某型接收機(jī)中放大器自激機(jī)理分析與預(yù)防措施
電子技術(shù)應(yīng)用
余小輝,麻澤龍
中國電子科技集團(tuán)公司第十三研究所
摘要: 對某型接收機(jī)中頻噪底升高故障進(jìn)行了分析處理,分析結(jié)果表明射頻模塊腔體內(nèi)存在個(gè)體差異,導(dǎo)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(jī)理的分析給出了相應(yīng)的預(yù)防措施,在射頻小盒側(cè)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(jià)值。
中圖分類號:TN72 文獻(xiàn)標(biāo)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(jī)中放大器自激機(jī)理分析與預(yù)防措施[J]. 電子技術(shù)應(yīng)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(jī)中放大器自激機(jī)理分析與預(yù)防措施[J]. 電子技術(shù)應(yīng)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(shù)領(lǐng)域發(fā)展迅速。微波毫米波收發(fā)組件是雷達(dá)通信、衛(wèi)星通信等系統(tǒng)中最為關(guān)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(gè)系統(tǒng)有著極為關(guān)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(fù)載及腔體等)變化的情況下保持正常工作的能力。當(dāng)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(shí),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(gè)通信系統(tǒng)的性能[3-5]。本文結(jié)合某型接收機(jī)中頻噪底升高的故障處理過程,包括故障確認(rèn)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(jìn)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(tuán)公司第十三研究所, 河北 石家莊 050000)
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