CN212305329U - Antenna intelligent switching device and wireless router - Google Patents
Antenna intelligent switching device and wireless router Download PDFInfo
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- CN212305329U CN212305329U CN202021478631.1U CN202021478631U CN212305329U CN 212305329 U CN212305329 U CN 212305329U CN 202021478631 U CN202021478631 U CN 202021478631U CN 212305329 U CN212305329 U CN 212305329U
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Abstract
The utility model relates to an antenna intelligence auto-change over device and wireless router for intelligence switches built-in antenna and external antenna, including change over switch, change over switch has two inputs and two outputs, still includes an antenna interface that is used for pegging graft external antenna, change over switch is connected with a control circuit, control circuit is suitable for to work as external antenna inserts launch during the antenna interface external antenna, just external antenna follows launch when the antenna interface is dialled out built-in antenna. The utility model discloses need not the software algorithm, only need simple circuit can realize the intelligence switching between the internal and external antenna, not only nimble convenient, the dependable performance, product development cycle is short moreover, low in production cost.
Description
Technical Field
The utility model relates to the field of communication technology, in particular to antenna intelligent switching device and wireless router.
Background
With the widespread use of wireless routers, the wireless routers are often constrained by the product shipment form, and the built-in antenna can only satisfy the wireless coverage of a certain area or range. In addition, the wireless coverage performance is more compromised due to the influence of factors such as equipment power supply distance and building structure. Therefore, a wireless router equipped with an external antenna has appeared, which can adjust the antenna orientation according to the actual needs of the user to improve the quality of wireless coverage, so that the external antenna is a better signal extension scheme.
Products capable of intelligently switching internal and external antennas also exist in the market, but the products are all realized based on software algorithms. In this way, although intelligent, the development cost required to be invested is high, and in special cases, such as in a scenario where the algorithm cannot be considered thoroughly, the client cannot experience the performance improvement caused by intelligent switching.
SUMMERY OF THE UTILITY MODEL
Therefore, the intelligent antenna switching device and the wireless router need to be provided, software algorithm is not needed, intelligent switching between the internal antenna and the external antenna can be achieved only through a simple circuit, flexibility and convenience are achieved, the performance is reliable, the product research and development period is short, and production cost is low.
In order to achieve the above purpose, the present invention adopts the following technical solutions.
The utility model provides an antenna intelligence auto-change over device for intelligence switches built-in antenna and external antenna, including change over switch, change over switch has two inputs and two outputs, still includes an antenna interface that is used for pegging graft external antenna, change over switch is connected with a control circuit, control circuit is suitable for to work as external antenna inserts start during the antenna interface external antenna, just external antenna follows start when the antenna interface is dialled built-in antenna.
Preferably, the switch has a radio frequency signal input end, a first input end, a second input end, a first output end and a second output end, and when the voltage of the first input end is greater than a predetermined value, the radio frequency signal input end is connected with the antenna interface through the first output end; and when the voltage of the second input end is greater than a preset value, the radio-frequency signal input end is communicated with the built-in antenna through the second output end.
Preferably, the control circuit comprises a voltage division circuit and a triode, a base electrode of the triode is respectively connected with the antenna interface and the second input end, a collector electrode of the triode is connected with a high potential after being connected with the first input end in parallel, and an emitter electrode of the triode is grounded; the voltage division circuit is connected with the antenna interface, divides the voltage with the antenna interface and then loads the voltage to the base electrode of the triode so as to control the on-off of the triode.
Preferably, the high potential is 3-3.5V, and the predetermined value is 2-2.5V.
Preferably, the voltage dividing circuit includes a power supply and a voltage dividing resistor, the voltage of the power supply is 3-3.5V, and the resistance value of the voltage dividing resistor satisfies the following conditions:
Vcc*Rz/R1<0.7；
where Vcc is the supply voltage, RzIs the equivalent impedance of an external antenna, R1Is a voltage dividing resistor.
Preferably, the voltage dividing circuit is further provided with an inductor in series for suppressing power supply noise interference.
Preferably, an isolation capacitor is further disposed between the antenna interface and the first output terminal.
The utility model also provides a wireless router, including built-in antenna, radio frequency circuit and the external antenna that can insert and dial, still include above-mentioned antenna intelligent switching device, antenna intelligent switching device's one end is connected radio frequency circuit, the other end is connected respectively built-in antenna and antenna interface, antenna intelligent switching device is suitable for and is detected external antenna inserts during the antenna interface, switch to radio frequency circuit with external antenna's connection.
The utility model discloses based on the hardware mode completely, adopt change over switch and control circuit to carry out intelligent control for when external antenna inserts on the equipment, automatic switch is for using external antenna, when removing external antenna from the equipment, and automatic switch is to using internal antenna. The scheme is flexible and convenient to switch, software algorithm is not needed, the method can be realized by a simple circuit, the product research and development period is short, and the production cost is low.
Drawings
Fig. 1 is a schematic block diagram of an intelligent antenna switching device in this embodiment;
fig. 2 is a schematic circuit diagram of the intelligent antenna switching device in this embodiment;
fig. 3 is a schematic block diagram of the antenna router in this embodiment.
Detailed Description
The following further description is made with reference to the drawings and specific embodiments.
As shown in fig. 1, the present embodiment provides an antenna intelligent switching apparatus for an electronic device, which is used for intelligently switching an internal antenna and an external antenna, and includes a switch, where the switch has two input ends and two output ends, and an antenna interface for plugging the external antenna. The switch is connected with a control circuit, the control circuit is used for starting the external antenna when the external antenna is inserted into the antenna interface, and starting the internal antenna when the external antenna is pulled out from the antenna interface.
The structure and principle of the antenna intelligent switching device of the present embodiment will be described in detail below by taking a wireless router as an example.
As shown in fig. 2, the switch is a radio frequency switch, and the device has a first input terminal V1 and a second input terminal V2, a first output terminal J1 and a second output terminal J2, and a radio frequency signal input terminal. The implementation logic of the radio frequency switch is as follows: if V1> the predetermined value, the RF signal input from the RF signal input terminal will be output from the first output terminal J1; if V2> the predetermined value, the rf signal inputted from the rf signal input terminal will be outputted from the second output terminal J2. Here we choose the type SKY13370 rf switch, which can be set to a predetermined value of 2.5V. The loss caused by the radio frequency switch is only 0.5Db, the attenuation influence on signals is small, and therefore the sensitivity is high.
How to realize the plugging and unplugging of the external antenna is the key point of the configuration of the V1 and V2, and the specific principle is as follows.
The control circuit comprises a voltage divider circuit and a triodeThe transistor Q1, the transistor Q1 of this embodiment is an NPN-type 9013 transistor, which has an on voltage of about 2V, an off voltage of about 0.7V, and a PN junction voltage drop of about 0.5V. The base electrode of the triode Q1 is respectively connected with the antenna interface and the second input end V2, the collector electrode is connected with a high potential after being connected with the first input end V1 in parallel, and the emitter electrode is grounded. The high voltage is provided by a voltage source Vcc of 3-3.5V, preferably 3.3V. The voltage dividing circuit comprises a power supply and a voltage dividing resistor, wherein the voltage value of the power supply is 3-3.5V, and the preferred voltage value of the power supply is 3.3V. Voltage dividing resistor R1The resistance value of (1) satisfies the following conditions:
V0*Rz/R1<0.7；
wherein V0 is the power supply voltage, RzIs the equivalent impedance of the external antenna.
The impedance to ground of the external antenna can be equivalent to a resistor RzGenerally, the resistance is about 1.5K ohms. Suppose a voltage dividing resistor R1Is 10K ohms, R when a user inserts the external antenna into the antenna port1And RzThe voltage division is performed, and the potential of the base a of the transistor Q1 is 3.3 × 1.5/(1.5+10) ≈ 0.43V. The potential at point a is lower than the conduction voltage of transistor Q1, so transistor Q1 is not conducting, and at this time, the potential at point B of the collector is equal to the voltage of the voltage source, and is 3.3V.
Since 3.3V is greater than the predetermined value of V1, the rf signal inputted from the rf signal input terminal is outputted from the first output terminal J1, and the first output terminal J1 is connected to the external antenna, so that the external antenna is automatically activated.
When the external antenna is removed from the antenna interface, the potential at the point a is 3.3V, which is greater than the conduction voltage of the transistor Q1, the transistor Q1 is turned on, and the potential at the point B is 0, so that the potential at the point V1 is 0, the potential at the point V2 is 3.3V, and the voltage V2> a predetermined value, the radio frequency signal input from the radio frequency signal input terminal is output from the second output terminal J2, and the second output terminal J2 is connected to the internal antenna, so that the internal antenna is automatically enabled. Therefore, the embodiment perfectly realizes the intelligent switching of the internal antenna and the external antenna.
In addition, the voltage divider circuit of this embodiment is further provided with an inductor L1 in series, which can be used to suppress the interference of power noise and keep the potential at the point a stable.
Meanwhile, in the embodiment, an isolation capacitor C1 is further disposed between the antenna interface and the first output terminal J1, so that direct current can be effectively isolated, and radio frequency signals are prevented from being interfered.
Therefore, the embodiment can realize intelligent switching between the internal antenna and the external antenna without software algorithm and by only a simple circuit, and is flexible, convenient and reliable in performance.
Referring to fig. 3, this embodiment further provides a wireless router, which includes an internal antenna, a radio frequency circuit, an external antenna that can be plugged and unplugged, and an intelligent antenna switching device, where one end of the intelligent antenna switching device is connected to the radio frequency circuit, and the other end of the intelligent antenna switching device is connected to the internal antenna and the antenna interface, respectively, and the intelligent antenna switching device can switch to the connection between the radio frequency circuit and the external antenna to enable the external antenna when detecting that the external antenna is plugged into the antenna interface. And when detecting that the external antenna is removed, automatically switching back the connection between the internal antenna and the radio frequency circuit to start the internal antenna.
It can be understood that the utility model discloses not only limit only wireless router, any adoption the utility model discloses a scheme, the electronic equipment who uses the antenna to carry out radiofrequency signal receiving and dispatching all should cover within the scope of protection of the utility model.
To sum up, the utility model discloses based on the hardware mode completely, adopt change over switch and control circuit to carry out intelligent control for when external antenna inserts on the equipment, automatic switch is for using external antenna, when removing external antenna from the equipment, and automatic switch is to using internal antenna. The scheme is flexible and convenient to switch, software algorithm is not needed, the method can be realized by a simple circuit, the product research and development period is short, and the production cost is low.
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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (8)
1. The intelligent antenna switching device is used for intelligently switching an internal antenna and an external antenna, and is characterized by comprising a switch, wherein the switch is provided with two input ends and two output ends, the intelligent antenna switching device also comprises an antenna interface for inserting the external antenna, the switch is connected with a control circuit, the control circuit is suitable for starting the external antenna when the external antenna is inserted into the antenna interface, and starting the internal antenna when the external antenna is pulled out from the antenna interface.
2. The antenna intelligent switching device of claim 1, wherein: the change-over switch is provided with a radio frequency signal input end, a first input end, a second input end, a first output end and a second output end, and when the voltage of the first input end is greater than a preset value, the radio frequency signal input end is communicated with the antenna interface through the first output end; and when the voltage of the second input end is greater than a preset value, the radio-frequency signal input end is communicated with the built-in antenna through the second output end.
3. The antenna intelligent switching device of claim 2, wherein: the control circuit comprises a voltage division circuit and a triode, the base electrode of the triode is respectively connected with the antenna interface and the second input end, the collector electrode of the triode is connected with a high potential after being connected with the first input end in parallel, and the emitter electrode of the triode is grounded; the voltage division circuit is connected with the antenna interface, divides the voltage with the antenna interface and then loads the voltage to the base electrode of the triode so as to control the on-off of the triode.
4. The antenna intelligent switching device of claim 3, wherein: the high potential is 3-3.5V, and the preset value is 2-2.5V.
5. The antenna intelligent switching device of claim 3, wherein: the voltage division circuit comprises a power supply and a voltage division resistor, the voltage of the power supply is 3-3.5V, and the resistance value of the voltage division resistor meets the following conditions:
Vcc*Rz/R1<0.7；
where Vcc is the supply voltage, RzIs the equivalent impedance of an external antenna, R1Is a voltage dividing resistor.
6. The antenna intelligent switching device of claim 5, wherein: the voltage division circuit is also provided with an inductor in series for inhibiting power supply noise interference.
7. The antenna intelligent switching device of claim 5, wherein: an isolation capacitor is further arranged between the antenna interface and the first output end.
8. The utility model provides a wireless router, includes built-in antenna, radio frequency circuit and the external antenna that can insert and dial which characterized in that: the antenna intelligent switching device as claimed in any one of claims 1 to 7, wherein one end of the antenna intelligent switching device is connected to the radio frequency circuit, and the other end of the antenna intelligent switching device is connected to the internal antenna and the antenna interface respectively, and the antenna intelligent switching device is adapted to switch to connect the radio frequency circuit and the external antenna when detecting that the external antenna is inserted into the antenna interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021478631.1U CN212305329U (en) | 2020-07-24 | 2020-07-24 | Antenna intelligent switching device and wireless router |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021478631.1U CN212305329U (en) | 2020-07-24 | 2020-07-24 | Antenna intelligent switching device and wireless router |
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| CN212305329U true CN212305329U (en) | 2021-01-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111817747A (en) * | 2020-07-24 | 2020-10-23 | 深圳市友华通信技术有限公司 | Antenna intelligent switching device and wireless router |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111817747A (en) * | 2020-07-24 | 2020-10-23 | 深圳市友华通信技术有限公司 | Antenna intelligent switching device and wireless router |
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