A broadband orthomode coupler

Abstract

The present invention relates to the field of wireless communication technologies and provides a broadband orthomode coupler. The broadband orthomode coupler provided by the present invention includes side-arm waveguides, straight-arm waveguides, T-shaped transmission waveguide feed waveguides, T-shaped transmission waveguides, and T-shaped waveguide to rectangular waveguide transition waveguides; the straight-arm waveguides, T-shaped transmission waveguides, T-shaped transmission waveguide feed waveguides, and T-shaped waveguide to rectangular waveguide transition waveguides are connected and communicated to form a horizontal polarization wave channel for transmitting horizontal polarization waves; the side-arm waveguides, T-shaped transmission waveguides, T-shaped transmission waveguide feed waveguides, and T-shaped waveguide to rectangular waveguide transition waveguides are connected and communicated to form a vertical polarization wave channel for transmitting vertical polarization waves. This broadband orthomode coupler can extend the gradual change length, enabling the high-order mode suppression to achieve broadband characteristics, solving the disadvantage of the complex structure of the current broadband orthomode coupler, and having a simple structure, small volume, and being easy to process.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to a broadband orthomode coupler. Background Art

[0002] With the rapid development of wireless communication, the communication capacity is constantly increasing. To make full use of spectrum resources, a common transceiver scheme is usually adopted for antennas nowadays. Among them, the orthomode coupler, as the feed of the common transceiver dual-polarized antenna, is a key component for realizing the dual-polarized antenna.

[0003] An antenna is a transceiver device of a wireless communication system. With the development of the wireless communication system, the required bandwidth is getting wider and wider. And the orthomode coupler, as the feed of the dual-polarized antenna, also requires a wider bandwidth. Currently, the design methods of existing broadband orthomode couplers can be divided into two categories. One is the Boifot-type orthomode coupler, which can achieve a bandwidth of about 30%. The other is the Turnstile-type orthomode coupler-based one, which can achieve a bandwidth of more than 40%. There are still many difficult problems to be solved in the above two types of broadband orthomode couplers, such as complex structure, difficult processing in technology, large structural size and difficulty in miniaturization, etc. And currently, the non-symmetric structure orthomode coupler with a simple and miniaturized structure still has obvious deficiencies in performance, and the bandwidth is difficult to break through 20%, which cannot meet the requirements of the broadband characteristics of the new generation of wireless communication. Summary of the Invention

[0004] To overcome the deficiencies in the prior art, the present invention provides a broadband orthomode coupler.

[0005] A broadband orthomode coupler provided by the present invention includes a side arm waveguide, a straight arm waveguide, a T-shaped transmission waveguide feed waveguide, a T-shaped transmission waveguide, and a T-shaped waveguide to rectangular waveguide transition waveguide;

[0006] The straight arm waveguide, the T-shaped transmission waveguide, the T-shaped transmission waveguide feed waveguide, and the T-shaped waveguide to rectangular waveguide transition waveguide are connected and communicated to form a horizontal polarization wave channel for transmitting horizontal polarization waves;

[0007] The side arm waveguide, the T-shaped transmission waveguide, the T-shaped transmission waveguide feed waveguide, and the T-shaped waveguide to rectangular waveguide transition waveguide are connected and communicated to form a vertical polarization wave channel for transmitting vertical polarization waves;

[0008] The T-shaped transmission waveguide feed waveguide is used to feed the horizontal polarization wave and the vertical polarization wave and input them into the T-shaped waveguide to rectangular waveguide transition waveguide; the T-shaped waveguide to rectangular waveguide transition waveguide is used to transition from the T-shaped transmission waveguide to the rectangular waveguide.

[0009] In a possible implementation, the T-shaped transmission waveguide includes a first rectangular transmission waveguide and a second rectangular transmission waveguide that intersect perpendicularly. The narrow side of one side of the second rectangular transmission waveguide is connected to the long side of one side of the first rectangular transmission waveguide to form the T-shaped transmission waveguide.

[0010] In a possible implementation, the feeding waveguide of the T-shaped transmission waveguide is formed by the perpendicular intersection of an E-plane turning waveguide and a rectangular turning waveguide; the narrow side of one side of the rectangular turning waveguide is connected to the long side of one side of the E-plane turning waveguide to form a T-shaped transmission port to be docked with the T-shaped transmission waveguide.

[0011] In a possible implementation, the transition waveguide from the T-shaped waveguide to the rectangular waveguide is formed by two pyramidal structures symmetrically arranged with respect to the vertical polarization wave channel.

[0012] In a possible implementation, one end of the side arm waveguide has the same size as the feeding waveguide of the T-shaped transmission waveguide, and the other end has the same size as the standard waveguide.

[0013] In a possible implementation, one end of the straight arm waveguide has the same size as the feeding waveguide of the T-shaped transmission waveguide, and the other end has the same size as the standard waveguide.

[0014] In a possible implementation, the side arm waveguide is connected to the T-shaped transmission waveguide through the feeding waveguide of the T-shaped transmission waveguide.

[0015] In a possible implementation, the straight arm waveguide, the feeding waveguide of the T-shaped transmission waveguide, and the T-shaped transmission waveguide are connected.

[0016] In a possible implementation, the transmission direction of the electromagnetic wave in the straight arm waveguide is perpendicular to the transmission direction of the electromagnetic wave in the side arm waveguide.

[0017] In a possible implementation, both the straight arm waveguide and the side arm waveguide are connected to the T-shaped transmission waveguide through the feeding waveguide of the T-shaped transmission waveguide.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The straight arm waveguide and the side arm waveguide are respectively connected to the T-shaped transmission waveguide. The horizontal polarization wave and the vertical polarization wave are respectively input into the straight arm waveguide and the side arm waveguide, and are fed into through the T-shaped structure of the T-shaped transmission waveguide, and then input into the transition waveguide from the T-shaped waveguide to the rectangular waveguide. Due to the high-order mode suppression achieved by the T-shaped transmission waveguide with broadband transmission characteristics and the transition structure from the T-shaped transmission waveguide to the rectangular waveguide, a wideband characteristic is realized.

[0020] 2. The broadband orthogonal mode coupler is formed by connecting the side arm waveguide, the straight arm waveguide, the T-shaped transmission waveguide, and the T-shaped waveguide to rectangular waveguide transition waveguide. It adopts an asymmetric structure, has a simple structure, is easy to process, and has the advantages of a compact structure and a small volume, making it more suitable for the feeder network of a dual-polarized array antenna.

[0021] 3. Please refer to Figures 7 - 9 , which successively shows the return loss curve graph, the insertion loss curve graph, and the isolation curve graph of the broadband orthogonal mode coupler. The return loss curve graph shows the return loss of the two input waveguide ports of the broadband orthogonal mode coupler. When the operating frequency is 22.5 - 39 GHz, the bandwidth is greater than 50%. The insertion loss curve graph shows the insertion loss of the horizontal polarization wave channel and the vertical polarization wave channel. Within the operating frequency range, the insertion loss is lower than 0.25 dB. The isolation curve graph gives the isolation of the two input waveguide ports of the broadband orthogonal mode coupler, and the isolation is greater than -40 dB throughout the overall frequency operating range. In summary, this broadband orthogonal mode coupler has high isolation characteristics and low loss characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 is a three-dimensional structural schematic diagram of the broadband orthogonal mode coupler of the present invention;

[0024] Figure 2 is a side view of the broadband orthogonal mode coupler of the present invention;

[0025] Figure 3 is a front view of the broadband orthogonal mode coupler of the present invention;

[0026] Figure 4 is a cross-sectional view of the broadband orthogonal mode coupler of the present invention;

[0027] Figure 5 is a schematic diagram of the internal channels of each waveguide in the broadband orthogonal mode coupler of the present invention being materialized;

[0028] Figure 6 is a schematic diagram of the broadband orthogonal mode coupler of the present invention after being cut along its symmetry center line;

[0029] Figure 7 is a return loss curve graph of the broadband orthogonal mode coupler of the present invention;

[0030] Figure 8 is the insertion loss curve graph of the broadband orthogonal mode coupler of the present invention;

[0031] Figure 9 is the isolation curve graph of the broadband orthogonal mode coupler of the present invention.

[0032] Description of main component symbols:

[0033] 100 - First input waveguide port; 200 - Second input waveguide port; 300 - Common output waveguide; 400 - Side arm waveguide; 410 - Side arm waveguide channel; 500 - Straight arm waveguide; 510 - Straight arm waveguide channel; 600 - T-shaped transmission waveguide feeding waveguide; 610 - E-plane turning waveguide; 611 - E-plane turning waveguide channel; 620 - Rectangular turning waveguide; 621 - Rectangular turning waveguide channel; 700 - T-shaped transmission waveguide; 710 - Second rectangular transmission waveguide; 711 - Second rectangular transmission waveguide channel; 720 - First rectangular transmission waveguide; 721 - First rectangular transmission waveguide channel; 800 - T-shaped waveguide to square waveguide transition waveguide; 810 - First tapered waveguide; 811 - First tapered waveguide channel; 820 - Second tapered waveguide; 821 - Second tapered waveguide channel. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly specified or limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] Embodiment 1

[0040] As Figures 1 - 6 shown, a broadband orthomode coupler includes a side arm waveguide 400, a straight arm waveguide 500, a T-shaped transmission waveguide feeding waveguide 600, a T-shaped transmission waveguide 700, and a T-shaped waveguide to rectangular waveguide transition waveguide 800;

[0041] The straight arm waveguide 500, the T-shaped transmission waveguide 700, the T-shaped transmission waveguide feeding waveguide 600, and the T-shaped waveguide to rectangular waveguide transition waveguide 800 are in communication to form a horizontal polarization wave channel for transmitting horizontal polarization waves;

[0042] The side arm waveguide 400, the T-shaped transmission waveguide 700, the T-shaped transmission waveguide feeding waveguide 600, and the T-shaped waveguide to rectangular waveguide transition waveguide 800 are in communication to form a vertical polarization wave channel for transmitting vertical polarization waves;

[0043] The T-shaped transmission waveguide feeding waveguide 600 is used to feed the horizontal polarization wave and the vertical polarization wave and input them into the T-shaped waveguide to rectangular waveguide transition waveguide 800; the T-shaped waveguide to rectangular waveguide transition waveguide 800 is used to transition from the T-shaped waveguide to the rectangular waveguide to suppress high-order modes.

[0044] The side arm waveguide 400 is in communication with the T-shaped transmission waveguide 700 through the T-shaped transmission waveguide feeding waveguide 600.

[0045] The straight-arm waveguide 500 is connected to the T-shaped transmission waveguide feeding waveguide 600 and the T-shaped transmission waveguide 700.

[0046] Both the straight-arm waveguide 500 and the side-arm waveguide 400 are connected to the T-shaped transmission waveguide 700 through the T-shaped transmission waveguide feeding waveguide 600.

[0047] The broadband orthomode coupler includes two input waveguide ports. One is the first input waveguide port 100 on the side-arm waveguide 400, and the first input waveguide port 100 is a WR28 standard waveguide port. The width of the first input waveguide port is 3.555 mm, the length is 7.11 mm, and the height is 5.7 mm. The other is the second input waveguide port 200 on the straight-arm waveguide 500. The second input waveguide port 200 is also a WR28 standard waveguide port, and its length and width are the same as those of the first input waveguide port 100 on the side-arm waveguide 400, and its height is 9.5 mm.

[0048] The T-shaped waveguide can feed two signals. Therefore, the horizontally polarized wave is input through the first input waveguide port 100 and then fed into the T-shaped transmission waveguide 700. The vertically polarized wave is input through the second input waveguide port 200 and then also fed into the T-shaped transmission waveguide 700. The T-shaped transmission waveguide 700 inputs the horizontally polarized wave and the vertically polarized wave into the T-shaped waveguide to the square waveguide transition waveguide 800.

[0049] When other structures of the broadband orthomode coupler remain unchanged, the signal bandwidth can be expanded by increasing the length of the T-shaped waveguide to the square waveguide transition waveguide 800. Therefore, this device also provides a new design idea, that is, the designer can make a trade-off between the size of the T-shaped waveguide to the square waveguide transition waveguide 800 and the signal bandwidth to be expanded to meet the appropriate design requirements.

[0050] As Figure 4 shown, in some embodiments, the side-arm waveguide 400 is connected to the T-shaped transmission waveguide 700 through the E-plane turning waveguide 610; the E-plane turning waveguide 610 is serially connected to the side-arm waveguide 400 and the T-shaped transmission waveguide 700 respectively to form a conductive vertically polarized wave input channel.

[0051] In some embodiments, the transmission direction of the electromagnetic wave in the straight-arm waveguide 500 is perpendicular to the transmission direction of the electromagnetic wave in the side-arm waveguide 400.

[0052] In some embodiments, the T-shaped waveguide to the square waveguide transition waveguide is used to extend the gradual change length, so it is generally in a longer square structure.

[0053] In some embodiments, the T-waveguide to square waveguide transition waveguide 800 is formed by two pyramid structures symmetrically arranged about the vertical polarization wave channel. The length of the pyramid structure is 38 mm, and the height of the matching pyramid is 4.27 mm.

[0054] In some embodiments, one end of the side arm waveguide 400 has the same size as the T-type transmission waveguide feeding waveguide 600 and the other end has the same size as the standard waveguide to achieve transition with the standard waveguide port.

[0055] In some embodiments, one end of the straight arm waveguide 500 has the same size as the T-type transmission waveguide feeding waveguide 600, and the other end has the same size as the standard waveguide, so as to achieve a transition with the standard waveguide port.

[0056] like Figure 4 As shown, in some embodiments, a T-waveguide to square waveguide transition waveguide 800 includes a first tapered sub-waveguide 810 and a second tapered sub-waveguide 820. The inclined surface of the first tapered sub-waveguide 810 coincides with the inclined surface of the second tapered sub-waveguide 820, and the two are internally connected to form the T-waveguide to square waveguide transition waveguide 800.

[0057] like Figure 4 As shown, in some embodiments, the broadband orthogonal mode coupler further includes a common output waveguide 300. The common output waveguide 300 connects to the end of the T-waveguide to square waveguide transition waveguide 800 away from the square waveguide, and is configured to output two orthogonally polarized electromagnetic waves. The propagation direction of the electromagnetic waves in the common output waveguide 300 is parallel to the propagation direction of the electromagnetic waves in the straight arm waveguide 500, and is perpendicular to the propagation direction of the electromagnetic waves in the side arm waveguide 400.

[0058] In some embodiments, the common output waveguide 300 is a square waveguide, and the side length of the waveguide opening of the common output waveguide 300 is the same as the length of the WR28 standard waveguide opening, both of which are 7.11 mm, to achieve a wider bandwidth. When the common output waveguide 300 is a square waveguide, the opening of the common output waveguide 300 is connected to the pyramid horn.

[0059] In some other possible embodiments, the common output waveguide 300 is a circular waveguide. In this case, the opening of the common output waveguide 300 is connected to the conical horn. Therefore, the shape of the opening of the common output waveguide 300 is not specifically limited.

[0060] like Figure 4As shown, in some embodiments, the T-shaped transmission waveguide 700 includes a first rectangular transmission waveguide 720 and a second rectangular transmission waveguide 710 that intersect perpendicularly. Both the second rectangular transmission waveguide 710 and the first rectangular transmission waveguide 720 are rectangular waveguides. The narrow side of one side of the second rectangular transmission waveguide 710 is connected to the long side of one side of the first rectangular transmission waveguide 720 to form the T-shaped transmission waveguide 700. The width of the T-shaped transmission waveguide 700 is 2.37 mm.

[0061] In some embodiments, the first rectangular transmission waveguide 720 intersects at the center line of the second rectangular transmission waveguide 710.

[0062] As Figure 4 shown, in some embodiments, both the straight arm waveguide 500 and the side arm waveguide 400 are connected to the T-shaped transmission waveguide 700 through the T-shaped transmission waveguide feeding waveguide 600; the T-shaped transmission waveguide feeding waveguide 600 is formed by the perpendicular intersection of an E-plane turning waveguide 610 and a rectangular turning waveguide 620; the narrow side of one side of the rectangular turning waveguide 620 is connected to the long side of one side of the E-plane turning waveguide 610 to form a T-shaped transmission port to dock with the T-shaped transmission waveguide 700. Among them, the E-plane turning waveguide 610 is a rounded turning waveguide with a radius of 3.8 mm.

[0063] In some embodiments, the rectangular turning waveguide 620 intersects at the center line of the E-plane turning waveguide 610.

[0064] As Figures 4 - 6 shown, a side arm waveguide channel 410 is formed in the side arm waveguide 400. A straight arm waveguide channel 510 is formed in the straight arm waveguide 500. An E-plane turning waveguide channel 611 is formed in the E-plane turning waveguide 610. A rectangular turning waveguide channel 621 is formed in the rectangular turning waveguide 620. A first rectangular transmission waveguide channel 721 is formed in the first rectangular transmission waveguide 720. A second rectangular transmission waveguide channel 711 is formed in the second rectangular transmission waveguide 710. A first tapered power splitting waveguide channel 811 is formed in the first tapered power splitting waveguide 810. A second tapered power splitting waveguide channel 821 is formed in the second tapered power splitting waveguide 820.

[0065] Among them, the side arm waveguide channel 410, the E-plane turning waveguide channel 611, the rectangular turning waveguide channel 621, the first rectangular transmission waveguide channel 721, the second rectangular transmission waveguide channel 711, the first tapered power splitting waveguide channel 811, and the second tapered power splitting waveguide channel 821 are connected to form a vertically polarized wave channel.

[0066] The straight-arm waveguide channel 510, E-plane bend waveguide channel 611, rectangular bend waveguide channel 621, first rectangular transmission waveguide channel 721, second rectangular transmission waveguide channel 711, first tapered power splitter waveguide channel 811, and second tapered power splitter waveguide channel 821 are connected to form a horizontally polarized wave channel.

[0067] As Figures 4 - 6 shown, in some embodiments, the side-arm waveguide transitions to a standard waveguide in a tapered manner to gradually enter the T-shaped transmission waveguide feed waveguide 600. The transmission direction of the electromagnetic wave in the side-arm waveguide 400 is perpendicular to the transmission direction of the electromagnetic wave in the T-shaped transmission waveguide 700.

[0068] In some embodiments, the side-arm waveguide 400 is a rectangular waveguide with unilateral tapering, and a section of the side-arm waveguide 400 opposite to the tapered section of the unilateral tapering is a vertical line segment, so that the cross-section of the side-arm waveguide 400 forms a right trapezoid shape.

[0069] As Figures 4 - 6 shown, in some embodiments, the straight-arm waveguide transitions to a standard waveguide in a tapered manner to gradually enter the T-shaped transmission waveguide feed waveguide 600. The transmission direction of the electromagnetic wave in the straight-arm waveguide 500 is the same as the transmission direction of the electromagnetic wave in the T-shaped transmission waveguide 700.

[0070] In some embodiments, the straight-arm waveguide 500 is a rectangular waveguide with bilateral tapering, and its cross-section is in the shape of an isosceles trapezoid.

[0071] In summary, the horizontally polarized wave is transmitted in the horizontally polarized wave channel formed by sequentially connecting the straight-arm waveguide 500, T-shaped transmission waveguide feed waveguide 600, T-shaped transmission waveguide 700, and T-shaped waveguide to rectangular waveguide transition waveguide 800. The vertically polarized wave is transmitted in the vertically polarized wave channel formed by sequentially connecting the side-arm waveguide 400, T-shaped transmission waveguide feed waveguide 600, T-shaped transmission waveguide 700, and T-shaped waveguide to rectangular waveguide transition waveguide 800.

[0072] The present invention has the following beneficial effects:

[0073] 1. The straight-arm waveguide 500 and the side-arm waveguide 400 are respectively connected to the T-shaped transmission waveguide 700. The horizontally polarized wave and the vertically polarized wave are respectively input into the straight-arm waveguide 500 and the side-arm waveguide 400, fed into by the T-shaped structure of the T-shaped transmission waveguide 700, and input into the T-shaped waveguide to rectangular waveguide transition waveguide 800. Due to the high-order mode suppression achieved by the T-shaped transmission waveguide with broadband transmission characteristics and the transition structure from the T-shaped transmission waveguide to the rectangular waveguide, a wideband characteristic is realized.

[0074] 2. The broadband orthomode coupler is formed by connecting the side-arm waveguide 400, the straight-arm waveguide 500, the T-shaped transmission waveguide 700, and the T-shaped waveguide to rectangular waveguide transition waveguide 800. It adopts an asymmetric structure, which has the advantages of simple structure, easy processing, compact structure, and small volume, and is more suitable for the feed network of dual-polarized array antennas.

[0075] 3. As Figures 7 - 9 shown, it successively shows the return loss curve diagram, insertion loss curve diagram, and isolation degree curve diagram of the broadband orthomode coupler. The return loss curve diagram shows the return loss of the two input waveguide ports of the broadband orthomode coupler, indicating that when the operating frequency is 22.5 - 39 GHz, the bandwidth is greater than 50%. The insertion loss curve diagram shows the insertion losses of the horizontal polarization wave channel and the vertical polarization wave channel, and within the operating frequency range, the insertion losses are all lower than 0.25 dB. The isolation degree curve diagram gives the isolation degree of the two input waveguide ports of the broadband orthomode coupler, and the isolation degree within the overall frequency operating range is greater than -40 dB. In summary, this broadband orthomode coupler has high isolation characteristics and low loss characteristics.

[0076] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0077] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A broadband orthomode coupler, characterized in that, It includes side-arm waveguides, straight-arm waveguides, T-shaped transmission waveguide feed waveguides, T-shaped transmission waveguides, and T-shaped waveguide to rectangular waveguide transition waveguides; The straight-arm waveguide, T-shaped transmission waveguide, T-shaped transmission waveguide feed waveguide, and T-shaped waveguide to rectangular waveguide transition waveguide are connected and communicate with each other to form a horizontal polarization wave channel for transmitting horizontal polarization waves; The side-arm waveguide, T-shaped transmission waveguide, T-shaped transmission waveguide feed waveguide, and T-shaped waveguide to rectangular waveguide transition waveguide are connected and communicate with each other to form a vertical polarization wave channel for transmitting vertical polarization waves; The T-shaped transmission waveguide feed waveguide is used to feed the horizontal polarization wave and the vertical polarization wave and input them into the T-shaped waveguide to rectangular waveguide transition waveguide; the T-shaped waveguide to rectangular waveguide transition waveguide is used to transition from the T-shaped transmission waveguide to the rectangular waveguide; The T-shaped transmission waveguide includes a first rectangular transmission waveguide and a second rectangular transmission waveguide that cross each other perpendicularly. The narrow side of one side of the second rectangular transmission waveguide is connected to the long side of one side of the first rectangular transmission waveguide to form the T-shaped transmission waveguide.

2. The broadband orthogonal mode coupler according to claim 1, wherein The T-shaped transmission waveguide feed waveguide is formed by the perpendicular intersection of an E-plane turning waveguide and a rectangular turning waveguide; the narrow side of one side of the rectangular turning waveguide is connected to the long side of one side of the E-plane turning waveguide to form a T-shaped transmission port to be docked with the T-shaped transmission waveguide.

3. The broadband orthogonal mode coupler according to claim 1, wherein The T-shaped waveguide to rectangular waveguide transition waveguide is formed by two horn structures symmetrically arranged with respect to the vertical polarization wave channel.

4. The broadband orthogonal mode coupler according to claim 1, wherein One end of the side-arm waveguide has the same size as the T-shaped transmission waveguide feed waveguide, and the other end has the same size as the standard waveguide.

5. The broadband orthogonal mode coupler according to claim 1, characterized in that, One end of the straight-arm waveguide has the same size as the T-shaped transmission waveguide feed waveguide, and the other end has the same size as the standard waveguide.

6. The broadband orthogonal-mode coupler according to claim 1, wherein The side-arm waveguide is connected to the T-shaped transmission waveguide through the T-shaped transmission waveguide feed waveguide.

7. The broadband orthogonal mode coupler according to claim 1, wherein The straight-arm waveguide, the T-shaped transmission waveguide feed waveguide, and the T-shaped transmission waveguide are connected and communicate with each other.

8. The broadband orthogonal mode coupler according to claim 1, characterized in that, The transmission direction of the electromagnetic wave in the straight-arm waveguide is perpendicular to the transmission direction of the electromagnetic wave in the side-arm waveguide.

9. The broadband orthogonal mode coupler according to claim 1, wherein Both the straight-arm waveguide and the side-arm waveguide are connected to the T-shaped transmission waveguide through the T-shaped transmission waveguide feed waveguide.

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