CN210040474U - Microwave frequency band OMT with coaxial waveguide structure - Google Patents
Microwave frequency band OMT with coaxial waveguide structure Download PDFInfo
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- CN210040474U CN210040474U CN201921163589.1U CN201921163589U CN210040474U CN 210040474 U CN210040474 U CN 210040474U CN 201921163589 U CN201921163589 U CN 201921163589U CN 210040474 U CN210040474 U CN 210040474U
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Abstract
The utility model discloses a microwave frequency channel's OMT of coaxial waveguide structure, a serial communication port, circular waveguide pipe and central metallic waveguide including coaxial setting, central metallic waveguide is located in the circular waveguide pipe the lateral part of circular waveguide pipe is equipped with the first standard rectangle waveguide mouth of quadrature, the standard rectangle waveguide mouth of second be equipped with in the circular waveguide pipe respectively with first standard rectangle waveguide mouth a plurality of first metal needles, a plurality of second metal needles, each that the standard rectangle waveguide mouth of second is parallel first metal needle and each the one end of second metal needle with the interior wall connection of circular waveguide pipe, the other end with central metallic waveguide connects. The utility model provides an OMT adopts coaxial waveguide's design, and the low band OMT conversion is realized to the excircle, and the high band energy transmission is realized to the interior circle, and both are concentric, can ensure through this kind of structure that can independently go on between the transmission of two frequency channels.
Description
Technical Field
The utility model relates to a microwave antenna technical field especially relates to a microwave frequency channel's OMT of coaxial waveguide structure.
Background
Orthogonal mode converters, also known as dual mode transformers or Orthogonal Modes (OMTs), are an important component of multi-polarized antenna systems and have been used for quite a few years. In engineering, the communication capacity of the antenna is improved by using the orthogonal mode converter, the total amount of channels can be increased by simultaneously using two channels which have different polarization modes and are isolated from each other under the same frequency, and the problem of frequency reuse can be solved by connecting the orthogonal mode converter with a filter.
The OMT can simultaneously realize the transmission and the reception of two paths of signals with vertical polarization and horizontal polarization. Common OMTs can be divided into a split OMT and a direct-buckled OMT, the split OMT is connected with the ODU through a soft waveguide, and the direct-buckled OMT can be directly buckled on the ODU to save the cost of the soft waveguide. Traditional disconnect-type OMT is come out through whole processing, and structural style is simple, and direct knot formula OMT is comparatively complicated owing to need link to each other with the ODU is direct. However, in any form of OMT, energy transmission in a single frequency band is currently performed, which has a great application limitation.
Disclosure of Invention
To the problem that exists among the prior art, the utility model aims to provide a simple structure, with low costs, can realize two frequency channel energy transmission's OMT.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
The utility model provides a microwave band's OMT of coaxial waveguide structure, its characterized in that, including the circular waveguide pipe and the central metal waveguide of coaxial setting, central metal waveguide is located in the circular waveguide pipe the lateral part of circular waveguide pipe is equipped with orthogonal first standard rectangle waveguide mouth, second standard rectangle waveguide mouth be equipped with in the circular waveguide pipe respectively with first standard rectangle waveguide mouth, parallel a plurality of first metal needles of second standard rectangle waveguide mouth, a plurality of second metal needle, each first metal needle and each the one end of second metal needle with the inner wall of circular waveguide pipe is connected, the other end with central metal waveguide connects.
More preferably, the circular waveguide, the first standard rectangular waveguide port, the second standard rectangular waveguide port, and the first metal pin constitute an OMT of a low frequency band, and the first metal pin and the second metal pin mainly perform polarization energy separation and transmission of the low frequency band; the central metal waveguide transmits primarily high band energy.
More preferably, the central metal waveguide is a metal tube.
More preferably, the first standard rectangular waveguide port and the second standard rectangular waveguide port are arranged in the axial direction of the circular waveguide in a front-rear direction.
More preferably, the first metal pins are parallel to each other, and the second metal pins are parallel to each other.
More preferably, the first metal needle and the second metal needle are respectively disposed behind the corresponding standard rectangular waveguide port.
More preferably, a plurality of adjusting screws are arranged in the cavity of the circular waveguide tube.
More preferably, the circular waveguide propagates in the operating frequency band with a main mode of TE11 mode.
More preferably, the OMT has an operating frequency band of 14.4 GHz-15.35 GHz, and the central metal waveguide is an 80GHz circular waveguide.
The utility model has the advantages that:
the OMT provided by the utility model adopts the design mode of coaxial waveguide, realizes the OMT conversion of low frequency band by utilizing the excircle waveguide tube, realizes the energy transmission of high frequency band by utilizing the inner circle center metal waveguide, and has the advantages of concentric structure, simple structure and low manufacturing cost; and, through this kind of structure can guarantee to carry out independently between the transmission of two frequency channels.
Drawings
Fig. 1 is a schematic structural diagram of the coaxial waveguide structure OMT according to the present invention.
Fig. 2 is a cross-sectional view of the coaxial waveguide structure OMT according to the present invention.
Fig. 3 shows the S parameter performance of the coaxial waveguide structure OMT at 15GHz according to the present invention.
Fig. 4 shows the isolation performance of the OMT of the coaxial waveguide structure according to the present invention at 15 GHz.
Description of reference numerals:
1: circular waveguide, 2: first standard rectangular waveguide port, 3: second standard rectangular waveguide port, 4: central metal waveguide, 5: first metal needle, 5-1: second metal needle, 6: and adjusting the screw.
Detailed Description
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following description will be further made in conjunction with the accompanying drawings of the specification, so that the technical solution and the advantages of the present invention are clearer and clearer. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
As shown in fig. 1 and 2, an OMT for microwave band of a coaxial waveguide structure includes: the circular waveguide tube comprises a circular waveguide tube 1 and a central metal waveguide 4 which are coaxially arranged, wherein the central metal waveguide 4 is positioned in the circular waveguide tube 1, a first standard rectangular waveguide port 2 and a second standard rectangular waveguide port 3 which are orthogonal are arranged on the side portion of the circular waveguide tube 1, a plurality of first metal needles 5 and a plurality of second metal needles 5-1 which are parallel to the first standard rectangular waveguide port 2 and the second standard rectangular waveguide port 3 respectively are arranged in the circular waveguide tube 1, one end of each first metal needle 5 and one end of each second metal needle 5-1 are connected with the inner wall of the circular waveguide tube 1, and the other end of each first metal needle 5 and the other end of each second metal needle 5-1 are connected with the central metal waveguide 4.
The circular waveguide tube 1, the first standard rectangular waveguide port 2, the second standard rectangular waveguide port 3 and the first metal needle 5 form an OMT (orthogonal transformation Table) with a low frequency band, and the first metal needle 5 and the second metal needle 5-1 mainly perform polarized energy separation and transmission with the low frequency band; the central metal waveguide 4 is a metal tube, which mainly transmits high-frequency band energy.
The first standard rectangular waveguide port 2 and the second standard rectangular waveguide port 3 are arranged back and forth along the axial direction of the circular waveguide tube 1, and mainly function in guiding signals into the cavity of the circular waveguide tube 1 or transmitting signals out of the cavity.
The first metal needles 5 are parallel to each other, the second metal needles 5-1 are parallel to each other, and the first metal needles 5 and the second metal needles 5-1 are respectively arranged behind corresponding standard rectangular waveguide ports so as to reflect signals.
Preferably, a plurality of adjusting screws 6 are further arranged in the cavity of the circular waveguide tube 1 for adjusting standing waves.
Further, the main mode of the circular waveguide 1 propagating in the operating frequency band is the TE11 mode.
During specific work, the OMT is realized in such a way that low-frequency-band electric signals are respectively transmitted from the first standard rectangular waveguide port 2 and the second standard rectangular waveguide port 3, at the moment, the two signals are in an orthogonal state, the signals transmitted from the first standard rectangular waveguide port 2 are reflected by a backward short circuit of the first metal needle 5, are transmitted forward, are short-circuited by the second metal needle 5-1, are subjected to polarization energy purification, and are transmitted forward. And the signal transmitted from the second standard rectangular waveguide port 3 is reflected by the short circuit of the second metal needle 5-1 in the backward direction and transmitted forward. The central metal waveguide 4 in the middle does not change the polarization of the signal.
With reference to fig. 3 and 4, the utility model provides a pair of coaxial waveguide structure 'S microwave frequency channel' S OMT, when it was applied to 14.4GHz ~ 15.35GHz, central metal waveguide for 80GHz circular waveguide, the reflection coefficient | S | of two standard rectangular waveguide mouths of low band all satisfied below-21 dB, and the isolation of two standard rectangular waveguide mouths satisfies below-54 dB.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to fall within the scope of the invention, which is defined by the claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (9)
1. The utility model provides a microwave band's OMT of coaxial waveguide structure, its characterized in that, including the circular waveguide pipe and the central metal waveguide of coaxial setting, central metal waveguide is located in the circular waveguide pipe the lateral part of circular waveguide pipe is equipped with orthogonal first standard rectangle waveguide mouth, second standard rectangle waveguide mouth be equipped with in the circular waveguide pipe respectively with first standard rectangle waveguide mouth, parallel a plurality of first metal needles of second standard rectangle waveguide mouth, a plurality of second metal needle, each first metal needle and each the one end of second metal needle with the inner wall of circular waveguide pipe is connected, the other end with central metal waveguide connects.
2. The OMT of claim 1, wherein the circular waveguide, the first standard rectangular waveguide port, the second standard rectangular waveguide port, and the first metal pin constitute a low-band OMT, and the first metal pin and the second metal pin mainly perform low-band polarized energy separation and transmission; the central metal waveguide transmits primarily high band energy.
3. The OMT according to claim 1, wherein the central metal waveguide is a metal tube.
4. The OMT of claim 1, wherein the first and second standard rectangular waveguide ports are disposed back and forth along an axial direction of the circular waveguide.
5. The OMT according to claim 1, wherein the first metal pins are parallel to each other and the second metal pins are parallel to each other.
6. The OMT according to claim 1, wherein the first metal needle and the second metal needle are each disposed behind a respective standard rectangular waveguide port.
7. The OMT according to claim 1, wherein a plurality of adjustment screws are provided within the cavity of the circular waveguide.
8. The OMT according to claim 1, wherein the circular waveguide propagates with a primary mode in the operating frequency band which is the TE11 mode.
9. The OMT according to claim 1, wherein the operating frequency band is 14.4GHz to 15.35GHz and the central metal waveguide is an 80GHz circular waveguide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921163589.1U CN210040474U (en) | 2019-07-23 | 2019-07-23 | Microwave frequency band OMT with coaxial waveguide structure |
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| CN201921163589.1U CN210040474U (en) | 2019-07-23 | 2019-07-23 | Microwave frequency band OMT with coaxial waveguide structure |
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| CN210040474U true CN210040474U (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380161A (en) * | 2019-07-23 | 2019-10-25 | 广东盛路通信科技股份有限公司 | A kind of OMT of the microwave frequency band of coaxial waveguide structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380161A (en) * | 2019-07-23 | 2019-10-25 | 广东盛路通信科技股份有限公司 | A kind of OMT of the microwave frequency band of coaxial waveguide structure |
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