Njengesebe le-eriyali, i-eriyali yesithuthi ineempawu zokusebenza ezifanayo kwezinye i-eriyali, kwaye iya kuhlangabezana neengxaki ezifanayo ekusebenziseni.
1. Okokuqala, yintoni ubudlelwane phakathi kwendawo yokufakela i-antenna yesithuthi kunye nokuqondisa kwayo?
Ngokwethiyori, i-antenna yesithuthi efakwe kwimoto ayinalathiso kwicala elithe tye, kodwa ngenxa yesimo esingaqhelekanga somzimba wemoto kunye nendawo yokufaka i-eriyali, ukufakelwa kwangempela kwe-eriyali ehambayo inokwalatha okuthile, kunye nokusebenza oku kuqondisa kwahlukile kuleyo ye-eriyali eqondisayo.Ubume bendlela ye-eriyali yemoto ayifani kwaye iyahluka ukusuka kwimoto ukuya kwimoto.
Ukuba i-eriyali ifakwe embindini wophahla, imitha ye-eriyali ngaphambili nangasemva iya kuba namandla kancinci kunendlela yasekhohlo nasekunene.Ukuba i-eriyali ixhonywe kwelinye icala, isiphumo semitha singcono kancinci kwelinye icala.Ngoko ke, ngamanye amaxesha sifumanisa ukuba xa sihamba ngendlela efanayo, umphumo wonxibelelwano ulungile, kodwa xa sibuyela emva, umphumo wokunxibelelana ngokuthe ngqo uhluke kakhulu, kuba umphumo wemitha ye-antenna kumacala omabini emoto uhlukile.
2. Kutheni iimpawu zonxibelelwano oluthe ngqo ziphazamiseka ekusebenziseni i-V/UHF yeselula?
Ngokuqhelekileyo, amaza e-V/UHF aneendlela ezininzi ngexesha lokudluliselwa, ezinye zifikelela kwindawo yokufumana kumgca othe ngqo, kwaye ezinye zifikelela kwindawo yokufumana emva kokucingisisa.Xa i-wave idlula kwi-beam ethe ngqo kunye ne-wave ebonakalisiweyo ikwisigaba esifanayo, ukuphakama kwamaza amabini kubangela ukomelezwa kwamandla omqondiso.Xa amaza angqalileyo nabonakalisiweyo ekwizigaba ezichaseneyo, i-superposition yawo iyacima enye nenye.Njengoko umgama phakathi kokusasaza kunye nokufumana isikhululo sikanomathotholo utshintsha rhoqo xa sihamba, ukuqina kwerediyo yerediyo nako kutshintsha ngokumangalisayo, okubonakaliswa kumqondiso wethutyana.
Ngesantya esihambayo esahlukileyo, isithuba sokutshintshana kokutshintsha koxinzelelo lwamaza erediyo nalo lwahlukile.Umgaqo wokutshintsha ngulo: iphezulu i-frequency yokusebenza, i-wavelength mfutshane, ngokukhawuleza isantya esishukumayo, iphezulu i-frequency ye-intermittent signal.Ngoko ke, xa ukupheliswa komqondiso kuchaphazela kakhulu unxibelelwano, unokucotha ukunciphisa isantya esihambayo, ufumane indawo apho umqondiso we-superposition unamandla, umise imoto kunxibelelwano oluthe ngqo, uze ubuyele endleleni.
3. Ufakelo oluthe nkqo lwe-eriyali yesithuthi okanye ufakelo lwe-oblique lungcono?
Izithuthi ezininzi zisebenzisa ii-eriyali ezithe nkqo ngenxa yezi zizathu zilandelayo: eyokuqala kukuba i-eriyali ethe tyaba iphola ngokwethiyori ayinamkhombandlela kwicala elithe tye, ukuze unomathotholo wesithuthi ekusetyenzisweni kweselula akufuneki ukuba azikhathaze ngokulungelelanisa indlela ye-eriyali;Okwesibini, i-eriyali ethe nkqo inokusebenzisa iqokobhe lesinyithi njenge-oscillator yayo, ukuze xa i-eriyali ethe nkqo isetyenziswa ngokwenene, sisiqingatha kuphela sokwenza izinto ezinokufakelwa, kwaye ezinye zingatshintshwa ngumzimba wemoto, onganciphisi kuphela. iindleko, kodwa iququzelela ufakelo kunye nokusetyenziswa.Okwesithathu kukuba i-antenna ethe nkqo ithatha indawo encinci, kwaye ukuchasana komoya kwe-antenna kuncinci, okulungele ukuhamba ngokukhawuleza.
Ngokwale mbono, indawo esiyifakileyo sisiqingatha kuphela se-eriyali ethe nkqo.Ke ngoko, xa i-eriyali inyuselwe kwicala elinye kwicala elinye, amaza erediyo akhutshwa yi-eriyali ayingomaza abekwe ngokuthe nkqo, kodwa ngumxube wamaza abekwe ngokuthe nkqo kunye namaza athe tye.Ukuba i-antenna efumana kwelinye icala ifumana amaza e-polarized vertically, Amandla ophawu olufunyenweyo luyancitshiswa (kunye ne-polarization ephantsi ethe tyaba), kwaye ngokuchaseneyo nomqondiso ofunyenweyo.Ukongeza, i-eriyali e-oblique yenza i-radiation ingalingani, ebonakaliswa njengemitha ye-eriyali ehamba phambili enkulu kunemitha engasemva, ekhokelela ekuqondiseni.
4. Ukusombulula njani ukuphazamiseka kwengxolo okuziswa yi-eriyali yesithuthi xa ufumana iimpawu?
Ukuphazamiseka kwengxolo ye-antenna ngokuqhelekileyo kwahlulwa kukuphazamiseka kwangaphandle kunye nokuphazamiseka kwangaphakathi kwiindidi ezimbini.Ukuphazamiseka kwangaphandle ngumqondiso wokuphazamiseka ofunyenwe kwi-antenna ngaphandle kwemoto, njengokuphazamiseka kwamashishini, ukuphazamiseka kombane wasezidolophini, enye i-radiation ye-radiation yesithuthi kunye nokuphazamiseka kwesibhakabhaka, isisombululo esinjalo sokuphazamiseka yindlela efanelekileyo yokuhlala kude nomthombo wokuphazamiseka.Ngokwesiqhelo, imowudi ye-FM kwibhendi ye-V/UHF inamandla okumelana nolu hlobo lokuphazamiseka.Emva kokuba isignali ingavulwa, isiphaluka somda wangaphakathi womatshini unokuphelisa ukuphazamiseka.Ngophazamiseko lwangaphakathi, unokuvavanya ngokulula kwaye umamele isikhululo sikanomathotholo esibuthathaka.Ukuba ukuphazamiseka akukukhulu, kubonisa ukuba akukho ngxaki ngokuphazamiseka kwenkqubo yesithuthi.Ukuba kukho ezinye iziphazamiso zangaphakathi, ukusebenzisa i-transceiver ebhodini kuya kusombulula ezininzi iingxaki.
Ixesha lokuposa: Nov-30-2022
