CN215266663U - BT antenna with filtering function - Google Patents
BT antenna with filtering function Download PDFInfo
- Publication number
- CN215266663U CN215266663U CN202121693650.0U CN202121693650U CN215266663U CN 215266663 U CN215266663 U CN 215266663U CN 202121693650 U CN202121693650 U CN 202121693650U CN 215266663 U CN215266663 U CN 215266663U
- Authority
- CN
- China
- Prior art keywords
- pcb
- antenna
- electrode
- unit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Coils Or Transformers For Communication (AREA)
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a BT antenna with filtering function, which comprises an antenna component with a first signal end and a second signal end, wherein the antenna component comprises a capacitance unit and a spiral inductance unit spirally wound outside the capacitance unit and connected with the capacitance unit in series; one end of the spiral inductance unit is suspended to form a first signal end for signal receiving and signal sending, the other end of the spiral inductance unit is connected with one pole of the capacitance unit in series to form an LC filter structure for signal transmission, and the other pole of the capacitance unit forms a second signal end connected with an external circuit; the integrated arrangement mode of the LC filtering structure and the antenna is adopted, the additional arrangement of the filtering structure is avoided, the size of the antenna assembly is reduced to a great extent, the miniaturization of the antenna is facilitated, the structure is simple, and the strong practicability is achieved.
Description
Technical Field
The utility model relates to a BT antenna technical field especially relates to a BT antenna with filtering capability.
Background
In recent years, with the rapid development of communication technology, antennas are widely used in the fields of electronic countermeasure systems, ultra-wideband radars, satellite communications, and the like, and there is a wide demand for high-speed wireless LANs, home networks, wireless telephones, and the like, particularly for small electronic devices such as mobile phones.
Because the antenna often has interference signals in the process of receiving and transmitting signals, the signals need to be filtered, and the existing method usually adds a filtering structure on an antenna circuit, so that the antenna generally has a larger size, and the requirement of small electronic equipment on the antenna is difficult to meet.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a BT antenna with filtering capability to solve the great problem of antenna size among the prior art.
In order to solve the above problem, the present invention provides a BT antenna with filtering function, comprising an antenna assembly having a first signal end and a second signal end, wherein the antenna assembly comprises a capacitor unit and a spiral inductor unit spirally wound outside the capacitor unit and connected in series with the capacitor unit; one end of the spiral inductance unit is suspended to form a first signal end for signal receiving and signal sending, the other end of the spiral inductance unit is connected with one pole of the capacitance unit in series to form an LC filter structure for signal transmission, and the other pole of the capacitance unit forms a second signal end connected with an external circuit
By adopting the structure, the LC filtering structure formed by connecting the capacitor unit and the spiral inductance unit in series is utilized, the received signal can be filtered, the signal processing difficulty of a post-stage circuit is reduced, and the size of the whole BT antenna can be effectively reduced due to the design of multiplexing the spiral inductance unit and the antenna; in addition, the spiral inductance unit is the heliciform and winds the arrangement mode of establishing in the outside of electric capacity unit, can further the size of whole BT antenna, and simultaneously, spiral winding's mode can improve inductance magnetic flux under relatively less volume in order to increase inductance value, can also reduce vortex current simultaneously.
Furthermore, the capacitor unit comprises a first electrode connected with the spiral inductor unit and a second electrode arranged in parallel with the first electrode and connected with an external circuit.
Further, the first electrode and the second electrode are both unipolar plates.
Further, the first electrode comprises at least two first sub-pole plates which are parallel to each other and connected at one end, the interconnection end of the first sub-pole plates is connected with the spiral inductance unit, the second electrode comprises at least two second sub-pole plates which are parallel to each other and connected at one end, and the interconnection end of the second sub-pole plates is connected with an external circuit; the first sub-pole plates and the second sub-pole plates are in one-to-one correspondence in number and are arranged at intervals to form a capacitor unit in an interdigital structure.
Furthermore, the spiral inductance unit comprises a plurality of first inductors and second inductors which are respectively arranged on two sides of the capacitor unit, the first inductors and the second inductors are distributed along the length direction of the capacitor unit, and the first inductors and the second inductors are sequentially and alternately connected through conduction parts to form a three-dimensional spiral inductance unit wound on the outer side of the capacitor unit.
The inductor further comprises a first PCB, at least one second PCB, at least one third PCB and a fourth PCB, wherein the first PCB, the second PCB, the third PCB and the fourth PCB are stacked from top to bottom, the first inductor and the second inductor are respectively printed on the first PCB and the fourth PCB, and the first electrode and the second electrode are respectively printed on the second PCB and the third PCB.
Furthermore, a first via hole and a plurality of second via holes connected with the first inductor are formed in the first PCB, a third via hole connected with the first electrode is formed in each second PCB, a fourth via hole connected with the second electrode is formed in each third PCB, and a plurality of fifth via holes connected with the second inductor are formed in each fourth PCB; the first via hole is connected with the third via hole, the second via hole is connected with the fifth via hole, the second via hole and the fifth via hole are welded to form the conduction part, and the fourth via hole is connected with an external circuit; and a sixth through hole and a seventh through hole which are connected with the corresponding second through hole and the corresponding fifth through hole are also arranged on the second PCB and the third PCB.
Furthermore, the packaging structure further comprises a packaging layer, wherein a signal pad and a fixed pad are arranged on the packaging layer, and the fourth via hole is connected with an external circuit through the signal pad.
The utility model discloses a design of antenna and LC filtering structure integration carries out filtering to the signal when realizing receiving and dispatching signals, and helical configuration's inductance can not only increase the inductance value and can also reduce the vortex current to whole antenna module all forms through PCB board printing, has effectively reduced the overall size of antenna when guaranteeing antenna performance, is favorable to antenna structure's miniaturization.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the encapsulation layer of the present invention.
Fig. 5 is another schematic structural diagram of a third embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the term "connected" is to be interpreted broadly, for example, it may be mechanically or electrically connected, or it may be connected between two elements, directly or indirectly through an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1, it is a schematic structural diagram of a first embodiment of a BT antenna with filtering function according to the present invention. The BT antenna of the present embodiment includes an antenna assembly 1, the antenna assembly 1 having a first signal terminal for signal reception and signal transmission and a second signal terminal connected to an external circuit. The antenna component 1 comprises a capacitor unit 2 and a spiral inductor unit 3 spirally wound outside the capacitor unit 2 and connected with the capacitor unit in series; one end of the spiral inductance unit 3 is suspended to form the first signal end; the other end of the spiral inductance unit 3 is connected in series with one pole of the capacitance unit 2 to form an LC filter structure for signal transmission, and the other pole of the capacitance unit 2 forms the second signal end. The transmitted signals are filtered through an LC filtering structure formed by the capacitor unit 2 and the spiral inductor unit 3, and the receiving or transmitting of specific frequency signals can be realized; and the LC filter structure is used as a channel for signal transmission, so that the spiral inductance unit 3 and the antenna are multiplexed, and the filter structure is not required to be additionally arranged, thereby being beneficial to reducing the size of the antenna.
The capacitor unit 2 comprises a first electrode 21 and a second electrode 22, wherein the first electrode 21 and the second electrode 22 are parallel to each other, so as to realize the coupling of signals between the two electrodes of the capacitor unit 2. The first electrode 21 is connected to the spiral inductor unit 3, and the second electrode 22 is connected to the external circuit. In the present embodiment, the first electrode 21 and the second electrode 22 are unipolar plates.
Spiral inductance unit 3 includes that a plurality of branch establish at the first inductance 31 and the second inductance 32 of electric capacity unit 2 both sides, first inductance 31 and second inductance 32 are all followed the length direction of first electrode 21 and second electrode 22 distributes, and a plurality of connect in proper order in turn between first inductance 31 and the second inductance 32 and form the three-dimensional spiral inductance unit of twining in electric capacity unit 2 outside through a conduction portion 33 for can prolong the length of inductance as far as possible in limited volume, be favorable to improving inductance magnetic flux in order to increase inductance value, can also reduce vortex current simultaneously, and then improve quality factor Q value and inductance coils's performance. In a specific implementation, the first inductor 31 at one end of the spiral inductor unit may be used as the first signal end, the first inductor 31 at the other end of the spiral inductor unit is connected to the first electrode 21 of the capacitor unit 2, and the second electrode 22 of the capacitor unit 2 is connected to an external circuit. In this embodiment, the conducting portion 33 may be a metal wire or other component capable of achieving electrical connection between the first inductor 31 and the second inductor 32.
The antenna assembly 1 is further provided with a signal pad 41 and a fixing pad 42 (not shown in fig. 1), the signal pad 41 is fixedly welded to the second signal end of the antenna assembly 1, the signal pad 41 is further connected with an external circuit to realize transmission of signals between the antenna assembly 1 and the external circuit, and the fixing pad 42 is used for fixedly welding the antenna assembly 1 to a circuit board of the electronic device.
The BT antenna of this embodiment is when carrying out the receipt and the transmission of signal, and the accessible comprises electric capacity unit 2 and spiral inductance unit LC filtering structure and carries out the filtering of interference signal, and then realizes the receipt and the transmission of specific frequency signal to the setting of antenna and LC filtering structure integration can also reduce the whole size of antenna when guaranteeing antenna performance.
Example two
Fig. 2 is a schematic structural diagram of a BT antenna with a filtering function according to this embodiment. The BT antenna of the present embodiment includes the spiral inductance unit 3, the signal pad 41, and the anchor pad 42 having the same structure and function as those of the first embodiment. The difference between the present embodiments is:
in the capacitor unit 2 of this embodiment, the first electrode 21 includes at least two first sub-plates 210 parallel to each other and connected at one end, and the interconnection end of the first sub-plate 210 is connected to the spiral inductor unit 3, so as to facilitate bidirectional transmission of signals between the spiral inductor unit 3 and the first sub-plate 210. The second electrode 22 includes at least two second sub-plates 220 parallel to each other and connected at one end, and the interconnection end of the second sub-plates 220 is connected to an external circuit, so as to facilitate bidirectional transmission of signals between the second sub-plates 220 and the external circuit. The first sub-pole plates and the second sub-pole plates are in one-to-one correspondence and are arranged at intervals to form a capacitor unit in an interdigital structure, so that the number of pole plates of the capacitor unit 2 is increased, the capacity of the capacitor unit 2 is changed, and the adjustment of the frequency of signals received or transmitted by an antenna is realized. In this embodiment, the number of the first sub-plate 210 and the number of the second sub-plate 220 are both two, but in other alternative embodiments, the number of the first sub-plate 210 and the number of the second sub-plate 220 may be adjusted according to the frequency of the signal to be received or transmitted, and when the number of the first sub-plate 210 and the second sub-plate 220 is adjusted, it only needs to be satisfied that the number of the first sub-plate 210 corresponds to that of the second sub-plate 220.
The antenna assembly of the present embodiment can expand the capacity of the capacitor unit 2 by providing the capacitor unit 2 in an interdigital structure, so that the antenna assembly is applicable to receiving and transmitting signals with various frequencies.
EXAMPLE III
As shown in fig. 3 and fig. 4, the BT antenna of this embodiment includes an antenna assembly 1 having the same or similar structure or function as the BT antenna of this embodiment, and optionally includes a capacitor unit 2 having the same or similar structure or function as the BT antenna of this embodiment, and the antenna assembly 1 of this embodiment further includes a multi-layer PCB structure, and the antenna assembly 1 is printed on the multi-layer PCB structure to reduce the overall size of the antenna assembly, thereby realizing miniaturization of the BT antenna.
The multi-layer PCB structure comprises a first PCB 5, at least one second PCB 6, at least one third PCB 7 and a fourth PCB 8 which are stacked from top to bottom, wherein a first electrode 21 and a second electrode 22 are respectively printed on the second PCB 6 and the third PCB 7; the first inductor 31 and the second inductor 32 are respectively printed on the first PCB 5 and the fourth PCB 8, and the PCBs are connected to each other through corresponding vias.
Specifically, the first PCB 5 is provided with a first via hole 51 and a plurality of second via holes 52 connected to the first inductor 31, the second PCB 6 is provided with a third via hole 61 connected to the first electrode 21, the third PCB 7 is provided with a fourth via hole 71 connected to the second electrode 22, and the fourth PCB 8 is provided with a plurality of fifth via holes 81 connected to the second inductor 32; the first through fifth through holes are respectively used for realizing the electrical connection between the corresponding PCBs. In a specific implementation, the first via hole 51 and the third via hole 61 may be soldered, so that the first inductor 31 is connected to the first electrode 21 of the capacitor unit 2 (the dotted lines in the figure indicate the connections between the components), and a bidirectional transmission of signals between the spiral inductor unit and the first electrode 21 is realized; the second via hole 52 and the corresponding fifth via hole 81 are welded to form the conduction part 33, so that the adjacent first inductor 31 and the second inductor 32 are connected, and bidirectional transmission of signals on the spiral inductor unit is realized; the fourth via hole 71 is soldered to the fixing pad 42, so that the second electrode 22 of the capacitor unit 2 is connected to an external circuit, and bidirectional transmission of signals between the second electrode 22 of the capacitor unit 2 and the external circuit is realized.
Preferably, the first via hole 51 and the third via hole 61 coincide in horizontal projection; the second via holes 52 are connected to respective ends of the first inductor 31 in a one-to-one correspondence, and the second via holes 52 and the fifth via holes 81 are overlapped in a horizontal projection. A plurality of sixth via holes 62 and seventh via holes 72 corresponding to one another are formed at positions on the second PCB 6 and the third PCB 7 corresponding to the second via holes 52 and the fifth via holes 81, respectively, and the second via holes 52 and the fifth via holes 81 are communicated through the sixth via holes 62 and the seventh via holes 72.
The back of the multi-layer PCB structure is provided with an encapsulation layer 4, and the encapsulation layer 4 is connected with the antenna component 1 printed on the multi-layer PCB structure through a via hole; the signal pads 41 and the fixing pads 42 are printed on the encapsulation layer 4. Preferably, an eighth via 82 is formed at a position on the fourth PCB 8 corresponding to the fourth via 71 and the anchor pad 42, and the fourth via 71 and the anchor pad 42 are conducted through the eighth via 82.
As shown in fig. 5, in the present embodiment, in order to increase the capacity of the capacitor unit 2 and implement receiving and transmitting of signals with different frequencies, a second PCB 6 with the same multilayer structure and a third PCB 7 with the same multilayer structure may be further disposed, and the second PCB 6 and the third PCB 7 are stacked at intervals. Correspondingly, the first sub-plates 210 of the first electrode 21 are printed on the second PCB, and the second sub-plates 220 of the second electrode 22 are printed on the third PCB 7, respectively, so as to form the capacitor unit 2 in the interdigital structure as shown in the second embodiment, thereby implementing the capacity expansion of the capacitor unit 2.
The BT antenna of the embodiment prints the antenna assembly on a multi-layer PCB structure, can effectively reduce the volume of the whole antenna assembly, and is favorable for realizing the miniaturization of the BT antenna.
The utility model discloses at the during operation, divide into signal reception process and signalling process, and two processes can go on simultaneously, realize going upward the transmission of signal and down signal promptly simultaneously. Specifically, when the antenna assembly receives a signal, an electrical signal is induced through the second inductor 32 at the end of the spiral inductor unit, the electrical signal is transmitted to the first electrode 21 (corresponding to the third electrode 531 in the second embodiment) along the spiral inductor unit, the signal is coupled to the second electrode 22 (corresponding to the fourth electrode 541 in the second embodiment) through the coupling effect of the capacitor, and finally the signal received by the antenna assembly is transmitted to the external circuit through the signal pad 41. When the antenna assembly performs signal transmission, the signal flow direction of the antenna assembly is opposite to that of the received signal, that is, the signal generated by the external circuit is firstly transmitted to the second electrode 22 (corresponding to the fourth electrode 541 in the second embodiment) through the signal pad 41, and then is coupled to the first electrode 21 (corresponding to the third electrode 531 in the second embodiment) through the coupling effect of the capacitor, and finally is radiated to the external space through the spiral inductance unit.
The utility model discloses a LC filtering structure avoids additionally setting up filtering structure with the mode that sets up of antenna integration, and very big degree has reduced the volume of antenna module, is favorable to the miniaturization of antenna, and simple structure has stronger practicality.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.
Claims (8)
1. A BT antenna with filtering functionality comprising an antenna assembly having a first signal terminal and a second signal terminal, characterized by: the antenna component comprises a capacitor unit and a spiral inductor unit spirally wound outside the capacitor unit and connected with the capacitor unit in series; one end of the spiral inductance unit is suspended to form a first signal end for signal receiving and signal sending, the other end of the spiral inductance unit is connected with one pole of the capacitance unit in series to form an LC filter structure for signal transmission, and the other pole of the capacitance unit forms a second signal end connected with an external circuit.
2. The BT antenna with filtering function according to claim 1, wherein: the capacitor unit comprises a first electrode connected with the spiral inductor unit and a second electrode which is parallel to the first electrode and connected with an external circuit.
3. The BT antenna with filtering function according to claim 2, wherein: the first electrode and the second electrode are both unipolar plates.
4. The BT antenna with filtering function according to claim 2, wherein: the first electrode comprises at least two first sub-pole plates which are parallel to each other and connected at one end, the interconnection end of the first sub-pole plates is connected with the spiral inductance unit, the second electrode comprises at least two second sub-pole plates which are parallel to each other and connected at one end, and the interconnection end of the second sub-pole plates is connected with an external circuit; the first sub-pole plates and the second sub-pole plates are in one-to-one correspondence in number and are arranged at intervals to form a capacitor unit in an interdigital structure.
5. The BT antenna with filtering function according to claim 2, wherein: the spiral inductance unit comprises a plurality of first inductors and second inductors which are respectively arranged on two sides of the capacitor unit, the first inductors and the second inductors are distributed along the length direction of the capacitor unit, and the first inductors and the second inductors are sequentially and alternately connected through conduction parts to form a three-dimensional spiral inductance unit wound outside the capacitor unit.
6. The BT antenna with filtering function according to claim 5, wherein: the inductor comprises a first PCB, at least one second PCB, at least one third PCB and a fourth PCB, wherein the first PCB, the second PCB, the third PCB and the fourth PCB are stacked from top to bottom, the first inductor and the second inductor are respectively printed on the first PCB and the fourth PCB, and the first electrode and the second electrode are respectively printed on the second PCB and the third PCB.
7. The BT antenna with filtering function according to claim 6, wherein: the first PCB is provided with a first via hole and a plurality of second via holes which are connected with the first inductor, each second PCB is provided with a third via hole which is connected with the first electrode, each third PCB is provided with a fourth via hole which is connected with the second electrode, and the fourth PCB is provided with a plurality of fifth via holes which are connected with the second inductor; the first via hole is connected with the third via hole, the second via hole is connected with the fifth via hole, the second via hole and the fifth via hole are welded to form the conduction part, and the fourth via hole is connected with an external circuit; and a sixth through hole and a seventh through hole which are connected with the corresponding second through hole and the corresponding fifth through hole are also arranged on the second PCB and the third PCB.
8. The BT antenna with filtering function according to claim 7, wherein: the packaging structure is characterized by further comprising a packaging layer, wherein a signal bonding pad and a fixed bonding pad are arranged on the packaging layer, and the fourth via hole is connected with an external circuit through the signal bonding pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121693650.0U CN215266663U (en) | 2021-07-22 | 2021-07-22 | BT antenna with filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121693650.0U CN215266663U (en) | 2021-07-22 | 2021-07-22 | BT antenna with filtering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215266663U true CN215266663U (en) | 2021-12-21 |
Family
ID=79494307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121693650.0U Active CN215266663U (en) | 2021-07-22 | 2021-07-22 | BT antenna with filtering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215266663U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394559A (en) * | 2021-07-22 | 2021-09-14 | 深圳市得自在科技有限公司 | BT antenna with filtering function |
| WO2023138034A1 (en) * | 2022-01-18 | 2023-07-27 | 安徽安努奇科技有限公司 | Antenna assembly and communication system |
-
2021
- 2021-07-22 CN CN202121693650.0U patent/CN215266663U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394559A (en) * | 2021-07-22 | 2021-09-14 | 深圳市得自在科技有限公司 | BT antenna with filtering function |
| WO2023138034A1 (en) * | 2022-01-18 | 2023-07-27 | 安徽安努奇科技有限公司 | Antenna assembly and communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104685713B (en) | Impedance inverter circuit and radio communication device | |
| CN215266663U (en) | BT antenna with filtering function | |
| US8803634B2 (en) | Branching device | |
| US8754738B2 (en) | Transformer having high degree of coupling, electronic circuit, and electronic device | |
| CN106209009B (en) | Impedance matching switching circuit, antenna assembly and communication terminal | |
| CN103518324B (en) | Impedance inverter circuit and communication terminal | |
| CN111384594B (en) | High-frequency radiator, multi-frequency array antenna and base station | |
| CN204335178U (en) | Antenna assembly and radio communication device | |
| US9837976B2 (en) | Impedance converting circuit and communication terminal apparatus | |
| JPH10200360A (en) | Laminated balun transformer | |
| CN104919713A (en) | High-frequency switch module | |
| EP3327859B1 (en) | Directional coupler and communication module | |
| CN109672019B (en) | Terminal MIMO antenna device and method for realizing antenna signal transmission | |
| CN105210291A (en) | Tunable filter systems, devices and method | |
| CN102355223B (en) | Single-chip GSM (Global System for Mobile Communications) radio-frequency antenna switch module and GSM radio-frequency front end | |
| CN106716634A (en) | High frequency component | |
| CN109494489A (en) | Filter integrated form antenna for base station | |
| CN105745839A (en) | Impedance-conversion-ratio setting method, impedance conversion circuit, and communication-terminal device | |
| CN113394559A (en) | BT antenna with filtering function | |
| CN214203934U (en) | Laminated sheet type bridge | |
| CN110830072A (en) | Radio frequency duplexer and mobile terminal based on PCB | |
| CN102074793B (en) | Electromagnetic coupler and communication apparatus using the same | |
| KR100326949B1 (en) | Dielectric filter, transmission/reception sharing device and communication device | |
| CN102332640B (en) | Electromagnetic coupler and information communication device including same | |
| CN215896088U (en) | Filter circuit module, filter circuit element, filter circuit, and communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |