CN110581364A - Simple polarization tracker for mobile communication - Google Patents
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- 230000010287 polarization Effects 0.000 title claims abstract description 160
- 238000010295 mobile communication Methods 0.000 title claims description 5
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- 239000002184 metal Substances 0.000 claims abstract description 63
- 238000004891 communication Methods 0.000 claims abstract description 20
- 230000007704 transition Effects 0.000 claims description 55
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 9
- 238000002955 isolation Methods 0.000 description 9
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
Abstract
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.
Description
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.
Example 1:
As shown in fig. 1, the present embodiment provides a simple polarization tracker for mobile communication, which includes an orthogonal mode coupler 1, a polarization selector 2, and a stepping motor 3.
As shown in fig. 2, the orthogonal mode coupler 1 includes an upper waveguide structure block 11, a middle waveguide structure block 12, and a lower waveguide structure block 13 in this order from top to bottom. The upper waveguide structure block 11, the middle waveguide structure block 12 and the lower waveguide structure block 13 are connected by bolts to form a whole, and a three-port network is formed. The upper waveguide structure block 11 and the middle waveguide structure block 12 are connected to form a first channel with an opening at one end, the first channel is provided with an electromagnetic wave signal input port A, and a first rectangular waveguide inner cavity is arranged in the first channel. The middle waveguide structure block 12 and the lower waveguide structure block 13 are connected to form a second channel with two open ends, a second rectangular waveguide cavity and a first square waveguide cavity are arranged in the second channel, the second rectangular waveguide cavity is communicated with the first square waveguide cavity, the first square waveguide cavity is located at the tail end of the second rectangular waveguide cavity, an electromagnetic wave signal input port B is arranged at the front end of the second rectangular waveguide cavity, and an electromagnetic wave signal first output port C is arranged at the tail end of the first square waveguide cavity. The first channel is parallel to the second channel, and the second rectangular waveguide cavity is located right below the first rectangular waveguide cavity. The front end port of the first channel has the same cross-sectional dimensions as the front end port of the second channel (i.e., the cross-sectional dimensions of electromagnetic wave signal input port a are the same as those of electromagnetic wave signal input port B). The first channel is parallel to the second channel, so that the electromagnetic wave signal a1 entering the first rectangular waveguide cavity through the first channel and the electromagnetic wave signal b1 entering the second rectangular waveguide cavity through the second channel can be kept parallel.
As shown in fig. 3 and 4, the first rectangular waveguide cavity includes a first rectangular waveguide groove 112 and a second rectangular waveguide groove 1202, the first rectangular waveguide groove 112 is disposed on the lower end surface of the upper waveguide structure block 11, and the second rectangular waveguide groove 1202 is disposed on the upper end surface of the middle waveguide structure block 12.
As shown in fig. 5 and 6, the second rectangular waveguide cavity includes a third rectangular waveguide groove 1206, a first polarization torsion structure, a fourth rectangular waveguide groove 131, and a second polarization torsion structure. The third rectangular waveguide groove 1206 and the fourth rectangular waveguide groove 131 are mirror-symmetrical along the connecting surface of the middle waveguide structure block 12 and the lower waveguide structure block 13.
As shown in fig. 5 and 6, the square waveguide cavity includes 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. A fifth rectangular waveguide groove 1211 is provided on the lower end surface of the middle waveguide structure block 12, a sixth rectangular waveguide groove 137 is provided on the upper end surface of the lower waveguide structure block 13, and the fifth rectangular waveguide groove 1211 and the sixth rectangular waveguide groove 137 are mirror-symmetric along the connection surface of the middle waveguide structure block 12 and the lower waveguide structure block 13.
rectangular matching steps are further arranged in the first rectangular waveguide inner cavity and the second rectangular waveguide inner cavity. As shown in fig. 3 and 4, the rectangular matching steps in the first rectangular waveguide cavity include a first rectangular matching step 111 located on the lower end surface of the upper waveguide structure block 11 and a second rectangular matching step 1201 located on the upper end surface 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 located in the same horizontal plane, and the first rectangular matching step 111 is identical to the second rectangular matching step 1201.
As shown in fig. 5 and 6, the rectangular matching steps in the first rectangular waveguide cavity include a third rectangular matching step 1209 located on the lower end surface of the middle waveguide structure block 12 and a fourth rectangular matching step 134 located on the upper end surface of the lower waveguide structure block 13. The lowest step surface of the third rectangular matching step 1209 is coplanar with the first polarization twist groove 1207, and the highest step surface of the third rectangular matching step 1209 is connected to the fifth rectangular waveguide groove 1211 and located in the same horizontal plane. The lowest step surface of the fourth rectangular matching step 134 is coplanar with the second polarization twist groove 132, and 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. The third rectangular matching step 1209 and the fourth rectangular matching step 134 are mirror-symmetrical along the connection surface of the middle waveguide structure block 12 and the lower waveguide structure block 13.
as shown in fig. 5 and 6, transition matching steps are further provided at the end of the second rectangular waveguide cavity, including a first transition matching step 1210 located on the lower end surface of the middle waveguide structure block 12 and a second transition matching step 135 located on the upper end surface of the lower waveguide structure block 13. The first transition matching step 1210 and the second transition matching step 135 are mirror symmetric along the connection 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 surfaces of the transition matching step 1210 and the second transition matching step 135 are coplanar with the side wall of the first rectangular waveguide inner cavity, and the highest step surfaces of the transition matching step 1210 and the second transition matching step 135 are coplanar with the side wall of the second rectangular waveguide inner cavity.
The rectangular matching step and the transition matching step are preferably three-level steps, and the width and the height of each level of the rectangular matching step can be the same or different.
As shown in fig. 4, in order to facilitate proper adjustment of the connection impedance between the first channel and the second channel, a first adjusting screw 1203 is disposed on the middle waveguide structure block 12 and at the center of the end of the first rectangular waveguide inner cavity, and the first adjusting screw 1203 is parallel to the first rectangular waveguide inner cavity. As shown in fig. 7, a second adjusting screw 136 is disposed on the lower waveguide structure block 13 and at a bottom surface of the end of the second rectangular waveguide cavity, and the second adjusting screw 136 is perpendicular to the second rectangular waveguide cavity. The first and second adjustment screws 1203, 136 are provided, which can reduce the accuracy and cost required for processing the orthogonal mode coupler 1.
In order to facilitate the communication between the first channel and the second channel, the electromagnetic wave signal a1 entering the first rectangular waveguide cavity from the electromagnetic wave signal input port a is coupled and conveyed into the first rectangular waveguide cavity. As shown in fig. 8, a through hole is formed in the bottom surface of the middle waveguide structure block 12 close to the 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. 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 1205 and the cylindrical metal probe 1204. The cylindrical metal probe 1204 is preferably a first metal cylinder and a second metal cylinder 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 a connection transition surface of the first metal cylinder and the second metal cylinder is tightly attached to the cylindrical dielectric block 1205. In this embodiment, the first metal cylinder is spaced from the end of the first rectangular waveguide cavity by 0.25 λ g, the centerline of the second adjustment screw 136 is located within the symmetry plane of the second transition matching step 135 and perpendicular to the bottom surface, and the distance between the centerline of the second adjustment screw 136 and the centerline of the cylindrical metal probe 1204 is about 0.25 λ g.
the electromagnetic wave signal B1 entering the second rectangular waveguide cavity through the electromagnetic wave signal input port B is twisted by 90 degrees and enters the first rectangular waveguide cavity. As shown in fig. 5 and 6, a polarization torsion structure is disposed at an input end near the second rectangular waveguide cavity, the polarization torsion structure includes a first polarization torsion structure located at a lower end surface of the middle waveguide structure block 12, and a second polarization torsion structure located at an upper end surface of the lower waveguide structure block 13, the first polarization torsion structure includes a first polarization torsion groove 1207 and a first polarization torsion protrusion 1208 that are arranged in parallel, the second polarization torsion structure includes a second polarization torsion groove 132 and a second polarization torsion protrusion 133 that are arranged in parallel, and the first polarization torsion structure and the second polarization torsion structure are rotationally symmetric along a center line of a connection surface of the middle waveguide structure block 12 and the lower waveguide structure block 13 by 180 °. 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 the present embodiment, the widths of the first polarization torsion groove 1207 and the second polarization torsion groove 132 are slightly wider than the widths of the first polarization torsion protrusion 1208 and the second polarization torsion protrusion 133, (i.e. the widths of the first polarization torsion groove 1207 and the second polarization torsion groove 132 are the same and are both greater than 1/2 of the width of the second rectangular waveguide cavity, and the widths of the first polarization torsion protrusion 1208 and the second polarization torsion protrusion 133 are the same and are both less than 1/2 of the width of the second rectangular waveguide cavity), and the lengths of the second polarization torsion groove 132, the second polarization torsion protrusion 133, the first polarization torsion groove 1207 and the first polarization torsion protrusion 1208 (i.e. the length direction of the second rectangular waveguide cavity) are the same.
the electromagnetic wave signal a and the electromagnetic wave signal b entering the first square waveguide cavity are orthogonal to each other in the first square waveguide cavity, and are output through the electromagnetic wave signal first output port C and enter the polarization selector 2.
As shown in fig. 9 and 10, the polarization selector 2 includes a square-round transition 21, a second probe, a dielectric rotor 23, a matching piston 24, and a T-shaped base 25, and the polarization selector 2 is a 2-port network including 1 input channel and 1 output channel, where the input channel has an electromagnetic wave input port D, the electromagnetic wave input port D has the same size and is coincident with the electromagnetic wave signal first output port C, and the output channel has an electromagnetic wave signal second output port E. The input channel is connected with the output end of the first square waveguide cavity, and the input channel and the first square waveguide cavity are perpendicular to the output channel.
As shown in fig. 11, the square-round transition 21 is processed with: the interface slot 211, the square waveguide 212 and the circular waveguide 213 are provided with a second square waveguide inner cavity in the square waveguide 212, a circular waveguide inner cavity in the circular waveguide 213, and the center lines of the interface slot 211, the square waveguide 212 and the circular waveguide 213 are overlapped. A circle of bulges are arranged at the first electromagnetic wave signal output port C of the orthogonal mode coupler 1, and the first electromagnetic wave signal output port C of the orthogonal mode coupler 1 is inserted into the interface slot 211 to realize the connection between the orthogonal mode coupler 1 and the polarization selector 2. The inner length of the square waveguide 212 is longer than that of the first output port C of the electromagnetic wave signal, and the diameter of the circular waveguide 213 is longer than that of the square waveguide 212. Meanwhile, in order to facilitate smooth transition from the square waveguide 212 to the circular waveguide 213, rounded corners are disposed at top corners of the inner periphery of the square waveguide 212.
As shown in fig. 12 and 13, the T-shaped base 25 includes a vertical cubic metal block 251 and a horizontal flange 252, and a central line of the minimum surface of the cubic metal block 251 coincides with a central symmetry line of the flange 252. The T-shaped base 25 is provided with a circular ring protrusion 253, a first through hole 254, a cylindrical protrusion 256 and a second through hole 257 which are coaxial, the T-shaped base 25 is further provided with a rectangular waveguide cavity 255 which is perpendicular to the axes of the circular ring protrusion 253, the first through hole 254, the cylindrical protrusion 256 and the second through hole 257, the rectangular waveguide cavity 255 is superposed with and penetrates through the center lines of the cubic metal block 251 and the flange plate 252, the rectangular waveguide cavity 255 at one end of the flange plate 252 is provided with a second electromagnetic wave signal output port E, and the rectangular waveguide cavity 255 at one end far away from the flange plate 252 is provided with a matching piston 24. The matching piston 24 is shaped like a cube, the largest surface of which has the same size as the rectangular waveguide groove 255 of the T-shaped base 25, and the matching piston 24 is inserted into one end of the rectangular waveguide groove 255 away from the flange 252 and can move up and down.
The medium rotor 23 penetrates through the first through hole 254 and the second through hole 257, as shown in fig. 14, the medium rotor 23 includes a second cylinder 232, a key groove 234 is processed at the center of one end of the second cylinder 232, and two cutting surfaces of the key groove 234 are symmetrical along the central axis of the concentric circle; the other end of the second cylinder 232 is provided with a coaxial first cylinder 231, the diameter of the first cylinder 231 is smaller than that of the second cylinder 232, a blind hole 233 is milled in the center of the first cylinder 231, and the depth of the blind hole 233 is about 0.25 lambdag. Specifically, the diameter of the first via 254 is equal to the diameter of the first cylinder 231 of the media rotor 23, and the diameter of the second via 257 is equal to the diameter of the second cylinder 232 of the media rotor 23.
One end of the medium rotor 23 is provided with a second probe, that is, the blind hole 233 is inserted with the second probe, the other end of the second probe is located in the circular waveguide cavity of the input channel, and the central lines of the medium rotor 23 and the second probe coincide with the central line of the circular waveguide cavity. As shown in fig. 15, the second probe is a Z-shaped cylindrical metal probe 22, and the Z-shaped cylindrical metal probe 22 includes a first straight line segment 221, a second straight line segment 222, and a third straight line segment 223 connected in sequence. The first straight line section 221, the second straight line section 222 and the third straight line section 223 have the same diameter and are located in the same horizontal plane. The angle between the first straight line segment 221 and the second straight line segment 222 is an obtuse angle, and the angle between the second straight line segment 222 and the third straight line segment 223 is an acute angle. The Z-shaped cylindrical metal probe 22 can reduce the bending times of the second probe, reduce the difficulty of the second probe and improve the qualification rate of the second probe. Preferably, rounded transitions are provided 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.
As shown in fig. 16, the stepping motor 3 is connected to the other end of the media rotor 23, the stepping motor 3 includes a rotating shaft 31 and a motor body 32, one end of the rotating shaft 31 is inserted into the motor body 32, the end of the other end is processed into a flat key shape and inserted into the key groove 234 of the media rotor 23, and the size of the flat key at the end of the rotating shaft 31 is the same as the size of the key groove 211 of the media rotor 23. The stepping motor 3 drives the medium rotor 23 to rotate, so that the Z-shaped cylindrical metal probe 22 rotates by 360 degrees.
In the invention, except the cylindrical dielectric block 1205 and the dielectric rotor 23, which are commonly used dielectric materials, the other parts are all metal conductive materials.
The simple polarization tracker has the following working frequency: 12.25 GHz-12.75 GHz, the simple polarization tracker is applicable to other frequency bands in an equal scaling mode.
the working principle of the simple polarization tracker is as follows:
when the simple polarization tracker works in a receiving state, the electromagnetic wave signal input port A and the electromagnetic wave signal input port B become input ports, the electromagnetic wave signal second output port E becomes an output port, the electromagnetic wave signal input port A and the electromagnetic wave signal input port B respectively receive two orthogonal polarization components (a component and B component) on an antenna, the electromagnetic wave signal input port A couples the electromagnetic wave of the a component to the inlet end of the inner cavity of the first square waveguide through the combined action of the cylindrical dielectric block 1205 and the cylindrical metal probe 1204 and forms an electromagnetic wave a1 with the electric field direction parallel to the electromagnetic wave signal second output port E;
Through the combined action of the first polarization torsion groove 1207, the first polarization torsion groove 132, the first polarization torsion protrusion 1208 and the second polarization torsion protrusion 133, the electromagnetic wave of the B component input through the electromagnetic wave signal input port B is rotated by 90 degrees and directly input to the inlet end of the first square waveguide cavity and forms an electromagnetic wave B1 with the direction of the electric field perpendicular to the second electromagnetic wave signal output port E. a1 and b1 are orthogonal to each other and simultaneously exist in the first square waveguide cavity jointly composed of the fifth rectangular waveguide groove 1211 and the sixth rectangular waveguide groove 137. And then a1 and b1 are converted into an electromagnetic wave c1 in the circular waveguide 213 through the square-circle transition 21, the proportion of a1 and b1 is correspondingly changed according to the polarization direction of the received wave, so that the polarization direction of c1 in the section of the circular waveguide is changed, and as only the electromagnetic wave with the electric field direction parallel to the symmetrical section of the Z-shaped probe can be received by the Z-shaped cylindrical metal probe 22 and coupled into the second output port E of the electromagnetic wave signal, the rotating shaft 31 of the stepping motor 3 drives the medium rotor 23 and the Z-shaped cylindrical metal probe 22 to rotate together by 360 degrees to obtain the maximum rotation angle of energy, the rotation angle corresponds to the state matched with the satellite antenna, and on the basis, the polarization tracking function of a receiving end can be completed through a matched servo feedback system.
The linear polarization tracking of the transmitting frequency band and the linear polarization tracking of the receiving frequency band are reciprocal, and according to the orthogonality requirement of receiving and transmitting electromagnetic waves, if the polarization tracker of the receiving end is in a polarization matching state at a certain moment, the direction of the corresponding Z-shaped probe of the transmitting antenna is perpendicular to the direction of the Z-shaped probe of the receiving end at the moment.
Taking a simple polarization tracker used in the Ku receiving band as an example for detailed description, the electromagnetic wave signal input port a and the electromagnetic wave signal input port B of the quadrature mode coupler 1 are both 19.5mm × 9.525mm in size, the distance between the center points of the two is 14.525mm, and the electromagnetic wave signal first output port C is 14.1mm × 14.1mm in size.
in the first channel, the first rectangular matching step 111 and the second rectangular matching step 1201 are the same in size, the length and height of the three-stage step from low to high are respectively 11.3mm × 0.7mm, 9mm × 0.9mm and 9 × 0.9mm, the depth of the first rectangular waveguide groove 112 is 2.5mm, the distance from the electromagnetic wave signal input port A to the tail end of the first channel is 64.3mm, and the radius of a processed fillet in the first channel is 3 mm.
In the second channel, the distance from the electromagnetic wave signal input port B to the edges of the first polarization twist groove 1207 and the first polarization twist protrusion 1208 is 17.8mm, and the widths of the first polarization twist groove 1207 and the first polarization twist protrusion 1208 are 10.9mm and 6.6mm, respectively, both of which are 6mm in length. The length and height of the third step of the third rectangular matching step 1209 from low to high are respectively 6mm × 0.81mm, 4.4mm × 0.5mm and 7.5mm × 0.4mm, and the length and height of the third step of the first transition matching step 1210 from high to low are respectively 10.84 × 0.76mm, 11.28mm × 1.19mm and 24mm × 0.35 mm. The radius of a fillet machined in the second channel is 2 mm. The common centerline of the cylindrical dielectric block 1205 and the cylindrical metal probe 1204 is 60.04mm from port a.
The first adjusting screw 1203 and the second adjusting screw 136 are in an M1.6X 8 specification in GB/T73-85, the distance between the central symmetry line of the first adjusting screw 1203 and the bottom surface of the third rectangular waveguide groove 1206 is 4.4mm, and the distance between the central symmetry line of the second adjusting screw 136 and the central symmetry line of the cylindrical metal probe 1204 is 5.88 mm.
The interface slot 211 of the polarization selector 2 has dimensions of 17.1mm × 17.1mm × 1.5mm, the square waveguide 212 has dimensions of 15.5mm × 15.5mm × 7.5mm, the four rounded corners have a radius of 3mm, and the circular waveguide 213 has dimensions of Φ 17.5mm × 17.2 mm. The included angle between the first straight line segment 221 and the second straight line segment 222 in the Z-shaped cylindrical metal probe 22 is 105 °, and the included angle between the second straight line segment 222 and the 3 rd straight line segment 223 is 60 °.
The first cylinder 231 of the dielectric rotor 23 has dimensions of phi 3.5mm x 2mm, the second cylinder 231 has dimensions of phi 5mm x 12mm, the blind hole 233 has dimensions of phi 1mm x 6.04mm, and the width and depth of the key groove 234 are 1.5mm x 2mm, respectively.
in the T-shaped base 25, the cubic metal block 251 has dimensions of 31mm × 31mm × 13.525mm, the flange 252 has dimensions of 38mm × 33mm × 5mm, the first via 254 has dimensions of Φ 3.5mm, the second via 257 has dimensions of Φ 5mm, the cylindrical protrusion 256 has dimensions of Φ 22mm × 1.5mm, and the rectangular waveguide cavity 255 has cross-sectional dimensions of 19.5mm × 9.525 mm. The dimensions of the matching piston 24 are 19.5mm by 9.525mm by 10 mm.
The simple polarization tracker can be designed to be suitable for a Ku transmitting frequency band, namely 14-14.5 GHz. According to the above design dimensions, with the use of HFSS for simulation calculation, within the working bandwidth of 12.25GHz to 12.75GHz, when the angle between the second probe (i.e., the Z-shaped cylindrical metal probe 22) and the first channel width surface is 180 °, 90 °, 45 °, the common port standing wave ratio simulation results are shown in fig. 17 to 19; the insertion loss of the first channel and the isolation of the first channel from the second channel are shown in fig. 20; the second channel insertion loss and second channel to first channel isolation are shown in fig. 21. The phase difference between the first channel and the second channel is shown in fig. 22, and the calculation result of the phase difference between the first channel and the second channel is shown in table 1 below.
TABLE 1
Note: the direct subtraction of the 12.75GHz phase difference is-359.55 °, with the phase being 360 ° for one cycle, so the final equivalent is-359.55 ° +360 ° -0.45 °.
The simple polarization tracker of the embodiment has the standing-wave ratio of less than 1.15, the insertion loss of less than 0.8dB, the isolation of less than-50 dB and the phase difference of less than 1.8 degrees.
Parts of the invention not described in detail are common general knowledge of a person skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
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).
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| CN114335963A (en) * | 2022-03-10 | 2022-04-12 | 广州中雷电科科技有限公司 | Orthogonal mode coupler and design method |
| WO2023206814A1 (en) * | 2022-04-25 | 2023-11-02 | 成都天锐星通科技有限公司 | Orthomode transducer and dual-linearly polarized feed source |
| WO2024021734A1 (en) * | 2022-07-29 | 2024-02-01 | 四川太赫兹通信有限公司 | Terahertz waveguide structure, intermediate cavity, circuit structure and electronic device |
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