Cavity filters, resonant rods, flying rods and communication equipment

Abstract

The present invention provides a cavity filter, a resonance rod, a flying rod and a communication device, wherein the cavity filter comprises a cavity, a resonance rod and a flying rod, the resonance rod is arranged in the cavity; the flying rod is fixedly connected by the resonance rod and then assembled in the cavity. In the cavity filter, the resonance rod, the flying rod and the communication device provided by the present invention, the flying rod no longer relies on a specially designed slot and seat structure in the cavity for fixed assembly, which greatly simplifies the manufacture of the cavity and reduces the production cost of the product. At the same time, the flying rod is fixedly connected by the resonance rod to ensure the relative position of the end of the flying rod and the resonance rod, thereby achieving good cross coupling.

Description

Technical Field

[0001] The present invention relates to the field of communication, and in particular to a cavity filter, a resonance rod, a flying rod and a communication device comprising the cavity filter. Background Art

[0002] In a base station system of mobile communication, a communication signal carrying communication data within a specific frequency range is usually transmitted through a transmitting antenna, and a communication signal is received through a receiving antenna. The signal received by the receiving antenna includes not only the communication signal carrying communication data within the above-mentioned specific frequency range, but also many clutter or interference signals outside the above-mentioned specific frequency range. To obtain the communication signal carrying communication data within the specific frequency range transmitted by the transmitting antenna from the signal received by the receiving antenna, it is usually necessary to filter the signal received by the receiving antenna through a cavity filter to filter out clutter or interference signals outside the specific frequency of the communication signal carrying communication data.

[0003] Cavity filters are widely used as a frequency selection device. In the prior art, the cavity filter includes a box body, a cover plate, and a resonant rod. The cover plate covers the box body, a partition is provided in the box body to form multiple resonant cavities, and the resonant rod is fixed to the bottom surface of the cavity by screws. Usually, a flying rod is provided between two non-adjacent resonant cavities to achieve cross-coupling and suppress the clutter outside the passband of the cavity filter.

[0004] The existing flying rod is set up by forming a slot on the partition in the cavity, and fixing the middle area of ​​the flying rod by a socket matching the slot so that the two ends of the flying rod are suspended and close to the resonant rod. In this setting, the flying rod relies on the specially designed slot and socket in the cavity for assembly, which complicates the manufacturing, processing and assembly of the cavity. In addition, due to the error in the slot design, the relative position of the end of the flying rod and the resonant rod may deviate greatly, which is not conducive to achieving good cross coupling. Summary of the invention

[0005] The present invention provides a cavity filter, a resonant rod, a flying rod and a communication device comprising the cavity filter, so as to solve the technical problem in the prior art that the flying rod relies on specially designed slots and sockets in the cavity for assembly, which makes the manufacturing, processing and assembly of the cavity complicated.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a cavity filter, the cavity filter comprising:

[0007] Cavity;

[0008] A resonant rod, disposed in the cavity;

[0009] The flying rod is fixedly connected with the resonant rod and then assembled in the cavity.

[0010] According to an embodiment of the present invention, the cavity filter further comprises an insulating gasket, and the insulating gasket is interposed between the resonant rod and the flying rod.

[0011] According to an embodiment of the present invention, the cavity filter comprises an insulating screw, and the insulating screw fixedly connects the flying rod and the resonant rod.

[0012] According to an embodiment of the present invention, the flying rod includes a main rod and a connecting plate arranged at the end of the main rod, and the connecting plate is provided with a first connecting hole.

[0013] According to an embodiment of the present invention, the connecting plate is connected to the main rod in a T-shape.

[0014] According to an embodiment of the present invention, the resonant rod includes a tube body and a flange portion provided at one end of the tube body, and the flange portion is provided with a second connecting hole.

[0015] According to an embodiment of the present invention, the resonant rod further comprises a folded portion connected to the outer edge of the flange portion, and the folded portion is provided with a notch portion to accommodate the flying rod.

[0016] In order to solve the above technical problem, another technical solution adopted by the present invention is: providing a flying rod for a cavity filter, wherein the flying rod is provided with a first connecting hole for connecting with a resonant rod of the cavity filter.

[0017] In order to solve the above technical problem, another technical solution adopted by the present invention is: providing a resonance rod for a cavity filter, wherein the resonance rod is provided with a second connection hole for connecting a flying rod of the cavity filter.

[0018] To solve the above technical problems, another technical solution adopted by the present invention is: to provide a communication device, wherein the communication device includes the aforementioned cavity filter, and the communication device is at least one of a duplexer, a simplexer, a splitter, a combiner or a tower top amplifier.

[0019] In the cavity filter, resonant rod, flying rod and communication equipment provided by the present invention, the flying rod no longer relies on specially designed slots and socket structures in the cavity for fixed assembly, which greatly simplifies the manufacture and assembly of the cavity and reduces the production cost of the product. At the same time, the flying rod is fixedly connected through the resonant rod to ensure the relative position of the flying rod end and the resonant rod, thereby achieving good cross coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0021] Figure 1 It is a schematic diagram of a partial three-dimensional structure of a cavity filter provided by an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the partial cross-sectional structure of the cavity filter shown in FIG. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Please also read Figure 1 and Figure 2 ,in Figure 1 It is a schematic diagram of a partial three-dimensional structure of a cavity filter provided by an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the partial cross-sectional structure of the cavity filter shown in FIG.

[0027] An embodiment of the present invention provides a cavity filter, which includes a cavity (not shown), a resonant rod 100 , a flying rod 200 , an insulating gasket 300 and an edge screw 400 .

[0028] Among them, the cavity may include a metal box body and a metal cover plate, and the metal cover plate covers the metal box body to form a resonant cavity. The cavity provided by the embodiment of the present invention does not need to be designed with a slot, and does not need to be designed with a socket corresponding to the slot to fix the flying rod 200, and the processing of the cavity is relatively simpler.

[0029] The resonant rod 100 is disposed in the cavity. The resonant rod 100 can be disposed in the cavity by screw fixation, or the resonant rod 100 can be disposed in the cavity by welding fixation, or the resonant rod 100 can be disposed in the cavity by integral molding. The resonant rod 100 is usually in the shape of a hollow tube, which is used to receive a tuning screw (not shown) that passes through the cavity and extends therein to adjust the RF parameters. Since the cavity filter is a mature prior art, the content that does not involve the invention point can refer to the prior art and will not be repeated in this application.

[0030] In a specific embodiment of the present invention, the flying rod 200 is fixedly connected to the resonance rod 100 and then assembled in the cavity, the insulating gasket 300 is between the resonance rod 100 and the flying rod 200, and the insulating screw 400 fixes the flying rod 200 to the resonance rod 100.

[0031] Among them, the thickness of the insulating gasket 300 can be designed as needed to ensure the relative position between the flying rod 200 and the resonance rod 100. The accurate relative position between the flying rod 200 and the resonance rod 100 is conducive to achieving good cross-coupling. For example, the thickness of the insulating gasket 300 is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0032] The insulating screw 400 may also be an insulating fastener such as an insulating clip or an insulating rivet. The insulating screw 400 may be used alone or in combination with a nut according to actual needs.

[0033] In a specific embodiment of the present invention, the flying rod 200 is flat as a whole and is made of metal material, for example, by stamping. When it is made by stamping, the manufacturing efficiency is relatively high.

[0034] In other embodiments, the flying rod 200 may be made by casting or welding. When made by casting or welding, the end of the flying rod 200 may have a shape that matches the arc surface or arc edge of the resonance rod 100 .

[0035] In a specific embodiment of the present invention, the flying rod 200 includes a main rod 210 and a connecting plate 220 arranged at the end of the main rod 210. The connecting plate 220 is provided with a first connecting hole (unnumbered), and the first connecting hole can be a threaded hole or a through hole.

[0036] The width of the connecting plate 220 may be the same as or different from the width of the main rod 210. When the width of the connecting plate 220 is different from the width of the main rod 210, for example Figure 1 The width dimension of the connecting plate 220 shown in the figure is greater than the width dimension of the main body rod 210, and the connecting plate 220 and the main body rod 210 can be connected in a T-shape.

[0037] The flying rod 200 may be connected to a resonant rod 100 at one end, and the other end may be suspended and close to another resonant rod 100, or the two ends of the flying rod 200 may be connected to two resonant rods 100 respectively. When both ends of the flying rod 200 are connected to the resonant rod 100, the main rod 210 and the connecting plates 220 provided at the two ends of the main rod 210 may be connected in an "I" shape. The area of ​​the connecting plates 220 at the two ends of the main rod 210 may be relatively large to improve the cross-coupling performance.

[0038] The flying rod 200 can be connected to any position on the resonance rod 100 by means of insulating screws 400, and the connecting plate 220 can also be arc-shaped, matching the arc surface or arc edge of the resonance rod 100 and connected by means of insulating fixings.

[0039] In a specific embodiment of the present invention, the resonant rod 100 includes a tube body 110 and a flange portion 120 provided at one end of the tube body 110, and the flange portion 120 is provided with a second connection hole (not numbered), and the second connection hole can be a threaded hole or a through hole. The flying rod 200 can be connected to the upper surface of the flange portion 120, or the flying rod 200 can be connected to the lower surface of the flange portion 120, or the flying rod 200 can be connected to the outer end surface of the flange portion 120, or the flying rod 200 can be connected to the outer peripheral surface of the tube body 110.

[0040] In a specific embodiment of the present invention, the resonant rod 100 further includes a folded portion 130 connected to the outer edge of the flange portion 120 . The folded portion 130 is provided with a notch portion 132 to accommodate the flying rod 200 .

[0041] Please continue reading Figure 1 and Figure 2 The embodiment of the present invention further provides a flying rod 200 for a cavity filter. The flying rod 200 is provided with a first connecting hole for connecting with the resonant rod 100 of the cavity filter. The first connecting hole may be a threaded hole or a through hole.

[0042] Please continue reading Figure 1 and Figure 2The embodiment of the present invention further provides a resonance rod 100 for a cavity filter, and the resonance rod 100 is provided with a second connection hole for connecting a flying rod 200 of the cavity filter, and the second connection hole can be at least one of a threaded hole or a through hole.

[0043] An embodiment of the present invention further provides a communication device, which includes the aforementioned cavity filter, and the communication device is a duplexer, a simplexer, a splitter, a combiner, or a tower-top amplifier.

[0044] In the cavity filter, resonance rod 100, flying rod 200 and communication equipment provided by the present invention, the flying rod 200 no longer relies on specially designed slots and socket structures in the cavity for fixed assembly, which greatly simplifies the manufacture of the cavity and reduces the production cost of the product. At the same time, the flying rod 200 is fixedly connected through the resonance rod 100 to ensure the relative position of the end of the flying rod 200 and the resonance rod 100, thereby achieving good cross coupling.

[0045] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cavity filter, characterized in that: The cavity filter comprises: Cavity; A resonant rod, disposed in the cavity; A flying rod, fixedly connected by the resonant rod and then assembled in the cavity; Wherein, the flying rod comprises a main rod and a connecting plate arranged at the end of the main rod, and the connecting plate is provided with a first connecting hole, and the first connecting hole is used to connect with the resonant rod; The connecting plate is connected to the main rod in a T-shape; Wherein, the resonant rod comprises a tube body and a flange portion provided at one end of the tube body, the flange portion is provided with a second connecting hole, and the second connecting hole is used to connect with the flying rod; The resonant rod also includes a folded portion connected to the outer edge of the flange portion, and the folded portion is provided with a notch portion to accommodate the flying rod; Wherein, the cavity filter further comprises an insulating screw, and the insulating screw fixedly connects the flying rod and the resonant rod.

2. The cavity filter according to claim 1, characterized in that: The cavity filter further comprises an insulating gasket, wherein the insulating gasket is interposed between the resonant rod and the flying rod.

3. A flying rod for a cavity filter, characterized in that: Applied to the cavity filter according to any one of claims 1 to 2, the flying rod is provided with a first connecting hole for connecting with the resonant rod of the cavity filter.

4. A resonant rod for a cavity filter, characterized in that: Applicable to the cavity filter described in any one of claims 1-2, a second connection hole for connecting a flying rod of the cavity filter is provided on the resonant rod.

5. A communication device, characterized in that: The communication device comprises the cavity filter according to any one of claims 1 to 2, and the communication device is at least one of a duplexer, a simplexer, a splitter, a combiner or a tower top amplifier.

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