意大利阿托斯ATOS放大器的原理和作用，詳細介紹如下: 原理：高(gao)(gao)頻功(gong)(gong)率放(fang)大器用(yong)于發(fa)(fa)射(she)(she)機的(de)(de)末級，作用(yong)是(shi)將高(gao)(gao)頻已調波信號(hao)進行(xing)功(gong)(gong)率放(fang)大，以(yi)滿足(zu)發(fa)(fa)送(song)功(gong)(gong)率的(de)(de)要求，然后經過天(tian)線將其輻(fu)射(she)(she)到(dao)(dao)空間，保(bao)證在一定區域內的(de)(de)接(jie)收(shou)機可以(yi)接(jie)收(shou)到(dao)(dao)滿意的(de)(de)信號(hao)電平，并且(qie)不干擾相鄰信道的(de)(de)通信。 高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)是(shi)(shi)通(tong)(tong)(tong)信系統(tong)中(zhong)發送裝置的(de)重要組件。按其(qi)工(gong)作頻(pin)(pin)帶(dai)(dai)的(de)寬(kuan)窄劃(hua)分為(wei)窄帶(dai)(dai)高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)和(he)寬(kuan)帶(dai)(dai)高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)兩種(zhong)，窄帶(dai)(dai)高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)通(tong)(tong)(tong)常以(yi)具有選頻(pin)(pin)濾波(bo)(bo)作用的(de)選頻(pin)(pin)電(dian)(dian)(dian)路(lu)(lu)作為(wei)輸(shu)(shu)出(chu)(chu)回路(lu)(lu)，故又稱(cheng)為(wei)調諧(xie)(xie)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)或諧(xie)(xie)振(zhen)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)；寬(kuan)帶(dai)(dai)高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)的(de)輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)路(lu)(lu)則是(shi)(shi)傳輸(shu)(shu)線變(bian)壓器(qi)(qi)(qi)(qi)或其(qi)他寬(kuan)帶(dai)(dai)匹配(pei)電(dian)(dian)(dian)路(lu)(lu)，因此又稱(cheng)為(wei)非調諧(xie)(xie)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)。高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)是(shi)(shi)一種(zhong)能(neng)(neng)量轉換(huan)器(qi)(qi)(qi)(qi)件，它將(jiang)電(dian)(dian)(dian)源(yuan)供給的(de)直流(liu)(liu)(liu)能(neng)(neng)量轉換(huan)成(cheng)為(wei)高(gao)頻(pin)(pin)交流(liu)(liu)(liu)輸(shu)(shu)出(chu)(chu)在(zai) “低(di)(di)頻(pin)(pin)電(dian)(dian)(dian)子線路(lu)(lu)"課程中(zhong)已知，放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)可以(yi)按照電(dian)(dian)(dian)流(liu)(liu)(liu)導(dao)通(tong)(tong)(tong)角(jiao)的(de)不同，將(jiang)其(qi)分為(wei)甲、乙、丙(bing)(bing)三(san)(san)類(lei)工(gong)作狀(zhuang)(zhuang)態。甲類(lei)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)電(dian)(dian)(dian)流(liu)(liu)(liu)的(de)流(liu)(liu)(liu)通(tong)(tong)(tong)角(jiao)為(wei)360o，適用于(yu)(yu)(yu)小信號(hao)低(di)(di)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)。乙類(lei)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)電(dian)(dian)(dian)流(liu)(liu)(liu)的(de)流(liu)(liu)(liu)通(tong)(tong)(tong)角(jiao)約(yue)等于(yu)(yu)(yu) 180o；丙(bing)(bing)類(lei)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)電(dian)(dian)(dian)流(liu)(liu)(liu)的(de)流(liu)(liu)(liu)通(tong)(tong)(tong)角(jiao)則小于(yu)(yu)(yu)180o。乙類(lei)和(he)丙(bing)(bing)類(lei)都適用于(yu)(yu)(yu)大(da)(da)(da)(da)(da)功(gong)(gong)(gong)率(lv)(lv)工(gong)作丙(bing)(bing)類(lei)工(gong)作狀(zhuang)(zhuang)態的(de)輸(shu)(shu)出(chu)(chu)功(gong)(gong)(gong)率(lv)(lv)和(he)效率(lv)(lv)是(shi)(shi)三(san)(san)種(zhong)工(gong)作狀(zhuang)(zhuang)態中(zhong)最(zui)高(gao)者。高(gao)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)大(da)(da)(da)(da)(da)多工(gong)作于(yu)(yu)(yu)丙(bing)(bing)類(lei)。但丙(bing)(bing)類(lei)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)的(de)電(dian)(dian)(dian)流(liu)(liu)(liu)波(bo)(bo)形失真太大(da)(da)(da)(da)(da)，因而不能(neng)(neng)用于(yu)(yu)(yu)低(di)(di)頻(pin)(pin)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)，只能(neng)(neng)用于(yu)(yu)(yu)采用調諧(xie)(xie)回路(lu)(lu)作為(wei)負載的(de)諧(xie)(xie)振(zhen)功(gong)(gong)(gong)率(lv)(lv)放(fang)(fang)大(da)(da)(da)(da)(da)。由于(yu)(yu)(yu)調諧(xie)(xie)回路(lu)(lu)具有濾波(bo)(bo)能(neng)(neng)力，回路(lu)(lu)電(dian)(dian)(dian)流(liu)(liu)(liu)與(yu)電(dian)(dian)(dian)壓仍然(ran)極近于(yu)(yu)(yu)正(zheng)(zheng)弦波(bo)(bo)形，失真很(hen)小。鎖(suo)(suo)相(xiang)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)實際上是(shi)(shi)一個模擬的(de)傅(fu)立葉變(bian)換(huan)器(qi)(qi)(qi)(qi)，鎖(suo)(suo)相(xiang)放(fang)(fang)大(da)(da)(da)(da)(da)器(qi)(qi)(qi)(qi)的(de)輸(shu)(shu)出(chu)(chu)是(shi)(shi)一個直流(liu)(liu)(liu)電(dian)(dian)(dian)壓，正(zheng)(zheng)比(bi)于(yu)(yu)(yu)是(shi)(shi)輸(shu)(shu)入信號(hao)中(zhong)某一特定頻(pin)(pin)率(lv)(lv)（參數(shu)輸(shu)(shu)入頻(pin)(pin)率(lv)(lv)）的(de)信號(hao)幅(fu)值。而輸(shu)(shu)入信號(hao)中(zhong)的(de)其(qi)他頻(pin)(pin)率(lv)(lv)成(cheng)分將(jiang)不能(neng)(neng)對(dui)輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)壓構成(cheng)任(ren)何貢獻。 兩個正(zheng)弦信號(hao)，頻率都為1Hz，有90度相位差，用乘法器(qi)相乘得到的結(jie)果是一個有直流(liu)偏量(liang)的正(zheng)弦信號(hao)。 如果是一(yi)個1Hz和一(yi)個1.1Hz的信(xin)號相乘，用乘法器相乘得到的結果是輪(lun)廓為正弦的調制信(xin)號，直(zhi)流偏量(liang)為0。 意大利阿托斯ATOS放大器只(zhi)有(you)與參考信(xin)(xin)(xin)號(hao)頻(pin)率全一(yi)致的(de)信(xin)(xin)(xin)號(hao)才能(neng)在(zai)乘法器輸出端(duan)得到(dao)直(zhi)流偏量，其他信(xin)(xin)(xin)號(hao)在(zai)輸出端(duan)都是(shi)交(jiao)流信(xin)(xin)(xin)號(hao)。如果在(zai)乘法器的(de)輸出端(duan)加一(yi)低通濾波器，那么所有(you)的(de)交(jiao)流信(xin)(xin)(xin)號(hao)分量全部被濾掉，剩(sheng)下的(de)直(zhi)流分量就只(zhi)是(shi)正(zheng)比(bi)于輸入信(xin)(xin)(xin)號(hao)中的(de)特(te)定頻(pin)率的(de)信(xin)(xin)(xin)號(hao)分量的(de)幅值(zhi)。
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