發布時(shi)間：
2017
-
05
-
18
性能特點：（1）工作穩定(ding)，覆(fu)(fu)(fu)蓋效果好:光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)通(tong)過(guo)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸(shu)(shu)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，不(bu)(bu)受地(di)(di)理環境(jing)、天(tian)氣變(bian)化(hua)(hua)或(huo)(huo)基(ji)(ji)站(zhan)(zhan)覆(fu)(fu)(fu)蓋范圍調整的(de)(de)(de)(de)(de)影響，因此工作穩定(ding)，覆(fu)(fu)(fu)蓋效果好。（2）設(she)計和施工更(geng)為(wei)靈活:光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)在設(she)計時無需考慮(lv)安裝地(di)(di)點能否接(jie)收(shou)到(dao)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)；不(bu)(bu)需考慮(lv)收(shou)發(fa)隔離問題，選址(zhi)方便；覆(fu)(fu)(fu)蓋天(tian)線(xian)可(ke)根據需要采用全向(xiang)或(huo)(huo)定(ding)向(xiang)天(tian)線(xian)。另(ling)外射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)能夠在很小(xiao)的(de)(de)(de)(de)(de)傳(chuan)送(song)損失(shi)的(de)(de)(de)(de)(de)情況下(xia)被傳(chuan)送(song)到(dao)遠(yuan)達(da)20公(gong)里的(de)(de)(de)(de)(de)遠(yuan)處，光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)很細，容易敷(fu)設(she)。因此，設(she)計和施工的(de)(de)(de)(de)(de)靈活性大(da)(da)。（３）避免(mian)同頻干(gan)(gan)擾，可(ke)全向(xiang)覆(fu)(fu)(fu)蓋，干(gan)(gan)擾少(shao):光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)是為(wei)了擴大(da)(da)或(huo)(huo)延續基(ji)(ji)站(zhan)(zhan)的(de)(de)(de)(de)(de)覆(fu)(fu)(fu)蓋范圍，把下(xia)行(xing)(xing)(xing)射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)變(bian)成(cheng)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)后，從基(ji)(ji)站(zhan)(zhan)到(dao)遠(yuan)程區域，可(ke)使(shi)干(gan)(gan)擾及插入損失(shi)減小(xiao)到(dao)最小(xiao)。（４）可(ke)提高增益(yi)而(er)不(bu)(bu)會自激(ji)，有利于(yu)加(jia)大(da)(da)下(xia)行(xing)(xing)(xing)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)發(fa)射(she)(she)功(gong)(gong)率(lv)(lv)；光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)是由(you)(you)近(jin)(jin)(jin)(jin)端機(ji)(ji)和遠(yuan)構(gou)成(cheng)的(de)(de)(de)(de)(de)。近(jin)(jin)(jin)(jin)端機(ji)(ji)通(tong)過(guo)耦合(he)器(qi)(qi)(qi)耦合(he)基(ji)(ji)站(zhan)(zhan)下(xia)行(xing)(xing)(xing)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，并(bing)(bing)入近(jin)(jin)(jin)(jin)端機(ji)(ji)射(she)(she)頻光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模(mo)塊(kuai)(kuai)將基(ji)(ji)站(zhan)(zhan)的(de)(de)(de)(de)(de)下(xia)行(xing)(xing)(xing)射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)通(tong)過(guo)電光(guang)(guang)(guang)(guang)(guang)轉(zhuan)換部件(jian)轉(zhuan)換成(cheng)光(guang)(guang)(guang)(guang)(guang)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)并(bing)(bing)經(jing)(jing)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸(shu)(shu)至遠(yuan)端機(ji)(ji)，在遠(yuan)端機(ji)(ji)的(de)(de)(de)(de)(de)射(she)(she)頻光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模(mo)塊(kuai)(kuai)將接(jie)收(shou)到(dao)的(de)(de)(de)(de)(de)下(xia)行(xing)(xing)(xing)的(de)(de)(de)(de)(de)光(guang)(guang)(guang)(guang)(guang)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)轉(zhuan)化(hua)(hua)成(cheng)相(xiang)(xiang)應的(de)(de)(de)(de)(de)射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，該射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)經(jing)(jing)功(gong)(gong)率(lv)(lv)放(fang)大(da)(da)器(qi)(qi)(qi)放(fang)大(da)(da)變(bian)為(wei)所(suo)需要的(de)(de)(de)(de)(de)功(gong)(gong)率(lv)(lv)電平(ping)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，并(bing)(bing)通(tong)過(guo)雙工器(qi)(qi)(qi)由(you)(you)重(zhong)發(fa)天(tian)線(xian)發(fa)射(she)(she)出去，進行(xing)(xing)(xing)區域覆(fu)(fu)(fu)蓋；反之由(you)(you)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)的(de)(de)(de)(de)(de)重(zhong)發(fa)天(tian)線(xian)接(jie)收(shou)到(dao)的(de)(de)(de)(de)(de)上行(xing)(xing)(xing)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)經(jing)(jing)過(guo)低噪聲放(fang)大(da)(da)器(qi)(qi)(qi)放(fang)大(da)(da)到(dao)一定(ding)的(de)(de)(de)(de)(de)電平(ping)射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，通(tong)過(guo)遠(yuan)端機(ji)(ji)的(de)(de)(de)(de)(de)射(she)(she)頻光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模(mo)塊(kuai)(kuai)進行(xing)(xing)(xing)電光(guang)(guang)(guang)(guang)(guang)轉(zhuan)換換成(cheng)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)并(bing)(bing)經(jing)(jing)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸(shu)(shu)至近(jin)(jin)(jin)(jin)端機(ji)(ji)，在近(jin)(jin)(jin)(jin)端機(ji)(ji)的(de)(de)(de)(de)(de)射(she)(she)頻光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模(mo)塊(kuai)(kuai)將接(jie)收(shou)到(dao)的(de)(de)(de)(de)(de)光(guang)(guang)(guang)(guang)(guang)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)轉(zhuan)化(hua)(hua)成(cheng)相(xiang)(xiang)應的(de)(de)(de)(de)(de)射(she)(she)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，并(bing)(bing)經(jing)(jing)功(gong)(gong)率(lv)(lv)放(fang)大(da)(da)器(qi)(qi)(qi)變(bian)為(wei)所(suo)需要的(de)(de)(de)(de)(de)功(gong)(gong)率(lv)(lv)電平(ping)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)，并(bing)(bing)入耦合(he)器(qi)(qi)(qi)耦合(he)發(fa)送(song)到(dao)基(ji)(ji)站(zhan)(zhan)，從而(er)構(gou)成(cheng)由(you)(you)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)作為(wei)傳(chuan)輸(shu)(shu)介質(zhi)的(de)(de)(de)(de)(de)光(guang)(guang)(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)(zhi)放(fang)站(zhan)(zhan)系統(tong)。