CN102593560B - Cavity filter and power amplifier module - Google Patents
Cavity filter and power amplifier module Download PDFInfo
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- CN102593560B CN102593560B CN201210069861.6A CN201210069861A CN102593560B CN 102593560 B CN102593560 B CN 102593560B CN 201210069861 A CN201210069861 A CN 201210069861A CN 102593560 B CN102593560 B CN 102593560B
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Abstract
The invention discloses a cavity filter, which comprises a cavity, a cover plate and a connector inner conductor which is arranged in the cavity, wherein the connector inner conductor passes through the cover plate to be connected with an external power amplifier board, and comprises a first inner conductor and a second inner conductor; the first inner conductor is connected with a signal transmission point on the external power amplifier board; the second inner conductor is connected with an internal signal transmission point in the cavity; the first inner conductor and the second inner conductor are in clearance fit to form a structural capacitor; and the internal signal transmission point is connected with the signal transmission point on the external power amplifier board through the structural capacitor. By the cavity filter and a power amplifier module, an improvement scheme is provided for a connecting mode of the power amplifier board and the connector inner conductor, a relative position error between the connector inner conductor and the signal transmission point of the power amplifier board can be eliminated, and good contact between the connector inner conductor and the signal transmission point of the external power amplifier board of the cavity filter can be guaranteed.
Description
Technical field
The embodiment of the present invention relates to communication technical field, and particularly the connected mode of connector inner wire and outside power board in cavity body filter, also relates to a kind of power amplifier module.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, because cavity body filter is to the particular/special requirement of signal transmission, between its each assembly and and joint outer part between interconnective precision require higher.
Refer to Fig. 1, Fig. 1 shows the schematic partial cross-sectional view of a kind of cavity body filter in prior art, which shows also the outside power board that part is connected with cavity body filter.
As shown in Figure 1, this cavity body filter comprises cavity 100, cover plate 110, connector outer conductor 120 and connector inner wire 130.
Cover plate 110 capping cavity 100 briefly.Connector outer conductor 120 is connected with cover plate 110, connector inner wire 130 is located at outside connector and is led in 120 bodies, and connector inner wire 130 is through cover plate 110, be connected with the signal transfer point of the outside power board 150 of cavity body filter, generally, connector outer conductor 120 and connector inner wire 130 adopt coaxial design, form the structure of signal transmission.Connector outer conductor 120 is provided with conduction insulation rubber 124 further, for preventing leakage signal.
To in the research and practice process of prior art, the present inventor finds, in above-mentioned prior art: inner wire 130 and power board 150 are owing to manufacturing and directional error, when the height of inner wire 130 is lower than assembling base plane, usually gap h can be there is, power board can be made after inner wire is connected with power board to produce distortion, and when the height of inner wire 130 is higher than assembling base plane, then power board 150 jack-up can may be made equally power board produce distortion, good contact between the signal transfer point that can not ensure the outside power board 150 of connector inner wire 130 and cavity body filter.
Summary of the invention
In order to solve the defect causing power board to be out of shape when inner wire is connected with power board in prior art, the invention provides a kind of cavity body filter and power amplifier module, can well problems of the prior art be solved.
The invention provides a kind of cavity body filter, comprise cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with outside power board through described cover plate, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described outside power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described internal signal transmission point is connected with the transmission point signal on described outside power board by described structure capacitive.
The invention provides a kind of cavity body filter, comprise cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with outside power board through described cavity, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described outside power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described internal signal transmission point is connected with the transmission point signal on described outside power board by described structure capacitive.
The present invention also provides a kind of power amplifier module, comprise cavity body filter and power board, described cavity body filter comprises cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with power board through described cover plate, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described internal signal transmission point is connected with the transmission point signal on described power board by described structure capacitive.
The cavity body filter pin that the embodiment of the present invention provides and the connected mode of power amplifier module to power board and connector inner wire propose improvement project, the relative position error between connector inner wire and the signal transfer point of power board can be eliminated, good contact between the signal transfer point that can ensure the outside power board of connector inner wire and cavity body filter.Connector inner wire is divided into connector first inner wire and the second inner wire by the present invention, structure capacitive is formed by gap between first inner wire and the second inner wire, substantially increase the connection reliability of connector inner wire and power board in cavity body filter, not fragile power board, and signal good communication can be ensured.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, 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 is the partial cross-sectional cut-away view that in prior art, a kind of cavity body filter is connected with power board;
Fig. 2 is the partial cross-sectional cut-away view that a kind of cavity body filter in the embodiment of the present invention is connected with power board;
Fig. 3 is the partial cross-sectional cut-away view that the another kind of cavity body filter in the embodiment of the present invention is connected with power board;
Fig. 4 is the partial cross-sectional cut-away view that another cavity body filter in the embodiment of the present invention is connected with power board;
Fig. 5 is frequency-time delay figure that in prior art, signal is transferred to cavity by inner wire from power board;
Fig. 6 is embodiment of the present invention signal is transferred to cavity by inner wire frequency-time delay figure from power board.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one,
A kind of cavity body filter, as shown in Figure 2, comprise cavity 200, cover plate 210 and the connector inner wire 230 be located in described cavity, described connector inner wire 230 is connected with outside power board 250 through described cover plate 210, described connector inner wire 230 comprises the first inner wire 2301 and the second inner wire 2302, described first inner wire 2301 is connected with described outside power board 250, described second inner wire 2302 is connected with cavity 200, described first inner wire 2301 and described second inner wire 2302 matched in clearance form structure capacitive, described internal signal transmission point is connected with the transmission point signal on described outside power board 250 by described structure capacitive.
Described cover plate 210 capping cavity 200.Connector outer conductor 220 is connected with cover plate 210, connector inner wire 230 is located at outside connector and is led in 220 bodies, and connector inner wire 230 is through cover plate 110, be connected with the outside power board 250 of cavity body filter, connector outer conductor 220 and connector inner wire 230 adopt coaxial design, form the structure of signal transmission.Connector outer conductor 220 is provided with conduction insulation rubber 224 further, for preventing leakage signal.
Described first inner wire 2301 and described second inner wire 2302 matched in clearance, can make to form structure capacitive between the first inner wire and the second inner wire, make cavity and power board carry out signal transmission by capacity coupled mode further.
Described inside cavity internal signal transmission point can be arranged on the resonant rod on cavity or in cavity, and described second inner wire is connected on cavity or is connected on resonant rod.
Described in a kind of execution mode, the second inner wire 2302 is provided with cavity, described second inner wire 2302 is fixed on cavity, described first inner wire 2301 inserts in the cavity of the second inner wire 2302, described first inner wire 2301 and described second inner wire 2302 matched in clearance.
Described in another kind of execution mode, the second inner wire is provided with cavity, described second inner wire and cavity one-body molded, described first inner wire inserts in the cavity of the second inner wire, described first inner wire and described second inner wire matched in clearance.By adopt the second inner wire and cavity one-body molded, the second inner wire and cavity can be made well to link together, and make manufacture craft more simple and convenient.
Described in another execution mode, the first inner wire is provided with cavity, and described second inner wire inserts in the cavity of the first inner wire, described first inner wire and described second inner wire matched in clearance, described first inner wire and described second inner wire matched in clearance.
Described second inner wire can also be connected on resonant rod, for making signal transmission between power board and resonant rod.
Described first inner wire 2301 is linked together by bolt 260 with described outside power board 250.As Fig. 3, described first inner wire 2301 can also be connected by welding manner with described outside power board 250; As shown in Figure 4, described first inner wire 2301 can also be connected by nut 270 with described outside power board 250.
Hard link inner wire in original technical scheme is split into the first inner wire and the second inner wire by the embodiment of the present invention, first the second inner wire is assemblied on cavity, then the first inner wire is assembled, first inner wire and power board are passed through screw, nut or be welded to connect, because the first inner wire and the second inner wire adopt matched in clearance, so the first inner wire and the second inner wire can have relative movement among a small circle at axial direction, gap between the first inner wire and power board or interference is eliminated by this movement among a small circle, simultaneously, electric capacity is formed between first inner wire and the second inner wire, the capacity coupled mode that passes through of signal is transmitted.
The cavity body filter that the embodiment of the present invention provides proposes improvement project for the connected mode of power board and connector inner wire, the relative position error between connector inner wire and the signal transfer point of power board can be eliminated, good contact between the signal transfer point that can ensure the outside power board of connector inner wire and cavity body filter.Connector inner wire is divided into connector first inner wire and the second inner wire by the present invention, structure capacitive is formed by gap between first inner wire and the second inner wire, substantially increase the connection reliability of connector inner wire and power board in cavity body filter, not fragile power board, and signal good communication can be ensured.
Further, be provided with dielectric 2303 between described first inner wire 2301 and described second inner wire 2302, described first inner wire, the second inner wire and described dielectric form structure capacitive.Described dielectric is positioned on the first inner wire or the second inner wire, and described dielectric can be added by machine, the mode such as injection moulding or surface spraying is arranged on the first inner wire or the second inner wire.Described dielectric can be any insulating material, is preferably PTFE (polytetrafluoroethylene) material.
And the power board of signal transmission is provided with final stage output capacitance between cavity, the structure capacitive formed between described first inner wire and the second inner wire can replace the final stage output capacitance on power board, the structure capacitive formed between described first inner wire and the second inner wire can adjust according to the size of frequency, such as change the length of the first inner wire and the second inner wire, size or thickness, or change the material etc. of dielectric.
Illustrate that structure inner wire being divided into the first inner wire and the second inner wire formation structure capacitive is on the impact of Signal transmissions according to concrete emulation experiment below.
As shown in Figure 5, for signal in prior art to be transferred to the frequency-time delay figure of cavity by inner wire from power board, as we know from the figure, transverse axis is frequency values, and the longitudinal axis is decay time, and when frequency values is 2.59GHZ, time delay value is 11.22ns to the maximum.
As shown in Figure 6, for embodiment of the present invention signal to be transferred to the frequency-time delay figure of cavity by the first inner wire, structure capacitive and the second inner wire from power board, as we know from the figure, transverse axis is frequency values, the longitudinal axis is decay time, and when frequency values is 2.59GHZ, time delay value is 11.66ns to the maximum.
From above-mentioned the simulation experiment result, the gap of the time delay value of the embodiment of the present invention and prior art is 0.44ns, and in the Signal transmissions of filter, negligible within 1ns by the signal time delay value of inner wire, the Signal transmissions in cavity is not affected.
Inner wire is divided into the first inner wire and the second inner wire by the embodiment of the present invention, and dielectric is provided with between described first inner wire and described second inner wire, make described first inner wire, second inner wire and described dielectric form structure capacitive, eliminate the relative position error between connector inner wire and the signal transfer point of power board, good contact between the signal transfer point that can ensure the outside power board of connector inner wire and cavity body filter, and the final stage output capacitance that can substitute on original power board, the cost of manufacture of the power board reduced, do not affect the laser propagation effect of signal simultaneously.
Cavity body filter in the present embodiment can be the frequency-selecting equipment such as duplexer, mixer, tower amplifier.
Embodiment two,
A kind of cavity body filter, comprise cavity, cover plate and the connector inner wire be located in described cavity, described connector inner wire is connected with outside power board through described cavity, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described outside power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive, described internal signal transmission point is connected with the transmission point signal on described outside power board by described structure capacitive.
Described first inner wire and described second inner wire matched in clearance, can make to form structure capacitive between the first inner wire and the second inner wire, makes cavity and power board carry out signal transmission by capacity coupled mode further.
Described cavity adopts inverted form, cover plate is positioned at the below of cavity, cavity bottom is provided with the hole passed for inner wire, described inside cavity internal signal transmission point can be arranged on the resonant rod on cavity or in cavity or on cover plate, and described second inner wire is connected on cavity or is connected on resonant rod or on cover plate.
Described in a kind of execution mode, the second inner wire is provided with cavity, and described second inner wire 2302 is fixed on cavity, and described first inner wire inserts in the cavity of the second inner wire, described first inner wire and described second inner wire matched in clearance.
Described in another kind of execution mode, the second inner wire is provided with cavity, described second inner wire and cavity one-body molded, described first inner wire inserts in the cavity of the second inner wire, described first inner wire and described second inner wire matched in clearance.By adopt the second inner wire and cavity one-body molded, the second inner wire and cavity can be made well to link together, and make manufacture craft more simple and convenient.
Described in another execution mode, the first inner wire is provided with cavity, and described second inner wire inserts in the cavity of the first inner wire, described first inner wire and described second inner wire matched in clearance, described first inner wire and described second inner wire matched in clearance.
Described second inner wire can also be connected on resonant rod, for making signal transmission between power board and resonant rod.
The cavity body filter that the embodiment of the present invention provides proposes improvement project for the connected mode of power board and connector inner wire, the relative position error between connector inner wire and the signal transfer point of power board can be eliminated, good contact between the signal transfer point that can ensure the outside power board of connector inner wire and cavity body filter.Connector inner wire is divided into connector first inner wire and the second inner wire by the present invention, structure capacitive is formed by gap between first inner wire and the second inner wire, substantially increase the connection reliability of connector inner wire and power board in cavity body filter, not fragile power board, and signal good communication can be ensured.
Embodiment three,
A kind of power amplifier module, comprise cavity body filter and power board, described cavity body filter comprises cavity, cover plate and the connector inner wire be located in described cavity, described connector inner wire is connected with power board through described cover plate, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive, described internal signal transmission point is connected with the transmission point signal on described power board by described structure capacitive.
A kind of execution mode, described structure capacitive replaces the final stage output capacitance on described power board, for filtering signal transmission.By arranging suitable length and spacing to the first inner wire and the second inner wire, and suitable material is chosen as polytetrafluoroethylene to dielectric, the structure capacitive that formed between the first inner wire and the second inner wire can be made to replace original final stage output capacitance on power board, namely eliminate the relative position error between connector inner wire and the signal transfer point of power board, additionally reduce the cost of manufacture of power board.
Another kind of execution mode, described power board is provided with final stage output capacitance, and described final stage output capacitance is used for filtering signal transmission.In present embodiment, the first inner wire and the second inner wire matched in clearance form structure capacitive, only for transmitting the signal entering cavity, eliminate the relative position error between connector inner wire and the signal transfer point of power board.
Another execution mode, described power board is provided with final stage output capacitance, and described final stage output capacitance is mated for filtering signal transmission mutually with described structure capacitive.In present embodiment, first inner wire and the second inner wire matched in clearance form structure capacitive, the final stage output capacitance on structure capacitive and power board is adopted to mate, due to final stage output capacitance costly, the electric capacity that price can be adopted to offset replaces final stage output capacitance, namely eliminate the relative position error between connector inner wire and the signal transfer point of power board, additionally reduce the cost of manufacture of power board.
Inner wire is divided into the first inner wire and the second inner wire by the embodiment of the present invention, and dielectric is provided with between described first inner wire and described second inner wire, make described first inner wire, second inner wire and described dielectric form structure capacitive, eliminate the relative position error between connector inner wire and the signal transfer point of power board, good contact between the signal transfer point that can ensure the outside power board of connector inner wire and cavity body filter, and the final stage output capacitance that can substitute on original power board, the cost of manufacture of the power board reduced, do not affect the laser propagation effect of signal simultaneously.
Apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a cavity body filter, it is characterized in that: comprise cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with outside power board through described cover plate, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described outside power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described first inner wire and described second inner wire are coaxially arranged, described internal signal transmission point is connected with the transmission point signal on described outside power board by described structure capacitive.
2. cavity body filter according to claim 1, it is characterized in that: described second inner wire is provided with cavity, in the cavity that described first inner wire inserts the second inner wire or described first inner wire be provided with cavity, described second inner wire inserts in the cavity of the first inner wire.
3. cavity body filter according to claim 1, is characterized in that: described second inner wire is connected on cavity or is connected on resonant rod.
4. cavity body filter according to claim 3, is characterized in that: described second inner wire and cavity one-body molded.
5. the cavity body filter according to Claims 1-4 any one, it is characterized in that: be provided with dielectric in the gap between described first inner wire and described second inner wire, described first inner wire, the second inner wire and described dielectric form structure capacitive.
6. the cavity body filter according to Claims 1-4 any one, is characterized in that: described first inner wire and described outside power board are by riveting, crimping, be socketed, weld or threaded connection mode is connected.
7. a cavity body filter, it is characterized in that: comprise cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with outside power board through described cavity, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described outside power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described first inner wire and described second inner wire are coaxially arranged, described internal signal transmission point is connected with the transmission point signal on described outside power board by described structure capacitive.
8. a power amplifier module, it is characterized in that: comprise cavity body filter and power board, described cavity body filter comprises cavity, cover plate and the connector inner wire be located in described cavity, described cover plate capping cavity, described connector inner wire is connected with power board through described cover plate, described connector inner wire comprises the first inner wire and the second inner wire, described first inner wire is connected with the transmission point signal on described power board, described second inner wire is connected with the internal signal transmission point in cavity, described first inner wire and described second inner wire matched in clearance form structure capacitive and make described first inner wire and described second inner wire can carry out axial relative movement to eliminate the relative position error between connector inner wire and the transmission point signal of power board, described first inner wire and described second inner wire are coaxially arranged, described internal signal transmission point is connected with the transmission point signal on described power board by described structure capacitive.
9. power amplifier module according to claim 8, is characterized in that: described structure capacitive replaces the final stage output capacitance on described power board, for filtering signal transmission.
10. power amplifier module according to claim 8, is characterized in that: described power board is provided with final stage output capacitance, and described final stage output capacitance is used for filtering signal transmission.
11. power amplifier modules according to claim 8, is characterized in that: described power board is provided with final stage output capacitance, and described final stage output capacitance is mated for filtering signal transmission mutually with described structure capacitive.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069861.6A CN102593560B (en) | 2012-03-16 | 2012-03-16 | Cavity filter and power amplifier module |
| PCT/CN2013/072757 WO2013135206A1 (en) | 2012-03-16 | 2013-03-15 | Cavity filter, power amplifier module, and signal transceiver device |
| US14/385,771 US9503037B2 (en) | 2012-03-16 | 2013-03-15 | Cavity filter, power amplifying module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069861.6A CN102593560B (en) | 2012-03-16 | 2012-03-16 | Cavity filter and power amplifier module |
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| Publication Number | Publication Date |
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| CN102593560A CN102593560A (en) | 2012-07-18 |
| CN102593560B true CN102593560B (en) | 2015-03-18 |
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| CN201210069861.6A Active CN102593560B (en) | 2012-03-16 | 2012-03-16 | Cavity filter and power amplifier module |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9503037B2 (en) | 2012-03-16 | 2016-11-22 | Shenzhen Tatfook Technology Co., Ltd. | Cavity filter, power amplifying module |
| CN104364962B (en) * | 2013-06-04 | 2019-06-21 | 华为技术有限公司 | Dielectric resonator, dielectric filter, transceiver and base station using it |
| WO2016106668A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市大富科技股份有限公司 | Structural capacitor and filter |
| CN107546553B (en) * | 2016-06-29 | 2020-03-27 | 中兴通讯股份有限公司 | Connector and apparatus |
| CN106998193B (en) * | 2017-04-06 | 2020-12-22 | 上海航天测控通信研究所 | S-band relay power amplifier filter integrated structure |
| CN110311197A (en) * | 2019-07-16 | 2019-10-08 | 深圳市威富通讯技术有限公司 | Low-pass filter with transmission zero |
| CN112952335B (en) * | 2021-01-29 | 2022-03-29 | 盐城东山通信技术有限公司 | Coupling assembly, coupler, filter and communication radio frequency equipment |
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| CN102074774A (en) * | 2010-12-22 | 2011-05-25 | 深圳市大富科技股份有限公司 | Radio frequency communication equipment |
| CN102354601A (en) * | 2011-05-20 | 2012-02-15 | 深圳市大富科技股份有限公司 | Structural capacitor, connector and communication equipment using connector |
| CN202564513U (en) * | 2012-03-16 | 2012-11-28 | 深圳市大富科技股份有限公司 | Cavity filter and power amplifier module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4502029A (en) * | 1983-02-17 | 1985-02-26 | International Telephone And Telegraph Corporation | Extended resonator electronically tunable band pass filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102074774A (en) * | 2010-12-22 | 2011-05-25 | 深圳市大富科技股份有限公司 | Radio frequency communication equipment |
| CN102354601A (en) * | 2011-05-20 | 2012-02-15 | 深圳市大富科技股份有限公司 | Structural capacitor, connector and communication equipment using connector |
| CN202564513U (en) * | 2012-03-16 | 2012-11-28 | 深圳市大富科技股份有限公司 | Cavity filter and power amplifier module |
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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 Address before: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |