CN109494489B - Filtering integrated base station antenna - Google Patents
Filtering integrated base station antenna Download PDFInfo
- Publication number
- CN109494489B CN109494489B CN201811485201.XA CN201811485201A CN109494489B CN 109494489 B CN109494489 B CN 109494489B CN 201811485201 A CN201811485201 A CN 201811485201A CN 109494489 B CN109494489 B CN 109494489B
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- filter
- pin
- base station
- station antenna
- calibration network
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- 238000001914 filtration Methods 0.000 title abstract description 18
- 239000002184 metal Substances 0.000 claims description 28
- 238000005476 soldering Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Transceivers (AREA)
Abstract
The invention relates to a filtering integrated base station antenna, which comprises a calibration network structure and a plurality of filter structures. The surface of the calibration network structure is provided with a first pin which is respectively and electrically connected with the plurality of signal channels, and each filter structure is formed on the surface of the filter structure and is electrically connected with a second pin of the filter circuit. The calibration network structure and the filter structures are integrated integrally, and the filter structures are attached to the surface of the calibration network structure, so that the structure of the filter integrated base station antenna is more compact. In addition, through the laminating of first pin and second pin, can make a plurality of filter structures realize electrically connecting with corresponding signal path respectively, so need not to additionally adopt connecting elements such as coaxial connector or radio frequency connector, can make between calibration network structure and the filter structure realize signal conduction. Therefore, the structure of the filtering integrated base station antenna is simplified, and the volume and the weight are also obviously reduced, thereby facilitating the miniaturization design of the 5G communication system.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a filtering integrated base station antenna.
Background
In wireless communication and radar systems, both the transmission and reception of information depends on the antenna. As the rapid development of communication systems has advanced into the 5G age, miniaturization of components has become a key to the development of communication devices. The conventional antenna includes an antenna portion (radiating element), a radio frequency filter portion, and an active circuit portion. The existing base station antenna and the rf filter are separately used as a module, and a coaxial connector or an rf connector is generally used to connect the two modules.
The connection mode of the antenna part and the radio frequency filter can be added with at least two coaxial connectors or radio frequency connectors as connection fittings. The 5G MIMO antenna is generally integrated with a plurality of rf channels, and each channel needs to correspond to a set of rf filters. Taking the antenna with 64 channels as an example, if the components continue to be connected in a conventional manner, at least 128 coaxial connectors or rf connectors need to be added, which greatly increases the volume, weight and cost of the base station antenna. Therefore, the existing base station antenna is disadvantageous to miniaturization of the 5G communication system.
Disclosure of Invention
Based on this, it is necessary to provide a filtering integrated base station antenna for the problem that the existing base station antenna is disadvantageous for miniaturization of the 5G communication system.
A filter-integrated base station antenna, comprising:
the calibration network structure comprises a calibration network circuit formed with a plurality of signal channels, and a first pin electrically connected with the signal channels is formed on the surface of the calibration network structure; and
The filter structures are in one-to-one correspondence with the signal channels, and each filter structure is provided with a filter circuit and a second pin which is formed on the surface of the filter structure and is electrically connected with the filter circuit;
the plurality of filter structures are attached to the surface of the calibration network structure, and the second pins of each filter structure are attached to and electrically connected with the corresponding first pins of the signal channel.
In one embodiment, the calibration network structure further includes a metal wall wrapped on an outer surface of the calibration network circuit, and a first annular groove is formed on the metal wall to form the first pin within the range of the first annular groove.
In one embodiment, a metallized blind hole is formed on the surface of the calibration network structure within the first annular groove to electrically connect the first pin with the corresponding signal channel.
In one embodiment, the filter structure comprises a plurality of filters which are arranged in a stacked manner and are coupled with each other, and the second pin is positioned on the surface of any one of the plurality of filters.
In one embodiment, the filter structure comprises a dielectric waveguide filter and a low-pass filter which are arranged in a stacked mode and are coupled with each other, and the second pin is located on the surface of the low-pass filter and is electrically connected with the low-pass filter circuit.
In one embodiment, the low-pass filter includes a metal layer coated on an outer surface of the low-pass filter circuit, and a second annular groove is formed on the metal layer to form the second pin within a range of the second annular groove.
In one embodiment, the low pass filter is a stripline structure.
In one embodiment, the first pin and the second pin are both circular sheet metal structures.
In one embodiment, the second pin of each filter structure is electrically connected to the first pin of the corresponding signal channel by surface-mount soldering.
In one embodiment, the antenna further comprises a plurality of radiating units, and the plurality of radiating units are respectively and electrically connected with the plurality of signal channels in a one-to-one correspondence manner.
Above-mentioned filtering integrated form basic station antenna, calibration network structure and a plurality of filter structure realize integrative integration, and a plurality of filter structures all paste the surface of locating calibration network structure, so filtering integrated form basic station antenna's structure is compacter. In addition, through the laminating of first pin and second pin, can make a plurality of filter structures realize electrically connecting with corresponding signal path respectively, so need not to additionally adopt connecting elements such as coaxial connector or radio frequency connector, can make between calibration network structure and the filter structure realize signal conduction. Therefore, the structure of the filtering integrated base station antenna is simplified, and the volume and the weight are also obviously reduced, thereby facilitating the miniaturization design of the 5G communication system.
Drawings
Fig. 1 is a schematic diagram of a filtering integrated base station antenna according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of a calibration network structure in the filtering integrated base station antenna shown in fig. 1;
fig. 3 is a schematic diagram of a low-pass filter in the filtering integrated base station antenna shown in fig. 1.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a filter-integrated base station antenna 100 according to a preferred embodiment of the present invention includes a calibration network structure 110 and a filter structure 120.
Referring to fig. 2, the calibration network structure 110 includes a calibration network circuit (not shown) for calibrating each signal of the filter-integrated base station antenna 100. The calibration network structure 110 is generally integrated in the front end of the antenna system, and since the above-mentioned filter-integrated base station antenna 100 is generally a MASSIVE MIMO antenna applied to the 5G communication system. Thus, the calibration network circuit is formed with a plurality of signal channels (not shown). Each signal path in the calibration network structure 110 corresponds to one antenna path in the filter-integrated base station antenna 100.
In this embodiment, the integrated-filter base station antenna 100 further includes a plurality of radiating elements (not shown), and the plurality of radiating elements are electrically connected to the plurality of signal channels in a one-to-one correspondence manner.
The plurality of radiating elements are used to implement multiple inputs and multiple outputs of the filter-integrated base station antenna 100, and each radiating element can radiate and receive low-frequency or high-frequency signals separately. The plurality of radiation units are generally mounted on a reflection plate (not shown) by welding, clamping, or the like. Wherein each radiating element forms an antenna channel with a corresponding signal channel in the calibration network structure 110.
The calibration network circuit may be a strip line, a microstrip line or a PCB circuit board structure. In particular, in the present embodiment, the calibration network structure 110 further includes a metal wall 111 wrapping the outer surface of the calibration network circuit. The metal wall 111 may be coated on the outer surface of the calibration network circuit in a film plating manner, and may function as a shielding case.
In addition, the surface of the calibration network structure 110 is formed with first pins 113 electrically connected to the plurality of signal channels, respectively. The first pins 113 are plural, and each signal channel is led out to the surface of the calibration network structure 110 through at least one corresponding first pin 113. The first pins 113 may be located at any position on the surface of the calibration network structure 110, and may be circular, square, irregular, or the like.
The first pins 113 are insulated from the metal wall 111. In the present embodiment, the metal wall 111 is provided with a first annular groove 1112 to form the first pin 113 within the first annular groove 1112. The first annular groove 1112 isolates the metal wall 111 from the first pin 113.
Specifically, the first annular groove 1112 and the first pin 113 may be obtained by etching the metal wall 111 in an annular shape, and insulation between the first pin 113 and the metal wall 111 may be achieved. Moreover, the resulting first pins 113 are flush with other areas of the metal wall 111, avoiding protruding from the surface of the alignment network structure 110. Therefore, the process of fabricating the first pin 113 is simple and no other components need to be introduced, thereby facilitating the miniaturized design of the calibration network structure 110.
Further, in the present embodiment, a metallized blind hole 115 is formed on the surface of the calibration network structure 110 within the first annular groove 1112 to electrically connect the first pin 113 with the corresponding signal channel.
Specifically, by drilling holes in the surface of the calibration network structure 110, refilling with liquid metal and solidifying, a metalized blind via 115 connecting the first pin 113 and the corresponding signal channel can be formed. Therefore, no additional lead is needed, which further facilitates miniaturization of the calibration network structure 110.
Referring to fig. 3, the number of the filter structures 120 is plural, and the plurality of filter structures 120 corresponds to the plurality of signal channels one by one. The filter structure 120 may perform functions such as frequency selection, low pass filtering, high pass filtering, band pass filtering, etc. In particular in this embodiment, the filter structure 120 comprises a plurality of filters arranged in a stack and coupled to each other. Each filter may perform a frequency selection, low pass, high pass, or band pass function, respectively, thereby providing the filter structure 120 with a combination of functions.
Each of the filter structures 120 has a filter circuit (not shown) and a second pin 121 formed on a surface of the filter structure 120 and electrically connected to the filter circuit. The second pins 121 may be located at any position on the surface of the filter structure 120, and may be circular, square, irregular, or the like. In this embodiment, the second pin 121 is located on a surface of any one of the plurality of filters and is electrically connected to a filter circuit of the filter. The first pins 121 may be electrically connected to the corresponding filter circuits by electrically connecting the first pins 113 to the signal channels.
Further, in the present embodiment, the filter structure 120 includes a dielectric waveguide filter 123 and a low-pass filter 125 that are stacked and coupled to each other, and the second pin 121 is located on the surface of the low-pass filter 125 and is electrically connected to a low-pass filter circuit (not shown).
The dielectric waveguide filter 123 performs a frequency selection function of the signal, and the low-pass filter 125 performs a broadband suppression function outside the dielectric waveguide filter 123. Dielectric waveguide filter 123 is typically fabricated from a ceramic dielectric material having a relatively high relative permittivity. Therefore, the filter structure 120 can eliminate the interference at the far end, and has advantages of miniaturization and light weight. The low pass filter 125 in this embodiment is a stripline structure.
Further, in the present embodiment, the low-pass filter 125 includes a metal layer 1251 that is wrapped around an outer surface of the low-pass filter circuit (not shown). The metal layer 1251 is provided with a second annular groove 1252 to form the second pin 121 within the second annular groove 1252.
Similarly, the second pin 121 is insulated from the metal layer 1251, and the second annular groove 1252 serves to isolate the metal layer 1251 from the second pin 121. Specifically, the second annular groove 1252 and the second pin 121 may be obtained by performing annular etching on the metal layer 1251, and insulation of the metal layer 1251 is required for the second pin 121. Moreover, the resulting second pins 121 are flush with other areas of the metal layer 1251, avoiding protruding from the surface of the low-pass filter 125. Therefore, the process of manufacturing the second pin 121 is simple and no other components need to be introduced, thereby facilitating the miniaturized design of the filter structure 120.
The plurality of filter structures 120 are electrically connected to the plurality of signal paths in the calibration network structure 110, respectively. Therefore, the electric signals sent by the signal transceiver in the communication base station can be conducted to the calibration network 110 after being filtered, and finally are respectively coupled to the radiation units of the antenna channels by the signal channels, so that the electromagnetic wave signals are emitted.
The plurality of filter structures 120 are attached to the surface of the calibration network structure 110, and the second pins 121 of each filter structure 120 are attached to and electrically connected with the first pins 113 of the corresponding signal channels.
Because the plurality of filter structures 120 are attached to the surface of the calibration network structure 110, the fit between the filter structures 120 and the calibration network structure 110 can be made more compact. In addition, through the bonding 121 between the first pin 113 and the second pin, the plurality of filter structures 120 can be electrically connected with the corresponding signal channels, so that no additional connecting elements such as a coaxial connector or a radio frequency connector are needed, and signal conduction between the calibration network structure 110 and the filter structures 120 can be realized, thereby reducing the volume and weight of the filter integrated base station antenna 100 and reducing the cost.
Moreover, by directly connecting the filter structure 120 with the calibration network structure 110, overall loss can be reduced, and overall consistency can be improved.
As shown in fig. 2 and 3, each signal channel corresponds to two first pins 113 isolated from each other, and each filter structure 120 has two second pins 121 isolated from each other. When the two first pins 113 and the two second pins 121 are bonded, the two first pins are respectively butted with each other, and correspond to an inner conductor and an outer conductor of the coaxial connector respectively. It should be noted that, the functions of the two first pins 113 and the two second pins 121 may be concentrated in the first pins 113 and the second pins 121, respectively.
In this embodiment, the second pin 121 of each filter structure 120 is electrically connected to the first pin 113 of the corresponding signal channel through surface mount soldering. Through the surface mount welding, the filter structure 120 and the calibration network structure 110 can be matched compactly, and the device has the advantages of small volume, vibration resistance, impact resistance and the like, so that the device is high in batch consistency and can be assembled in batches, working hours are reduced, and efficiency is improved.
In this embodiment, the first pins 113 and the second pins 121 are both circular metal sheet structures. Specifically, the sheet structure can make the first pins 113 and the second pins 121 in surface contact when in contact, so that the contact area is large, thereby being beneficial to improving the reliability of electrical connection. In addition, the circular structure is beneficial to aligning the first pins 113 with the corresponding second pins 121, so that the angle does not need to be accurately adjusted, and the assembly efficiency is further improved.
The above-mentioned integrated base station antenna 100 with filtering, the calibration network structure 110 and the plurality of filter structures 120 are integrated, and the plurality of filter structures 120 are attached to the surface of the calibration network structure 110, so the integrated base station antenna 100 with filtering has a more compact structure. In addition, the first pins 113 are attached to the second pins 121, so that the plurality of filter structures 120 can be electrically connected to the corresponding signal channels, and signal transmission between the calibration network structure 110 and the filter structures 120 can be achieved without using additional connection elements such as coaxial connectors or radio frequency connectors. Therefore, the structure of the filtering integrated base station antenna 100 is simplified, and the volume and weight are also significantly reduced, thereby facilitating the miniaturization design of the 5G communication system.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A filter-integrated base station antenna, comprising:
the calibration network structure comprises a calibration network circuit formed with a plurality of signal channels, and a first pin electrically connected with the signal channels is formed on the surface of the calibration network structure; and
The filter structures are in one-to-one correspondence with the signal channels, and each filter structure is provided with a filter circuit and a second pin which is formed on the surface of the filter structure and is electrically connected with the filter circuit;
the plurality of filter structures are attached to the surface of the calibration network structure, and the second pin of each filter structure is attached to and electrically connected with the first pin of the corresponding signal channel;
the filter structure comprises a dielectric waveguide filter and a low-pass filter which are arranged in a stacked mode and are mutually coupled, and the second pin is positioned on the surface of the low-pass filter and is electrically connected with the low-pass filter circuit; the low pass filter is in a strip line structure.
2. The integrated filter base station antenna of claim 1, wherein the calibration network structure further comprises a metal wall covering an outer surface of the calibration network circuit, and a first annular groove is formed in the metal wall to form the first pin within the first annular groove.
3. The filter-integrated base station antenna of claim 2, wherein a surface of the calibration network structure is formed with a metallized blind via within the first annular groove to electrically connect the first pin with the corresponding signal channel.
4. The filter-integrated base station antenna of claim 2, wherein the first pin is insulated from the metal wall.
5. The filter-integrated base station antenna of claim 1, wherein each of the signal paths is routed out to a surface of the calibration network structure through at least one corresponding first pin.
6. The filtering-integrated base station antenna of claim 1, wherein the low-pass filter comprises a metal layer coated on the outer surface of the low-pass filter circuit, and a second annular groove is formed on the metal layer to form the second pin in the range of the second annular groove.
7. The filter-integrated base station antenna of claim 6, wherein the second pin is insulated from the metal layer.
8. The filter-integrated base station antenna of claim 1, wherein the first pin and the second pin are each of a circular sheet metal structure.
9. The filter-integrated base station antenna of claim 1, wherein the second pin of each filter structure is electrically connected to the first pin of the corresponding signal channel by surface mount soldering.
10. The filter-integrated base station antenna of claim 1, further comprising a plurality of radiating elements electrically connected to the plurality of signal channels in a one-to-one correspondence, respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485201.XA CN109494489B (en) | 2018-12-06 | 2018-12-06 | Filtering integrated base station antenna |
| PCT/CN2019/090796 WO2020113925A1 (en) | 2018-12-06 | 2019-06-11 | Filter integrated base station antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485201.XA CN109494489B (en) | 2018-12-06 | 2018-12-06 | Filtering integrated base station antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109494489A CN109494489A (en) | 2019-03-19 |
| CN109494489B true CN109494489B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485201.XA Active CN109494489B (en) | 2018-12-06 | 2018-12-06 | Filtering integrated base station antenna |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109494489B (en) |
| WO (1) | WO2020113925A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494489B (en) * | 2018-12-06 | 2023-09-29 | 京信通信技术(广州)有限公司 | Filtering integrated base station antenna |
| CN112152691B (en) * | 2019-06-28 | 2023-01-31 | 中兴通讯股份有限公司 | Filtering antenna and base station equipment |
| CN110600891A (en) * | 2019-09-03 | 2019-12-20 | 广东博纬通信科技有限公司 | 5G array antenna |
| CN112467365A (en) * | 2019-09-06 | 2021-03-09 | 中兴通讯股份有限公司 | Antenna device and antenna system |
| WO2021237419A1 (en) * | 2020-05-25 | 2021-12-02 | 瑞声声学科技(深圳)有限公司 | Antenna module |
| KR20220012761A (en) * | 2020-07-23 | 2022-02-04 | 삼성전자주식회사 | Antenna filter and electronic device inlcuding the same |
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| JP2012134274A (en) * | 2010-12-21 | 2012-07-12 | Murata Mfg Co Ltd | Three-terminal capacitor packaging structure |
| CN203119068U (en) * | 2013-03-12 | 2013-08-07 | 咸阳振峰电子有限公司 | Fillet welding cavity type shell body for packaging filter |
| WO2016028343A1 (en) * | 2014-04-05 | 2016-02-25 | Cts Corporation | Rf filter assembly with mounting pins |
| CN108832240A (en) * | 2018-06-07 | 2018-11-16 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
| CN209183759U (en) * | 2018-12-06 | 2019-07-30 | 京信通信系统（中国）有限公司 | Filter integrated form antenna for base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101304289A (en) * | 2008-06-30 | 2008-11-12 | 摩比天线技术（深圳）有限公司 | Intelligent antenna calibration network and calibration method |
| EP3066762B1 (en) * | 2013-11-08 | 2018-02-21 | Telefonaktiebolaget LM Ericsson (publ) | Radio unit with internal parallel antenna calibration |
| EP3152842B8 (en) * | 2014-06-04 | 2020-04-08 | Xilinx, Inc. | Modular antenna system |
| CN107706544B (en) * | 2017-09-07 | 2021-01-26 | 广东通宇通讯股份有限公司 | Base station antenna and antenna array module thereof |
| CN109494489B (en) * | 2018-12-06 | 2023-09-29 | 京信通信技术(广州)有限公司 | Filtering integrated base station antenna |
-
2018
- 2018-12-06 CN CN201811485201.XA patent/CN109494489B/en active Active
-
2019
- 2019-06-11 WO PCT/CN2019/090796 patent/WO2020113925A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012134274A (en) * | 2010-12-21 | 2012-07-12 | Murata Mfg Co Ltd | Three-terminal capacitor packaging structure |
| CN203119068U (en) * | 2013-03-12 | 2013-08-07 | 咸阳振峰电子有限公司 | Fillet welding cavity type shell body for packaging filter |
| WO2016028343A1 (en) * | 2014-04-05 | 2016-02-25 | Cts Corporation | Rf filter assembly with mounting pins |
| CN108832240A (en) * | 2018-06-07 | 2018-11-16 | 张家港保税区灿勤科技有限公司 | The dielectric waveguide filter that distal end inhibits can be improved |
| CN209183759U (en) * | 2018-12-06 | 2019-07-30 | 京信通信系统（中国）有限公司 | Filter integrated form antenna for base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109494489A (en) | 2019-03-19 |
| WO2020113925A1 (en) | 2020-06-11 |
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