CN204706616U - Cavity body filter, duplexer and radio frequency remote equipment - Google Patents
Cavity body filter, duplexer and radio frequency remote equipment Download PDFInfo
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- CN204706616U CN204706616U CN201520229202.3U CN201520229202U CN204706616U CN 204706616 U CN204706616 U CN 204706616U CN 201520229202 U CN201520229202 U CN 201520229202U CN 204706616 U CN204706616 U CN 204706616U
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Abstract
The utility model provides a kind of temperature to float good stability, can not produce power sparking and the low cavity body filter of processing cost, comprise cavity and cover plate, cover plate capping cavity forms resonant cavity, and cover plate comprises near the first cover plate of cavity side and the second cover plate away from cavity side; First cover plate is provided with the shaping and resonant column that is that stretch out to cavity bottom of integrated punching with it, and resonant column is closed in the one end near cavity bottom, away from the tubular of the one end open of cavity bottom; Second cover plate is provided with tuning screw, and tuning screw to stretch in resonant column and abuts resonant column blind end end face.
Description
Technical field
The utility model relates to domain of communication equipment, particularly relates to a kind of cavity body filter, duplexer and radio frequency remote equipment.
Background technology
Cavity body filter, as a kind of frequency selection device, for selecting communication signal frequency and clutter outside filtering communication signal frequency or interference signal, is widely used in mobile base station.Existing cavity body filter generally comprises cavity and cover plate, and cover plate capping cavity forms resonant cavity, and the bottom of resonant cavity is provided with the resonant column stretched out towards cover plate, and resonant column is the tubular that one end open is closed in one end.Cover plate is provided with the tuning screw stretched out in resonant column, to regulate the frequency of cavity body filter.
Existing resonant column mounting means has two kinds, and first kind of way is: first stamp out single tubular resonant column, then process installation base in the bottom of cavity, be finally screwed on installation base by resonant column again.This mode has following defect: 1) for the cavity that volume is smaller, and the space proportion that installation base occupies is comparatively large, can increase the Insertion Loss of cavity body filter; 2) the contact-making surface out-of-flatness of resonant column and installation base, causes loose contact between the two, and then affects intermodulation and the Insertion Loss of cavity body filter.3) resonant column has certain rigging error, makes can not reach predetermined requirement at adjacent resonant column and the distance flown between bar, and then affects resonant column and the index that is coupled flown between bar.
The second way is: by resonant column and cavity integrated punching shaping.Although this mode overcomes the first scheme Problems existing, but also there is following several defect in this mode: 1) resonant column must equally adopt aluminum alloy materials manufacture with cavity, and the volume of aluminium alloy is acted upon by temperature changes very large, thus concerning some temperature drifts require higher cavity body filter, can not manufacture in this way.2) tuning screw is positioned at resonant cavity, and and capacitive coupling between resonant column, because the threaded portion of tuning screw outer surface is relatively more sharp-pointed, can point discharge be caused, and then produce power sparking.3) because cavity body structure is complicated, higher to the requirement of diel.
Summary of the invention
The purpose of this utility model is to provide a kind of temperature to float good stability, can not produce power sparking and low cavity body filter, duplexer and the radio frequency remote equipment of processing cost.
The cavity body filter that the utility model provides comprises cavity and cover plate, and cover plate capping cavity forms resonant cavity, cover plate comprises near the first cover plate of cavity side and the second cover plate away from cavity side; First cover plate is provided with the shaping and resonant column that is that stretch out to cavity bottom of integrated punching with it, and resonant column is closed in the one end near cavity bottom, away from the tubular of the one end open of cavity bottom; Second cover plate is provided with tuning screw, and tuning screw to stretch in resonant column and abuts resonant column blind end end face.
The duplexer that the utility model provides comprises receiving filter and emission filter, receiving filter is connected between receiving terminal and antenna terminal, emission filter is connected to and sends between terminal and antenna terminal, the cavity body filter that receiving filter and emission filter provide for the utility model.
The radio frequency remote equipment that the utility model provides comprises the duplexer that radio-frequency (RF) transceiver module, power amplifier module and the utility model provide, and radio-frequency (RF) transceiver module is connected with power amplifier module, and power amplifier module is connected with duplexer.
The cavity body filter that the utility model provides, resonant column and the first cover plate one-body molded, thus resonant column can adopt the different high temperature with cavity to waft stability material manufacture, thus improves the temperature drift stability of cavity body filter.First cover plate is only one flat plate, simply too much relative to structure cavity, and the mould structure accordingly for punching press resonant column and the first cover plate is also very simple.In addition, because tuning screw assembly is positioned at outside the resonant cavity that the first cover plate capping cavity formed, around electromagnetic field is not had, thus can not point discharge, also can not produce power sparking.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 cavity body filter stereogram;
Fig. 2 cavity body filter profile
Fig. 3 first cover plate stereogram;
Fig. 4 second cover plate and tuning screw assembly stereogram.
Fig. 5 is the structural representation of duplexer;
Fig. 6 is the structural representation of radio frequency remote equipment;
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
As shown in Figures 1 to 4, the cavity body filter that the present embodiment provides, comprises cavity 110 and cover plate 120, and cover plate 120 capping cavity forms resonant cavity 130, and cover plate 120 comprises near the first cover plate 121 of cavity 110 side and the second cover plate 122 away from cavity 110 side.First cover plate 120 is provided with the shaping and resonant column 140 that is that stretch out bottom cavity 110 of integrated punching with it.Resonant column 140 is closed in the one end bottom cavity 110, away from the tubular of the one end open bottom cavity 110.Second cover plate 130 is provided with tuning screw 150, and tuning screw 150 to stretch in resonant column 140 and abuts resonant column 140 blind end end face.
Tuning screw 150 is arranged with tuning nut 160 away from one end of cavity 110, is provided with pad 170 between tuning nut 160 and the second cover plate 122.
Rotate forward tuning screw 150, tuning screw 150 moves bottom cavity 110, resonant column 140 blind end end face moves under the responsive to axial force of tuning screw 150 bottom cavity 110, thus the distance between reducing bottom resonant column 140 blind end end face and cavity 110, and then regulate the electric capacity between resonant column and cavity bottom.Reverse rotation tuning screw 150, tuning screw 150 moves towards cover plate 120 direction, resonant column 140 resets under the effect of natural resiliency, thus the distance between increasing bottom resonant column 140 blind end end face and cavity 110, and then regulate the electric capacity between resonant column and cavity bottom.When tuning screw 150 rotates to precalculated position, sheathed pad 170 and tuning nut 160 successively on tuning screw 150, rotary tuning nut 160, is locked at tuning screw 150 on second cover plate 122.
First cover plate 121 upper punch is pressed with the reinforcement (not shown) connecting adjacent resonant column 140, to increase the intensity of coupling between adjacent resonant column 140.The side that first cover plate 121 faces cavity 110 is electroplate with the metal level (not shown) as electromagnetic wave good conductor, is such as independent layers of copper, or re-plating silver layer in layers of copper, or layers of copper re-plating tin layers.
The manufactured materials of cavity 110 is that intensity is high and the aluminium alloy that quality is light.Being manufactured by the material that variations in temperature is little by volume of first cover plate 121 and resonant column 140, such as 45 steel or steel rolling.The thickness of 45 steel or steel rolling will be chosen as existing enough elasticity also also will will have enough intensity.
Second cover plate 122 can adopt metal material to make, such as aluminium alloy.But consider that the function of cover plate propagation of electromagnetic waves is realized by the first cover plate 121, consider from cost angle, the second cover plate 122 also can be made by employing nonmetallic materials, such as pcb board material or plastic sheet.Same, tuning screw 150 can equally adopt metal material manufacture with prior art.The cavity body filter of prior art is that the degree of depth by regulating tuning screw to stretch into resonant column changes dielectric constant between resonant column and cover plate, to change the electric capacity between resonant column and cover plate, and then changes the frequency of cavity body filter.And the cavity body filter of the present embodiment distance that to be distance by regulating tuning screw to go deep into resonant column change between resonant column and cavity bottom, to change the electric capacity between resonant column and cavity bottom, and then change the frequency of cavity body filter.Namely the cavity body filter of the present embodiment does not need to produce capacitive coupling between tuning screw and cavity or resonant column, therefore considers from cost angle, and the present embodiment tuning screw 150 is preferably and adopts nonmetallic materials manufacture, such as plastic sheet or pcb board material.
Adopt the cavity body filter that provides of the present embodiment, resonant column is one-body molded with the first cover plate, and thus resonant column can adopt the different high temperature with cavity to waft stability material manufacture, thus the temperature that can improve cavity body filter floats stability.And first cover plate be only one flat plate, simply too much relative to structure cavity, the mould structure accordingly for punching press resonant column and the first cover plate also can become simpler.In addition, because tuning screw is positioned at outside the resonant cavity that the first cover plate capping cavity formed, around electromagnetic field is not had, thus can not point discharge, also can not produce power sparking.
Embodiment two
Fig. 5 is the structural representation of the duplexer of the utility model embodiment.As shown in Figure 5, duplexer 50 comprises receiving filter 51 and emission filter 52, receiving filter 51 is connected between receiving terminal 53 and antenna terminal 54, emission filter 52 is connected to and sends between terminal 55 and antenna terminal 53, wherein, receiving filter 51 and emission filter 52 are the arbitrary cavity body filter in Fig. 1-Fig. 4.
Embodiment three
Fig. 6 is the structural representation of the radio frequency remote equipment of the utility model embodiment.As shown in Figure 6, radio frequency remote equipment 60 comprises radio frequency transceiver module 61, power amplifier module 62, power module 63 and aforesaid duplexer 60, and radio frequency transceiver module 61 is connected with power amplifier module 62, and power amplifier module 62 is connected with duplexer 50.Each part that power module 63 is radio frequency remote equipment 60 provides power supply.
Apply specific case herein to set forth the utility model principle and execution mode, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a cavity body filter, is characterized in that, comprises cavity and cover plate, and described cover plate capping cavity forms resonant cavity, and described cover plate comprises near the first cover plate of described cavity side and the second cover plate away from described cavity side;
Described first cover plate is provided with the shaping and resonant column that is that stretch out to cavity bottom of integrated punching with it, and described resonant column is closed in the one end near cavity bottom, away from the tubular of the one end open of cavity bottom;
Described second cover plate is provided with tuning screw, and described tuning screw to stretch in described resonant column and abuts described resonant column blind end end face.
2. cavity body filter according to claim 1, is characterized in that, described first cover plate upper punch is pressed with the reinforcement connecting adjacent resonant column.
3. cavity body filter according to claim 1, is characterized in that, the side that described first cover plate faces described cavity is electroplate with the metal level as electromagnetic wave good conductor.
4. cavity body filter according to claim 1, is characterized in that, the manufactured materials of described first cover plate and resonant column is 45 steel or steel rolling.
5. the cavity body filter according to claims 1 to 3 any one, is characterized in that, described second cover plate is nonmetal cover plate.
6. the cavity body filter according to claims 1 to 3 any one, is characterized in that, described tuning screw is nonmetal tuning screw.
7. the cavity body filter according to claims 1 to 3 any one, is characterized in that, described cavity is aluminium alloy cavity.
8. the cavity body filter according to claims 1 to 3 any one, is characterized in that, described tuning screw is arranged with tuning nut away from described cavity one end, is provided with pad between described tuning nut and the second cover plate.
9. a duplexer, comprise receiving filter and emission filter, described receiving filter is connected between receiving terminal and antenna terminal, described emission filter is connected to and sends between terminal and described antenna terminal, it is characterized in that, described receiving filter and emission filter are the cavity body filter described in claim 1 to 8 any one.
10. a radio frequency remote equipment, is characterized in that: comprise radio-frequency (RF) transceiver module, power amplifier module and duplexer according to claim 9, and described radio-frequency (RF) transceiver module is connected with described power amplifier module, and described power amplifier module is connected with described duplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520229202.3U CN204706616U (en) | 2015-04-16 | 2015-04-16 | Cavity body filter, duplexer and radio frequency remote equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520229202.3U CN204706616U (en) | 2015-04-16 | 2015-04-16 | Cavity body filter, duplexer and radio frequency remote equipment |
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| CN204706616U true CN204706616U (en) | 2015-10-14 |
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| CN201520229202.3U Active CN204706616U (en) | 2015-04-16 | 2015-04-16 | Cavity body filter, duplexer and radio frequency remote equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159395A (en) * | 2015-04-16 | 2016-11-23 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| CN111987397A (en) * | 2020-07-05 | 2020-11-24 | 苏州诺泰信通讯有限公司 | Flip-chip filter structure |
| CN112072232A (en) * | 2020-08-24 | 2020-12-11 | 安徽蓝讯电子科技有限公司 | Cavity filter and communication radio frequency equipment |
| CN113285193A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Zero-point adjustable frequency hopping filter |
| US11108122B2 (en) | 2017-01-18 | 2021-08-31 | Huawei Technologies Co., Ltd. | TM mode dielectric resonator including a resonant dielectric rod soldered to a fixing base within a housing baseplate, for forming a filter and a communications device |
-
2015
- 2015-04-16 CN CN201520229202.3U patent/CN204706616U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159395A (en) * | 2015-04-16 | 2016-11-23 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
| US11108122B2 (en) | 2017-01-18 | 2021-08-31 | Huawei Technologies Co., Ltd. | TM mode dielectric resonator including a resonant dielectric rod soldered to a fixing base within a housing baseplate, for forming a filter and a communications device |
| CN111987397A (en) * | 2020-07-05 | 2020-11-24 | 苏州诺泰信通讯有限公司 | Flip-chip filter structure |
| CN112072232A (en) * | 2020-08-24 | 2020-12-11 | 安徽蓝讯电子科技有限公司 | Cavity filter and communication radio frequency equipment |
| CN113285193A (en) * | 2021-04-20 | 2021-08-20 | 武汉德威斯电子技术有限公司 | Zero-point adjustable frequency hopping filter |
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