Split type radio frequency gain amplifier

Abstract

The utility model relates to a split type radio frequency gain amplifier which comprises a gain module and a driving module which are independently arranged, the gain module and the driving module are directly connected through a wire harness, the gain module comprises a gain circuit and a frequency mixing circuit which are connected in series, and the driving module comprises a main control circuit and a driving circuit which are connected. The signal output end of the driving circuit is connected with the gain circuit and the frequency mixing circuit through wire harnesses. The advantages of the utility model are that the gain module and the driving module are arranged independently, so that the two modules can be used independently or in a combined manner; potentiometer adjustment is replaced by DAC output, the number of potentiometers is reduced, and the adjustment precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency technology, and in particular to a split-type radio frequency gain amplifier. Background Technology

[0002] Radio frequency (RF) amplifiers consist of a gain module and a driver module. Most existing RF amplifiers employ a chassis-type design, resulting in a large overall size that is inconvenient to carry, and they cannot allow for independent use of the gain and driver modules. Furthermore, existing RF amplifiers typically require multiple potentiometers for adjustment, and manual potentiometer adjustment suffers from poor accuracy. Summary of the Invention

[0003] This invention mainly solves the above-mentioned problems by providing a split-type RF gain amplifier, which sets the gain module and the drive module independently, so that the two modules can be used independently or in combination. Furthermore, it uses the DAC output to replace the potentiometer adjustment, reducing the number of potentiometers and improving the adjustment accuracy.

[0004] The technical solution adopted by this utility model to solve its technical problem is a split-type radio frequency gain amplifier, which includes an independently set gain module and a drive module. The gain module and the drive module are directly connected by a wiring harness. The gain module includes a gain circuit and a mixer circuit connected in series. The drive module includes a main control circuit and a drive circuit connected in series. The signal output terminal of the drive circuit is connected to the gain circuit and the mixer circuit respectively through a wiring harness.

[0005] As a preferred embodiment of the above scheme, the driving circuit includes a digital-to-analog converter circuit and several signal processing circuits. The input terminal of the digital-to-analog converter circuit is connected to the main control circuit, and each output terminal of the digital-to-analog converter circuit is connected to a corresponding signal processing circuit. The signal processing circuits output signals to the gain module and the main control circuit respectively.

[0006] As a preferred embodiment of the above scheme, the signal processing circuit includes a voltage follower circuit and an inverting voltage amplifier circuit. The voltage follower circuit includes two voltage followers connected in series, and the output terminals of the two voltage followers are respectively connected to the gain module and the main control circuit. The inverting voltage amplifier circuit includes two inverting voltage amplifiers connected in series, and the output terminals of the two inverting amplifiers are respectively connected to the gain module and the main control circuit.

[0007] As a preferred embodiment of the above solution, the driving circuit includes an adjustable potentiometer, and the sliding terminal of the adjustable potentiometer outputs an adjustable voltage to the gain module.

[0008] As a preferred embodiment of the above solution, the drive module is equipped with a USB interface, an RS485 communication interface, a USB / RS485 conversion switch, an LED indicator, a power supply interface, and a display screen.

[0009] As a preferred embodiment of the above scheme, the gain circuit includes an RF signal input interface and a gain chip U2. The RF signal input terminal of the gain chip U2 is connected to the RF signal input interface, the RF signal output terminal of the gain chip U2 is connected to the mixer circuit, and the control terminal of the gain chip U2 is connected to the drive circuit.

[0010] As a preferred embodiment of the above scheme, the mixing circuit includes an RF signal output interface and a mixing chip U1. The RF signal input terminal of the mixing chip U1 is connected to the gain circuit, the RF signal output terminal of the mixing chip U1 is connected to the RF signal output interface, and the control terminal of the mixing chip U1 is connected to the drive circuit.

[0011] The advantages of this invention are: the gain module and the drive module are set independently, so that the two modules can be used independently or in combination; the use of DAC output to replace potentiometer adjustment reduces the number of potentiometers and improves adjustment accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a split-type RF gain amplifier.

[0013] Figure 2 This is a circuit block diagram of a split-type RF gain amplifier.

[0014] Figure 3 This is the circuit schematic of the main control circuit.

[0015] Figure 4 This is the circuit schematic of the drive circuit.

[0016] Figure 5 This is the circuit schematic for the gain circuit and the mixer circuit.

[0017] Figure 6 This is the circuit schematic of the power supply circuit. Detailed Implementation

[0018] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0019] Example:

[0020] This embodiment describes a split-type radio frequency gain amplifier, such as... Figure 1 and Figure 2As shown, the module includes an independently configured gain module 1 and a drive module 2. Gain module 1 and drive module 2 are directly connected via a wiring harness interface 9. Both the housings of gain module 1 and drive module 2 are made of anodized aluminum, providing excellent heat dissipation. The housing of gain module 1 has an RF signal input interface 11 and an RF signal output interface 14. The gain module contains a gain circuit 12 and a mixer circuit 13. The RF signal input interface 11, gain circuit 12, mixer circuit 13, and RF signal output interface are connected in series. The drive module's casing includes a USB interface, an RS485 communication interface, a USB / RS485 switch, LED indicators, a power supply interface, and a display screen. The drive module contains a main control circuit 3, a drive circuit, a power supply circuit 10, a USB / RS485 circuit, a display circuit, and an indicator circuit. The drive circuit includes a digital-to-analog converter circuit 4, a voltage follower circuit 5, a first inverting voltage amplifier circuit 6, a second inverting voltage amplifier circuit 7, and an adjustable potentiometer 8. The main control circuit 3 is connected to the digital-to-analog converter circuit 4. The digital-to-analog converter circuit outputs three signals, which are respectively connected to the voltage follower circuit 5, the first inverting voltage amplifier circuit 6, and the second inverting voltage amplifier circuit 7. The voltage follower circuit 5, the first inverting voltage amplifier circuit 6, and the second inverting voltage amplifier circuit 7 each output two signals: one signal is output to the main control circuit 3, and the other signal is output to the gain module 1 through the wiring harness interface 9. The voltage signal output by the adjustable potentiometer 8 is also output to the gain module through the wiring harness interface 9. In this embodiment, the USB / RS485 circuit, the display circuit, and the indicator circuit are all existing technologies.

[0021] like Figure 3 As shown, the main control circuit 3 uses the STM32F103RCT6 chip. The main control circuit 3 outputs signals to the digital-to-analog converter circuit and receives voltage signals fed back from the voltage follower circuit 5, the first inverting voltage amplifier circuit 6, and the second inverting voltage amplifier circuit 7.

[0022] like Figure 4As shown, the digital-to-analog converter circuit uses the DAC7554IDGS chip, which outputs three analog signals: / VC, / VG1, and / VG2. Signal / VC is input to voltage follower circuit 5, while signals / VG1 and / VG2 are input to the first inverting voltage amplifier circuit 6 and the second inverting voltage amplifier circuit 7, respectively. Voltage follower circuit 5 includes operational amplifiers U11C and U12C, each forming a voltage follower. Signal / VC is output from the non-inverting input of operational amplifier U11C, which outputs signal VC. Signal VC is input to the gain module and the non-inverting input of operational amplifier U12C, respectively. Operational amplifier U12C outputs signal VC_M to the main control circuit 3. The first inverting voltage amplifier circuit 6 includes operational amplifiers U11B and U12A. Operational amplifiers U11B and U12A... Each circuit forms an inverting voltage amplifier. The signal / VG1 is input from the inverting input of operational amplifier U11B, and the output of operational amplifier U11B is the signal VG1. The signal VG1 is input to the gain module and the inverting input of operational amplifier U12A. The output of operational amplifier U12A is the signal VG1_M, which is sent to the active circuit 3. The second inverting voltage amplifier circuit 7 has the same structure as the first inverting voltage amplifier circuit. The second inverting voltage amplifier circuit converts the signal / VG2 into signals VG2 and VG2_M, which are then sent to the gain module and the main control circuit 3, respectively. The adjustable potentiometer 8 is a 3313J-1-204E. The clockwise terminal of the adjustable potentiometer 8 is grounded to GND, and the counterclockwise terminal is connected to +5V. The voltage output from the sliding terminal is input to the gain module through a voltage follower.

[0023] like Figure 5 As shown, the gain circuit includes an RF signal input interface and a gain chip U2. The RF signal input terminal of the gain chip U2 is connected to the RF signal input interface, the RF signal output terminal of the gain chip U2 is connected to the mixer circuit, and the control terminal of the gain chip U2 is connected to the driver circuit. The mixer circuit includes an RF signal output interface and a mixer chip U1. The RF signal input terminal of the mixer chip U1 is connected to the gain circuit, the RF signal output terminal of the mixer chip U1 is connected to the RF signal output interface, and the control terminal of the mixer chip U1 is connected to the driver circuit. In this embodiment, the gain chip U2 uses an HMC871LC5 chip. The signal VC output from the driver module is input to the VCTL pin of the gain chip U2, and the signal VG1 is input to the VGG pin of the gain chip U2. The mixer chip U1 uses an HMC994APM5E chip. The signals VG2 and VG3 output from the driver module are input to the VGG1 and VGG2 pins of the mixer chip U1, respectively.

[0024] like Figure 6 As shown, the power supply circuit converts the 12V voltage connected to the power supply interface into different voltages for use by various circuits.

[0025] In this embodiment, the split-type RF gain amplifier independently sets up the gain module and the driver module, and uses precision-machined alumina block material to fit the RF amplifier device design and packaging, effectively solving the heat dissipation problem and avoiding the poor heat dissipation performance and instability caused by overheating after long-term operation of the original chassis design. In addition, the driver module uses a DAC output to replace the potentiometer output of the original design, changing the three potentiometers of the chassis design into one potentiometer, improving integration and effectively increasing adjustment accuracy.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A split-type radio frequency gain amplifier, characterized in that: It includes an independently configured gain module and a drive module, which are directly connected to each other via a wiring harness. The gain module includes a gain circuit and a mixer circuit connected in series, and the drive module includes a main control circuit and a drive circuit connected in series. The drive signal output terminal of the drive circuit is connected to the gain circuit and the mixer circuit via wiring harnesses respectively.

2. The split-type RF gain amplifier according to claim 1, characterized in that: The driving circuit includes a digital-to-analog converter circuit and several signal processing circuits. The input terminal of the digital-to-analog converter circuit is connected to the main control circuit, and each output terminal of the digital-to-analog converter circuit is connected to a corresponding signal processing circuit. The signal processing circuits output signals to the gain module and the main control circuit, respectively.

3. The split-type RF gain amplifier according to claim 2, characterized in that: The signal processing circuit includes a voltage follower circuit and an inverting voltage amplifier circuit. The voltage follower circuit includes two voltage followers connected in series, and the output terminals of the two voltage followers are respectively connected to the gain module and the main control circuit. The inverting voltage amplifier circuit includes two inverting voltage amplifiers connected in series, and the output terminals of the two inverting amplifiers are respectively connected to the gain module and the main control circuit.

4. The split-type RF gain amplifier according to claim 1 or 2, characterized in that: The driving circuit includes an adjustable potentiometer, and the sliding terminal of the adjustable potentiometer outputs an adjustable voltage to the gain module.

5. The split-type RF gain amplifier according to claim 1, characterized in that: The drive module is equipped with a USB interface, an RS485 communication interface, a USB / RS485 conversion switch, LED indicators, a power supply interface, and a display screen.

6. The split-type RF gain amplifier according to claim 1, characterized in that: The gain circuit includes an RF signal input interface and a gain chip U2. The RF signal input terminal of the gain chip U2 is connected to the RF signal input interface, the RF signal output terminal of the gain chip U2 is connected to the mixer circuit, and the control terminal of the gain chip U2 is connected to the drive circuit.

7. The split-type RF gain amplifier according to claim 1 or 6, characterized in that: The mixing circuit includes an RF signal output interface and a mixing chip U1. The RF signal input terminal of the mixing chip U1 is connected to the gain circuit, the RF signal output terminal of the mixing chip U1 is connected to the RF signal output interface, and the control terminal of the mixing chip U1 is connected to the drive circuit.

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