CN214756257U - Low-noise amplifier module - Google Patents
Low-noise amplifier module Download PDFInfo
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- CN214756257U CN214756257U CN202120752674.2U CN202120752674U CN214756257U CN 214756257 U CN214756257 U CN 214756257U CN 202120752674 U CN202120752674 U CN 202120752674U CN 214756257 U CN214756257 U CN 214756257U
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Abstract
The utility model discloses a low noise amplifier module, including low noise amplifier circuit, low pass filter circuit, equalizer circuit, power amplifier circuit, high pass filter circuit, get electric circuit and voltage conversion circuit, radio frequency input signal RFin is connected to low noise amplifier circuit's input, and low pass filter circuit's input is connected to low noise amplifier circuit's output, and equalizer circuit's input is connected to low pass filter circuit's output, and power amplifier circuit's input is connected to equalizer circuit's output, and high pass filter circuit's input is connected to power amplifier circuit's output, and radio frequency output interface RFout is connected to high pass filter circuit's output. The low noise amplifier module simplifies the circuit, reduces the cost and improves the yield rate under the condition of meeting the requirements of gain, noise coefficient, dynamic range and out-of-band inhibition indexes.
Description
Technical Field
The utility model relates to a communication module technical field specifically is a low noise amplifier module.
Background
The low noise amplifier is a very important part in modern applications such as wireless communication, mobile communication, radar, remote measurement and control, satellite communication, electronic countermeasure system and the like, is commonly used at the front end of a receiving system, and is used for inhibiting noise interference and out-of-band signals while amplifying signals and improving the sensitivity of the system. However, the low-noise amplifier circuit of the existing signal has complex design and high cost, so that the use requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low noise amplifier module, satisfying under gain, noise figure, dynamic range, outband restrain the index requirement, simplify circuit, reduce cost, improve the yield, can solve the problem among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme: a low noise amplifier module comprises a low noise amplifier circuit, a low pass filter circuit, an equalizer circuit, a power amplifier circuit, a high pass filter circuit, a power supply circuit and a voltage conversion circuit, the input end of the low-noise amplifier circuit is connected with a radio frequency input signal RFin, the output end of the low-noise amplifier circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the equalizer circuit, the output end of the equalizer circuit is connected with the input end of the power amplifier circuit, the output end of the power amplifier circuit is connected with the input end of the high-pass filter circuit, the output end of the high-pass filter circuit is connected with a radio frequency output interface RFout, the output end of the power taking circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is respectively connected with the input ends of the low-pass filter circuit and the power amplifier circuit.
Preferably, the low noise amplifier circuit is composed of a chip U1, pin 3 of the chip U1 is connected to a capacitor C5, a capacitor C5 is connected to a capacitor L3 and then to a radio frequency input signal RFin, pin 4 of the chip U1 is connected to a capacitor C6 and an inductor L4, a capacitor C3 and a capacitor C1 are connected to an inductor L4 and then to a voltage of 3.3V, the low pass filter circuit is composed of a chip U2, pin 1 of the chip U2 is connected to a capacitor C6, and pin 3 of the chip U2 is connected to an inductor L5 and an inductor L6.
Preferably, the equalizer circuit is composed of an inductor L, a resistor R, a capacitor C and a capacitor C, wherein the resistor R is connected in series with the resistor R, the resistor R is connected with the inductor L and the inductor L, the resistor R is connected with the inductor L, the resistor R is connected in series with the capacitor C, the resistor R is connected with a circuit interface in series with the resistor R, the capacitor C is connected with a circuit interface in series with the capacitor C and the inductor L, the capacitor C is connected in series with the inductor L, the capacitor C is connected with a circuit interface of the resistor R, the inductor L is connected with a circuit interface of the resistor R, and the inductor L is connected in parallel with the capacitor C and the inductor L.
Preferably, the power amplifier circuit is composed of a chip U3, a pin 1 of the chip U3 is connected with a capacitor C4, a capacitor C4 is connected with an inductor L7 and an inductor L8, a pin 3 of the chip U3 is connected with a capacitor C15 and an inductor L11, an inductor L11 is connected with a capacitor C11 and a capacitor C9 and then connected with a voltage of 3.3V, the high-pass filter circuit is composed of a chip U5, a pin 1 of the chip U5 is connected with a capacitor C15, and a pin 3 of the chip U5 is connected with a capacitor C14 and then connected with a radio frequency output port RFout.
Preferably, the power-taking circuit is composed of an inductor L10 and a capacitor C10, the inductor L10 is connected with the voltages of the capacitors C10 and 5V, the inductor L10 is connected with the circuit interface of the capacitor C14, the voltage conversion circuit is composed of a chip U4, a pin 3 of the chip U4 is connected with the voltages of the capacitors C12 and 5V, a pin 2 of the chip U4 is connected with the capacitor C13, then the voltage of 3.3V is output, and the capacitor C13 is connected with the circuit interface of the inductor L4 and the inductor L11.
Preferably, the model of the chip U1 is GRF2105, the model of the chip U2 is LFCN-3000, the model of the chip U3 is PGA-102+, the model of the chip U5 is HFCN-880, and the model of the chip U4 is AMS 1117-3.3.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the low-noise amplifier module takes a low-noise amplifier circuit as the first stage of the module, has very low noise coefficient, high gain and large dynamic range, determines the index of the whole module, a low-pass filter circuit can filter out high-frequency interference signals outside a working frequency band, an equalizer circuit is used for compensating low-frequency signals with small loss and high-frequency signals with large loss, a power amplifier circuit amplifies received signals again, a high-pass filter circuit filters out low-frequency interference signals outside the working frequency band, and a power taking circuit adopts a method that a radio frequency channel supplies direct current to supply power for the low-noise amplifier module. The voltage conversion circuit converts the 5V voltage into a 3.3V voltage used by the low noise amplifier and the power amplifier; therefore, the circuit module simplifies the circuit, reduces the cost and improves the yield rate under the condition of meeting the requirements of gain, noise coefficient, dynamic range and out-of-band rejection indexes, thereby effectively solving the problems in the prior art.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a circuit diagram of a low noise amplifier and a low pass filter according to the present invention;
fig. 3 is a circuit diagram of the equalizer of the present invention;
fig. 4 is a circuit diagram of a power amplifier and a high-pass filter according to the present invention;
FIG. 5 is a circuit diagram of the present invention;
fig. 6 is a voltage conversion circuit diagram of the present invention;
fig. 7 is a circuit connection diagram of the present invention.
In the figure: 1. a low noise amplifier circuit; 2. a low-pass filter circuit; 3. an equalizer circuit; 4. a power amplifier circuit; 5. a high pass filter circuit; 6. a power taking circuit; 7. a voltage conversion circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 7, a low noise amplifier module includes a low noise amplifier circuit 1, a low pass filter circuit 2, an equalizer circuit 3, a power amplifier circuit 4, a high pass filter circuit 5, a power taking circuit 6 and a voltage converting circuit 7, wherein an input end of the low noise amplifier circuit 1 is connected to a radio frequency input signal RFin, an output end of the low noise amplifier circuit 1 is connected to an input end of the low pass filter circuit 2, an output end of the low pass filter circuit 2 is connected to an input end of the equalizer circuit 3, an output end of the equalizer circuit 3 is connected to an input end of the power amplifier circuit 4, an output end of the power amplifier circuit 4 is connected to an input end of the high pass filter circuit 5, an output end of the high pass filter circuit 5 is connected to a radio frequency output interface RFout, an output end of the power taking circuit 6 is connected to an input end of the voltage converting circuit 7, and output ends of the voltage converting circuit 7 are respectively connected to the low pass filter circuit 2 and an input end of the power amplifier circuit 4 And (4) an end.
Referring to fig. 2, the low noise amplifier circuit 1 is composed of a chip U1, a pin 3 of the chip U1 is connected to a capacitor C5, a capacitor C5 is connected to a capacitor L3 and then to a radio frequency input signal RFin, a pin 4 of the chip U1 is connected to a capacitor C6 and an inductor L4, a capacitor C3 and a capacitor C1 are connected to a capacitor L4 and then to a voltage of 3.3V, the low pass filter circuit 2 is composed of a chip U2, a pin 1 of the chip U2 is connected to a capacitor C6, and a pin 3 of the chip U2 is connected to a capacitor L5 and a capacitor L6.
In the above, the radio frequency input signal enters the chip U1 through the inductor L3 and the capacitor C5, is amplified and output through the chip U1, and enters the chip U2 through the inductor L4 and the capacitor C6; the inductor L3 and the capacitor C5 have the function of input port impedance matching, the inductor L4 and the capacitor C6 have the function of output port impedance matching, meanwhile, the capacitor C5 and the capacitor C6 have the function of cutting off direct current, the capacitor C1 and the capacitor C3 filter input 3.3V direct current signals, the capacitor C1 mainly filters low-frequency noise, and the capacitor C3 mainly filters high-frequency noise.
Referring to fig. 3, the equalizer circuit 3 is composed of an inductor L, a resistor R, a capacitor C, and a capacitor C, where the resistor R is connected in series with the resistor R, the resistor R is connected with the inductor L, the resistor R is connected in series with the capacitor C, the resistor R is connected with a circuit interface where the resistor R is connected in series with the resistor R, the capacitor C is connected with a circuit interface where the capacitor C is connected in series with the inductor L, the inductor L is connected with a circuit interface of the resistor R, and the inductor L is connected in parallel with the capacitor C and the inductor L.
In the above, the inductor L5 and the inductor L6 play a role in input port impedance matching, the capacitor C7 and the capacitor C8 play a role in output port impedance matching, the resistor R1, the resistor R2 and the resistor R3 form a pi-type attenuator, the attenuation of the attenuator is the balance of an equalizer, the capacitor C2 and the inductor L2 form a series resonant circuit, the resonant frequency is greater than or equal to the maximum value of the module operating frequency, the capacitor C2, the inductors L1 and L2 form parallel resonance, the resonant frequency is less than or equal to the minimum value of the module operating frequency, the capacitor C7 and the inductor L9 form a series resonant circuit, the resonant frequency is less than or equal to the minimum value of the module operating frequency, the capacitor C8 and the inductor L9 form parallel resonance, and the resonant frequency is greater than or equal to the maximum value of the module operating frequency.
Referring to fig. 4, the power amplifier circuit 4 is composed of a chip U3, a pin 1 of the chip U3 is connected to a capacitor C4, a capacitor C4 is connected to an inductor L7 and an inductor L8, a pin 3 of the chip U3 is connected to a capacitor C15 and an inductor L11, an inductor L11 is connected to a capacitor C11 and a capacitor C9, and then the voltage is connected to 3.3V, the high-pass filter circuit 5 is composed of a chip U5, a pin 1 of the chip U5 is connected to a capacitor C15, and a pin 3 of the chip U5 is connected to a capacitor C14 and then the radio frequency output port RFout.
In the above, a signal output by the equalizer circuit 3 enters the chip U3 through the capacitor C4, and is amplified and output through the chip U3, the capacitor C4 and the capacitor C15 play a role in blocking direct current, the inductor L11 prevents a radio frequency signal from entering a 3.3V power supply, the capacitor C9 and the capacitor C11 filter an input 3.3V direct current signal, the capacitor C9 mainly filters low-frequency noise, and the capacitor C11 mainly filters high-frequency noise.
Referring to fig. 5-6, the power-taking circuit 6 includes an inductor L10 and a capacitor C10, the inductor L10 is connected to the voltages of the capacitors C10 and C5V, the inductor L10 is connected to the circuit interface of the capacitor C14, the voltage conversion circuit 7 includes a chip U4, a pin 3 of the chip U4 is connected to the voltages of the capacitors C12 and C5V, a pin 2 of the chip U4 is connected to the capacitor C13, and then outputs the voltage of 3.3V, and the capacitor C13 is connected to the circuit interfaces of the inductor L4 and the inductor L11.
In the above, the power-taking circuit 6 introduces the dc 5V power supply at the rf output port RFout into the voltage conversion circuit 7, wherein the capacitor C14 prevents dc from entering the chip U5, the inductor L10 prevents rf signals from entering the voltage conversion circuit 7, and allows dc to enter the voltage conversion circuit 7, and the capacitor C10 filters the dc 5V power supply.
In the above, the model of the chip U1 is GRF2105, the model of the chip U2 is LFCN-3000, the model of the chip U3 is PGA-102+, the model of the chip U5 is HFCN-880, and the model of the chip U4 is AMS 1117-3.3.
In summary, the following steps: the low-noise amplifier module takes a low-noise amplifier circuit 1 as the first stage of the module, has very low noise coefficient, high gain and large dynamic range, determines the index of the whole module, a low-pass filter circuit 2 can filter out high-frequency interference signals outside a working frequency band, an equalizer circuit 3 is used for compensating low-frequency signals with low loss and high-frequency signals with large loss, a power amplifier circuit 4 amplifies received signals again, a high-pass filter circuit 5 filters out low-frequency interference signals outside the working frequency band, and a power taking circuit 6 adopts a method of supplying direct current through a radio frequency channel to supply power for the low-noise amplifier module. The voltage conversion circuit 7 converts the 5V voltage into a 3.3V voltage used by the low noise amplifier and the power amplifier; therefore, the circuit module simplifies the circuit, reduces the cost and improves the yield rate under the condition of meeting the requirements of gain, noise coefficient, dynamic range and out-of-band rejection indexes, thereby effectively solving the problems in the prior art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A low noise amplifier module includes a low noise amplifier circuit (1), a low pass filter circuit (2), an equalizer circuit (3), a power amplifier circuit (4), a high pass filter circuit (5), a power taking circuit (6) and a voltage conversion circuit (7), and is characterized in that: the input end of the low-noise amplifier circuit (1) is connected with a radio frequency input signal RFin, the output end of the low-noise amplifier circuit (1) is connected with the input end of the low-pass filter circuit (2), the output end of the low-pass filter circuit (2) is connected with the input end of the equalizer circuit (3), the output end of the equalizer circuit (3) is connected with the input end of the power amplifier circuit (4), the output end of the power amplifier circuit (4) is connected with the input end of the high-pass filter circuit (5), the output end of the high-pass filter circuit (5) is connected with a radio frequency output interface RFout, the output end of the power taking circuit (6) is connected with the input end of the voltage conversion circuit (7), and the output end of the voltage conversion circuit (7) is respectively connected with the input ends of the low-pass filter circuit (2) and the power amplifier circuit (4).
2. A low noise amplifier module according to claim 1, wherein: the low-noise amplifier circuit (1) is composed of a chip U1, a pin 3 of the chip U1 is connected with a capacitor C5, a capacitor C5 is connected with a capacitor L3 and then connected with a radio frequency input signal RFin, a pin 4 of the chip U1 is connected with a capacitor C6 and an inductor L4, a capacitor L4 is connected with a capacitor C3 and a capacitor C1 and then connected with a voltage of 3.3V, the low-pass filter circuit (2) is composed of a chip U2, a pin 1 of the chip U2 is connected with a capacitor C6, and a pin 3 of the chip U2 is connected with an inductor L5 and an inductor L6.
3. A low noise amplifier module according to claim 1, wherein: the equalizer circuit (3) is composed of an inductor L, a resistor R, a capacitor C and a capacitor C, wherein the resistor R is connected with the resistor R in series, the resistor R is connected with the inductor L and the inductor L, the resistor R is connected with the inductor L and the capacitor C in series, the resistor R is connected with the circuit interface in series with the resistor R and the capacitor C in series, the capacitor C is connected with the circuit interface in series with the inductor L and the capacitor C is connected with the circuit interface in series with the inductor L, the capacitor C is connected with the inductor L in series, the capacitor C is connected with the circuit interface of the resistor R, the inductor L is connected with the circuit interface of the resistor R, and the inductor L is connected with the capacitor C and the inductor L in parallel.
4. A low noise amplifier module according to claim 2, wherein: the power amplifier circuit (4) is composed of a chip U3, a pin 1 of a chip U3 is connected with a capacitor C4, a capacitor C4 is connected with an inductor L7 and an inductor L8, a pin 3 of the chip U3 is connected with a capacitor C15 and an inductor L11, an inductor L11 is connected with a capacitor C11 and a capacitor C9 and then connected with 3.3V voltage, the high-pass filter circuit (5) is composed of a chip U5, a pin 1 of a chip U5 is connected with a capacitor C15, and a pin 3 of a chip U5 is connected with a capacitor C14 and then connected with a radio frequency output port RFout.
5. A low noise amplifier module according to claim 4, wherein: the power-taking circuit (6) is composed of an inductor L10 and a capacitor C10, the inductor L10 is connected with the voltages of the capacitor C10 and the capacitor 5V, the inductor L10 is connected with a circuit interface of the capacitor C14, the voltage conversion circuit (7) is composed of a chip U4, a pin 3 of the chip U4 is connected with the voltages of the capacitor C12 and the capacitor 5V, a pin 2 of the chip U4 is connected with the capacitor C13 to output the voltage of 3.3V, and the capacitor C13 is connected with the circuit interface of the inductor L4 and the inductor L11.
6. A low noise amplifier module according to claim 2, wherein: the model of the chip U1 is GRF2105, and the model of the chip U2 is LFCN-3000.
7. A low noise amplifier module according to claim 4, wherein: the model of the chip U3 is PGA-102+, and the model of the chip U5 is HFCN-880.
8. A low noise amplifier module according to claim 5, wherein: the model number of the chip U4 is AMS 1117-3.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120752674.2U CN214756257U (en) | 2021-04-14 | 2021-04-14 | Low-noise amplifier module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120752674.2U CN214756257U (en) | 2021-04-14 | 2021-04-14 | Low-noise amplifier module |
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| Publication Number | Publication Date |
|---|---|
| CN214756257U true CN214756257U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120752674.2U Active CN214756257U (en) | 2021-04-14 | 2021-04-14 | Low-noise amplifier module |
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|---|---|
| CN (1) | CN214756257U (en) |
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2021
- 2021-04-14 CN CN202120752674.2U patent/CN214756257U/en active Active
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