CN209593408U - A kind of simple reliable novel built-in and external antenna automatic identification switching circuit - Google Patents
A kind of simple reliable novel built-in and external antenna automatic identification switching circuit Download PDFInfo
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- CN209593408U CN209593408U CN201920645059.4U CN201920645059U CN209593408U CN 209593408 U CN209593408 U CN 209593408U CN 201920645059 U CN201920645059 U CN 201920645059U CN 209593408 U CN209593408 U CN 209593408U
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- module circuit
- frequency switch
- switch module
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Abstract
The utility model discloses a kind of simple reliable novel built-in and external antenna automatic identification switching circuits, more particularly to network and field of communication technology, including switching circuit, the switching circuit connecting pin is connected with radio-frequency switch module circuit, two signal output end RF2 of the radio-frequency switch module circuit, RF3 is connected separately with built-in antenna and external antenna, there are two independent switch control PIN for the radio-frequency switch module circuit, respectively EN and CTRL, the EN is set as high level always, the signal input part RF1 of the radio-frequency switch module circuit and it is connected with radio frequency module circuit.The utility model simplifies built-in antenna and external antenna switching circuit, a kind of interior external antenna automatic switch-over circuit of pure hardware controls is provided, overcome the problems, such as that existing scheme implements more complicated and higher cost, simple reliable and lower cost solution reduces product development difficulty and reinforces the market competitiveness of product.
Description
Technical field
The utility model relates to networks and field of communication technology, more specifically, this is practical be related to it is a kind of simple reliable
Novel built-in and external antenna automatic identification switching circuit.
Background technique
With the development of network and the communication technology, WLAN has been deep into each angle of huge numbers of families and life
It falls, WiFi technology is short distance wireless technical used in office or family, with its high speed, uniqueness convenient, at low cost
Advantage has obtained unprecedented favour, brings unprecedented convenience for every user, but WiFi technology covering radius is small, hides existing
Gear or from the environment of farther out, signal it is weaker even without signal the problem of it is especially prominent, to meet WiFi equipment in villa, sky
Between use in the environment such as big office, the just built-in antenna of the external and general requirements configured with high-gain, user can basis
The demand unrestricted choice of itself.
To meet use of the WiFi equipment in the varying environments such as the big office in villa, space, ordinary family user, WiFi
Device configuration has a built-in antenna of the external and general requirements of high-gain, user can according to demand unrestricted choice itself, and
The key that external antenna uses is how to realize the automatic identification and switching of built-in antenna and external antenna.Traditional WiFi is set
Standby interior external antenna switches usage mode are as follows: booting manually sets selection external antenna, which behaviour in APP or background interface
Make complexity, does not support hot plug to connect, it is inconvenient to use；Or software control RF switching is added by complicated circuit for detecting
Scheme, this scheme needs software and hardware cooperating, implements more complicated and higher cost, need one it is simple reliable and
Lower cost solution reinforces the market competitiveness of product.
Utility model content
In order to overcome the drawbacks described above of the prior art, the embodiments of the present invention provide a kind of simple reliable novel interior
Set with external antenna automatic identification switching circuit, simplify built-in antenna and external antenna switching circuit, a kind of pure hardware be provided
The interior external antenna automatic switch-over circuit of control, overcomes the problems, such as that existing scheme implements more complicated and higher cost, letter
Easily reliable and lower cost solution reduces product development difficulty and reinforces the market competitiveness of product, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions: a kind of simple reliable novel built-in with outside
Antenna automatic identification switching circuit, including switching circuit are set, the switching circuit connecting pin is connected with radio-frequency switch module circuit,
Two signal output ends RF2, RF3 of the radio-frequency switch module circuit are connected separately with built-in antenna and external antenna, described
There are two independent switch control PIN, respectively EN and CTRL, the EN to be set as high electricity always for radio-frequency switch module circuit
It is flat, the signal input part RF1 of the radio-frequency switch module circuit and it is connected with radio frequency module circuit, the radio-frequency switch module electricity
The end VBAT on road is connected with power module, and the end EN of the radio-frequency switch module circuit is connect with power module, the external day
The input terminal of line is connected with voltage detection module circuit, and the voltage detection module circuit is according to the flat transmission of electricity pressure of the height detected
Detection signal is generated, the end CTRL of the radio-frequency switch module circuit is connected with detection signal, the radio-frequency switch module circuit
According to detection signal connection built-in antenna or external antenna, the radio-frequency switch module circuit connecting end is connected with radio-frequency match electricity
Road, the radio frequency matching circuit connecting pin are connected with signal wire electrostatic discharge protection circuit, the voltage detection module circuit connecting end
It is connected with power supply line electrostatic discharge protection circuit.
In a preferred embodiment, the output end of the radio frequency module circuit is connected with radio-frequency switch module electricity
Road, the radio-frequency switch module circuit end are connected with voltage detection module circuit and external antenna circuit.
In a preferred embodiment, the signal input part RF1 and radio-frequency module of the radio-frequency switch module circuit
Circuit output end connection, for the transmitting and reception of radiofrequency signal, the signal input part RF2 of the radio-frequency switch module circuit with
The connection of built-in antenna module end, for the transmitting and reception of radiofrequency signal, the signal input part of the radio-frequency switch module circuit
RF3 is connect with external antenna module end, the transmitting and reception for radiofrequency signal.
In a preferred embodiment, the power module 2.5V concatenates a R100R resistance and GND is added to respectively
The end radio-frequency switch module circuit VBAT and GND, for the operating voltage of radio-frequency switch module circuit, the power module 2.5V string
The end EN that a R114.7K resistance adds to radio-frequency switch module circuit is connect, the EN for radio-frequency switch module circuit keeps high electricity
Ordinary mail number.
In a preferred embodiment, the input terminal of the voltage detection module circuit passes through a L1468nH electricity
Sense adds to external antenna module end connecting pin, for filtering out the transmitting of antenna end or receiving radiofrequency signal, makes penetrating for external antenna
Frequency signal is isolated with voltage detection module circuit, and the voltage detection module circuit concatenates a R134.7K resistance and adds to power supply
One R14100R resistance of module end and concatenation adds to the isolation end inductance L14, by dividing original output detection voltage, for defeated
Signal 0 or 1 is detected out.
In a preferred embodiment, the external antenna rectifies one 0R resistance of string between cathode, for dragging down electricity
The detection voltage for pressing detection module circuit detects signal using the low and high level of voltage detection module circuit end output, adds to and penetrate
The end CTRL of frequency switch module circuit, the control signal as radio-frequency switch module circuit.
In a preferred embodiment, the signal wire electrostatic discharge protection circuit is increasing at the port RF2, RF3
One 68nH inductance makes the external electrostatic introduced be released to ground by 68nH inductance.
In a preferred embodiment, the power supply line electrostatic discharge protection circuit circuit is close to voltage detection module electricity
Increase a two-way TVS pipe D18 at the input port of road, so that the external electrostatic introduced is released to ground by TVS pipe D18, according to reality
Border test request piece uploading.
In a preferred embodiment, the radio frequency matching circuit close to radio-frequency switch module circuit RF2 and
A T-type matching network is placed at the end RF3 respectively, design is reserved, according to radio-frequency line impedance adjustment capacitor and inductance value piece uploading.
The technical effect and advantage of the utility model: the utility model simplifies built-in antenna and external antenna switching electricity
Road provides a kind of interior external antenna automatic switch-over circuit of pure hardware controls, overcome existing scheme implement it is more complicated and
The problem of higher cost, simple reliable and lower cost solution reduce product development difficulty and reinforce the market competitiveness of product.
Detailed description of the invention
Fig. 1 is the system flow schematic diagram of the utility model.
Fig. 2 is the circuit theory schematic diagram of the utility model.
Appended drawing reference are as follows: 1 switching circuit, 2 radio-frequency switch module circuits, 3 radio frequency module circuits, 4 power modules, 5 voltages
Detection module circuit, 6 external antennas, 7 built-in antennas, 8 signal wire electrostatic discharge protection circuits, 9 radio frequency matching circuits, 10 power supply lines are quiet
Electric protection circuit, 11 detection signals.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of simple reliable novel built-in and external antenna automatic identification as shown in Figs. 1-2
Switching circuit, including switching circuit 1,1 connecting pin of switching circuit are connected with radio-frequency switch module circuit 2, and the radio frequency is opened
Two signal output ends RF2, RF3 for closing modular circuit 2 are connected separately with built-in antenna 7 and external antenna 6, the RF switch
There are two independent switch control PIN, respectively EN and CTRL for modular circuit 2, and the EN is set as high level always, described to penetrate
The signal input part RF1 of frequency switch module circuit 2 and it is connected with radio frequency module circuit 3, the radio-frequency switch module circuit 2
The end VBAT is connected with power module 4, and the end EN of the radio-frequency switch module circuit 2 is connect with power module 4, the external antenna
6 input terminal is connected with voltage detection module circuit 5, and the voltage detection module circuit 5 is according to the flat transmission of electricity of the height detected
Pressure generates detection signal 11, and the end CTRL of the radio-frequency switch module circuit 2 is connected with detection signal 11, the RF switch mould
Block circuit 2 connects built-in antenna 7 or external antenna 6,2 connecting pin of the radio-frequency switch module circuit connection according to detection signal 11
There is radio frequency matching circuit 9,9 connecting pin of radio frequency matching circuit is connected with signal wire electrostatic discharge protection circuit 8, the voltage detecting
5 connecting pin of modular circuit is connected with power supply line electrostatic discharge protection circuit 10；
Further, the output end of 3 circuit of radio frequency module circuit is connected with radio-frequency switch module circuit 2, described to penetrate
2 end of frequency switch module circuit is connected with 6 circuit of voltage detection module circuit 5 and external antenna.
Further, the signal input part RF1 of the radio-frequency switch module circuit 2 and 3 output end of radio frequency module circuit connect
It connects, for the transmitting and reception of radiofrequency signal, the signal input part RF2 and 7 mould of built-in antenna of the radio-frequency switch module circuit 2
Block end connection, for the transmitting and reception of radiofrequency signal, the signal input part RF3 of the radio-frequency switch module circuit 2 with it is external
The connection of 6 module end of antenna, transmitting and reception for radiofrequency signal.
Further, the power module 42.5V concatenates a R100R resistance and GND adds to radio-frequency switch module respectively
The end circuit 2VBAT and GND, for the operating voltage of radio-frequency switch module circuit 2, the power module 42.5V concatenates one
R114.7K resistance adds to the end EN of radio-frequency switch module circuit 2, and the EN for radio-frequency switch module circuit 2 keeps high level letter
Number.
Further, the input terminal of the voltage detection module circuit 5 adds to external antenna by a L1468nH inductance
6 module end connecting pins make the radiofrequency signal and voltage of external antenna 6 for filtering out the transmitting of antenna end or receiving radiofrequency signal
Detection module circuit 5 is isolated, and the voltage detection module circuit 5 concatenates a R134.7K resistance and adds to 4 end of power module and string
It connects a R14100R resistance and adds to the isolation end inductance L14, by dividing original output detection voltage, for exporting detection signal
110 or 1.
Further, the external antenna 6 rectifies one 0R resistance of string between cathode, for dragging down voltage detection module circuit
5 detection voltage detects signal 11 using the low and high level of 5 end of voltage detection module circuit output, adds to radio-frequency switch module
The end CTRL of circuit 2, the control signal as radio-frequency switch module circuit 2.
Further, the signal wire electrostatic discharge protection circuit 8 is increasing a 68nH inductance at the port RF2, RF3,
The external electrostatic introduced is set to be released to ground by 68nH inductance.
Further, the power supply line electrostatic discharge protection circuit 10 is increasing at 5 input port of voltage detection module circuit
Add a two-way TVS pipe D18, the external electrostatic introduced is made to be released to ground by TVS pipe D18, piece uploading is required according to actual test.
Further, the radio frequency matching circuit 9 is placed respectively at the end RF2 and RF3 close to radio-frequency switch module circuit 2
One T-type matching network reserves design, according to radio-frequency line impedance adjustment capacitor and inductance value piece uploading.
Utility model works principle:
Referring to Figure of description 1-2, when the utility model is used, when external antenna 6 accesses, because of 6 end of external antenna
Over the ground by a 0R resistance, 5 voltage of voltage detection module circuit can be divided as 0.05V, and voltage detection module circuit 5 exports low
Voltage 0.05V meets CTRL and defines the low level condition of 0V to 0.4V, and switching to the port connection RF3 RF1 is connected, and product is logical
It crosses the transmitting of external antenna 6 and receives signal；When external antenna 6 does not access, 5 voltage of voltage detection module circuit, which can divide, is
2.5V, voltage detection module circuit 5 export low-voltage 2.5V and meet the condition that CTRL defines 1.6V to 2.7V high level, and switch is cut
The port RF2 is changed to, product emits and receive signal by built-in antenna 7；Pass through the above switch logic relational implementation built-in antenna 7
With 1 function of 6 automatic identification of external antenna and switching circuit.
The several points that should finally illustrate are: firstly, in the description of the present application, it should be noted that unless otherwise prescribed and
It limits, term " installation ", " connected ", " connection " shall be understood in a broad sense, can be mechanical connection or electrical connection, be also possible to two
Connection inside element, can be directly connected, and "upper", "lower", "left", "right" etc. are only used for indicating relative positional relationship, when
The absolute position for being described object changes, then relative positional relationship may change；
Secondly: the utility model discloses in embodiment attached drawing, relates only to the structure being related to the embodiment of the present disclosure,
His structure, which can refer to, to be commonly designed, and under not conflict situations, the utility model the same embodiment and different embodiments can be mutual
Combination；
Last: the above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (9)
1. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit, including switching circuit (1), feature
Be: switching circuit (1) connecting pin is connected with radio-frequency switch module circuit (2), the radio-frequency switch module circuit (2)
Two signal output ends RF2, RF3 are connected separately with built-in antenna (7) and external antenna (6), the radio-frequency switch module circuit
(2) there are two independent switch control PIN, respectively EN and CTRL, the EN to be set as high level always, the RF switch
It the signal input part RF1 of modular circuit (2) and is connected with radio frequency module circuit (3), the radio-frequency switch module circuit (2)
The end VBAT is connected with power module (4), and the end EN of the radio-frequency switch module circuit (2) is connect with power module (4), described outer
The input terminal for setting antenna (6) is connected with voltage detection module circuit (5), and voltage detection module circuit (5) basis detects
The flat transmission of electricity pressure of height generate detection signal (11), the end CTRL of the radio-frequency switch module circuit (2) is connected with detection signal
(11), the radio-frequency switch module circuit (2) is described according to detection signal (11) connection built-in antenna (7) or external antenna (6)
Radio-frequency switch module circuit (2) connecting pin is connected with radio frequency matching circuit (9), radio frequency matching circuit (9) the connecting pin connection
Have signal wire electrostatic discharge protection circuit (8), voltage detection module circuit (5) connecting pin is connected with power supply line electrostatic discharge protection circuit
(10)。
2. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the output end of the radio frequency module circuit (3) is connected with radio-frequency switch module circuit (2), the RF switch mould
Block circuit (2) end is connected with voltage detection module circuit (5) and external antenna (6) circuit.
3. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the signal input part RF1 of the radio-frequency switch module circuit (2) is connect with radio frequency module circuit (3) output end, is used
In the transmitting and reception of radiofrequency signal, the signal input part RF2 and built-in antenna (7) mould of the radio-frequency switch module circuit (2)
The connection of block end, for the transmitting and reception of radiofrequency signal, the signal input part RF3 of the radio-frequency switch module circuit (2) and outer
Set the connection of antenna (6) module end, transmitting and reception for radiofrequency signal.
4. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: power module (4) 2.5V concatenates a R100R resistance and GND adds to radio-frequency switch module circuit (2) respectively
The end VBAT and GND, is used for the operating voltage of radio-frequency switch module circuit (2), and power module (4) 2.5V concatenates one
R114.7K resistance adds to the end EN of radio-frequency switch module circuit (2), and the EN for radio-frequency switch module circuit (2) keeps high electricity
Ordinary mail number.
5. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the input terminal of the voltage detection module circuit (5) adds to external antenna (6) mould by a L1468nH inductance
Block end connecting pin examines the radiofrequency signal of external antenna (6) and voltage for filtering out the transmitting of antenna end or receiving radiofrequency signal
Modular circuit (5) isolation is surveyed, the voltage detection module circuit (5) concatenates a R134.7K resistance and adds to power module (4) end
The isolation end inductance L14 is added to one R14100R resistance of concatenation, by dividing original output detection voltage, for exporting detection
Signal (11) 0 or 1.
6. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the external antenna (6) rectifies one 0R resistance of string between cathode, for dragging down voltage detection module circuit (5)
Voltage is detected, signal (11) are detected using the low and high level of voltage detection module circuit (5) end output, add to radio-frequency switch module
The end CTRL of circuit (2), the control signal as radio-frequency switch module circuit (2).
7. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the signal wire electrostatic discharge protection circuit (8) is increasing a 68nH inductance at the port RF2, RF3, makes outside
The electrostatic of introducing is released to ground by 68nH inductance.
8. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: power supply line electrostatic discharge protection circuit (10) circuit is increasing at voltage detection module circuit (5) input port
Add a two-way TVS pipe D18, the external electrostatic introduced is made to be released to ground by TVS pipe D18, piece uploading is required according to actual test.
9. a kind of simple reliable novel built-in and external antenna automatic identification switching circuit according to claim 1,
Be characterized in that: the radio frequency matching circuit (9) places one at the end RF2 and RF3 close to radio-frequency switch module circuit (2) respectively
T-type matching network reserves design, according to radio-frequency line impedance adjustment capacitor and inductance value piece uploading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645059.4U CN209593408U (en) | 2019-05-07 | 2019-05-07 | A kind of simple reliable novel built-in and external antenna automatic identification switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645059.4U CN209593408U (en) | 2019-05-07 | 2019-05-07 | A kind of simple reliable novel built-in and external antenna automatic identification switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209593408U true CN209593408U (en) | 2019-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920645059.4U Expired - Fee Related CN209593408U (en) | 2019-05-07 | 2019-05-07 | A kind of simple reliable novel built-in and external antenna automatic identification switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209593408U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600580A (en) * | 2020-12-07 | 2021-04-02 | 广东电网有限责任公司韶关供电局 | Ad hoc network remote wireless communication module |
| CN112929048A (en) * | 2021-01-27 | 2021-06-08 | 广州亚美智造科技有限公司 | Double-antenna switching circuit |
-
2019
- 2019-05-07 CN CN201920645059.4U patent/CN209593408U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600580A (en) * | 2020-12-07 | 2021-04-02 | 广东电网有限责任公司韶关供电局 | Ad hoc network remote wireless communication module |
| CN112929048A (en) * | 2021-01-27 | 2021-06-08 | 广州亚美智造科技有限公司 | Double-antenna switching circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 Termination date: 20210507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |