某型接收機中放大器自激機理分析與預防措施
電子技術應用
余小輝,,麻澤龍
中國電子科技集團公司第十三研究所
摘要: 對某型接收機中頻噪底升高故障進行了分析處理,,分析結果表明射頻模塊腔體內(nèi)存在個體差異,導致本振放大器在脈沖工作條件下產(chǎn)生自激,,通過對放大器自激機理的分析給出了相應的預防措施,,在射頻小盒側壁中粘貼吸波材料,可以有效消除自激,。論文對今后腔體自激問題的處理分析具有參考價值,。
中圖分類號:TN72 文獻標志碼:A DOI: 10.16157/j.issn.0258-7998.245673
中文引用格式: 余小輝,麻澤龍. 某型接收機中放大器自激機理分析與預防措施[J]. 電子技術應用,,2024,,50(11):54-58.
英文引用格式: Yu Xiaohui,Ma Zelong. Analysis of the mechanism and preventive measures of self-excited oscillation of amplifier in a receiver[J]. Application of Electronic Technique,,2024,,50(11):54-58.
中文引用格式: 余小輝,麻澤龍. 某型接收機中放大器自激機理分析與預防措施[J]. 電子技術應用,,2024,,50(11):54-58.
英文引用格式: Yu Xiaohui,Ma Zelong. Analysis of the mechanism and preventive measures of self-excited oscillation of amplifier in a receiver[J]. Application of Electronic Technique,,2024,,50(11):54-58.
Analysis of the mechanism and preventive measures of self-excited oscillation of amplifier in a receiver
Yu Xiaohui,Ma Zelong
The 13th Research Institute of China Electronics Technology Group Corporation
Abstract: The fault of higher level of IF-Noise was successfully handled for a receiver. The result shows that individual differences exist within the RF module cavity. It causes the self-excited oscillation of the local oscillator amplifier in pulsed mode. Preventive measures are given after analysis of the mechanism.Attach wave-absorbing materials to the sidewalls of the RF box can effectively eliminate self-excited oscillation.This article has value for the analysis and treatment of cavity self-excited oscillation in the future.
Key words : amplifier,; mechanism of self-excited oscillation,; wave-absorbing materials; preventive measures
引言
近年來,,國內(nèi)毫米波技術領域發(fā)展迅速,。微波毫米波收發(fā)組件是雷達通信,、衛(wèi)星通信等系統(tǒng)中最為關鍵的組成部分,而放大器一般處于系統(tǒng)中的核心位置,,其性能和穩(wěn)定性對整個系統(tǒng)有著極為關鍵的影響[1-2],。放大器的穩(wěn)定性是指其在環(huán)境(溫度、信號頻率,、源,、負載及腔體等)變化的情況下保持正常工作的能力。當放大器處于不穩(wěn)定的工作狀態(tài)下,,即出現(xiàn)自激現(xiàn)象時,,其產(chǎn)生的信號會干擾主信號的接收和發(fā)射,從而影響整個通信系統(tǒng)的性能[3-5],。本文結合某型接收機中頻噪底升高的故障處理過程,,包括故障確認過程、故障定位過程,、故障處理方法以及最后的舉一反三,,對放大器的自激原理進行了深入的分析,并給出了有效避免放大器自激的措施,。
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作者信息:
余小輝,,麻澤龍
(中國電子科技集團公司第十三研究所, 河北 石家莊 050000)
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