高頻穿心電容要想要濾除的噪聲頻率要如何進行呢？一起和小編來看看吧。
盡(jin)管從濾(lv)除高頻噪(zao)聲(sheng)的(de)角度看，電(dian)容(rong)(rong)的(de)諧振(zhen)是不(bu)希望的(de)，但是電(dian)容(rong)(rong)的(de)諧振(zhen)并不(bu)是總是的(de)。當要濾(lv)除的(de)噪(zao)聲(sheng)頻率確(que)定時，可以通過(guo)調整(zheng)電(dian)容(rong)(rong)的(de)容(rong)(rong)量，使諧振(zhen)點剛好落在騷擾頻率上。
在實(shi)際工(gong)程(cheng)中，要濾(lv)除(chu)的(de)電(dian)(dian)磁噪(zao)聲(sheng)頻率往往高(gao)(gao)達數百MHz，甚至超(chao)過1GHz。對(dui)這樣高(gao)(gao)頻的(de)電(dian)(dian)磁噪(zao)聲(sheng)必須使用(yong)(yong)高(gao)(gao)頻穿心電(dian)(dian)容(rong)才(cai)能(neng)有(you)效(xiao)地濾(lv)除(chu)。普通電(dian)(dian)容(rong)之(zhi)(zhi)所以不能(neng)有(you)效(xiao)地濾(lv)除(chu)高(gao)(gao)頻噪(zao)聲(sheng)，是(shi)因為兩個(ge)原(yuan)因，一(yi)個(ge)原(yuan)因是(shi)電(dian)(dian)容(rong)引線(xian)電(dian)(dian)感造成電(dian)(dian)容(rong)諧振，對(dui)高(gao)(gao)頻信(xin)號(hao)呈現(xian)較大(da)的(de)阻抗，削弱了(le)對(dui)高(gao)(gao)頻信(xin)號(hao)的(de)旁路(lu)作(zuo)用(yong)(yong)；另一(yi)個(ge)原(yuan)因是(shi)導線(xian)之(zhi)(zhi)間的(de)寄生電(dian)(dian)容(rong)使高(gao)(gao)頻信(xin)號(hao)發生耦合，降低了(le)濾(lv)波效(xiao)果。
高(gao)頻穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)之所以能有(you)效地濾除高(gao)頻噪(zao)聲，是因為高(gao)頻穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)不僅沒(mei)有(you)引線電感造成電容(rong)(rong)(rong)(rong)諧(xie)振頻率過低的問題，而且穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)可以直接安裝在(zai)金(jin)屬(shu)面(mian)板(ban)上(shang)，利用金(jin)屬(shu)面(mian)板(ban)起到高(gao)頻隔離的作用。但(dan)是在(zai)使用穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)時，要注意的問題是安裝問題。穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)***的弱(ruo)點(dian)是怕高(gao)溫(wen)和溫(wen)度沖擊，這在(zai)將(jiang)(jiang)穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)往(wang)金(jin)屬(shu)面(mian)板(ban)上(shang)焊接時造成很大困難(nan)。許多(duo)電容(rong)(rong)(rong)(rong)在(zai)焊接過程(cheng)中發生(sheng)損(sun)壞(huai)。特別是當需要將(jiang)(jiang)大量的穿(chuan)心(xin)(xin)(xin)(xin)(xin)電容(rong)(rong)(rong)(rong)安裝在(zai)面(mian)板(ban)上(shang)時，只要有(you)一個損(sun)壞(huai)，就很難(nan)修復(fu)，因為在(zai)將(jiang)(jiang)損(sun)壞(huai)的電容(rong)(rong)(rong)(rong)拆(chai)下時，會造成鄰近其它電容(rong)(rong)(rong)(rong)的損(sun)壞(huai)。
隨著電(dian)(dian)(dian)(dian)子(zi)設(she)備復雜程(cheng)度的(de)提高，設(she)備內部強弱(ruo)電(dian)(dian)(dian)(dian)混(hun)合(he)安(an)裝(zhuang)、數字邏輯電(dian)(dian)(dian)(dian)路(lu)混(hun)合(he)安(an)裝(zhuang)的(de)情(qing)況越來越多，電(dian)(dian)(dian)(dian)路(lu)模塊之(zhi)(zhi)間(jian)的(de)相互騷擾(rao)成為嚴重的(de)問題。解決這(zhe)(zhe)種電(dian)(dian)(dian)(dian)路(lu)模塊相互騷擾(rao)的(de)方法之(zhi)(zhi)一是(shi)用金屬隔(ge)離艙將不同性質的(de)電(dian)(dian)(dian)(dian)路(lu)隔(ge)離開(kai)。但(dan)是(shi)所有穿過隔(ge)離艙的(de)導線(xian)(xian)要(yao)通過穿心(xin)電(dian)(dian)(dian)(dian)容，否則會(hui)造(zao)成隔(ge)離失效。當不同電(dian)(dian)(dian)(dian)路(lu)模塊之(zhi)(zhi)間(jian)有大量(liang)的(de)聯線(xian)(xian)時，在(zai)隔(ge)離艙上安(an)裝(zhuang)大量(liang)的(de)穿心(xin)電(dian)(dian)(dian)(dian)容是(shi)十分困難(nan)的(de)事(shi)情(qing)。為了解決這(zhe)(zhe)個問題，國(guo)外許多廠(chang)商(shang)開(kai)發了“濾波(bo)陣(zhen)列板(ban)”，這(zhe)(zhe)是(shi)用特殊工(gong)藝事(shi)先將穿心(xin)電(dian)(dian)(dian)(dian)容焊接(jie)在(zai)一塊金屬板(ban)構成的(de)器件，使用濾波(bo)陣(zhen)列板(ban)能夠輕(qing)而易(yi)舉地解決大量(liang)導線(xian)(xian)穿過金屬面板(ban)的(de)問題。
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