CN107112617B - Tower top amplifier, signal receiving and transmitting device, cavity filter and directional coupling structure - Google Patents
Tower top amplifier, signal receiving and transmitting device, cavity filter and directional coupling structure Download PDFInfo
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- CN107112617B CN107112617B CN201480083393.5A CN201480083393A CN107112617B CN 107112617 B CN107112617 B CN 107112617B CN 201480083393 A CN201480083393 A CN 201480083393A CN 107112617 B CN107112617 B CN 107112617B
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Abstract
The invention provides a tower top amplifier, a signal receiving and transmitting device, a cavity filter and a directional coupling structure, wherein the directional coupling structure of the cavity filter comprises a coupling piece and a coupling main rod which are coupled with each other, a fixed connecting block is arranged between the coupling piece and the coupling main rod, the fixed connecting block comprises a coupling piece connecting end and a coupling main rod connecting end, the coupling piece connecting end is fixed on the coupling piece, and the coupling main rod connecting end is fixed on the coupling main rod. Compared with the prior art, the cavity filter and the directional coupling structure thereof provided by the invention have the advantages that the fixed connecting block is additionally arranged between the coupling piece and the coupling main rod of the directional coupling structure, so that the directional coupling structure of the cavity filter can determine the distance and the angle between the coupling piece and the coupling main rod through simple assembly, and the consistency of the product coupling degree of the directional coupling structure of the cavity filter is ensured.
Description
Technical Field
The invention relates to the technical field of cavity filter structures, in particular to a tower top amplifier, a signal receiving and transmitting device, a cavity filter and a directional coupling structure thereof.
Background
The directional coupling structure is usually adopted on the filter to isolate, separate and mix signals, and essentially, the microwave signals are subjected to power distribution according to a certain proportion so as to complete the functions of power monitoring, source output power amplitude stabilization, signal source isolation, frequency sweep test of transmission and reflection and the like. Particularly, a coupling-piece type directional coupling structure is commonly used, and the coupling structure is realized by coupling between a coupling piece and a main rod.
The coupling piece and the main rod are in capacitive coupling, and the capacitive intensity of the coupling piece and the main rod is in direct relation with the distance, the effective coupling area and the relative dielectric constant between the coupling piece and the main rod. And the coupling between the coupling piece and the main rod directly determines the coupling degree of the directional coupling structure of the filter. The factors influencing the degree of coupling of the directional coupling structure of the filter mainly include: 1. the distance between the coupling piece and the main rod (excircle); 2. the effective coupling area of the coupling piece and the main rod. While affecting the effective coupling area is generally three factors: (1) coupling piece length and width; (2) the diameter of the main rod; (3) the angular relationship of the coupling tab and the primary lever, i.e., the relative positions of the coupling tab and the primary lever, is typically designed to be parallel. Wherein (1) and (2) are directly determined by the material size, and the precision is easy to guarantee. Therefore, how to ensure the relative position relationship between the coupling piece and the main rod becomes the key point for designing the directional coupling structure.
In the directional coupling structure in the prior art, a clamp is generally adopted to assist in welding a coupling piece and a PCB, the distance between the coupling piece (coupling surface) and the PCB and the angle between the coupling piece and the PCB are controlled, then the welded PCBA is assembled on a cavity, and finally the PCBA is positioned and locked through a screw via hole of the screw and the PCB. Referring to fig. 1, fig. 1 is a partial schematic view of a directional coupling structure after assembly in the prior art, in which 110 is a coupling sheet, 120 is a main bar, and 130 is a PCB (Printed circuit board).
Factors influencing the assembly angle of the coupling piece and the main rod are many, such as the position error of the main rod via hole axis and the PCBA mounting hole of the cavity, the position error of the mounting screw via hole and the coupling piece mounting via hole on the PCB, the assembly error of the mounting screw and the PCB screw via hole during the assembly of the coupling piece and the PCBA, and the like. These error accumulations can cause large deviations in the angular relationship of the coupling tabs to the axis of the primary shaft from the design expectations.
Therefore, the problems with the above-described assembly are: the distance between the coupling piece and the main rod (excircle) and the angle between the coupling piece and the main rod are difficult to accurately control, so that the consistency of products is poor during batch production, the influence of assembly factors on the coupling strength is large, and the rework rate is high (about 30-40%). The remedy method after the reworking mainly comprises the following steps: (1) re-welding the coupling piece, and adjusting the distance and the relative angle between the coupling piece and the main rod; (2) the electronic components (such as capacitance or inductance, resistance) of the PCBA are replaced to make up for the difference of the coupling degree between the coupling piece and the main rod. It is evident that rework requires a large amount of material and lost man-hours.
The following is an example to explain the factors causing the inconsistency of the distance between the coupling piece and the main rod (outer circle), and thus the inconsistency of the degree of coupling. Suppose that: 1. the diameter D of the main rod is 5mm, and the length L of the main rod is 100 mm; 2. the diameter D of the main rod via hole of the cavity is 11.5mm, and the length is 100 mm; 3. the PCBA mounting surface and the main rod through hole are respectively positioned on the upper surface (or the bottom surface) and the side surface of the filter cavity; 4. the common finishing equipment and the economic finishing precision grade are adopted.
Its accumulated error includes: 1. diameter error of the main rod: is approximately equal to +/-0.02; 2. distance error between PCBA installation face and mobile jib via hole center: is approximately equal to +/-0.08; 3. coaxiality error when mobile jib and mobile jib via hole assembly: 0.14 is approximately distributed; 4. assembly error between the coupling piece and the PCB: approximatively. + -. 0.05. From the above analysis, the cumulative common error of the distance of the coupling piece from the main rod (outer circle) is about: + (0.02/2+0.08+0.14/2+0.05) ± (0.02/2+ 0.08) ± 0.21 mm.
According to the practical experience of production, when the distance between the coupling piece and the main rod (excircle) is controlled to be +/-0.1 mm, the consistency of the coupling degree can be well ensured. The design and assembly methods of the prior art are far from this requirement.
Disclosure of Invention
The embodiment of the invention provides a filter and a directional coupling structure thereof, and aims to solve the technical problem that the directional coupling structure of a cavity filter in the prior art cannot guarantee the distance between a coupling piece and a coupling main rod and the angle between the coupling piece and the coupling main rod.
In order to solve the above problem, an embodiment of the present invention provides a directional coupling structure of a cavity filter, where the directional coupling structure of the cavity filter includes a coupling piece and a coupling main rod, which are coupled to each other, a fixed connection block is disposed between the coupling piece and the coupling main rod, the fixed connection block includes a coupling piece connection end and a coupling main rod connection end, the coupling piece connection end fixes the coupling piece, and the coupling main rod connection end fixes the coupling main rod.
In order to solve the above technical problem, an embodiment of the present invention further provides a fixed connection block, where the fixed connection block is used to fix a relative position between a coupling plate and a coupling main rod in a filtering process, and the fixed connection block includes a coupling plate connection end and a coupling main rod connection end, the coupling plate connection end fixes the coupling plate, and the coupling main rod connection end fixes the coupling main rod.
To solve the above technical problem, an embodiment of the present invention further provides a cavity filter, where the cavity filter includes the directional coupling structure recited in the above claims.
In order to solve the above technical problem, an embodiment of the present invention further provides a tower top amplifier, where the tower top amplifier includes a low noise amplifier and a band pass filter, and the band pass filter is the cavity filter as claimed in the above claims.
In order to solve the above technical problem, an embodiment of the present invention further provides a signal transceiver, where the signal transceiver includes the cavity filter, the radio frequency low noise amplifier, the circulator, the combiner, the radio frequency power amplifier, and the transmitting antenna of the above claims, and the cavity filter is connected to the receiving antenna and filters the received signal; the radio frequency low noise amplifier is connected with the signal output end of the cavity filter; the circulator is connected with the signal output end of the radio frequency low noise amplifier; the combiner is connected with the circulator; the input end of the radio frequency power amplifier is connected with the signal output end of the combiner, and the output end of the radio frequency power amplifier is connected with the cavity filter; and the transmitting antenna is used for receiving the output signal of the cavity filter and transmitting the signal.
Compared with the prior art, the cavity filter and the directional coupling structure thereof provided by the invention have the advantages that the fixed connecting block is additionally arranged between the coupling piece and the coupling main rod of the directional coupling structure, so that the directional coupling structure of the cavity filter can determine the distance and the angle between the coupling piece and the coupling main rod through simple assembly, and the consistency of the product coupling degree of the directional coupling structure of the cavity filter is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a partial schematic view of a prior art assembled directional coupling structure;
FIG. 2 is a schematic diagram of a preferred embodiment of the directional coupling structure of the cavity filter according to the present invention;
FIG. 3 is a schematic structural diagram of a first embodiment of a fixed connection block and a coupling piece of a directional coupling structure of a cavity filter according to the present invention;
FIG. 4 is a front view of the fixed connection block of FIG. 3;
fig. 5 is a schematic structural diagram of a coupling main rod in the directional coupling structure of the cavity filter according to the present invention;
FIG. 6 is a schematic structural diagram of a fixed connection block and a coupling piece of a directional coupling structure of a cavity filter according to a second embodiment of the present invention;
FIG. 7 is a front view of the fixed connection block of FIG. 6;
FIG. 8 is a schematic structural diagram of a third embodiment of the fixed connection block and the coupling piece of the directional coupling structure of the cavity filter according to the present invention;
FIG. 9 is a schematic structural diagram of a fixed connection block of a directional coupling structure of a cavity filter according to a fourth embodiment of the present invention; and
fig. 10 is a block diagram of a preferred embodiment of the signal transceiver apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a preferred embodiment of a directional coupling structure of a cavity filter according to the present invention, the directional coupling structure of the cavity filter includes a coupling piece 210 and a coupling rod 220 coupled with each other, a fixed connection block 230 is disposed between the coupling piece 210 and the coupling rod 220, the fixed connection block includes a coupling piece connection end and a coupling rod connection end, the coupling piece connection end of the fixed connection block 230 fixes the coupling piece 210, and the coupling rod connection end of the fixed connection block 230 fixes the coupling rod 220.
According to the directional coupling structure of the cavity filter, the connecting fixing block is additionally arranged between the coupling piece and the coupling main rod of the directional coupling structure, so that the distance and the angle between the coupling piece and the coupling main rod can be determined by the directional coupling structure of the cavity filter through simple assembly, and the consistency of the product coupling degree of the directional coupling structure of the cavity filter is ensured.
The structure of the fixed connecting block will be described in detail below.
Example one
Referring to fig. 3 and 4 together, fig. 3 is a schematic structural view illustrating a fixed connection block of a directional coupling structure of a cavity filter according to a first embodiment of the present invention, and fig. 4 is a front view of the fixed connection block in fig. 3, where the fixed connection block includes a coupling piece connection end and a coupling main rod connection end.
In this embodiment, the coupling piece connecting end and the coupling main rod connecting end are preferably integrally formed, but in other embodiments, the coupling piece connecting end and the coupling main rod connecting end may be separately formed and then fixed together by fastening with screws, fastening with buckles, or welding.
Specifically, the coupling tab connection end includes a coupling tab accommodation slot 231 and a coupling tab pressing structure 232. The bottom surface of the receiving groove 231 is preferably flat so as to be closely fitted with the coupling tab 210. The compressing structure 232 includes a bending portion 2321 and a compressing portion 2322 integrally extending with the bending portion 2321, the bending portion 2321 inwardly extends from two sides of the fixed connecting block 230 to form a shape of surrounding the coupling piece 210, and the compressing portion 2322 compresses the upper surface of the coupling piece 210. One end of the coupling piece receiving groove 231 is further provided with a positioning portion 233, and the positioning portion 233 is a boss integrally extended from the end of the coupling piece receiving groove 231 with the body of the fixed connection block 230, for defining the in-plane position of the coupling piece 210. In this embodiment, the boss is divided into two parts, which extend from two sides of the end of the coupling piece accommodation slot 231, respectively, and the middle of the boss is provided with a notch for avoiding the pin 211 of the coupling piece 210.
The coupling main rod connecting end comprises a coupling main rod accommodating cavity 234 with an inner contour matched with the periphery of the coupling main rod 220, an arc-shaped groove 2341 is formed in one side, close to the coupling piece accommodating groove 231, of the main rod accommodating cavity 234, a furled encircling portion 2342 is arranged on the other side of the main rod accommodating cavity, and the arc-shaped groove 2341 is matched with an inner contact surface of the encircling portion 2342 to clamp the coupling main rod 220. The radian radius of the arc-shaped groove 2341 is slightly larger than the radius of the coupling main rod 220, so that the radial dimension error (about 0.02 mm) of the coupling main rod 220 can be contained, the constant contact between the coupling main rod 220 and the bottom line of the arc-shaped groove 2341 is ensured, and the stable and consistent distance between the coupling piece 210 and the outer circle of the coupling main rod 220 is further ensured. The distance between the bottom line of the arc-shaped groove 2341 and the bottom surface of the coupling piece accommodating groove 231 is the distance between the coupling main rod 220 and the coupling piece 210 required by design, the fixed connecting block 230 can be subjected to injection molding by using a mold, and fine machining is performed by a milling machine after molding, so that the production efficiency is high. The distance precision (the distance between the bottom line of the arc-shaped groove 2341 and the bottom surface of the coupling piece accommodating groove 231) obtained by the processing method can reach +/-0.03 mm, the total error can be controlled within +/-0.1 mm by adding the processing error of the fixed connecting block 230 and the assembly errors of the coupling main rod 220, the coupling piece 210 and the fixed connecting block 230, and the requirement of coupling consistency can be met.
Preferably, the fixing connection block 230 is made of an elastic material, and may be made of a resin material such as PET (polyethylene terephthalate), PVC (polyvinyl chloride), and PTFE (polytetrafluoroethylene), or a hard rubber material.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a coupling main rod in a directional coupling structure of a cavity filter according to the present invention; preferably, a step groove 221 is formed on the coupling main rod 220, and a coupling main rod connection end of the fixed connection block 230 is clamped in the step groove 221 to prevent the fixed connection block 230 from axially moving along the coupling main rod 220.
The fixed connection piece that this embodiment provided can be fixed firm with the coupling piece through the compact structure of both sides, and in addition, coupling mobile jib link can ensure the stable connection with the coupling mobile jib through setting up to the portion structure of embracing that suits with coupling mobile jib outline.
Example two
Referring to fig. 6 and 7 together, fig. 6 is a schematic structural view of a fixed connection block of a directional coupling structure of a cavity filter according to a second embodiment of the present invention, and fig. 7 is a front view of the fixed connection block in fig. 6; the fixed connecting block also comprises a coupling piece connecting end and a coupling main rod connecting end. The coupling tab connection end includes a coupling tab accommodation slot 331 and a coupling tab pressing structure. The bottom surface of the coupling piece accommodation groove 331 is a plane so as to be closely fitted with the coupling piece 210. The pressing structure includes a bent portion 3321 and a pressing portion 3322 integrally extended from the bent portion 3321, the bent portion 3321 extends from one side of the fixed connection block and covers the upper surface of the coupling piece 210, and the pressing portion 3322 hooks the coupling piece 210 from the side of the coupling piece 210 to press the coupling piece 210. The bent portion 3321 is provided with a supporting protrusion 3323 at a position corresponding to the upper surface of the coupling piece 210, and the supporting protrusion 3323 is used to assist the bent portion 3321 to press the upper surface of the coupling piece 210.
The coupling main rod connecting end also includes a coupling main rod accommodating cavity 334 having an inner contour adapted to the outer periphery of the coupling main rod 220, the main rod accommodating cavity 334 is provided with an arc-shaped groove 3341 at one side close to the coupling piece accommodating cavity 331, the other side is provided with a furled surrounding portion 3342, and the arc-shaped groove 3341 is matched with the inner contact surface of the surrounding portion 3342 to clamp the coupling main rod 220. The radian radius of the arc-shaped groove 3341 is slightly larger than the radius of the coupling main rod 220, so that the radial dimension error (about 0.02 mm) of the coupling main rod 220 can be contained, the constant contact between the coupling main rod 220 and the bottom line of the arc-shaped groove 3341 is ensured, and the stable and consistent distance between the coupling piece 210 and the outer circle of the coupling main rod 220 is further ensured. The distance between the bottom line of the arc-shaped groove 3341 and the bottom surface of the coupling piece accommodating groove 331 is the distance between the coupling main rod 220 and the coupling piece 210 which meet the design requirements, the fixed connecting block can be formed by injection molding through a mold, and fine machining is carried out after molding through a milling machine, so that the production efficiency is high. The distance precision (the distance between the bottom line of the circular arc-shaped groove 3341 and the bottom surface of the coupling piece accommodating groove 331) obtained by the processing method can reach +/-0.03 mm, the total error can be controlled within +/-0.1 mm by the processing error of the fixed connecting block and the assembly errors of the assembly coupling main rod 220, the coupling piece 210 and the fixed connecting block, and the requirement of coupling consistency can be met.
Preferably, the material of the fixed connection block is an elastic material, and may be a resin material such as PET (polyethylene terephthalate), PVC (polyvinyl chloride), PTFE (polytetrafluoroethylene), or a hard rubber material.
The difference between this embodiment and the previous embodiment is that the connection end of the coupling piece in this embodiment adopts a structural form of holding the coupling piece tightly on one side, and in addition, a supporting protrusion for assisting the bending part to press the upper surface of the coupling piece is arranged on the bending part, so that the fixed connection block can be firmly matched with the coupling piece.
EXAMPLE III
Referring to fig. 8, fig. 8 is a schematic structural view of a fixed connection block and a coupling plate of a directional coupling structure of a cavity filter according to a third embodiment of the present invention, where a connection end of the coupling plate of the fixed connection block includes a coupling plate receiving groove and a coupling plate pressing structure. The bottom surface of the receiving groove is preferably flat so as to be closely fitted with the coupling piece 210. The pressing structure includes a bending portion 4321 and a pressing portion 4322 extending integrally with the bending portion 4321, the bending portion 4321 extends from opposite corners of two sides of the fixed connection block, and the pressing portion 4322 located at an end of the bending portion 4321 presses an upper surface edge of the coupling piece 210. Of course, the number of the pressing structures is not limited to two, and the arrangement position of the pressing structures is not limited to the diagonal position in this embodiment, and a plurality of pressing structures may be arranged uniformly along the edge of the fixed connection block, which is within the scope that those skilled in the art can understand, and will not be described herein again.
In addition, one end of the coupling piece accommodating groove is further provided with a positioning portion 4323 for defining the plane position of the coupling piece, in this embodiment, the positioning portion 4323 is an angular boss integrally extending with the fixed connection block main body, and the angular boss positions the plane position of the coupling piece 210 from the opposite angle of the coupling piece. Similarly, the angular bosses may be provided in two (as illustrated in the present embodiment), or may be provided in 4, and are located at four corners of the coupling piece 210.
In this embodiment, the connecting end of the coupling main rod also includes a coupling main rod receiving cavity having an inner contour matching with the outer periphery of the coupling main rod, the main rod receiving cavity has an arc-shaped groove 4341 at one side close to the coupling piece receiving cavity, and a furled surrounding portion 435 is disposed at the other side, and the arc-shaped groove 4341 cooperates with the inner contact surface of the surrounding portion 435 to clamp the coupling main rod. Different from the above embodiments, the width of the surrounding portion 435 in this embodiment is smaller than the width of the connecting end of the coupling piece at the top thereof, and the number of the surrounding portions 435 is not limited to two as shown in the drawings of this embodiment, and may be multiple, and the surrounding portions are uniformly arranged along two sides of the coupling fixing block, so that the fixing connecting block is more firmly connected with the coupling main rod. The inner contour shape and structural features of the circular arc-shaped groove 4341 are the same as those of the above-described embodiment, and are not described in detail here.
The material of the fixed connection block in this embodiment is also an elastic material, and may be a resin material such as PET (polyethylene terephthalate), PVC (polyvinyl chloride), PTFE (polytetrafluoroethylene), or a hard rubber material.
In addition, referring to fig. 9, fig. 9 is a schematic structural diagram of a fixed connection block of a directional coupling structure of a cavity filter according to a fourth embodiment of the present invention, in which the fixed connection block 530 has a simple structure, and the overall structure is a strip plate structure with a groove on one side, one side with the groove is matched with the coupling main rod, and the other side is connected with the coupling piece through a screw, and the fixed connection block and the coupling main rod are assembled to be close to each other to ensure a distance between the coupling main rod and the coupling piece.
The fixed connecting block in the embodiment has a simple structure, is easy to process, and can realize the positioning between the coupling main rod and the coupling piece through the close assembly of the coupling main rod and the fixed connecting block.
In addition, the embodiment of the invention also provides a tower top amplifier, which comprises a low noise amplifier and a band-pass filter, wherein the band-pass filter can be the cavity filter in the embodiment. Other structural features of the tower top amplifier are within the understanding of those skilled in the art and will not be described in detail herein.
Meanwhile, an embodiment of the present invention further provides a signal transceiver, please refer to fig. 10, where fig. 10 is a block diagram of a preferred embodiment of the signal transceiver of the present invention. The signal transceiver comprises a cavity filter 1, a radio frequency low noise amplifier 2, a circulator 4, a combiner 7, a radio frequency power amplifier 3 and a transmitting antenna 6 in the embodiment, wherein the cavity filter 1 is connected with a receiving antenna 5 and filters a received signal; the radio frequency low noise amplifier 2 is connected with the signal output end of the cavity filter 1; the circulator 4 is connected with the signal output end of the radio frequency low noise amplifier 2; the combiner 7 is connected with the circulator 4; the input end of the radio frequency power amplifier 3 is connected with the signal output end of the combiner 7, and the output end is connected with the cavity filter 1; the transmitting antenna 6 is used for receiving the output signal of the cavity filter 1 and transmitting the signal.
The above description is only a part of the preferred embodiments of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures made by using the contents of the present specification and the accompanying drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (27)
1. The directional coupling structure of the cavity filter is characterized by comprising a coupling piece and a coupling main rod which are coupled with each other, wherein a fixed connecting block is arranged between the coupling piece and the coupling main rod and comprises a coupling piece connecting end and a coupling main rod connecting end, the coupling piece connecting end is fixed on the coupling piece, and the coupling main rod connecting end is fixed on the coupling main rod;
the fixed connecting block is made of resin materials or hard rubber materials.
2. The directional coupling structure according to claim 1, wherein the coupling tab connection end includes a coupling tab receiving slot and a coupling tab hold-down structure.
3. The directional coupling structure according to claim 2, wherein the coupling piece pressing structure comprises a bent portion and a pressing portion extending integrally with the bent portion.
4. The directional coupling structure according to claim 3, wherein the bent portions extend inward from both sides of the fixed connection block, and the pressing portions press the upper surfaces of the coupling pieces.
5. The directional coupling structure according to claim 4, wherein one or both ends of the coupling piece accommodating groove are provided with positioning portions for defining an in-plane position of the coupling piece.
6. The directional coupling structure according to claim 3, wherein the bent portion extends from one side of the fixed connection block to cover an upper surface of the coupling piece, and the pressing portion presses the coupling piece by hooking from a side surface of the coupling piece.
7. The directional coupling structure according to claim 6, wherein the bent portion is provided with a supporting protrusion at a position corresponding to the upper surface of the coupling piece, and the supporting protrusion is used to assist the bent portion to press the upper surface of the coupling piece.
8. The directional coupling structure according to claim 1, wherein the coupling main rod connection end includes a coupling main rod receiving cavity having an inner contour that fits an outer periphery of the coupling main rod.
9. The directional coupling structure according to claim 8, wherein the coupling rod receiving cavity has a circular arc groove on one side near the coupling piece receiving groove, and a furled embracing portion on the other side, and the circular arc groove cooperates with an inner contact surface of the embracing portion to clamp the coupling rod.
10. The directional coupling structure of claim 9, wherein the number of the embracing portions is two or more.
11. The directional coupling structure according to claim 1, wherein a step groove is provided on the coupling main rod, and the coupling main rod connecting end of the fixed connecting block is clamped in the step groove.
12. The directional coupling structure according to any one of claims 1 to 11, wherein the fixed connection block is made of an elastic material.
13. A fixed connecting block is characterized in that the fixed connecting block is used for fixing the relative position between a coupling piece and a coupling main rod in filtering, the fixed connecting block comprises a coupling piece connecting end and a coupling main rod connecting end, the coupling piece connecting end is fixed with the coupling piece, and the coupling main rod connecting end is fixed with the coupling main rod;
the fixed connecting block is made of resin materials or hard rubber materials.
14. The fixed connection block of claim 13, wherein the coupling tab connection end comprises a coupling tab receiving slot and a coupling tab compression structure.
15. The fixed connection block of claim 14, wherein the coupling piece pressing structure comprises a bent portion and a pressing portion integrally extending with the bent portion.
16. The fixed connection block of claim 15, wherein the bent portion extends inward from both sides of the fixed connection block, and the pressing portion presses an upper surface of the coupling piece.
17. The fixed connection block of claim 16, wherein one or both ends of the coupling piece receiving groove are provided with a positioning portion for defining an in-plane position of the coupling piece.
18. The fixed connection block of claim 15, wherein the bent portion extends from one side of the fixed connection block to cover an upper surface of the coupling piece, and the pressing portion presses the coupling piece by hooking from a side surface of the coupling piece.
19. The fixed connecting block of claim 18, wherein the bent portion is provided with a supporting protrusion at a position corresponding to the upper surface of the coupling piece, and the supporting protrusion is used to assist the bent portion to press the upper surface of the coupling piece.
20. The fixed connection block of claim 13, wherein the coupling stem connection end comprises a coupling stem receiving cavity having an inner profile that fits around an outer periphery of the coupling stem.
21. The fixed connection block of claim 20, wherein the coupling rod receiving cavity is provided with a circular arc-shaped groove at one side close to the coupling piece receiving groove, and a furled embracing portion at the other side, and the circular arc-shaped groove is matched with an inner contact surface of the embracing portion to clamp the coupling rod.
22. The fixed connection block of claim 21, wherein the number of embracing portions is two or more.
23. The fixed connection block of claim 13, wherein a step groove is formed in the coupling main rod, and the coupling main rod connection end of the fixed connection block is clamped in the step groove.
24. A fixed connection block as claimed in any one of claims 13 to 23, wherein the fixed connection block is made of an elastic material.
25. A cavity filter, characterized in that it comprises a directional coupling structure according to any of claims 1-12.
26. A tower mounted amplifier, comprising: the tower top amplifier comprises a low noise amplifier and a band pass filter, the band pass filter being the cavity filter of claim 25.
27. A signal transceiving apparatus, characterized in that:
the cavity filter of claim 25, wherein the cavity filter is connected to the receiving antenna and filters the received signal;
the radio frequency low noise amplifier is connected with the signal output end of the cavity filter;
the circulator is connected with the signal output end of the radio frequency low noise amplifier;
the combiner is connected with the circulator;
the input end of the radio frequency power amplifier is connected with the signal output end of the combiner, and the output end of the radio frequency power amplifier is connected with the cavity filter;
and the transmitting antenna is used for receiving the output signal of the cavity filter and transmitting the signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/094818 WO2016101175A1 (en) | 2014-12-24 | 2014-12-24 | Tower amplifier, signal transmitting and receiving device, cavity filter and directional coupled structure |
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| CN107112617A CN107112617A (en) | 2017-08-29 |
| CN107112617B true CN107112617B (en) | 2020-03-31 |
| CN107112617A8 CN107112617A8 (en) | 2020-03-31 |
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| WO (1) | WO2016101175A1 (en) |
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| CN103840235A (en) * | 2013-12-09 | 2014-06-04 | 福建星海通信科技有限公司 | Improved coupling structure of filter |
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| CN101009396B (en) * | 2007-01-18 | 2010-11-10 | 华为技术有限公司 | Directional coupler and the device with the same |
| CN202178373U (en) * | 2011-08-08 | 2012-03-28 | 深圳市大富科技股份有限公司 | Radio frequency communication device, coupling module and coupling adjustment mechanism thereof |
| CN203277607U (en) * | 2013-01-21 | 2013-11-06 | 深圳市大富科技股份有限公司 | Coupling device, cavity filter and communication radio frequency device |
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2014
- 2014-12-24 CN CN201480083393.5A patent/CN107112617B/en active Active
- 2014-12-24 WO PCT/CN2014/094818 patent/WO2016101175A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599569A (en) * | 2009-07-17 | 2009-12-09 | 华为技术有限公司 | Coupled structure and coaxial cavity filter |
| CN202217756U (en) * | 2011-08-30 | 2012-05-09 | 武汉凡谷电子技术股份有限公司 | Capacitive coupling structure for filter |
| CN103840235A (en) * | 2013-12-09 | 2014-06-04 | 福建星海通信科技有限公司 | Improved coupling structure of filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107112617A (en) | 2017-08-29 |
| CN107112617A8 (en) | 2020-03-31 |
| WO2016101175A1 (en) | 2016-06-30 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CI02 | Correction of invention patent application | ||
| CI02 | Correction of invention patent application |
Correction item: Applicant|Address|Applicant Correct: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd.|518108 floor 101 and 2, A4, A1, A2, A3, the third industrial zone, Shajing Industrial Company, he Xiang Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province|Anhui Dafu Electromechanical Technology Co., Ltd. False: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd.|518108 floor 101 and 2, A4, A1, A2, A3, the third industrial zone, Shajing Industrial Company, he Xiang Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Number: 35-01 Page: The title page Volume: 33 Correction item: Applicant|Address|Applicant Correct: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd.|518108 floor 101 and 2, A4, A1, A2, A3, the third industrial zone, Shajing Industrial Company, he Xiang Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province|Anhui Dafu Electromechanical Technology Co., Ltd. False: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd.|518108 floor 101 and 2, A4, A1, A2, A3, the third industrial zone, Shajing Industrial Company, he Xiang Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Number: 35-01 Volume: 33 |
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| CP03 | Change of name, title or address |
Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Patentee after: ANHUI DAFU ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Address before: 518108 Floors 101, 2 and A4 of A1, A2, A3 in the Third Industrial Zone of Shajing Street, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. Patentee before: ANHUI DAFU ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. |