CN110768683A - Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist - Google Patents
Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist Download PDFInfo
- Publication number
- CN110768683A CN110768683A CN201911138282.0A CN201911138282A CN110768683A CN 110768683 A CN110768683 A CN 110768683A CN 201911138282 A CN201911138282 A CN 201911138282A CN 110768683 A CN110768683 A CN 110768683A
- Authority
- CN
- China
- Prior art keywords
- wifi
- noise ratio
- antenna
- filter
- enhancing 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.)
- Pending
Links
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention relates to a device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist, which comprises a wireless processing module and an antenna, wherein a filter is connected between the wireless processing module and the antenna, the filter is formed by connecting an LC series circuit and an LC parallel circuit in series, the LC series circuit is used for filtering signals with lower frequency received by the antenna, and the LC parallel circuit is used for filtering signals with higher frequency received by the antenna. The invention can effectively reduce the production cost of the product and realize the adjustability of the receiving and transmitting frequency.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist.
Background
The transmission of wireless signals such as 4G, WIFI, WIMAX and the like in the same air medium can increase the noise of other wireless signals, reduce the signal-to-noise ratio of the signals, and finally show that the wireless transceiving rate is reduced.
One of the current common practices is to use a shielding case in the device to shield the transceiver circuitry or to use a modular band pass or low pass filter in the transceiver circuitry for filtering.
In the method, the use of the shielding case can obviously increase the processing procedure and difficulty of equipment, thereby causing the production cost of products to be sharply increased and being not beneficial to the heat dissipation of the transceiving circuit. On the other hand, because the parameters of the band-pass filter or the low-pass filter are fixed, the transceiving frequency of the transceiving circuit cannot be adjusted, so that the product is very inconvenient to repair and debug, and the production and maintenance cost of the product is directly increased.
Disclosure of Invention
Therefore, a device for enhancing the signal-to-noise ratio when WiFi, 4G and WiMAX coexist is needed, which can effectively reduce the production cost of the product and realize adjustable transceiving frequency.
In order to achieve the above purpose, the invention adopts the following technical scheme.
The invention provides a device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist, which comprises a wireless processing module and an antenna, wherein a filter is connected between the wireless processing module and the antenna, the filter is formed by connecting an LC series circuit and an LC parallel circuit in series, the LC series circuit is used for filtering signals with lower frequency received by the antenna, and the LC parallel circuit is used for filtering signals with higher frequency received by the antenna.
Preferably, the filter is disposed inside the antenna, and the antenna has a receiving circuit printed by a PCB board.
Preferably, the filter is arranged in parallel with the receiving circuit.
Preferably, the wireless processing module is a WIFI module.
Preferably, the LC series circuit includes a first capacitor and a first inductor, the first capacitor is an adjustable capacitor, and the first inductor is an adjustable inductor.
Preferably, the capacitance value of the first capacitor is 10pf, and the inductance value of the first inductor is 2.4 nh.
Preferably, the LC parallel circuit includes a second capacitor and a second inductor, the second capacitor is an adjustable capacitor, and the second inductor is an adjustable inductor.
Preferably, the capacitance value of the second capacitor is 0.5pf, and the inductance value of the second inductor is 1.5 nh.
Preferably, the transceiver circuit has at least two antennas, and each antenna is provided with one filter in parallel.
Preferably, the device is a wireless router.
The invention adopts the filter formed by connecting the LC series circuit and the LC parallel circuit in series, can filter the signal with lower frequency received by the antenna through the LC series circuit, and filter the signal with higher frequency received by the antenna through the LC parallel circuit to obtain the required main frequency signal, thereby achieving the effect of enhancing the signal-to-noise ratio of the equipment when WiFi, 4G and WiMAX signals coexist, and the filter is only formed by a capacitor and an inductor, has low element cost, thereby effectively reducing the production cost of the product and simplifying the production difficulty. Meanwhile, if the LC series circuit and the LC parallel circuit adopt adjustable capacitors and inductors, the frequency required to be selected can be adjusted, so that the debugging of products when leaving a factory is greatly facilitated, and the production and adjustment efficiency of the products is improved.
Drawings
FIG. 1 is a schematic block diagram of a transceiver circuit in a device for enhancing SNR when WiFi, 4G and WiMAX coexist in an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a filter in an embodiment of the invention;
fig. 3 is a schematic circuit diagram of a transceiver circuit in a device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist in the embodiment of the present invention.
Detailed Description
The following further description is made with reference to the drawings and specific embodiments.
As shown in fig. 1 to fig. 3, the present embodiment provides a device for enhancing a signal-to-noise ratio when WiFi, 4G and WiMAX coexist, where the device includes a wireless processing module and an antenna, a filter is connected between the wireless processing module and the antenna, the filter is formed by connecting an LC series circuit and an LC parallel circuit in series, the LC series circuit is configured to filter a lower-frequency signal received by the antenna, and the LC parallel circuit is configured to filter a higher-frequency signal received by the antenna.
As is well known, the frequency band of WIFI is 2.4GHZ or 5GHZ, the frequency band of 4G cellular signals is 1755-2655 MHz, and the frequency band of WiMAX signals is 2.3GHz, 2.5-2.7 GHz or 3.5 GHz.
When the wireless signals of the three bands exist simultaneously, the communication device receives the wireless signals simultaneously, and if harmonic interference cannot be effectively processed, the signal-to-noise ratio of the received main frequency signal is reduced, so that the wireless transceiving rate is reduced. Therefore, in this embodiment, the filter formed by connecting the LC series circuit and the LC parallel circuit in series is used to filter signals other than the main frequency, the LC series circuit is used to filter harmonic signals with a frequency lower than that of the main frequency signal, and the LC parallel circuit is used to filter harmonic signals with a frequency higher than that of the main frequency signal, so as to obtain a relatively pure main frequency signal.
Further, the filter is arranged inside the antenna, the antenna is provided with a receiving circuit formed by printing a PCB, and the filter and the receiving circuit are arranged in parallel. By directly filtering the wireless signals received by the receiving circuit, the circuit structure can be simplified, and the response speed can be improved.
In this embodiment, the wireless processing module is a WIFI module, and the device is a wireless router. The function and principle of the present invention will be described in detail below by taking a wireless router as an example.
LC series circuit includes first electric capacity C1 and first inductance L1, first electric capacity C1 is adjustable electric capacity, first inductance L1 is adjustable inductance, makes the wave filter of this embodiment can realize adjustable filtering, conveniently debugs the product when product production, and the debugging space is great, can adapt to the frequency range of broad, realizes that receiving and dispatching frequency is adjustable.
Preferably, when the device is a wireless router, the capacitance value of the first capacitor is set to 10pf, the inductance value of the first inductor is set to 2.4nh, and the WIFI signal transceiving rate is high.
Similarly, the LC parallel circuit includes a second capacitor C2 and a second inductor L2, the second capacitor C2 is an adjustable capacitor, and the second inductor L2 is an adjustable inductor.
Preferably, when the device is a wireless router, the capacitance value of the second capacitor is 0.5pf, and the inductance value of the second inductor is 1.5nh, so that the device has better filtering performance and faster WIFI signal transceiving rate.
The transceiver circuit of this embodiment has at least two antennas, every antenna all connects in parallel and is provided with one the filter, therefore, can be applicable to the equipment of many MIMO antennas.
After the filter is adopted, the function of flattening the wave crest can be realized for broadband noise. For narrow-band noise, it can be made narrower and the amplitude can be reduced to optimize the main frequency waveform and achieve the best transceiving state.
In summary, the filter formed by connecting the LC series circuit and the LC parallel circuit in series is adopted in the invention, a signal with a lower frequency received by the antenna can be filtered by the LC series circuit, and a signal with a higher frequency received by the antenna can be filtered by the LC parallel circuit to obtain a required main frequency signal, so that the effect of enhancing the signal-to-noise ratio of the equipment when WiFi, 4G and WiMAX signals coexist is achieved. Meanwhile, if the LC series circuit and the LC parallel circuit adopt adjustable capacitors and inductors, the frequency required to be selected can be adjusted, so that the debugging of products when leaving a factory is greatly facilitated, and the production and adjustment efficiency of the products is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist, the device comprises a wireless processing module and an antenna, and is characterized in that: a filter is connected between the wireless processing module and the antenna, the filter is formed by connecting an LC series circuit and an LC parallel circuit in series, the LC series circuit is used for filtering signals with lower frequency received by the antenna, and the LC parallel circuit is used for filtering signals with higher frequency received by the antenna.
2. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 1 wherein: the filter is arranged in the antenna, and the antenna is provided with a receiving circuit formed by printing a PCB.
3. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 2 wherein: the filter is arranged in parallel with the receiving circuit.
4. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 1, 2 or 3 wherein: the wireless processing module is a WIFI module.
5. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 1 wherein: the LC series circuit comprises a first capacitor and a first inductor, wherein the first capacitor is an adjustable capacitor, and the first inductor is an adjustable inductor.
6. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 5 wherein: the capacitance value of the first capacitor is 10pf, and the inductance value of the first inductor is 2.4 nh.
7. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 1 wherein: the LC parallel circuit comprises a second capacitor and a second inductor, the second capacitor is an adjustable capacitor, and the second inductor is an adjustable inductor.
8. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 7 wherein: the capacitance value of the second capacitor is 0.5pf, and the inductance value of the second inductor is 1.5 nh.
9. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist as claimed in any one of claims 5 to 8, wherein: the transceiver circuit is provided with at least two antennas, and each antenna is provided with one filter in parallel.
10. The apparatus for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist according to claim 9 wherein: the device is a wireless router.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911138282.0A CN110768683A (en) | 2019-11-20 | 2019-11-20 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911138282.0A CN110768683A (en) | 2019-11-20 | 2019-11-20 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110768683A true CN110768683A (en) | 2020-02-07 |
Family
ID=69338681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911138282.0A Pending CN110768683A (en) | 2019-11-20 | 2019-11-20 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110768683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300735A (en) * | 2021-05-10 | 2021-08-24 | Tcl通讯（宁波）有限公司 | Radio frequency antenna device, radio frequency antenna device signal receiving method and mobile terminal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070173202A1 (en) * | 2006-01-11 | 2007-07-26 | Serconet Ltd. | Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting |
| CN202352836U (en) * | 2011-10-28 | 2012-07-25 | 希姆通信息技术（上海）有限公司 | Double-frequency common antenna |
| JP2013150214A (en) * | 2012-01-20 | 2013-08-01 | Taiyo Yuden Co Ltd | Duplexer circuit |
| CN103904416A (en) * | 2012-12-27 | 2014-07-02 | 赛龙通信技术（深圳）有限公司 | Multi-frequency multiplexing antenna and mobile terminal applying same |
| US20150002347A1 (en) * | 2013-06-28 | 2015-01-01 | Research In Motion Limited | Antenna with a combined bandpass/bandstop filter network |
| US20170063411A1 (en) * | 2015-08-28 | 2017-03-02 | Skyworks Solutions, Inc. | Tunable notch filter |
| CN109286387A (en) * | 2017-07-21 | 2019-01-29 | 株式会社村田制作所 | High frequency filter, multiplexer, high frequency front end circuit and communication device |
| CN210958340U (en) * | 2019-11-20 | 2020-07-07 | 深圳市钮为通信技术有限公司 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
-
2019
- 2019-11-20 CN CN201911138282.0A patent/CN110768683A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070173202A1 (en) * | 2006-01-11 | 2007-07-26 | Serconet Ltd. | Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting |
| CN202352836U (en) * | 2011-10-28 | 2012-07-25 | 希姆通信息技术（上海）有限公司 | Double-frequency common antenna |
| JP2013150214A (en) * | 2012-01-20 | 2013-08-01 | Taiyo Yuden Co Ltd | Duplexer circuit |
| CN103904416A (en) * | 2012-12-27 | 2014-07-02 | 赛龙通信技术（深圳）有限公司 | Multi-frequency multiplexing antenna and mobile terminal applying same |
| US20150002347A1 (en) * | 2013-06-28 | 2015-01-01 | Research In Motion Limited | Antenna with a combined bandpass/bandstop filter network |
| US20170063411A1 (en) * | 2015-08-28 | 2017-03-02 | Skyworks Solutions, Inc. | Tunable notch filter |
| CN109286387A (en) * | 2017-07-21 | 2019-01-29 | 株式会社村田制作所 | High frequency filter, multiplexer, high frequency front end circuit and communication device |
| CN210958340U (en) * | 2019-11-20 | 2020-07-07 | 深圳市钮为通信技术有限公司 | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300735A (en) * | 2021-05-10 | 2021-08-24 | Tcl通讯（宁波）有限公司 | Radio frequency antenna device, radio frequency antenna device signal receiving method and mobile terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8391927B2 (en) | Multiple mode RF transceiver and antenna structure | |
| CN107112970B (en) | Filter circuit, RF front-end circuit, and communication device | |
| US11342898B2 (en) | Band pass filter | |
| US9209775B2 (en) | Electronic circuit | |
| CN210780743U (en) | Radio frequency circuit for solving 2.4G interference 5G wireless performance | |
| CN210958340U (en) | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist | |
| JP2014230276A (en) | Radio frequency matching circuit and wireless communication device | |
| CN103986435B (en) | Miniaturized wide-stop-band restraint LTCC low-pass filter | |
| CN110768683A (en) | Device for enhancing signal-to-noise ratio when WiFi, 4G and WiMAX coexist | |
| US9866261B2 (en) | RF antenna switch and method of operating the antenna switch | |
| CN202750077U (en) | Multi-frequency-range filter | |
| US10868518B2 (en) | Elastic wave device | |
| TWI540850B (en) | Wireless communication device and filter thereof | |
| CN219761020U (en) | WIFI radio frequency circuit | |
| CN211791458U (en) | Band-pass filter circuit and wireless transmitting and receiving system | |
| CN221227532U (en) | Radio frequency front end module | |
| CN215816374U (en) | Communication antenna device | |
| CN106160689B (en) | Wireless communication device and its filter | |
| CN212012647U (en) | Antenna-shared radio frequency circuit and antenna device | |
| CN217033701U (en) | Radio frequency interference suppression network for 5.8Ghz microwave detection and microwave detection device | |
| CN219875693U (en) | Band elimination frequency hopping filter | |
| CN213521808U (en) | Band-pass filter circuit of radio frequency amplifier chip | |
| CN115295985B (en) | Dual-passband bandpass filter and system suitable for dual-band communication system | |
| CN220022767U (en) | LC filter, single-path output antenna circuit and multi-path output antenna circuit | |
| KR20190076051A (en) | Filter devices and filter modules |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210209 Address after: 518000 R & D building 2002, block a, building 7, Vanke Cloud City Phase I, Xingke 1st Street, Xili community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN YOUHUA TECHNOLOGY Co.,Ltd. Address before: 518000 room 1203, entrepreneurship Park, Lishan road University Town, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN NIUWEI COMMUNICATION TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right |