C-band 500W power amplifier assembly

Abstract

The utility model relates to the technical field of wireless communication, in particular to a C-band 500W power amplifier assembly, which comprises a circuit board and a shell, the circuit board is provided with a preceding-stage drive circuit, a final-stage power amplifier synthesis circuit, a functional detection circuit, a power conversion circuit, a directional coupler, a filter and a circulator, signals are amplified stage by stage through four-stage drive amplification, and the signals are output to the shell. The first attenuator and the design matching circuit are used for improving interstage matching between amplifiers, the balance type power synthesis design thought is adopted in the last stage, four-way power amplifier synthesis is achieved through the 3dB bridge, the target power value is obtained, meanwhile, the stability of the power amplifier is achieved, and the power amplifier is high in reliability. The module has the functions of output power detection, temperature detection, standing wave detection and the like so as to ensure that the power amplifier module works normally and protect the power amplifier module, and the technical scheme realizes the design of the power amplifier module with high power, high gain, high stability and simple structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication technical field especially relates to a C wave band 500W power amplifier assembly. BACKGROUND

[0002] Power amplifier assembly is an important component of modern electronic system, has been widely used in communication, radar, electronic countermeasure, remote control telemetry and instrument and meter etc.

[0003] But the output power of the existing application in communication system heavy's high -power power amplifier assembly is not ideal, and the performance is not stable enough. UTILITY MODEL CONTENTS

[0004] The utility model discloses a C wave band 500W power amplifier assembly, solves the output power of the existing application in communication system heavy's high -power power amplifier assembly is not ideal, and the performance is not stable enough.

[0005] To realize above -mentioned purpose, the utility model provides a C wave band 500W power amplifier assembly, the C wave band 500W power amplifier assembly includes circuit board and shell, be provided with a plurality of fixed holes on the circuit board, the circuit board is installed in the inside of the shell through screw, be provided with pre -stage drive discharge circuit, last stage power amplifier synthesis circuit, functional detection circuit, power conversion circuit, directional coupler, filter and circulator on the circuit board, the one end of pre -stage drive discharge circuit input signal, the other end of pre -stage drive discharge circuit is connected with last stage power amplifier synthesis circuit, the one end of last stage power amplifier synthesis circuit away from pre -stage drive discharge circuit is connected directional coupler, filter and circulator in proper order to the antenna is exported, one end of functional detection circuit is connected with power conversion circuit, the other end of functional detection circuit is connected with pre -stage drive discharge circuit and last stage power amplifier synthesis circuit.

[0006] Among them, pre -stage drive discharge circuit includes first attenuator and four first power amplifiers, the one end of first attenuator input signal, the other end of first attenuator is connected four first power amplifiers in proper order.

[0007] Among them, last stage power amplifier synthesis circuit includes first bridge, two second bridges, two third bridges and fourth bridge, one end of first bridge is connected with the output end of pre -stage drive discharge circuit, the other end of first bridge is connected with two second bridges, the one end of each second bridge away from first bridge is connected with third bridge through second power amplifier, the one end of two third bridges away from corresponding second bridge is connected with fourth bridge, and the output end of fourth bridge is connected with directional coupler.

[0008] The forward coupling power of the directional coupler is detected by the functional detection circuit.

[0009] The reverse coupling power of the circulator is detected by the functional detection circuit.

[0010] A second attenuator is arranged between the functional detection circuit and the reverse coupling power detection circuit of the circulator.

[0011] The utility model discloses a C wave band 500W power amplifier assembly, including signal through four stage drive stage by stage amplification, finally through the last stage tube amplification to 500W output, utilize the first attenuator and design matching circuit improve the stage matching between amplifier, last stage adopts balanced power synthesis design thought, utilize 3dB bridge and realize four way power amplifier synthesis, realize the stability of power amplifier when obtaining target power value, module has output power detection, temperature detection, standing wave detection and other functions to ensure that power amplifier module normal work and protect it, and the technical scheme realizes high power, high gain, high stability and simple structure's power amplifier assembly design. ACCURACY

[0012] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description simple introduction, obviously, below description in the drawing only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0013] Figure 1 It is the circuit schematic of C wave band 500W power amplifier assembly provided by the utility model.

[0014] Figure 2 It is the structural schematic of C wave band 500W power amplifier assembly provided by the utility model.

[0015] 101-circuit board, 102-housing, 103-fixing hole, 104-early stage drive circuit, 105-last stage power amplifier synthesis circuit, 106-functional detection circuit, 107-power conversion circuit, 108-directional coupler, 109-filter, 110-circulator, 111-first attenuator, 112-first power amplifier, 113-first bridge, 114-second bridge, 115-third bridge, 116-fourth bridge, 117-second power amplifier, 118-second attenuator. CONCRETE IMPLEMENTATION

[0016] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0017] Please refer to Figure 1 and Figure 2 The utility model provides a C wave band 500W power amplifier assembly, C wave band 500W power amplifier assembly includes circuit board 101 and casing 102, a plurality of fixed holes 103 are arranged on the circuit board 101, the circuit board 101 is installed in the inside of casing 102 through screw, the circuit board 101 is provided with pre -stage drive discharge circuit 104, last stage power amplifier synthesis circuit 105, functional detection circuit 106, power conversion circuit 107, directional coupler 108, filter 109 and circulator 110, one end of pre -stage drive discharge circuit 104 input signal, the other end of pre -stage drive discharge circuit 104 is connected with last stage power amplifier synthesis circuit 105, last stage power amplifier synthesis circuit 105 is away from the one end of pre -stage drive discharge circuit 104 and is connected directional coupler 108, filter 109 and circulator 110 in proper order to the antenna, one end of functional detection circuit 106 is connected with power conversion circuit 107, the other end of functional detection circuit 106 is connected with pre -stage drive discharge circuit 104 and last stage power amplifier synthesis circuit 105.

[0018] In the embodiment, the signal is amplified by four-stage drive discharge, and finally amplified to 500W output by the last-stage tube. The first attenuator 111 and the design matching circuit are used to improve the inter-stage matching between amplifiers. The last-stage adopts a balanced power synthesis design idea, and four-way power amplifier synthesis is realized by using a 3dB bridge. The target power value is obtained, and the stability of the power amplifier is realized. The module has output power detection, temperature detection, standing wave detection and other functions to ensure the normal work of the power amplifier module and protect it. The technical scheme realizes the design of a power amplifier assembly with high power, high gain, high stability and simple structure.

[0019] Further, the pre-stage drive discharge circuit 104 includes a first attenuator 111 and four first power amplifiers 112. One end of the first attenuator 111 inputs a signal. The other end of the first attenuator 111 is connected in series with the four first power amplifiers 112 in sequence.

[0020] Further, the final stage power amplifier synthesis circuit 105 comprises a first bridge 113, two second bridges 114, two third bridges 115 and a fourth bridge 116, one end of the first bridge 113 is connected with the output end of the pre-stage driver circuit 104, the other end of the first bridge 113 is connected with two second bridges 114, each end of the second bridge 114 away from the first bridge 113 is connected with the third bridge 115 through a second power amplifier 117, each end of the third bridge 115 away from the corresponding second bridge 114 is connected with the fourth bridge 116, and the output end of the fourth bridge 116 is connected with the directional coupler 108.

[0021] Further, the forward coupling power of the directional coupler 108 is detected by the functional detection circuit 106.

[0022] Further, the reverse coupling power of the circulator 110 is detected by the functional detection circuit 106.

[0023] Further, the functional detection circuit 106 is provided with a second attenuator 118 between the reverse coupling power detection circuit of the circulator 110.

[0024] Further, the technical scheme adopts attenuators, isolators, bridge synthesis and well-designed matching circuits to improve the inter-stage matching of amplifier devices, and in addition to the cavity design of the RF circuit and the power control circuit, the stages of the RF link are also designed to be separated by cavities to improve signal crosstalk and improve the stability of the amplification link.

[0025] Further, in order to avoid the influence of in-band small signal flatness on the saturation depth of the final stage power device, the pre-stage driver selects a driver device with good gain flatness, and an equalizer is placed in the pre-stage to improve the in-band fluctuation of the small signal and improve the stability and reliability of the final stage device.

[0026] Further, the technical scheme detects the output power, outputs a fault signal when the output power is lower than the threshold value, and places a circulator 110 at the output port, places a high-power absorbing load at the isolation end of the circulator 110, and ensures that the power amplifier is not damaged by high-power full reflection in the case of open circuit or short circuit at the port, and the reflected signal is coupled to realize standing wave detection.

[0027] The above only discloses a preferred embodiment of the utility model, of course, cannot limit the scope of the utility model, and the person skilled in the art can understand that the above-mentioned embodiment can be implemented by the whole or part of the process, and the equivalent changes made according to the utility model claim still belong to the range covered by the utility model.

Claims

1. A C-band 500W power amplifier assembly, characterized in that, comprising a circuit board and a shell, a plurality of fixing holes are arranged on the circuit board, the circuit board is installed in the interior of the shell through screws, a front-stage drive amplifier circuit, a final-stage power amplifier synthesis circuit, a functional detection circuit, a power conversion circuit, a directional coupler, a filter and a circulator are arranged on the circuit board, one end of the front-stage drive amplifier circuit inputs a signal, the other end of the front-stage drive amplifier circuit is connected with the final-stage power amplifier synthesis circuit, one end of the final-stage power amplifier synthesis circuit away from the front-stage drive amplifier circuit is connected with the directional coupler, the filter and the circulator in sequence, and outputs to an antenna, one end of the functional detection circuit is connected with the power conversion circuit, and the other end of the functional detection circuit is connected with the front-stage drive amplifier circuit and the final-stage power amplifier synthesis circuit.

2. The C-band 500W power amplifier assembly of claim 1, characterized in that, the front-stage drive amplifier circuit comprises a first attenuator and four first power amplifiers, one end of the first attenuator inputs a signal, and the other end of the first attenuator is connected with the four first power amplifiers in sequence.

3. The C-band 500W power amplifier assembly of claim 2, characterized in that, the final-stage power amplifier synthesis circuit comprises a first bridge, two second bridges, two third bridges and a fourth bridge, one end of the first bridge is connected with an output end of the front-stage drive amplifier circuit, the other end of the first bridge is connected with two second bridges, one end of each of the second bridges away from the first bridge is connected with a third bridge through a second power amplifier, one end of each of the third bridges away from the corresponding second bridge is connected with the fourth bridge, and an output end of the fourth bridge is connected with the directional coupler.

4. The C-band 500W power amplifier assembly of claim 3, characterized in that, forward coupling power of the directional coupler is detected through the functional detection circuit.

5. The C-band 500W power amplifier assembly of claim 4, characterized in that, reverse coupling power of the circulator is detected through the functional detection circuit.

6. The C-band 500W power amplifier assembly of claim 5, characterized in that, a second attenuator is arranged between the functional detection circuit and a reverse coupling power detection circuit of the circulator.

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