Setting method for amplifying cluster communication power and power amplifier

A technology for power amplifiers and power amplification, applied in power amplifiers, improving amplifiers to reduce nonlinear distortion, etc., can solve problems such as poor control intelligence, poor communication stability, and limited communication range, and achieve improved linearity and high stability , Gain adjustment convenient effect

Inactive Publication Date: 2012-04-18
PANDA ELECTRONICS GROUP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is: to propose a setting method and power amplifier for trunking communication power amplification; in order to improve the performance index of trunking communication power amplifier, improve trunking communication performance, improve the linearity of power amplifie

Method used

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  • Setting method for amplifying cluster communication power and power amplifier
  • Setting method for amplifying cluster communication power and power amplifier
  • Setting method for amplifying cluster communication power and power amplifier

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Embodiment Construction

[0018] The invention mainly consists of several parts including power amplification, power detection, temperature compensation power supply, automatic gain control and harmonic filter. System structure frame of power amplifier figure 1 Shown:

[0019] The power amplification part adopts the power back-off technology to carry out the high linearization design of the power amplifier, and improves the high linearity and third-order intermodulation coefficient of the power amplifier by sacrificing part of the working efficiency. The power amplification part is mainly divided into two parts: pre-amplification and final-stage amplification. The cascaded working mode with optimized inter-stage matching makes the circuit have the advantages of convenient debugging and simple structure.

[0020] The design uses transistor MRF859 with high reliability and gain and LDMOS power amplifier tube MRF9060 as the front-stage power amplifier and final-stage power amplifier module; HMC273MSIOG f...

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Abstract

The invention discloses a cluster communication power amplifier. The cluster communication power amplifier comprises an input impedance matching circuit, a controllable attenuation network circuit, a power amplifier, a directional coupling and output power detection circuit, an isolator, a harmonic filter and an output micro-strip impedance matching circuit, which are sequentially connected. The cluster communication power amplifier also comprises a digital signal processor (DSP) circuit. The power amplifier comprises a pre-amplifier and a final amplifier, which are in front-back connection; input and output impedance matching circuits are connected in series and in parallel to form micro-strip mixed matching circuits of a trapezoid connection capacitor; the output power detection circuit is connected to the DSP circuit; the output of the DSP circuit is connected with a control end of the controllable attenuation network circuit; and the input and output impedance matching circuits are micro-strip mixed matching circuits. The cluster communication power amplifier performs control and management in an intelligent automatic gain control (AGC) mode, is applicable to temperature compensation, temperature detection, power and voltage standing wave ratio (VSWR) detection and the like, and has the characteristics of low gain flatness, convenience for gain control, high stability and the like based on a mature power backing-off linear technology.

Description

technical field [0001] The invention belongs to radio communication, in particular to a power amplification method and device for high-power cluster communication. Background technique [0002] Long before the scale development of public mobile communication, wireless communication has been used in various professional fields. With the rapid development of public mobile communication, the application of professional mobile communication is relatively lagging behind and often neglected. The current private wireless communication system includes conventional analog trunking, digital trunking, intercom and other technologies. Generally speaking, it has the characteristics of relatively backward technology, single business, and narrow application range. However, with the increase of demand for command and dispatch and emergency communication, the importance of trunking communication system in civil and military applications is becoming more and more significant, and the existing...

Claims

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Application Information

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IPC IPC(8): H03F3/20H03F1/32
Inventor 庄东曙李跃进
Owner PANDA ELECTRONICS GROUP
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