CN211320287U - KU wave dual-polarization waveguide - Google Patents
KU wave dual-polarization waveguide Download PDFInfo
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- CN211320287U CN211320287U CN201922035697.7U CN201922035697U CN211320287U CN 211320287 U CN211320287 U CN 211320287U CN 201922035697 U CN201922035697 U CN 201922035697U CN 211320287 U CN211320287 U CN 211320287U
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Abstract
The utility model discloses a KU wave dual polarization waveguide, including the waveguide pipe of hollow structure, the top of waveguide pipe is connected with the waveguide mouth, the bottom of waveguide pipe is sealed, the waveguide still includes via trompil stretch into the inside straight needle and the L type needle of waveguide pipe; the waveguide tube comprises a waveguide tube, wherein the main body of the inner wall of the waveguide tube is of a tubular structure, the inner bottom end of the waveguide tube is a waist drum-shaped plane, and the waist drum-shaped plane comprises 2 parallel straight edges and 2 symmetrically arranged circular arcs; a first step part, a second step part and a third step part which are symmetrically distributed are sequentially arranged at the straight edge along the height direction; the straight needle is close to the bottom setting of waveguide pipe, the L type needle is kept away from the bottom setting of waveguide pipe. The method and the device increase filtering and inhibiting by changing the structural size of the waveguide on the premise of not changing the caliber of the existing waveguide and the condition of a testing method, thereby achieving the purpose of phase shifting.
Description
Technical Field
The utility model relates to a microwave communication technology field especially relates to a KU ripples dual polarization waveguide.
Background
The tuner is used for finishing satellite television signals, performing channel selection, signal amplification and frequency reduction processing, and finally outputting stable intermediate frequency signals. The tuner usually comprises a waveguide, one end of the waveguide is connected with the feed source, and a circuit board box is arranged outside the other end of the waveguide.
The waveguide is an important component of the high-frequency tuner, and the structural characteristics of the waveguide have important influence on the performance of the high-frequency tuner. The existing common waveguide has a hollow tubular structure, and has the problems of poor input standing wave and cross polarization interference.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior art, the present application provides a KU wave dual polarization waveguide.
The KU wave dual-polarization waveguide comprises a waveguide tube with a hollow structure, wherein the top end of the waveguide tube is connected with a waveguide port, the bottom end of the waveguide tube is sealed, and the waveguide further comprises a straight needle and an L-shaped needle which extend into the waveguide tube through an opening; the waveguide tube comprises a waveguide tube, wherein the main body of the inner wall of the waveguide tube is of a tubular structure, the inner bottom end of the waveguide tube is a waist drum-shaped plane, and the waist drum-shaped plane comprises 2 parallel straight edges and 2 symmetrically arranged circular arcs; a first step part, a second step part and a third step part which are symmetrically distributed are sequentially arranged at the straight edge along the height direction; the straight needle is close to the bottom setting of waveguide pipe, the L type needle is kept away from the bottom setting of waveguide pipe.
Further, the straight needle is located in the height coverage range of the second step portion.
Further, the L-shaped needle is located at the intersection of the third step and the tubular structure in height.
Furthermore, the cross sections of the waveguide tubes at the first step part, the second step part and the third step part are all in a waist drum shape, and the cross section areas are sequentially increased.
Further, the first step portion includes a first vertical face and a first step face, the second step portion includes a second vertical face and a second step face, and the third step portion includes a third vertical face and a third step face; the first step surface is parallel to the second step surface.
Further, the L-shaped needle comprises a first part and a second part which are perpendicular to each other, and the second part of the L-shaped needle is perpendicular to the straight needle.
Further, the central line of the straight needle passes through the axis of the waveguide tube, and the length of the straight needle extending into the waveguide tube does not exceed the axis of the waveguide tube; the length of the second part of the L-shaped needle extending into the waveguide is smaller than the radius of the waveguide at the height of the L-shaped needle.
Further, the second part of the L-shaped needle is parallel to a third vertical plane, and the distance between the third vertical plane where the straight needle is located and the second part of the L-shaped needle is less than half of the distance between two third vertical planes symmetrically arranged at the height position of the straight needle.
The utility model discloses following beneficial effect has:
according to the method, the problems of poor standing wave input and cross polarization interference of a common waveguide are solved, and the filtering and inhibiting are increased by changing the structural size of the waveguide on the premise of not changing the caliber of the conventional waveguide and the testing method, so that the phase shifting purpose is achieved.
Drawings
Fig. 1 is a first schematic perspective view of a KU-wave dual-polarized waveguide provided by the present invention;
fig. 2 is a three-dimensional cross-sectional view of a KU wave dual-polarized waveguide provided by the present invention;
fig. 3 is a cross-sectional view of a KU-wave dual-polarized waveguide provided by the present invention along an axis;
fig. 4 is a cross-sectional view of a KU-wave dual-polarized waveguide at a slot-shaped opening according to the present invention;
fig. 5 is a side view of the KU-wave dual-polarized waveguide provided by the present invention along the axis.
Reference numerals:
10-waveguide tube, 11-inner wall body, 12-bottom end, 112-straight edge, 111-circular arc, 13-first step part, 14-second step part, 15-third step part, 131-first vertical surface, 132-first step surface, 141-second vertical surface, 142-second step surface, 151-third vertical surface, 152-third step surface, 101-circular opening, 102-groove-shaped opening, 20-wave guide port, 31-straight needle, 32-L-shaped needle, 321-first part and 322-second part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in fig. 1-5, the utility model discloses a KU wave dual polarization waveguide.
The waveguide includes a waveguide tube 10 having a hollow structure and a waveguide port 20. Wherein, the top end of the waveguide tube 10 is connected with the waveguide port, and the bottom end 12 of the waveguide tube 10 is closed. The waveguide 10 and the waveguide port 20 may be an integrated structure or a split structure.
Functionally differentiated, the waveguide includes a transition feed portion, a transmission portion, and a radiation portion. The waveguide port is a radiation part and is connected with a feed source. The waveguide 10 includes a transition feeding portion and a transmission portion. The transition feeding portion is located at the lower portion of the waveguide 10. The transmission portion is located between the conversion feeding portion and the radiation portion. The transmission part is used for energy transmission.
A probe is provided at the transition feed portion and excites the circular waveguide with the probe, the probe having an outer conductor and an inner conductor, an inner conductor extension portion of the probe being inserted into the transition feed portion. The probe comprises a straight needle 31 and an L-shaped needle 32. The straight needle 31 projects into the waveguide 10 through the circular opening 101, and the L-shaped needle 32 projects into the waveguide 10 through the slot-shaped opening 102. The L-shaped needle 32 includes a first portion and a second portion 322.
According to the method, the problems of poor standing wave input and cross polarization interference of a common waveguide are solved, and the filtering and inhibiting are increased by changing the structural size of the waveguide on the premise of not changing the caliber of the conventional waveguide and the testing method, so that the phase shifting purpose is achieved.
In the exemplary embodiment, the inner wall body 11 of the waveguide 10 is tubular in configuration, having an axis. The bottom end 12 of the waveguide 10 is a waist drum shaped plane structure, and the waist drum shaped plane comprises 2 parallel straight sides 112 and 2 symmetrically arranged circular arcs 111. At the straight edge 112, a first step portion 13, a second step portion 14, and a third step portion 15 are provided in this order in the height direction (the direction in which the axis line is located is the height direction). The number of the first step portions 13, the second step portions 14, and the third step portions 15 is two, and the first step portions, the second step portions, and the third step portions are symmetrically distributed with respect to the axis.
In the present embodiment, the waveguide 10 may be divided into a plurality of regions in the height direction according to the cross-sectional shape of the waveguide 10. The area range corresponding to the first step portion 13 is a first height area. The area range corresponding to the second step portion 14 is a second height area. The area range corresponding to the third step portion 15 is a third height area. The cross-sectional shape of the waveguide 10 in the first height region, the second height region, and the third height region is a waist drum-shaped section. Cross-sectional area at the first step 13 < cross-sectional area at the second step 14 < cross-sectional area at the third step 15. The cross-sectional area of the waveguide 10 is larger at a position near the waveguide port 20, and is circular in shape.
In the waveguide structure of the embodiment, the internal conversion feeding part is of a waist drum-shaped structure, so that the TE11 mode can be transmitted to the maximum extent, the excellent part of the circular waveguide is reserved, the electromagnetic wave power is increased, the unnecessary high-order mode TM01 is cut off, and the processing difficulty can be reduced.
In conventional waveguides, it is common to place an L-shaped needle near the bottom end of the waveguide, and a straight needle away from the bottom end of the waveguide. The L-shaped needle is inserted into the waveguide to form a small radiation antenna, and radiates electromagnetic waves to the waveguide to excite the electromagnetic waves in a TE mode in the waveguide. In order to better convert the TE mode in the waveguide into the TEM mode of the probe, achieve the purpose of expanding the bandwidth and improving the power capacity, and reduce the return loss and insertion loss, the insertion depth of the probe and the placement position of the probe are generally adjusted to adjust the electric field components of the electromagnetic wave and the waveguide, and simultaneously, the step impedance change is applied in a matching manner. Because the area of the cross section of the waveguide close to the bottom end of the waveguide is slightly smaller, the L-shaped needle is arranged close to the bottom end of the waveguide, and the adjustment range of the insertion depth and the needle length is greatly limited.
Unlike the prior art, in the present embodiment, the straight needle is disposed near the bottom end of the waveguide, and the L-shaped needle is disposed far from the bottom end of the waveguide.
The design is improved on the basis of the common waveguide, and the problems of poor standing wave input of the common waveguide and cross polarization interference are improved according to the market demands of customers. In the embodiment, no isolating rod in the traditional design is arranged at the switching feed part, and the filtering and the inhibiting can be increased by changing the structural size of the waveguide on the condition of not changing the caliber of the existing waveguide and the testing method, so that the phase shifting purpose is achieved; the design has more stable isolation effect, does not have the deflection problem caused by processing the isolation rod by the common waveguide, and saves the labor and material cost; the scheme is simple and feasible, and has good processability and stability. The waveguide structure of the embodiment can effectively improve standing waves and cross polarization phenomena through simulation comparison data.
In the present embodiment, the first step portion 13 includes a first vertical surface 131 and a first step surface 132, the second step portion 14 includes a second vertical surface 141 and a second step surface 142, and the third step portion 15 includes a third vertical surface 151 and a third step surface 152. The first step surface 132 and the second step surface 142 are parallel to each other, and may or may not be parallel to the waist drum-shaped plane at the bottom of the waveguide. It should be noted that the first vertical surface 131, the second vertical surface 141, and the third vertical surface 151 are not perpendicular to the waist drum-shaped plane of the bottom end 12. In fact, since the waveguide 10 is deep, a demolding process needs to be considered during manufacturing, and therefore, a certain demolding angle is designed for the waveguide inner wall body 11, the first vertical surface 131, the second vertical surface 141, and the third vertical surface 151.
In order to further improve the matching performance of the circular waveguide converter, the insertion depth of the probe and the position of the probe in the waveguide are adjusted.
In this embodiment, the straight needle 31 and the L-shaped needle 32 are perpendicular and have a phase difference of 90 degrees. Probes 90 degrees out of phase are used to receive vertical and horizontal radio frequency signals.
The first portion of the L-shaped needle 32 is parallel to the straight needle 31 and the second portion 322 of the L-shaped needle 32 is perpendicular to the straight needle 31. Preferably, a straight needle is located at the height coverage of the second step portion, the straight needle protruding from the second vertical face 141 into the interior of the waveguide. The extension part of the central line of the straight needle passes through the axis of the waveguide tube, and the length of the straight needle extending into the waveguide tube does not exceed the axis of the waveguide tube.
Preferably, the L-shaped needle is located elevationally at the intersection of the third step and the tubular structure. As shown in fig. 3 and 4, the length L1 of the second portion of the L-shaped pin extending into the waveguide is less than the radius of the waveguide at the height of the L-shaped pin. The L-shaped needle second portion 322 is parallel to the third vertical face 151. The second portion 322 of an L-shaped pin, which is typically adapted to an optimum size, is positioned beyond the axis of the waveguide, as shown in fig. 3. The area of the cross section of the waveguide far away from the bottom end of the waveguide is slightly larger, so that the adjustment of the insertion depth and the length of the L-shaped needle is facilitated. And the central line of the straight needle passes through the axis of the waveguide tube, and the influence of the position far away from or close to the bottom end of the waveguide tube is not obvious. Let L2 be the distance between the third vertical plane 151 in the direction of the straight needle 31 and the L-shaped needle second part 322, and L3 be the distance between the two third vertical planes 151 symmetrically disposed at the height position of the straight needle 31. Then, L2> (L3/2).
The waveguide port 20 has a receiving cavity whose inner wall is formed in a bell mouth shape close to the waveguide 10.
The utility model discloses following beneficial effect has:
according to the method, the problems of poor standing wave input and cross polarization interference of a common waveguide are solved, and the filtering and inhibiting are increased by changing the structural size of the waveguide on the premise of not changing the caliber of the conventional waveguide and the testing method, so that the phase shifting purpose is achieved.
It will be understood that modifications and variations can be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (8)
1. A KU wave dual-polarization waveguide comprises a waveguide tube with a hollow structure, wherein the top end of the waveguide tube is connected with a waveguide port, the bottom end of the waveguide tube is closed, and the waveguide further comprises a straight needle and an L-shaped needle which extend into the waveguide tube through an opening; it is characterized in that the preparation method is characterized in that,
the waveguide tube comprises a waveguide tube, wherein the main body of the inner wall of the waveguide tube is of a tubular structure, the inner bottom end of the waveguide tube is a waist drum-shaped plane, and the waist drum-shaped plane comprises 2 parallel straight edges and 2 symmetrically arranged circular arcs; a first step part, a second step part and a third step part which are symmetrically distributed are sequentially arranged at the straight edge along the height direction;
the straight needle is close to the bottom setting of waveguide pipe, the L type needle is kept away from the bottom setting of waveguide pipe.
2. The KU wave dual polarized waveguide according to claim 1, wherein the straight pins are located at a height coverage of the second stepped portion.
3. The KU wave dual polarized waveguide according to claim 2, wherein the L-shaped pins are located elevationally at the intersection of the third step portion and the tubular structure.
4. The KU wave dual polarization waveguide of claim 1, wherein the cross-sectional shapes of the waveguide at the first step portion, the second step portion and the third step portion are all waist drum shapes, and the cross-sectional areas are sequentially increased.
5. The KU wave dual polarized waveguide according to claim 1, wherein the first step portion comprises a first vertical face and a first step face, the second step portion comprises a second vertical face and a second step face, and the third step portion comprises a third vertical face and a third step face; the first step surface is parallel to the second step surface.
6. The KU wave dual polarized waveguide of claim 5, wherein the L-shaped pin comprises a first portion and a second portion perpendicular to each other, the second portion of the L-shaped pin being perpendicular to the straight pin.
7. The KU wave dual polarized waveguide of claim 6, wherein the center line of the straight needle passes through the axis of the waveguide tube, and the straight needle extends into the waveguide tube by a length not exceeding the axis of the waveguide tube; the length of the second part of the L-shaped needle extending into the waveguide is smaller than the radius of the waveguide at the height of the L-shaped needle.
8. The KU wave dual polarized waveguide of claim 7, wherein the second portion of the L-shaped pins is parallel to a third vertical plane, and the distance between the third vertical plane where the straight pins are located and the second portion of the L-shaped pins is less than half of the distance between two third vertical planes symmetrically arranged at the height position of the straight pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035697.7U CN211320287U (en) | 2019-11-22 | 2019-11-22 | KU wave dual-polarization waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035697.7U CN211320287U (en) | 2019-11-22 | 2019-11-22 | KU wave dual-polarization waveguide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211320287U true CN211320287U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922035697.7U Expired - Fee Related CN211320287U (en) | 2019-11-22 | 2019-11-22 | KU wave dual-polarization waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211320287U (en) |
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2019
- 2019-11-22 CN CN201922035697.7U patent/CN211320287U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 Termination date: 20211122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |