Kwiminyaka yakutshanje, ngenjongo yokugcina iindleko kunye nokunciphisa ukuphindaphinda kokwakhiwa, iinkqubo ezininzi zokusasazwa kwangaphakathi ziye zamkela imodeli yenkqubo edibeneyo edibeneyo eyabelana ngegumbi kunye nezinye ii-sub-systems. Oku kuthetha ukuba ii-multi-system kunye ne-multi-band signals zixutywe ngaphakathi kweeplatifti zendibaniselwano eziqhelekileyo kunye neenkqubo zokusasazwa kwangaphakathi kwangaphakathi ukuze kuphunyezwe i-multi-band, i-multi-system, indlela enye, okanye ukuhanjiswa kweendlela ezimbini.
Inzuzo kukunciphisa ukuphinda-phindwa kweziseko ezingundoqo nokonga indawo. Nangona kunjalo, iingxaki ezibangelwa ziinkqubo ezinjalo zokusasazwa kwangaphakathi zivela ngakumbi. Ukuhlalisana kweenkqubo ezininzi ngokungathintelekiyo kwazisa uphazamiseko phakathi kwenkqubo. Ngokukodwa, iibhendi ze-frequency yokusebenza ziyafana, kwaye iibhendi zekhefu zincinci, ukukhutshwa kobubuxoki kunye ne-PIM phakathi kweenkqubo ezahlukeneyo nazo ziyachaphazeleka.
Kule meko, isixhobo esilungileyo sokwenza izinto singanciphisa iziphumo zolu kuphazamiseka. Isixhobo esikwizinga eliphantsi le-RF esenziwayo ngokwaso siya kukhokelela ekwehleni kwezinye izikhombisi zenethiwekhi, kwaye izixhobo ezikumgangatho ophezulu ziya kuba nesiphumo esihle kumgangatho wothungelwano, ukuthintela ukwenzeka kwezinto ezikhutshwayo ezinganyanisekanga, ukuphazamiseka, kunye nokwahlukaniswa.
Iindidi eziphambili zokuphazamiseka kwiinethiwekhi ezingenazintambo zihlulwe kwi-in-system interference kunye ne-inter-system interference. I-in-system interference ibhekisela kwii-strays ze-band transmit, eziwela ekuphazamisekeni kwenkqubo ngokwayo ebangelwa liqela elifumanayo. Uphazamiseko lwenkqubo phakathi ikakhulu lukhupho olungeyonyani, ukwahlulwa kommkeli, kunye nophazamiseko lwePIM.
Ngokuxhomekeke kuthungelwano oluqhelekileyo kunye nemeko yokuvavanya, izixhobo ze-passive ziyinto ephambili echaphazela amanethiwekhi aqhelekileyo.
Imiba ephambili yokwenza icandelo lokwenziwa okulungileyo libandakanya:
1. Ukuba wedwa
Ukwahlukaniswa okungahambi kakuhle kuya kubangela ukuphazamiseka phakathi kweenkqubo, ukuqhuba kwe-PIM elahlekileyo kunye ne-multi-carrier carrier, emva koko ukuphazamisa umqondiso we-terminal upstream.
2. VSWR
Kwimeko ye-VSWR ye-passive components inkulu xa kuthelekiswa, isignali ebonakalisiweyo iba nkulu, kwiimeko ezinzima isikhululo esisisiseko siya kwaziswa ngomonakalo kwizinto ze-RF kunye ne-amplifiers.
3. Ukwaliwa kwi-out-of-band
Ukuchaswa okungahambi kakuhle kwe-band-out-of-band kuya kwandisa ukuphazamiseka kwe-inter-system, kodwa ikhono elihle lokuthintela ngaphandle kwe-band, kunye nokuhlukaniswa kwe-port okulungileyo kuya kunceda ukunciphisa ukuphazamiseka phakathi kweenkqubo.
4. I-PIM - i-intermodulation yokwenziwa
Iimveliso ezinkulu ze-PIM ziwela kwibhendi ephezulu iya kubangela ukuwohloka kokusebenza kommkeli.
5. Umthamo wamandla
Kwimeko ye-multi-carrier, i-high power output, kunye ne-high-peak ratio yesignali, ukungonelanga kwamandla kuya kukhokelela kumthwalo ophezulu wenkqubo. Oku kubangela ukuba umgangatho womnatha wehle kakhulu, obangela ukuba i-arcing kunye neemeko zomlilo. Kwiimeko ezinzima, kunokwenzeka ukuphula okanye ukutshisa izixhobo, okubangela ukuba inethiwekhi yesitishi esisezantsi iwa.
6. Inkqubo yokucubungula isixhobo kunye nezixhobo
Izinto eziphathekayo kunye neenkqubo zokucubungula azivalwanga, zikhokelela ngokuthe ngqo kwiparameter yokusebenza kwesixhobo, ngelixa ukuqina kwesixhobo kunye nokulungelelaniswa kokusingqongileyo kuncitshiswe kakhulu.
Ukongeza kule miba iphambili ingentla, kukho imiba eqhelekileyo ngolu hlobo lulandelayo:
1. Ilahleko yokufaka
Ukufakwa kwelahleko ngaphezulu kwe-assembly kwenza umqondiso ulahlekelwe amandla angakumbi kwikhonkco elichaphazela ukhuselo, ngelixa ukonyusa isikhululo esithe ngqo kuya kuzisa uphazamiseko olutsha, kunye nokuphucula ngokulula isiseko sothumelo lwesikhululo samandla asihambelani nokusingqongileyo, kwaye ngaphaya komgca we-amplifier owona mgangatho wokusebenza womda. xa umgangatho wesiginali yokuhambisa uya kuhla, uya kuchaphazela ukufezekiswa okulindelweyo koyilo lokuhambisa lwangaphakathi.
2. Ukuguquguquka kwe-band
Ukuguquguquka okukhulu kuya kukhokelela kwi-flatness embi ye-in-band signal, xa kukho abathwali abaninzi abaza kugubungela impembelelo, kwaye bachaphazele ukuphunyezwa okulindelekileyo koyilo lokusasazwa kwangaphakathi.
Ke ngoko, amacandelo asebenzayo adlala indima ephambili ekwakhiweni kwesikhululo sesiseko sothungelwano lwe-ae.
I-Jingxin igxile kwiukulungelelanisa amalungu okwenziwaezifunekayo kubathengi, nokuba kuvavanyo lokuqala, ingcebiso yoyilo lwaphakathi, okanye imveliso enkulu kade, sibambelela kumgangatho wokuqala, ukubonelela ngeenkonzo kubathengi kwihlabathi liphela.
Ixesha lokuposa: Oct-13-2021
