CN214256256U - Antenna amplifier and antenna device - Google Patents
Antenna amplifier and antenna device Download PDFInfo
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- CN214256256U CN214256256U CN202120095531.9U CN202120095531U CN214256256U CN 214256256 U CN214256256 U CN 214256256U CN 202120095531 U CN202120095531 U CN 202120095531U CN 214256256 U CN214256256 U CN 214256256U
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Abstract
The embodiment of the utility model discloses an antenna amplifier and an antenna device, wherein the antenna amplifier is used for being connected with a multimedia host, the antenna amplifier comprises a first filtering module, a signal amplifying module, a second filtering module and a power supply module, wherein the first filtering module is connected with an antenna and used for filtering an input signal of the antenna, the signal amplifying module is connected with the first filtering module and used for amplifying the filtered input signal, the second filtering module is connected with the signal amplifying module and used for filtering an output signal of the signal amplifying module, the power module is respectively connected with the input power supply and the signal amplification module, and is used for converting the input power supply into a power supply to provide power supply voltage for the signal amplification module. By the mode, higher and more stable voltage gain can be realized.
Description
Technical Field
The utility model relates to an antenna technology field especially relates to an antenna amplifier and antenna device.
Background
In recent years, multimedia hosts on vehicles are widely popularized, and these vehicle systems all use receiving antennas of related signals, and usually have various corresponding signal amplifiers, and these amplifiers amplify weak received signals to provide the signals for the multimedia hosts to play.
However, the voltage gain of the circuit in the conventional signal amplifier is small when the circuit is directly loaded, so that the signal amplification effect is poor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an aim at providing an antenna amplifier circuit and antenna amplifier, the utility model discloses can realize higher and more stable voltage gain.
In order to achieve the above object, in a first aspect, the present invention provides an antenna amplifier for connecting with a multimedia host, the antenna amplifier circuit comprising:
the first filtering module is connected with the antenna and is used for filtering an input signal of the antenna;
the signal amplification module is connected with the first filtering module and is used for amplifying the filtered input signal;
the second filtering module is connected with the signal amplifying module and is used for filtering the output signal of the signal amplifying module so as to output a radio signal to the multimedia host;
the power module is respectively connected with the input power supply and the signal amplification module, and the power module is used for converting the input power supply into a power supply so as to provide power supply voltage for the signal amplification module.
In an alternative mode, the signal amplification module includes a first switching unit;
the first switch unit is respectively connected with the power supply module and the first filtering module;
the first switch unit is used for amplifying the filtered input signal.
In an alternative mode, the first switching unit includes a first switching tube;
the control end of the first switch tube is connected with the first filtering module, the first end of the first switch tube is grounded, and the second end of the first switch tube is connected with the power module.
In an optional manner, the signal amplification module further includes a second switching unit;
the second switch unit is respectively connected with the first switch unit, the power supply module and the second filtering module;
the second switch unit is used for isolating the first switch unit from a load so as to improve the load carrying capacity of the signal amplification module.
In an alternative mode, the second switching unit includes a second switching tube;
the control end of the second switch tube is connected with the second end of the first switch tube, the first end of the second switch tube is connected with the second filtering module, and the second end of the second switch tube is connected with the power module.
In an optional mode, the first switching tube is a field effect transistor, a gate of the field effect transistor is a control end of the first switching tube, a source of the field effect transistor is a first end of the first switching tube, and a drain of the field effect transistor is a second end of the first switching tube;
and/or the presence of a gas in the gas,
the second switch tube is a triode, the base of the triode is the control end of the second switch tube, the emitter of the triode is the first end of the second switch tube, and the collector of the triode is the second end of the second switch tube.
In an optional manner, the first filtering module includes a first inductor and a first capacitor;
one end of the first inductor is connected with the antenna, the other end of the first inductor is connected with one end of the first capacitor, and the other end of the first capacitor is connected with the signal amplification module.
In an optional manner, the second filtering module includes a second inductor and a second capacitor;
one end of the second inductor is connected with the signal amplification module, the other end of the second inductor is connected with one end of the second capacitor, and the other end of the second capacitor is connected with the multimedia host.
In an alternative mode, the power supply module includes a power conversion unit;
the input end of the power supply conversion unit is connected with the input power supply, and the output end of the power supply conversion unit is connected with the signal amplification module.
In a second aspect, the present invention further provides an antenna device, which includes an antenna and an antenna amplifier as described above.
The embodiment of the utility model provides a beneficial effect is: the utility model provides an antenna amplifier used for connecting with a multimedia host, which comprises a first filtering module, a signal amplifying module, a second filtering module and a power module, wherein the first filtering module is connected with the antenna, the first filtering module is used for filtering the input signal of the antenna, the signal amplifying module is connected with the first filtering module, the signal amplifying module is used for amplifying the filtered input signal, the second filtering module is connected with the signal amplifying module, the second filtering module is used for filtering the output signal of the signal amplifying module, to output the radio signal to the multimedia host, the power module is connected with the input power and the signal amplification module respectively, the power module is used for converting the input power into the power supply, the power supply voltage is provided for the signal amplification module, and high and stable voltage gain can be achieved through the mode.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of the connection between an antenna amplifier and an external device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the antenna amplifier according to another embodiment of the present invention connected to an external device;
fig. 3 is a schematic circuit diagram of a first filtering module, a signal amplifying module and a second filtering module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a power module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1, fig. 1 is a schematic structural diagram illustrating an antenna amplifier according to an embodiment of the present invention connected to an external device, as shown in fig. 1, the antenna amplifier 10 includes a first filtering module 101, a signal amplifying module 102, a second filtering module 103 and a power module 104, wherein the first filtering module 101 is connected to an antenna 20, the signal amplifying module 102 is respectively connected to the power module 104 and the second filtering module 103, the power module 104 is connected to an input power 30, and the second filtering module 103 is connected to a multimedia host 40.
Specifically, the first filtering module 101 is configured to filter an input signal of the antenna 20, the signal amplifying module 102 is configured to amplify the filtered input signal, the second filtering module 103 is configured to filter an output signal of the signal amplifying module 102 to output a radio signal to the multimedia host, and the power supply module 104 is configured to convert the input power 40 into a power supply to provide a power supply voltage for the signal amplifying module 102. That is, when the antenna 20 receives a signal, the signal is transmitted to the first filtering unit 101, the first filtering unit 101 filters the signal input by the antenna 20, and transmits the filtered signal to the signal amplifying module 102, the signal amplifying module 102 amplifies a weak signal received by the antenna 20, and transmits the weak signal to the multimedia host 40 after filtering by the second filtering module 103, so that the signal received by the weak antenna 20 is amplified by a high stable voltage gain, a good-quality radio signal is provided for the multimedia host 40 such as a vehicle to meet the corresponding functional requirement, and the power supply module 104 provides a working voltage for the signal amplifying module 102, so as to achieve the signal amplifying process of the circuit.
In an embodiment, as shown in fig. 2, the signal amplifying module 102 includes a first switch unit 1021 and a second switch unit 1022, wherein the first switch unit 1021 is connected to the first filtering module 101, the power module 104, and the second switch unit 1022 respectively, and the second switch unit 1022 is further connected to the second filtering module 103.
Specifically, the first switch unit 1021 is configured to amplify the signal filtered by the first filtering module 101, and the second switch unit 1022 is configured to implement isolation between the first switch unit 1021 and the load, so that the first switch unit 1021 and the load are isolated from each other for amplification, and they do not interfere with each other, thereby achieving a higher voltage gain.
Referring to fig. 3 in conjunction with fig. 2, the first switch unit 1021 includes a first switch Q1, and the second switch unit 1022 includes a second switch Q2.
It is understood that the first switch Q1 and the second switch Q2 may be implemented by one of a transistor, a field effect transistor, or an IGBT switch, and meanwhile, the first switch Q1 and the second switch Q2 may be the same or different, for example, the first switch Q1 is implemented by a field effect transistor, and the second switch Q2 is implemented by a transistor.
Taking an example that the first switching tube Q1 is a field effect transistor and the second switching tube Q2 is a triode as an example, at this time, a gate of the field effect transistor is a control end of the first switching tube Q1, a source of the field effect transistor is a first end of the first switching tube Q1, and a drain of the field effect transistor is a second end of the first switching tube; the base of the triode is the control end of the second switch tube Q2, the emitter of the triode is the first end of the second switch tube Q2, and the collector of the triode is the second end of the second switch tube Q2.
The grid electrode of the field effect transistor Q1 is connected with the first filtering module 101, the source electrode of the field effect transistor Q1 is grounded, and the drain electrode of the field effect transistor Q1 is connected with the power supply module 104; the base of the transistor Q2 is connected to the source of the fet Q1, the emitter of the transistor Q2 is connected to the second filtering module 103, and the collector of the transistor Q2 is connected to the power module 104.
Optionally, the first filtering module 101 includes a first inductor L1 and a first capacitor C1, one end of the first inductor L1 is connected to the antenna 20 through an interface S1, the other end of the first inductor L1 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is connected to the signal amplifying module 102.
Optionally, the second filtering module 103 includes a second inductor L2 and a second capacitor C2, one end of the second inductor L2 is connected to the signal amplifying module 102, the other end of the second inductor L2 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the multimedia host 40.
Optionally, the antenna amplifier further includes an electrostatic suppressor D1, an electrostatic suppressor D2, and a resistor R6, the first switch unit 1021 further includes a resistor R1, a resistor R2, a resistor R3, a resistor R8, a capacitor C3, a capacitor C4, and a capacitor C5, the second switch unit 1022 further includes a resistor R4, a resistor R5, and a capacitor C6, and connection relationships among the respective components are shown in fig. 3, and are not described herein again.
In practical applications, a signal received by the antenna 20 is transmitted to the antenna amplifier 104 through the interface S1, and the signal is first filtered by a filter consisting of L1 and C1 to remove noise contained in the signal. Then, the signal is amplified through a fet Q1, wherein a resistor R2 is used as a ground load of the fet Q1 to enable the fet Q1 to operate, i.e., to switch the switching state, a capacitor C3 is used to further filter the signal, a resistor R2 and a capacitor C4 are used as a bypass resistor and a bypass capacitor, respectively, the resistor R2 is used to adjust the amplification factor of the fet Q1, and the capacitor C4 is used to provide a path for an ac signal; the transistor Q2 is used as an emitter follower, the input resistance is high, the efficiency of transmitting signal source signal is high, the output resistance is low, the load carrying capacity is strong, the voltage amplification factor is less than 1 and close to 1, and the output voltage is the same as the input voltage phase, and has the following characteristic, so in practice, the transistor Q2 is widely used as an output stage or an intermediate isolation stage, and it can be understood that the emitter follower circuit has no voltage amplification function, but still has the current amplification function, and thus has the power amplification function. If the transistor Q2 is not connected and the fet Q1 is directly connected to the multimedia host, the multimedia host will adversely affect the fet Q1, and the operating state of the fet will be affected, which results in a smaller and unstable voltage gain of the fet Q1. Therefore, the emitter follower is provided, so that the first switch unit 1021 serving as the amplifier circuit and the load branch (i.e., the multimedia host) can be isolated from each other without interfering with each other, and the amplifier circuit can operate normally. Finally, the signal output by the transistor Q2 is filtered by a filter composed of L2 and C2, and then transmitted to the multimedia host through the interface S2. The static electricity suppressor D1 and the static electricity suppressor D2 are both provided to eliminate static electricity, for example, static electricity generated by friction.
It should be noted that the hardware configuration of the antenna amplifier 10 as shown in fig. 1 or fig. 2 is merely an example, and that the antenna amplifier 10 may have more or less components than those shown in the figures, may combine two or more components, or may have a different configuration of components, and that the various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits. For example, in order to reduce the cost, only the first switch unit 1021 may be selected and the second switch unit 1022 may be omitted.
In another embodiment, as shown in fig. 4, the power module 104 includes a power conversion unit U1, an input terminal of the power conversion unit U1 is connected to the input power V0, and an output terminal of the power conversion unit U1 is connected to the signal amplification module 102, wherein the power conversion unit U1 may adopt a 78L08 voltage regulator, and the input power is converted into a stable required voltage by the voltage regulator.
Optionally, the power module 104 further includes a capacitor C7, a capacitor C8, a capacitor C9, and a capacitor C10, wherein one of the capacitor C7 and the capacitor C8 filters high-frequency interference, and the other filters low-frequency interference; similarly, one of the capacitor C9 and the capacitor C10 filters out high frequency interference, and the other one filters out low frequency interference, so that the input voltage and the output voltage of the power conversion unit U1 can be more stable.
The embodiment of the utility model provides an embodiment still provides an antenna device, wherein, this antenna device include antenna and above-mentioned embodiment antenna amplifier 10, antenna amplifier 10 is used for being connected with antenna and multimedia host respectively, antenna amplifier 10 can be with antenna received signal amplification back transmission to multimedia host to realize the corresponding functional requirement of multimedia host.
The utility model provides an antenna amplifier 10 is used for being connected with multimedia host 40, this antenna amplifier 10 includes first filter module 101, signal amplification module 102, second filter module 103 and power module 104, first filter module 101 is connected with antenna 20, first filter module 101 is used for filtering the input signal of antenna 20, signal amplification module 102 is connected with first filter module 101, signal amplification module 102 is used for amplifying the input signal after the filtration, second filter module 103 is connected with signal amplification module 102, second filter module 103 is used for filtering the output signal of signal amplification module 102, in order to export the radio signal to multimedia host 40, power module 104 is connected with input power 30 and signal amplification module 102 respectively, power module 104 is used for converting input power 30 into power supply, for signal amplification module 102 provides supply voltage, by the mode, higher and more stable voltage gain can be realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An antenna amplifier circuit for connection to a multimedia host, the antenna amplifier circuit comprising:
the first filtering module is connected with the antenna and is used for filtering an input signal of the antenna;
the signal amplification module is connected with the first filtering module and is used for amplifying the filtered input signal;
the second filtering module is connected with the signal amplifying module and is used for filtering the output signal of the signal amplifying module so as to output a radio signal to the multimedia host;
the power module is respectively connected with the input power supply and the signal amplification module, and the power module is used for converting the input power supply into a power supply so as to provide power supply voltage for the signal amplification module.
2. The antenna amplifier of claim 1,
the signal amplification module comprises a first switch unit;
the first switch unit is respectively connected with the power supply module and the first filtering module;
the first switch unit is used for amplifying the filtered input signal.
3. The antenna amplifier of claim 2,
the first switch unit comprises a first switch tube;
the control end of the first switch tube is connected with the first filtering module, the first end of the first switch tube is grounded, and the second end of the first switch tube is connected with the power module.
4. The antenna amplifier of claim 3,
the signal amplification module further comprises a second switch unit;
the second switch unit is respectively connected with the first switch unit, the power supply module and the second filtering module;
the second switch unit is used for isolating the first switch unit from a load so as to improve the load carrying capacity of the signal amplification module.
5. The antenna amplifier of claim 4,
the second switch unit comprises a second switch tube;
the control end of the second switch tube is connected with the second end of the first switch tube, the first end of the second switch tube is connected with the second filtering module, and the second end of the second switch tube is connected with the power module.
6. The antenna amplifier of claim 5,
the first switch tube is a field effect tube, the grid electrode of the field effect tube is the control end of the first switch tube, the source electrode of the field effect tube is the first end of the first switch tube, and the drain electrode of the field effect tube is the second end of the first switch tube;
and/or the presence of a gas in the gas,
the second switch tube is a triode, the base of the triode is the control end of the second switch tube, the emitter of the triode is the first end of the second switch tube, and the collector of the triode is the second end of the second switch tube.
7. The antenna amplifier of claim 1,
the first filtering module comprises a first inductor and a first capacitor;
one end of the first inductor is connected with the antenna, the other end of the first inductor is connected with one end of the first capacitor, and the other end of the first capacitor is connected with the signal amplification module.
8. The antenna amplifier of claim 1,
the second filtering module comprises a second inductor and a second capacitor;
one end of the second inductor is connected with the signal amplification module, the other end of the second inductor is connected with one end of the second capacitor, and the other end of the second capacitor is connected with the multimedia host.
9. The antenna amplifier of claim 1,
the power supply module comprises a power supply conversion unit;
the input end of the power supply conversion unit is connected with the input power supply, and the output end of the power supply conversion unit is connected with the signal amplification module.
10. An antenna arrangement, characterized in that the antenna arrangement comprises an antenna and an antenna amplifier according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120095531.9U CN214256256U (en) | 2021-01-13 | 2021-01-13 | Antenna amplifier and antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120095531.9U CN214256256U (en) | 2021-01-13 | 2021-01-13 | Antenna amplifier and antenna device |
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| Publication Number | Publication Date |
|---|---|
| CN214256256U true CN214256256U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120095531.9U Active CN214256256U (en) | 2021-01-13 | 2021-01-13 | Antenna amplifier and antenna device |
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| CN (1) | CN214256256U (en) |
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- 2021-01-13 CN CN202120095531.9U patent/CN214256256U/en active Active
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