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Microwave broadband power amplifier

A power amplifier and microwave technology, applied in the direction of power amplifiers, etc., can solve the problems of large size and achieve the effects of easy manufacture and installation, high power capacity, and reduced volume

Active Publication Date: 2017-06-30
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the circuit miniaturization of the power amplifier, a balun structure with a helical structure is adopted. The traditional method is a U-shaped balun with a relatively large size.

Method used

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Examples

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Embodiment Construction

[0023] Such as Figure 1-3 As shown, a microwave broadband power amplifier includes a pre-amplification unit PA1, an attenuator S1, a final amplifying unit PA2, an input matching of the final amplifying unit, and an output matching of the final amplifying unit. The pre-amplifying unit PA1, The attenuator S1, the input matching of the final amplifying unit, the final amplifying unit PA2, and the output matching of the final amplifying unit are connected in sequence. The operating frequency of the microwave broadband power amplifier is in the P-band, and the amplifier enables the working bandwidth of the whole circuit in the P-band to reach multiple octaves.

[0024] The output matching of the final amplifying unit adopts a helical balun structure and is wound with a semi-rigid cable. Optimized, the material is SMT680-086 / 25, and the length is 110mm. The semi-rigid cable at the output end has a large power tolerance, and the average output power of the power amplifier can reac...

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Abstract

The invention provides a microwave broadband power amplifier. The microwave broadband power amplifier comprises a final-stage amplification unit PA2, a final-stage amplification unit input match and a final-stage amplification unit output match, wherein the final-stage amplification unit input match, the final-stage amplification unit PA2, and the final-stage amplification unit output match are connected in sequence; the final-stage amplification unit output match adopts a spiral line Balun structure. The amplifier has the advantages that a working bandwidth is relatively wide and output power is relatively great; the size of a PCB (Printed Circuit Board) of the power amplifier is relatively small and heat dissipation is easy to realize.

Description

technical field [0001] The invention relates to the technical field of microwave power amplifiers in radar, communication and electronic countermeasure systems, in particular to a microwave broadband power amplifier. Background technique [0002] A power amplifier is a device that amplifies weak radio frequency small signals of a certain operating frequency and bandwidth. The power amplifier mainly includes the front-stage amplifier unit PA1, the final-stage amplifier unit PA2 and other parts. The principle is that the incoming weak RF small signal is amplified to a certain power by the pre-stage amplifier unit PA1, and then sent to the final stage after passing through the inter-stage attenuator. stage amplifier for power amplification. [0003] In the design of the power amplifier, it is necessary to match the impedance of the power tube to 50 ohms. Generally, there are microstrip lines and coaxial lines. The length is relatively long, which increases the circuit size. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 安士全刘志红张瑞王田王新海郑世连徐晋王匀
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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