C-band high-power airborne power amplifier

Abstract

The utility model discloses a C-band high-power airborne power amplifier, and belongs to the field of microwave communication. The circuit comprises a radio frequency amplification circuit, a power supply circuit, a detection circuit, a state return circuit, a negative voltage protection circuit and a working / silence circuit. The radio frequency amplification circuit is used for amplifying the power of a radio frequency signal, the power supply circuit is used for supplying power to the radio frequency amplification circuit, the state return circuit and the negative voltage protection circuit, the detection circuit is used for converting a detection signal into a detection voltage, and the state return circuit is used for comparing the detection voltage with a reference voltage and outputting a state return signal; the working / silence circuit receives an external control signal and controls the working / silence state of the power supply circuit, and the negative voltage protection circuit ensures that the power supply circuit outputs negative voltage. The utility model has the advantages of high output power, small volume and weight, good heat dissipation and good electromagnetic compatibility, and can adapt to various complex natural environments.

Description

Technical Field

[0001] The utility model relates to the field of microwave communication, in particular to a C-band high-power airborne power amplifier. Background Art

[0002] The power amplifier is the main component of the communication system, and its function is to amplify the microwave signal. Power amplifiers are used in technical fields such as communication, radar, electronic countermeasures, and electronic measurement. Therefore, power amplifiers are an important research field in microwave communication systems. With the rapid development of electronic technology, people have higher and higher requirements on the volume and weight, frequency range, output power, stray, electromagnetic compatibility, operating temperature range, and heat dissipation capacity of power amplifiers. At present, most of the existing airborne high-power power amplifiers are large in size, small in operating temperature and frequency range, and poor in heat dissipation and electromagnetic compatibility. Since the current microwave communication requires a long transmission distance, the space electromagnetic environment and natural environment (such as temperature and humidity, salt spray, mold, etc.) are complex. Therefore, it is particularly important to develop an airborne power amplifier product with the advantages of high output power, small volume and weight, good heat dissipation, good electromagnetic compatibility, and the ability to adapt to various complex natural environments. Utility Model Content

[0003] In view of this, the utility model proposes a C-band high-power airborne power amplifier. The utility model has the advantages of high output power, small volume and weight, good heat dissipation, good electromagnetic compatibility, and the ability to adapt to various complex natural environments.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A C-band high-power airborne power amplifier, comprising a radio frequency amplification circuit, a power supply circuit, a detection circuit, a status reporting circuit, a negative voltage protection circuit and a working / silent circuit;

[0006] The RF input port of the RF amplifier circuit is connected to the external RF output port, the RF output port of the RF amplifier circuit is connected to the external antenna, and the detection signal output port of the RF amplifier circuit is connected to the detection signal input port of the detection circuit;

[0007] The power input port of the power circuit is connected to an external power supply, and the power output port of the power circuit is connected to the power input ports of the radio frequency amplification circuit, the status reporting circuit and the negative voltage protection circuit respectively;

[0008] The detection voltage output port of the detection circuit is connected to the detection voltage input port of the status reporting circuit;

[0009] The state reporting port of the state reporting circuit is connected to the state input port of the external interaction interface;

[0010] The power enable state output port of the negative voltage protection circuit is connected to the power enable state input port of the power supply circuit;

[0011] The working / silent control input port of the working / silent circuit is connected to the external control port, and the working / silent control output port of the working / silent circuit is connected to the working / silent control input port of the power supply circuit.

[0012] Further, the radio frequency amplification circuit includes a first isolator, a first monolithic amplifier, a second monolithic amplifier, a second isolator, a first internal matching power tube, a third isolator, a second internal matching power tube, a coupler and a fourth isolator connected in sequence;

[0013] The input port of the coupler is connected to the output port of the second internal matching power tube, the output port of the coupler is connected to the input port of the fourth isolation tube, and the coupling port of the coupler is the detection signal output port of the radio frequency amplification circuit.

[0014] Furthermore, the first monolithic amplifier is a gallium arsenide amplifier, and the second monolithic amplifier, the first internal matching power tube and the second internal matching power tube are gallium nitride internal matching power tubes.

[0015] Furthermore, the detection circuit includes a detection diode, a capacitor and a first resistor; the anode of the detection diode is the detection signal input port of the detection circuit, the cathode of the detection diode is the detection voltage output port of the detection circuit, the cathode of the detection diode is also connected to the first end of the capacitor and the first end of the first resistor respectively, and the second end of the capacitor and the second end of the first resistor are both grounded.

[0016] Furthermore, the state reporting circuit includes a voltage comparator, a second resistor and a third resistor; the first voltage input port of the voltage comparator is connected to the first end of the second resistor, the second end of the second resistor is respectively connected to the first end of the third resistor and the power input port of the state reporting circuit, the second end of the third resistor is grounded, the second voltage input port of the voltage comparator is the detection voltage input port of the state reporting circuit, the output port of the voltage comparator is the state reporting port of the state reporting circuit, the power input port of the voltage comparator is the power input port of the state reporting circuit, and the ground port of the voltage comparator is grounded.

[0017] Further, the negative voltage protection circuit includes an NPN transistor, a voltage stabilizing diode and fourth to sixth resistors; the collector of the NPN transistor is a power enable state output port of the negative voltage protection circuit, the collector of the NPN transistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the first power input port of the negative voltage protection circuit, the second end of the fourth resistor is also connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the base of the NPN transistor, the second end of the fifth resistor is also connected to the negative electrode of the voltage stabilizing diode, the positive electrode of the voltage stabilizing diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the second power input port of the negative voltage protection circuit, and the emitter of the NPN transistor is grounded;

[0018] Among them, the first power input port of the negative voltage protection circuit is a positive voltage power input port, and the second power input port of the negative voltage protection circuit is a negative voltage power input port.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the utility model compared with the prior art are:

[0020] 1. In the utility model, the power supply circuit and the radio frequency amplification circuit are separated into independent blocks, which reduces the crosstalk between electromagnetic and microwave.

[0021] 2. The utility model has the advantages of high output frequency, high output power and large working bandwidth, and has an output open circuit protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the structure of a C-band high-power airborne power amplifier in an embodiment of the utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the RF amplifier circuit.

[0024] Figure 3 for Figure 1 Schematic diagram of the detection circuit in .

[0025] Figure 4 for Figure 1 Schematic diagram of the state reporting circuit in .

[0026] Figure 5 for Figure 1 Schematic diagram of the structure of the negative pressure protection circuit. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] A C-band high-power airborne amplifier, such as Figure 1As shown, it includes a radio frequency amplification circuit, a power supply circuit, a detection circuit, a status reporting circuit, a negative voltage protection circuit and a working / silent circuit;

[0029] The RF input port of the RF amplifier circuit is connected to the external RF output port, the RF output port of the RF amplifier circuit is connected to the external antenna, and the detection signal output port of the RF amplifier circuit is connected to the detection signal input port of the detection circuit;

[0030] The power input port of the power circuit is connected to an external power supply, and the power output port of the power circuit is connected to the power input ports of the radio frequency amplification circuit, the status reporting circuit and the negative voltage protection circuit respectively;

[0031] The detection voltage output port of the detection circuit is connected to the detection voltage input port of the status reporting circuit;

[0032] The state reporting port of the state reporting circuit is connected to the state input port of the external interaction interface;

[0033] The power enable state output port of the negative voltage protection circuit is connected to the power enable state input port of the power supply circuit;

[0034] The working / silent control input port of the working / silent circuit is connected to the external control port, and the working / silent control output port of the working / silent circuit is connected to the working / silent control input port of the power supply circuit.

[0035] Furthermore, if Figure 2 As shown, the radio frequency amplification circuit includes a first isolator, a first monolithic amplifier, a second monolithic amplifier, a second isolator, a first internal matching power tube, a third isolator, a second internal matching power tube, a coupler and a fourth isolator connected in sequence;

[0036] The input port of the coupler is connected to the output port of the second internal matching power tube, the output port of the coupler is connected to the input port of the fourth isolation tube, and the coupling port of the coupler is the detection signal output port of the radio frequency amplification circuit.

[0037] Furthermore, the first monolithic amplifier is a gallium arsenide amplifier, and the second monolithic amplifier, the first internal matching power tube and the second internal matching power tube are gallium nitride internal matching power tubes.

[0038] Furthermore, if Figure 3As shown, the detection circuit includes a detection diode VD1, a capacitor C1 and a first resistor R1; the anode of the detection diode VD1 is a detection signal input port of the detection circuit, the cathode of the detection diode VD1 is a detection voltage output port of the detection circuit, the cathode of the detection diode VD1 is also connected to the first end of the capacitor C1 and the first end of the first resistor R1 respectively, and the second end of the capacitor C1 and the second end of the first resistor R1 are both grounded.

[0039] Furthermore, if Figure 4 As shown, the state reporting circuit includes a voltage comparator, a second resistor R2 and a third resistor R3; the first voltage input port of the voltage comparator is connected to the first end of the second resistor R2, the second end of the second resistor R2 is respectively connected to the first end of the third resistor R3 and the power input port of the state reporting circuit, the second end of the third resistor R3 is grounded, the second voltage input port of the voltage comparator is the detection voltage input port of the state reporting circuit, the output port of the voltage comparator is the state reporting port of the state reporting circuit, the power input port of the voltage comparator is the power input port of the state reporting circuit, and the ground port of the voltage comparator is grounded.

[0040] Furthermore, if Figure 5 As shown, the negative voltage protection circuit includes an NPN transistor Q1, a voltage stabilizing diode VD2 and fourth to sixth resistors; the collector of the NPN transistor Q1 is a power enable state output port of the negative voltage protection circuit, the collector of the NPN transistor Q1 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the first power input port of the negative voltage protection circuit, the second end of the fourth resistor R4 is also connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the base of the NPN transistor Q1, the second end of the fifth resistor R5 is also connected to the negative electrode of the voltage stabilizing diode VD2, the positive electrode of the voltage stabilizing diode VD2 is connected to the first end of the sixth resistor R6, the second end of the sixth resistor R6 is connected to the second power input port of the negative voltage protection circuit, and the emitter of the NPN transistor Q1 is grounded;

[0041] Among them, the first power input port of the negative voltage protection circuit is a positive voltage power input port, and the second power input port of the negative voltage protection circuit is a negative voltage power input port.

[0042] Specifically, in this embodiment, the first to third isolators adopt CTP-5275B-15 isolators produced by Nanjing SEG Company, and the fourth isolator adopts CTP-4080BWA-30dB isolator produced by Nanjing SEG Company; the first monolithic amplifier adopts BW553SW4 gallium arsenide amplifier produced by the 13th Institute of China Electronics Technology Group Corporation, the second monolithic amplifier adopts HEG040L gallium nitride internal matching power tube produced by the 13th Institute of China Electronics Technology Group Corporation, the first internal matching power tube adopts HEG007C gallium nitride internal matching power tube produced by the 13th Institute of China Electronics Technology Group Corporation, the second internal matching power tube adopts HEG603B gallium nitride internal matching power tube produced by the 13th Institute of China Electronics Technology Group Corporation, and the voltage comparator adopts LM2903;

[0043] The principle of the utility model is:

[0044] In the RF amplifier circuit, the operating frequency band of the first monolithic amplifier is 2-6GHz, the P-1 output power is 15dBm, and the typical power gain is 23dB; the operating frequency band of the second monolithic amplifier is 5.0-6.5GHz, the saturated output power is 36dBm, and the typical power gain is 18dB; the operating frequency band of the first internal matching power tube is 5.2-5.9GHz, the saturated output power is 42.5dBm, and the typical power gain is 10dB; the operating frequency band of the second internal matching power tube is 5.2-5.9GHz. The typical output power is 50.3dBm, and the typical power gain is 10.3dB; at the same time, in order to ensure better input standing waves and output standing waves, the first to fourth isolators are added, and the insertion loss of the isolator is about 0.3dB. By calculating the total gain of the RF amplifier circuit, it is 10.3+10+18+23-0.3×4=60.1dB. When the input signal is not less than -5dBm, the maximum output power of the power amplifier can reach 50dBm, and there is still a certain margin for gain. Considering the influence of high and low temperatures, the full-temperature output power of the power amplifier is at least 49dBm (80W).

[0045] The power supply circuit selected in this embodiment provides +28v, +5v and -5v power supply to the RF amplifier circuit, the status feedback circuit and the negative voltage protection circuit, and can meet the surge suppression requirements and suppress noise output;

[0046] The detection circuit uses a detection diode to convert the detection signal output by the RF amplifier circuit into a detection voltage for use by the status reporting circuit;

[0047] The status reporting circuit uses a voltage comparator to compare the detection voltage obtained by the detection circuit with the set reference voltage, and outputs different voltage values ​​at different output powers. When the detection voltage is greater than the set reference voltage, it outputs a high level, which means the product is in normal condition. When the detection voltage is less than the set reference voltage, it outputs a low level, which means the product is faulty.

[0048] The function of the negative voltage protection circuit is to ensure that the power circuit is in a shut-off state when there is no negative voltage in the power circuit, thereby protecting the safety of the RF amplifier circuit; specifically, when the power circuit outputs negative voltage, the negative voltage protection circuit outputs a high-level power enable state signal and enables the power circuit to work normally; when the power circuit does not output negative voltage, the negative voltage protection circuit outputs a low-level power enable state signal and stops the power circuit from working;

[0049] The working / silent circuit receives an external control signal to control the working / silent state of the power supply circuit.

[0050] In short, the utility model has the advantages of high output power, small volume and weight, good heat dissipation, good electromagnetic compatibility, and the ability to adapt to various complex natural environments.

[0051] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to the embodiments described. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A C-band high-power airborne power amplifier, characterized in that: Including radio frequency amplification circuit, power supply circuit, detection circuit, status reporting circuit, negative voltage protection circuit and working / silent circuit; The RF input port of the RF amplifier circuit is connected to the external RF output port, the RF output port of the RF amplifier circuit is connected to the external antenna, and the detection signal output port of the RF amplifier circuit is connected to the detection signal input port of the detection circuit; The power input port of the power circuit is connected to an external power supply, and the power output port of the power circuit is connected to the power input ports of the radio frequency amplification circuit, the status reporting circuit and the negative voltage protection circuit respectively; The detection voltage output port of the detection circuit is connected to the detection voltage input port of the status reporting circuit; The state reporting port of the state reporting circuit is connected to the state input port of the external interaction interface; The power enable state output port of the negative voltage protection circuit is connected to the power enable state input port of the power supply circuit; The working / silent control input port of the working / silent circuit is connected to the external control port, and the working / silent control output port of the working / silent circuit is connected to the working / silent control input port of the power supply circuit.

2. A C-band high-power airborne power amplifier according to claim 1, characterized in that: The radio frequency amplification circuit comprises a first isolator, a first monolithic amplifier, a second monolithic amplifier, a second isolator, a first internal matching power tube, a third isolator, a second internal matching power tube, a coupler and a fourth isolator which are connected in sequence; The input port of the coupler is connected to the output port of the second internal matching power tube, the output port of the coupler is connected to the input port of the fourth isolation tube, and the coupling port of the coupler is the detection signal output port of the radio frequency amplification circuit.

3. The C-band high-power airborne amplifier according to claim 2, characterized in that: The first monolithic amplifier is a gallium arsenide amplifier, and the second monolithic amplifier, the first internal matching power tube and the second internal matching power tube are gallium nitride internal matching power tubes.

4. The C-band high-power airborne amplifier according to claim 1, characterized in that: The detection circuit includes a detection diode, a capacitor and a first resistor; the positive pole of the detection diode is the detection signal input port of the detection circuit, the negative pole of the detection diode is the detection voltage output port of the detection circuit, the negative pole of the detection diode is also connected to the first end of the capacitor and the first end of the first resistor respectively, and the second end of the capacitor and the second end of the first resistor are both grounded.

5. The C-band high-power airborne power amplifier according to claim 1, characterized in that: The state reporting circuit includes a voltage comparator, a second resistor and a third resistor; the first voltage input port of the voltage comparator is connected to the first end of the second resistor, the second end of the second resistor is respectively connected to the first end of the third resistor and the power input port of the state reporting circuit, the second end of the third resistor is grounded, the second voltage input port of the voltage comparator is the detection voltage input port of the state reporting circuit, the output port of the voltage comparator is the state reporting port of the state reporting circuit, the power input port of the voltage comparator is the power input port of the state reporting circuit, and the ground port of the voltage comparator is grounded.

6. The C-band high-power airborne power amplifier according to claim 1, characterized in that: The negative voltage protection circuit includes an NPN transistor, a voltage stabilizing diode and fourth to sixth resistors; the collector of the NPN transistor is a power enable state output port of the negative voltage protection circuit, the collector of the NPN transistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the first power input port of the negative voltage protection circuit, the second end of the fourth resistor is also connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the base of the NPN transistor, the second end of the fifth resistor is also connected to the negative electrode of the voltage stabilizing diode, the positive electrode of the voltage stabilizing diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the second power input port of the negative voltage protection circuit, and the emitter of the NPN transistor is grounded; Among them, the first power input port of the negative voltage protection circuit is a positive voltage power input port, and the second power input port of the negative voltage protection circuit is a negative voltage power input port.

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