the input / output terminals 22p and 32p of the rectangular waveguides 21 and 31.
  • the solid line represents the reflection amount of the input / output terminal 22p of the rectangular waveguide 21
  • the dotted line represents the reflection amount of the input / output terminal 32p of the rectangular waveguide 31.
  • the vertical axis of the graph of FIG. 31 is the amount (isolation between polarizations) that one linearly polarized wave input from the input / output terminal 13p of the common waveguide 12 is output to the input / output terminal (branch terminal) that is not originally output.
  • the ratio: XPD) (unit: dB) is shown.
  • the solid line represents the amount output to the input / output terminal 22p of the rectangular waveguide 21
  • the dotted line represents the amount output to the input / output terminal 32p of the rectangular waveguide 31.
  • both the solid line and the dotted line almost overlap and show the same decentralized wave characteristics, and the reflection amount is 25 dB and the isolation between polarizations is 25 dB or more in a specific band of 15% or more. It was confirmed that good partial isolation characteristics can be obtained.
  • Embodiments 1 to 4 and modified examples thereof according to the present invention have been described above with reference to the drawings, but embodiments 1 to 4 and modified examples thereof are examples of the present invention, and various other examples. There may also be embodiments. Within the scope of the present invention, it is possible to freely combine the above embodiments 1 to 4, modify any component of each embodiment, or omit any component of each embodiment.
  • the above-mentioned common waveguides 10, 11, 11A to 11C, 12 are all circular waveguides, but the present invention is not limited thereto.
  • a square waveguide may be used instead of the circular waveguide.
  • a square waveguide it has the effect of facilitating manufacturing by cutting.
  • the 90-degree hybrid coupler 9 of FIG. 14 may be connected to the demultiplexers 2 to 4 of the second to fourth embodiments.
  • the demultiplexer according to the present invention is suitable for use in, for example, a radio telescope for astronomical observation, a satellite communication system, and an antenna device in a satellite broadcasting system.

Landscapes

  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)

Abstract

L'invention concerne un coupleur de polarisation (1) comprenant : un tube de guidage d'onde commun (10) qui présente une extrémité court-circuitée (10q) et une borne d'entrée/sortie (10p) et qui comporte un espace de guidage d'onde (10h) pour permettre la transmission d'une première onde polarisée et d'une seconde onde polarisée orthogonales l'une à l'autre ; un premier tube de guidage d'onde rectangulaire (20) qui est relié à la paroi latérale du tube de guidage d'onde commun (10) et qui s'étend dans une première direction croisant la direction de l'axe du tube (Ax) ; et un second tube de guidage d'onde rectangulaire (30) qui est relié à la paroi latérale du tube de guidage d'onde commun (10) et qui s'étend dans une seconde direction croisant la direction de l'axe du tube (Ax). L'extrémité court-circuitée (10q) a une partie d'extrémité de base (10 qb) qui forme une surface orthogonale à la direction de l'axe du tube (Ax). Le premier tube de guidage d'onde rectangulaire (20) a une paire de surfaces de paroi large qui sont inclinées à un angle de 45 degrés par rapport à la partie d'extrémité de base (10 qb) sur une surface perpendiculaire à la première direction, tandis que le second tube de guidage d'onde rectangulaire (30) a une paire de surfaces de paroi large qui sont inclinées à un angle de 45 degrés par rapport à la partie d'extrémité de base (10 qb) sur une surface perpendiculaire à la seconde direction.
PCT/JP2019/030527 2019-08-02 2019-08-02 Coupleur de polarisation WO2021024310A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021538534A JP7012910B2 (ja) 2019-08-02 2019-08-02 偏分波器
PCT/JP2019/030527 WO2021024310A1 (fr) 2019-08-02 2019-08-02 Coupleur de polarisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/030527 WO2021024310A1 (fr) 2019-08-02 2019-08-02 Coupleur de polarisation

Publications (1)

Publication Number Publication Date
WO2021024310A1 true WO2021024310A1 (fr) 2021-02-11

Family

ID=74503379

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/030527 WO2021024310A1 (fr) 2019-08-02 2019-08-02 Coupleur de polarisation

Country Status (2)

Country Link
JP (1) JP7012910B2 (fr)
WO (1) WO2021024310A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113937438A (zh) * 2021-11-11 2022-01-14 中国电子科技集团公司第二十九研究所 一种双口输出微波模式变换装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015207863A (ja) * 2014-04-18 2015-11-19 三菱電機株式会社 偏分波器
JP2016134639A (ja) * 2015-01-15 2016-07-25 三菱電機株式会社 偏波分離回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402089A (en) * 1993-11-12 1995-03-28 Hughes Aircraft Company Asymmetrically coupled TE21 coupler
US7791431B2 (en) 2006-12-04 2010-09-07 Electronics And Telecommunications Research Institute 3-port orthogonal mode transducer and receiver and receiving method using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015207863A (ja) * 2014-04-18 2015-11-19 三菱電機株式会社 偏分波器
JP2016134639A (ja) * 2015-01-15 2016-07-25 三菱電機株式会社 偏波分離回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113937438A (zh) * 2021-11-11 2022-01-14 中国电子科技集团公司第二十九研究所 一种双口输出微波模式变换装置及方法

Also Published As

Publication number Publication date
JPWO2021024310A1 (ja) 2021-10-21
JP7012910B2 (ja) 2022-01-28

Similar Documents

Publication Publication Date Title
US9742069B1 (en) Integrated single-piece antenna feed
ES2909240T3 (es) Transductor ortomodo
US8493161B2 (en) Compact excitation assembly for generating a circular polarization in an antenna and method of fashioning such a compact excitation assembly
US9887458B2 (en) Compact butler matrix, planar two-dimensional beam-former and planar antenna comprising such a butler matrix
US9755291B2 (en) Compact bipolarization power splitter, array of a plurality of splitters, compact radiating element and planar antenna comprising such a splitter
WO2008069358A1 (fr) Antenne de type en réseau à cornet
JP6463092B2 (ja) デュアルバンド同軸アンテナフィードのためのマッチング及びパターン制御
US6847270B2 (en) Waveguide group branching filter
US10135150B2 (en) Quasi-optical beamformer with lens and plane antenna comprising such a beamformer
EP1612888A1 (fr) Dispositif d'antenne
US10992050B2 (en) Antenna device and array antenna device
JP7012910B2 (ja) 偏分波器
US10236589B2 (en) Active antenna architecture with reconfigurable hybrid beamforming
US11791530B2 (en) Waveguide power divider
JP6865903B2 (ja) 給電回路
US11476553B2 (en) Wideband orthomode transducer
JP2015207863A (ja) 偏分波器
JP7305079B2 (ja) 偏分波器
JPWO2019111353A1 (ja) 導波管方向性結合器及び偏波分離回路
Froppier et al. Distribution of the radiation function on the filter structure
JP2020188377A (ja) ターンスタイル型偏分波器
JP2006246314A (ja) 偏分波器
CN103594818A (zh) 薄基片相位校正槽线差波束平面喇叭天线
JP2015082759A (ja) 偏波分離回路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19940708

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021538534

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19940708

Country of ref document: EP

Kind code of ref document: A1