阅读说明：本技术 一种用于动中通的简易极化*** (Simple polarization tracker for mobile communication ) 是由 宿孟 于 2019-08-27 设计创作，主要内容包括：本发明提供了一种用于动中通的简易极化跟踪器,包括正交模耦合器、极化选择器、步进电机,正交模耦合器由上到下依次包括上波导结构块、中波导结构块、下波导结构块。上波导结构块、中波导结构块、下波导结构块连接形成互相平行的第一通道与第二通道。中波导结构块上且靠近第一矩形波导内腔末端的底面中心设有一个通孔,通孔内设有圆柱形介质块,圆柱形介质块的中心设有第一探针,第一探针为圆柱形金属探针,在靠近第二矩形波导内腔的输入端设有极化扭转结构。极化选择器内设介质转子,介质转子一端设有第二探针,第二探针为Z形圆柱形金属探针。本发明的简易极化跟踪器具有结构简单、加工和组装方便、成本低的特点。(The invention provides a simple polarization tracker for communication in motion, which comprises an orthogonal mode coupler, a polarization selector and a stepping motor, wherein the orthogonal mode coupler sequentially comprises an upper waveguide structure block, a middle waveguide structure block and a lower waveguide structure block from top to bottom. The upper waveguide structure block, the middle waveguide structure block and the lower waveguide structure block are connected to form a first channel and a second channel which are parallel to each other. The center of the bottom surface, close to the tail end of the first rectangular waveguide inner cavity, of the middle waveguide structure block is provided with a through hole, a cylindrical dielectric block is arranged in the through hole, the center of the cylindrical dielectric block is provided with a first probe, the first probe is a cylindrical metal probe, and a polarization torsion structure is arranged at the input end close to the second rectangular waveguide inner cavity. A medium rotor is arranged in the polarization selector, a second probe is arranged at one end of the medium rotor, and the second probe is a Z-shaped cylindrical metal probe. The simple polarization tracker has the characteristics of simple structure, convenience in processing and assembling and low cost.)

1. a simplified polarization tracker for mobile communications, comprising an orthogonal mode coupler (1), characterized in that: the orthogonal mode coupler (1) sequentially comprises an upper waveguide structure block (11), a middle waveguide structure block (12) and a lower waveguide structure block (13) from top to bottom; the upper waveguide structure block (11) is connected with the middle waveguide structure block (12) to form a first channel with an opening at one end, and a first rectangular waveguide inner cavity is arranged in the first channel; the middle waveguide structure block (12) is connected with the lower waveguide structure block (13) to form a second channel with two open ends, a second rectangular waveguide inner cavity and a first rectangular waveguide inner cavity are arranged in the second channel, the second rectangular waveguide inner cavity is communicated with the first rectangular waveguide inner cavity, and the first rectangular waveguide inner cavity is positioned at the tail end of the second rectangular waveguide inner cavity; the front end port of the first channel and the front end port of the second channel have the same cross-sectional dimension, the first channel is parallel to the second channel, and the second rectangular waveguide cavity is positioned right below the first rectangular waveguide cavity;

a through hole is formed in the middle waveguide structure block (12) and in the center of the bottom face close to the tail end of the first rectangular waveguide inner cavity, a cylindrical dielectric block (1205) is arranged in the through hole, the cylindrical dielectric block (1205) is perpendicular to the first channel and the second channel, a first probe is arranged in the center of the cylindrical dielectric block (1205), and the first probe is a cylindrical metal probe (1204); electromagnetic wave signals entering the first rectangular waveguide cavity are coupled and transmitted to the input end of the first rectangular waveguide cavity through the cylindrical dielectric block (1205) and the cylindrical metal probe (1204);

A polarization torsion structure is arranged at the input end close to the second rectangular waveguide cavity, and comprises a first polarization torsion structure positioned on the lower end face of the middle waveguide structure block (12) and a second polarization torsion structure positioned on the upper end face of the lower waveguide structure block (13); the first polarization torsion structure comprises a first polarization torsion groove (1207) and a first polarization torsion protrusion (1208) which are arranged in parallel, the second polarization torsion structure comprises a second polarization torsion groove (132) and a second polarization torsion protrusion (133) which are arranged in parallel, and the first polarization torsion structure and the second polarization torsion structure are in 180-degree rotational symmetry along the central line of the connecting surface of the middle waveguide structure block (12) and the lower waveguide structure block (13); the polarization torsion structure is used for rotating the polarization of the electromagnetic wave input into the second rectangular waveguide cavity by 90 degrees and then inputting the electromagnetic wave into the input end of the first rectangular waveguide cavity;

The polarization selector (2) comprises a square-circle transition (21) and a T-shaped base (25), wherein 1 input channel is arranged in the square-circle transition (21), the input channel is connected with the output end of the first square waveguide inner cavity, an output channel is arranged in the T-shaped base (25), and the input channel and the first square waveguide inner cavity are perpendicular to the output channel;

a medium rotor (23) is further arranged in the polarization selector (2), a second probe is arranged at one end of the medium rotor (23), and the second probe is a Z-shaped cylindrical metal probe (22);

The other end of the second probe is positioned in a circular waveguide cavity of the input channel, and the central lines of the medium rotor (23) and the second probe are superposed with the central line of the circular waveguide cavity; the other end of the medium rotor (23) is connected with a stepping motor (3), and the stepping motor (3) drives the medium rotor (23) to rotate so that the second probe rotates by 360 degrees.

2. the simplified polarization tracker for mobile phone communication according to claim 1, wherein: the first rectangular waveguide inner cavity comprises a first rectangular waveguide groove (112) and a second rectangular waveguide groove (1202), the first rectangular waveguide groove (112) is formed in the lower end face of the upper waveguide structure block (11), and the second rectangular waveguide groove (1202) is formed in the upper end face of the middle waveguide structure block (12);

The second rectangular waveguide inner cavity comprises a third rectangular waveguide groove (1206), the first polarization torsion structure, a fourth rectangular waveguide groove (131) and the second polarization torsion structure, and the third rectangular waveguide groove (1206) and the fourth rectangular waveguide groove (131) are in mirror symmetry along the connecting surface of the middle waveguide structure block (12) and the lower waveguide structure block (13);

the square waveguide inner cavity comprises a fifth rectangular waveguide groove (1211) and a sixth rectangular waveguide groove (137), and the height of the fifth rectangular waveguide groove (1211) and the height of the sixth rectangular waveguide groove (137) are half of the width; the fifth rectangular waveguide groove (1211) is formed in the lower end face of the middle waveguide structure block (12), the sixth rectangular waveguide groove (137) is formed in the upper end face of the lower waveguide structure block (13), and the fifth rectangular waveguide groove (1211) and the sixth rectangular waveguide groove (137) are in mirror symmetry along the connecting face of the middle waveguide structure block (12) and the lower waveguide structure block (13).

3. the simplified polarization tracker for mobile phone communication according to claim 2, wherein: rectangular matching steps are further arranged in the first rectangular waveguide inner cavity and the second rectangular waveguide inner cavity;

The rectangular matching steps in the first rectangular waveguide inner cavity comprise a first rectangular matching step (111) located on the lower end face of the upper waveguide structure block (11) and a second rectangular matching step (1201) located on the upper end face of the middle waveguide structure block (12); the lowest step surfaces of the first rectangular matching step (111) and the second rectangular matching step (1201) are positioned at the front end of the first rectangular waveguide inner cavity, and the highest step surface of the first rectangular matching step (111) is connected with the first rectangular waveguide groove (112) and is positioned in the same horizontal plane; the highest step surface of the second rectangular matching step (1201) is connected with the second rectangular waveguide groove (1202) and is positioned in the same horizontal plane, and the first rectangular matching step (111) is identical to the second rectangular matching step (1201);

The rectangular matching steps in the first rectangular waveguide inner cavity comprise a third rectangular matching step (1209) located on the lower end face of the middle waveguide structure block (12) and a fourth rectangular matching step (134) located on the upper end face of the lower waveguide structure block (13); the lowest step surface of the third rectangular matching step (1209) is coplanar with the first polarization torsion groove (1207), the highest step surface of the third rectangular matching step (1209) is connected with the fifth rectangular waveguide groove (1211) and is located in the same horizontal plane, the lowest step surface of the fourth rectangular matching step (134) is coplanar with the second polarization torsion groove (132), the highest step surface of the fourth rectangular matching step (134) is connected with the sixth rectangular waveguide groove (137) and is located in the same horizontal plane, and the third rectangular matching step (1209) and the fourth rectangular matching step (134) are mirror-symmetrical along the connecting surface of the middle waveguide structure block (12) and the lower waveguide structure block (13).

4. The simplified polarization tracker for mobile phone communication according to claim 3, wherein: the rectangular matching steps are three-stage steps.

5. The simplified polarization tracker for mobile phone communication according to claim 2, wherein: transition matching steps are further arranged at the tail end of the second rectangular waveguide inner cavity and comprise a first transition matching step (1210) located on the lower end face of the middle waveguide structure block (12) and a second transition matching step (135) located on the upper end face of the lower waveguide structure block (13); the first transition matching step (1210) and the second transition matching step (135) are in mirror symmetry along the connecting surface of the middle waveguide structure block (12) and the lower waveguide structure block (13);

The transition matching step (1210) and the second transition matching step (135) are located on two side walls of the second rectangular waveguide inner cavity, the lowest step surface of the transition matching step (1210) and the second transition matching step (135) is coplanar with the side wall of the first rectangular waveguide inner cavity, and the highest step surface of the transition matching step (1210) and the second transition matching step (135) is coplanar with the side wall of the second rectangular waveguide inner cavity.

6. The simplified polarization tracker for mobile communication according to claim 3 or 5, wherein: a first adjusting screw (1203) is arranged on the middle waveguide structure block (12) and is positioned at the center of the tail end of the first rectangular waveguide inner cavity, and the first adjusting screw (1203) is parallel to the first rectangular waveguide inner cavity;

and a second adjusting screw (136) is arranged on the lower waveguide structure block (13) and positioned at the bottom surface of the tail end of the second rectangular waveguide inner cavity, and the second adjusting screw (136) is vertical to the second rectangular waveguide inner cavity.

7. The simplified polarization tracker for mobile phone communication according to claim 1, wherein: the cylindrical metal probe (1204) comprises a first metal cylinder and a second metal cylinder which are coaxially arranged, the diameter of the first metal cylinder is larger than that of the second metal cylinder, the first metal cylinder is located in the first rectangular waveguide cavity, and the second metal cylinder is located in the second rectangular waveguide cavity.

8. The simplified polarization tracker for mobile phone communication according to claim 1, wherein: the Z-shaped cylindrical metal probe (22) comprises a first straight line section (221), a second straight line section (222) and a third straight line section (223) which are sequentially connected, wherein the diameters of the first straight line section (221), the second straight line section (222) and the third straight line section (223) are the same and are positioned in the same horizontal plane;

an included angle between the first straight line segment (221) and the second straight line segment (222) is an obtuse angle, and an included angle between the second straight line segment (222) and the third straight line segment (223) is an acute angle.

9. The simplified polarization tracker for mobile phone communication according to claim 8, wherein: fillet transitions are arranged between the first straight line segment (221) and the second straight line segment (222) and between the second straight line segment (222) and the third straight line segment (223).

Technical Field

the invention relates to the technical field of satellite communication, in particular to a simple polarization tracker for communication in motion.

Background

The communication in motion is short for a mobile satellite ground station communication system, and specific objects of the communication in motion comprise mobile carriers such as vehicles, ships, airplanes and the like. The satellite platform can be tracked in real time in the moving process of the mobile carrier, and multimedia information including images, sounds and the like can be transmitted without interruption. At present, most Ku and C frequency band satellites adopt a linear polarization mode, and in the process of moving a mobile carrier relative to a synchronous satellite, on one hand, the maximum gain direction of an antenna is required to be always aligned with the satellite, and on the other hand, the linear polarization direction of a communication-in-motion antenna is required to be dynamically adjusted, so that the matching with the polarization direction of the satellite antenna is ensured.

The main mode of changing the polarization angle of the high-profile circular-caliber reflector antenna is to directly rotate a linear polarization feed source. The low-profile flat array antenna cannot use the same polarization adjustment method as a reflector antenna, and the communication-in-motion flat array antenna can only change the polarization direction of the antenna by a polarization tracker. Low profile flat panel array antennas are now more widely used and polarization trackers are a key component.

The polarization tracker is divided into an active type and a passive type, the principle of the active polarization tracker is simple, the tracking time is short, but the active polarization tracker can only be used at the receiving end of an antenna generally due to low power capacity. The passive polarization tracker can be used for both a receiving end and a transmitting end, and has gradually replaced an active linear polarization tracker to become the mainstream due to the characteristics of low loss, high power capacity, testability and the like.

The standing wave of the existing passive polarization tracker is usually less than 1.25, the output two arms are required to be parallel and consistent in phase, and the isolation degree of the two arms is below-36 dB. Although the passive polarization tracker can meet the use requirements of most communication-in-motion systems, the passive polarization tracker still has the defects of complex structure and difficult processing of part of key parts.

for example, chinese patent CN 105098360 a discloses a novel polarization tracker, which includes an orthogonal mode coupler, a signal input or output header, a rotating rotor, a dielectric screw sleeve and a motor. The novel polarization tracker has the following problems and disadvantages: 1. the communication between the upper straight arm waveguide and the lower straight arm waveguide of the orthogonal mode coupler needs to depend on the combined action of a plurality of waveguide matching blocks and coupling needles penetrating through two side walls of a waveguide cavity, the structure is complex, and the isolation degree of the two arms is not facilitated; 2. the U-shaped probe is formed after being bent for three times, and the bent probe needs to meet high processing precision, so that the cost and the manufacturing difficulty of a die are increased, and the qualification rate of the probe is influenced.

For example, chinese patent CN 106450759 a discloses a compact linear polarization tracker, which includes an equal-phase orthogonal mode coupler, a stepping motor driving assembly, a rotary orthogonal mode coupler, and an L-shaped waveguide rotary joint. The polarization tracker has the following problems and disadvantages: 1. the polarization tracker has a plurality of gear and bearing structures, and has the advantages of more parts, complex structure, complex assembly process and higher cost; 2. the output two arms of the polarization tracker are in different directions; 3. the stepping motor drives the L-shaped waveguide rotary joint to drive the rotary orthogonal mode coupler to rotate, seamless tracking of linear polarization signals is achieved, and the number of parts which move relatively in working is large, so that abrasion among parts is easy to cause after the polarization tracker works for a long time, and the conduction and tracking effects of electromagnetic signals are affected.

In view of the above, there is a need for an improved polarization tracker in the prior art to solve the above problems.

Disclosure of Invention

the invention aims to provide a simple polarization tracker for communication in motion, which is mainly applied to a Ku frequency band satellite communication in motion antenna. In the aspect of electrical property, the standing-wave ratio, phase consistency, isolation and other properties are good; in the aspect of structure, the polarization tracker has simple structure and easy processing, and electromagnetic signals of the two rectangular waveguide inner cavities are output in the same direction in parallel. Meanwhile, through geometric scaling, the simple polarization tracker can also be applied to satellite communication antenna in other frequency bands.

The technical scheme for realizing the purpose of the invention is as follows: a simple polarization tracker for communication in motion comprises an orthogonal mode coupler, wherein the orthogonal mode coupler sequentially comprises an upper waveguide structure block, a middle waveguide structure block and a lower waveguide structure block from top to bottom. The upper waveguide structure block, the middle waveguide structure block and the lower waveguide structure block are connected through bolts to form a whole, so that the structure of the orthogonal mode coupler is simple. The upper waveguide structure block and the middle waveguide structure block are connected to form a first channel with one open end, and a first rectangular waveguide inner cavity is arranged in the first channel. The middle waveguide structure block and the lower waveguide structure block are connected to form a second channel with two open ends, a second rectangular waveguide inner cavity and a first square waveguide inner cavity are arranged in the second channel, the second rectangular waveguide inner cavity is communicated with the first square waveguide inner cavity, and the first square waveguide inner cavity is located at the tail end of the second rectangular waveguide inner cavity. The front end port of the first channel and the front end port of the second channel are the same in cross-sectional size, the first channel is parallel to the second channel, and the second rectangular waveguide inner cavity is located right below the first rectangular waveguide inner cavity. The first channel is parallel to the second channel, so that electromagnetic wave signals entering the first rectangular waveguide cavity through the first channel and entering the second rectangular waveguide cavity through the second channel can be kept parallel.

In order to facilitate the communication of the first channel and the second channel, electromagnetic wave signals in the first rectangular waveguide inner cavity are transmitted to the first rectangular waveguide inner cavity in a coupling mode, a through hole is formed in the middle waveguide structure block and is close to the center of the bottom face of the tail end of the first rectangular waveguide inner cavity, a cylindrical dielectric block is arranged in the through hole, the cylindrical dielectric block is perpendicular to the first channel and the second channel, a first probe is arranged at the center of the cylindrical dielectric block, and the first probe is a cylindrical metal probe. And the electromagnetic wave signal entering the first rectangular waveguide cavity is coupled and transmitted to the input end of the first rectangular waveguide cavity through the cylindrical dielectric block and the cylindrical metal probe.

And a polarization torsion structure is arranged at the input end close to the second rectangular waveguide cavity, and comprises a first polarization torsion structure positioned on the lower end surface of the middle waveguide structure block and a second polarization torsion structure positioned on the upper end surface of the lower waveguide structure block. The first polarization torsion structure comprises a first polarization torsion groove and a first polarization torsion protrusion which are arranged in parallel, the second polarization torsion structure comprises a second polarization torsion groove and a second polarization torsion protrusion which are arranged in parallel, and the first polarization torsion structure and the second polarization torsion structure are in 180-degree rotational symmetry along the central line of the connecting surface of the middle waveguide structure block and the lower waveguide structure block. The polarization torsion structure is used for polarizing and rotating the electromagnetic wave signal input into the second rectangular waveguide cavity by 90 degrees and then inputting the electromagnetic wave signal into the input end of the first rectangular waveguide cavity.

In order to mix and output electromagnetic wave signals input into the first rectangular waveguide cavity and the second rectangular waveguide cavity of the first rectangular waveguide cavity, the simple polarization tracker further comprises a polarization selector, and the polarization selector comprises a square-circle transition and a T-shaped base. The square-circle transition is internally provided with 1 input channel, the input channel is connected with the output end of the first square waveguide inner cavity, the T-shaped base is internally provided with an output channel, and the input channel and the first square waveguide inner cavity are vertical to the output channel.

A medium rotor is further arranged in the polarization selector, a second probe is arranged at one end of the medium rotor, and the second probe is a Z-shaped cylindrical metal probe. The other end of the second probe is positioned in the circular waveguide cavity of the input channel, and the central lines of the medium rotor and the second probe are superposed with the central line of the circular waveguide cavity. The other end of the medium rotor is connected with a stepping motor, and the stepping motor drives the medium rotor to rotate so that the second probe rotates by 360 degrees. The medium rotor and the second probe rotate, when the coupled energy is maximum, the state matched with the satellite antenna is corresponded, and on the basis, the polarization tracking function of the receiving end can be completed through a matched servo feedback system.

wherein the first rectangular waveguide cavity comprises a first rectangular waveguide groove and a second rectangular waveguide groove,

The first rectangular waveguide groove is arranged on the lower end face of the upper waveguide structure block, and the second rectangular waveguide groove is arranged on the upper end face of the middle waveguide structure block.

The second rectangular waveguide inner cavity comprises a third rectangular waveguide groove, a first polarization torsion structure, a fourth rectangular waveguide groove and a second polarization torsion structure, and the third rectangular waveguide groove and the fourth rectangular waveguide groove are in mirror symmetry along the connecting surface of the middle waveguide structure block and the lower waveguide structure block.

the square waveguide inner cavity comprises a fifth rectangular waveguide groove and a sixth rectangular waveguide groove, and the height of the fifth rectangular waveguide groove and the height of the sixth rectangular waveguide groove are half of the width of the square waveguide inner cavity. The fifth rectangular waveguide groove is formed in the lower end face of the middle waveguide structure block, the sixth rectangular waveguide groove is formed in the upper end face of the lower waveguide structure block, and the fifth rectangular waveguide groove and the sixth rectangular waveguide groove are in mirror symmetry along the connecting face of the middle waveguide structure block and the lower waveguide structure block.

furthermore, the rectangular matching steps are further arranged in the first rectangular waveguide inner cavity and the second rectangular waveguide inner cavity, and the height of the waveguide is raised to avoid the first polarization torsion groove in the middle waveguide structure block under the condition that transmission matching is not influenced, so that an upper channel and a lower channel are prevented from being punched in machining. And a rectangular matching step is arranged in the second rectangular waveguide cavity, so that the size required by gradual transition from the second rectangular waveguide cavity to the first rectangular waveguide cavity is facilitated.

the rectangular matching step in the first rectangular waveguide inner cavity comprises a first rectangular matching step positioned on the lower end face of the upper waveguide structure block and a second rectangular matching step positioned on the upper end face of the middle waveguide structure block. The lowest step surface of the first rectangular matching step and the second rectangular matching step is positioned at the front end of the first rectangular waveguide inner cavity, and the highest step surface of the first rectangular matching step is connected with the first rectangular waveguide groove and is positioned in the same horizontal plane. The highest step surface of the second rectangular matching step is connected with the second rectangular waveguide groove and is positioned in the same horizontal plane, and the first rectangular matching step and the second rectangular matching step are in mirror symmetry along the central line of the input end of the first channel.

the rectangular matching step position in the first rectangular waveguide inner cavity comprises a third rectangular matching step positioned on the lower end face of the middle waveguide structure block and a fourth rectangular matching step positioned on the upper end face of the lower waveguide structure block. The lowest step surface of the third rectangular matching step is coplanar with the first polarization torsion groove, and the highest step surface of the third rectangular matching step is connected with the fifth rectangular waveguide groove and is positioned in the same horizontal plane. The lowest step surface of the fourth rectangular matching step is coplanar with the second polarization torsion groove, and the highest step surface of the fourth rectangular matching step is connected with the sixth rectangular waveguide groove and is positioned in the same horizontal plane. The third rectangular matching step and the fourth rectangular matching step are in mirror symmetry along the connecting surface of the middle waveguide structure block and the lower waveguide structure block.

Preferably, as the step number of the rectangular matching steps increases, the impedance transformation is slow, and the matching bandwidth is wider. However, an excessive number of stages significantly increases the length of the orthogonal mode coupler, and thus the rectangular matching step is set to be a three-stage step.

Furthermore, the tail end of the second rectangular waveguide inner cavity is also provided with a transition matching step, and the transition matching step comprises a first transition matching step positioned on the lower end face of the middle waveguide structure block and a second transition matching step positioned on the upper end face of the lower waveguide structure block. The first transition matching step and the second transition matching step are in mirror symmetry along the connecting surface of the middle waveguide structure block and the lower waveguide structure block. The arrangement of the transition matching step can gradually transition the space between the two side walls to the size required by the square waveguide inner cavity, and through reasonable design, the impedance of the frequency band is enabled to realize transition matching, and reflection is reduced.

The transition matching step and the second transition matching step are positioned on two side walls of the second rectangular waveguide inner cavity, the lowest step surfaces of the transition matching step and the second transition matching step are coplanar with the side wall of the first rectangular waveguide inner cavity, and the highest step surfaces of the transition matching step and the second transition matching step are coplanar with the side wall of the second rectangular waveguide inner cavity.

As a further improvement of the present invention, in order to facilitate proper adjustment of the connection impedance between the first channel and the second channel, a first adjusting screw is disposed on the middle waveguide structure block and at the center of the end of the first rectangular waveguide cavity, and the first adjusting screw is parallel to the first rectangular waveguide cavity. And a second adjusting screw is arranged on the lower waveguide structure block and positioned at the bottom surface of the tail end of the second rectangular waveguide inner cavity, and the second adjusting screw is vertical to the second rectangular waveguide inner cavity. The arrangement of the first adjusting screw and the second adjusting screw can reduce the precision and cost required by the processing of the orthogonal mode coupler.

After the cylindrical metal probe is inserted, the distance between the cylindrical metal probe and the bottom surface of the inner cavity of the second rectangular waveguide needs to be strictly controlled, the electromagnetic matching is greatly affected, and in order to avoid repeated debugging on the insertion depth of the cylindrical metal probe, the cylindrical metal probe is designed into a structure with a large top and a small bottom. Namely, the cylindrical metal probe comprises a first metal cylinder and a second metal cylinder which are coaxially arranged, the diameter of the first metal cylinder is larger than that of the second metal cylinder, the first metal cylinder is located in the first rectangular waveguide cavity, the second metal cylinder is located in the second rectangular waveguide cavity, and during installation, the common plane of the first metal cylinder and the second metal cylinder is coplanar with the bottom of the second rectangular waveguide groove.

The second probe is a Z-shaped cylindrical metal probe, and the Z-shaped cylindrical metal probe comprises a first straight line section, a second straight line section and a third straight line section which are sequentially connected. The first straight line section, the second straight line section and the third straight line section have the same diameter and are positioned in the same horizontal plane. The included angle between the first straight line section and the second straight line section is an obtuse angle, and the included angle between the second straight line section and the third straight line section is an acute angle. The arrangement of the Z-shaped cylindrical metal probe can reduce the bending times of probe processing, reduce the difficulty of probe processing and improve the qualification rate of the probe.

further, fillet transitions are arranged between the first straight line section and the second straight line section, and between the second straight line section and the third straight line section.

compared with the prior art, the beneficial effects of the invention are as follows:

1. the first channel and the second channel of the orthogonal mode coupler are communicated only through the cylindrical dielectric block and the cylindrical metal probe, the structure is simple, and machining and assembling are facilitated. On the basis, the electromagnetic wave signal input ports of the first channel and the second channel are parallel and in the same direction, so that the first channel and the second channel are conveniently and directly connected with the duplexer, and the distance between the electromagnetic wave signal input ports of the first channel and the second channel is short, so that the overall layout of the orthogonal mode coupler is more compact.

2. The arrangement of the first adjusting screw and the second adjusting screw can properly adjust the connection impedance between the first channel and the second channel, the mismatching caused by machining errors is corrected, and the machining precision and cost are reduced.

3. The simple polarization tracker has the performance of bandwidth, insertion loss and the like which are not lower than those of products in the prior art background, and the performance of standing-wave ratio and port isolation are superior to those of the prior products.

4. The medium rotor can rotate 360 degrees in the T-shaped base, and the medium rotor is directly connected with the stepping motor through the key slot, so that any gear transmission structure is not needed, the transmission precision is high, the cost is low, and seamless tracking of the satellite polarization direction can be realized.

5. According to the second probe, the traditional U-shaped probe is replaced by the Z-shaped cylindrical metal probe, the bending times of the second probe are changed from 3 to 2, the processing difficulty of the second probe is reduced, and the qualification rate of the probe is improved.

drawings

FIG. 1 is a schematic diagram of a simple polarization tracker according to the present invention;

FIG. 2 is an exploded view of an orthomode coupler of the simple polarization tracker of the present invention;

FIG. 3 is a schematic view of the lower end face of the upper waveguide structure block of the orthomode coupler of the present invention;

FIG. 4 is a schematic top view of a mid-waveguide structure block of an orthomode coupler of the present invention;

FIG. 5 is a schematic view of the lower end surface of the middle waveguide structure block of the orthomode coupler of the present invention;

FIG. 6 is a schematic top view of a lower waveguide building block of an orthomode coupler of the present invention;

FIG. 7 is a schematic diagram of the position of a second adjustment screw in the quadrature mode coupler of the present invention;

FIG. 8 is a schematic diagram of a cylindrical dielectric block and a first probe of an orthogonal mode coupler according to the present invention;

FIG. 9 is a perspective view of a polarization selector of the simple polarization tracker of the present invention;

FIG. 10 is a cross-sectional view of a polarization selector of the simple polarization tracker of the present invention;

FIG. 11 is a schematic diagram of a square-to-circle transition of a polarization selector according to the present invention;

FIG. 12 is a schematic view of a T-shaped base on the side of the polarization selector near the stepper motor in the present invention;

FIG. 13 is a schematic view of a T-shaped pedestal near the square to round transition side of the polarization selector of the present invention;

FIG. 14 is a schematic diagram of the construction of the dielectric rotor of the polarization selector of the present invention;

FIG. 15 is a schematic diagram of a second probe of the polarization selector of the present invention;

FIG. 16 is a schematic view of a stepping motor according to the present invention;

Fig. 17 is a simulation result of the standing-wave ratio of the common port when the included angle between the second probe and the wide surface of the first channel is 180 ° in embodiment 1 of the present invention;

fig. 18 is a simulation result of the standing-wave ratio of the common port when the included angle between the second probe and the wide surface of the first channel is 90 ° in embodiment 1 of the present invention;

Fig. 19 is a simulation result of the standing-wave ratio of the common port when the included angle between the second probe and the wide surface of the first channel is 45 ° in example 1 of the present invention;

Fig. 20 shows the insertion loss of the first channel and the isolation of the first channel from the second channel in embodiment 1 of the present invention;

Fig. 21 shows the insertion loss of the second channel and the isolation of the second channel from the first channel in embodiment 1 of the present invention;

fig. 22 shows the phase difference between the first channel and the second channel in embodiment 1 of the present invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

in the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.