Eminyakeni yamuva nje, ngentuthuko esheshayo yokuxhumana okungenantambo kanye nobuchwepheshe be-radar, ukuze kuthuthukiswe ibanga lokudlulisela lesistimu, kubalulekile ukwandisa amandla okudlulisela esistimu. Njengengxenye yesistimu yonke ye-microwave, izixhumi ze-RF coaxial kudingeka zikwazi ukumelana nezidingo zokudlulisela zamandla aphezulu. Ngesikhathi esifanayo, onjiniyela be-RF nabo kudingeka benze njalo ukuhlolwa kwamandla aphezulu kanye nokulinganisa, futhi amadivayisi/izingxenye ze-microwave ezisetshenziselwa izivivinyo ezahlukahlukene nazo kudingeka zikwazi ukumelana namandla aphezulu. Yiziphi izici ezithinta amandla okudlulisela izixhumi ze-RF coaxial? Ake sibheke.
●Usayizi wesixhumi
Kumasignali e-RF anemvamisa efanayo, izixhumi ezinkulu zinokubekezelelana kwamandla okukhulu. Isibonelo, usayizi we-pinhole yesixhumi uhlobene nomthamo wamanje wesixhumi, ohlobene ngqo namandla. Phakathi kwezixhumi ze-RF coaxial ezisetshenziswa kakhulu, i-7/16 (DIN), i-4.3-10, kanye nezixhumi zohlobo lwe-N zikhulu ngosayizi, kanti nosayizi we-pinhole ohambisanayo nawo mkhulu. Ngokuvamile, ukubekezelelana kwamandla kwezixhumi zohlobo lwe-N cishe kungama-SMA izikhathi ezingu-3-4. Ngaphezu kwalokho, izixhumi zohlobo lwe-N zisetshenziswa kakhulu, yingakho izingxenye eziningi ezingasebenzi njengezixhumi ezinciphisayo kanye nemithwalo engaphezu kuka-200W ziyizixhumi zohlobo lwe-N.
●Imvamisa yokusebenza
Ukubekezelela amandla ezixhumi ze-RF coaxial kuzoncipha njengoba imvamisa yesignali ikhula. Izinguquko kumvamisa yesignali yokudlulisa ziholela ngqo ekushintsheni kokulahlekelwa kanye nesilinganiso samagagasi okuma kwe-voltage, ngaleyo ndlela kuthinte amandla okudlulisa kanye nomphumela wesikhumba. Isibonelo, isixhumi se-SMA esijwayelekile singamelana namandla angaba ngu-500W ku-2GHz, kanti amandla ajwayelekile angamelana nangaphansi kuka-100W ku-18GHz.
●Isilinganiso segagasi lokuma kwe-voltage
Isixhumi se-RF sichaza ubude obuthile bukagesi ngesikhathi sokuklama. Emgqeni wobude obulinganiselwe, lapho i-impedance ephawulekayo kanye ne-impedance yomthwalo ingalingani, ingxenye ye-voltage kanye nomsinga kusukela ekugcineni komthwalo iboniswa emuva ohlangothini lwamandla, olubizwa ngokuthi i-wave. Amagagasi abonisiwe; i-voltage kanye nomsinga kusukela emthonjeni kuya emthwalweni kubizwa ngokuthi amagagasi e-incident. Igagasi eliphumelayo legagasi le-incident kanye negagasi elibonisiwe libizwa ngokuthi i-standing wave. Isilinganiso senani le-voltage ephezulu kanye nenani eliphansi legagasi elimisiwe libizwa ngokuthi i-voltage standing wave ratio (kungaba futhi i-standing wave coefficient). Igagasi elibonisiwe lithatha isikhala somthamo wesiteshi, okwenza amandla okudlulisa anciphe.
●Ukulahleka kokufakwa
Ukulahlekelwa kokufakwa (IL) kubhekisela ekulahlekelweni kwamandla emgqeni ngenxa yokwethulwa kwezixhumi ze-RF. Kuchazwa njengesilinganiso samandla okukhipha amandla okufaka. Kunezici eziningi ezandisa ukulahleka kokufakwa kwesixhumi, okubangelwa kakhulu yi: ukungalingani kwe-impedance yesici, iphutha lokunemba kwenhlangano, igebe lobuso bokumatanisa, ukuthambekela kwe-axis, i-offset eseceleni, ukungafani, ukunemba kokucubungula kanye ne-electroplating, njll. Ngenxa yokuba khona kokulahlekelwa, kukhona umehluko phakathi kwamandla okufaka nawokukhipha, okuzophinde kuthinte amandla okumelana nawo.
●Umfutho womoya ophakeme
Izinguquko ekucindezelweni komoya zibangela izinguquko ekuqineni kwe-dielectric kwengxenye yomoya, futhi ekucindezelweni okuphansi, umoya uguqulwa kalula ukuze ukhiqize i-corona. Uma ukuphakama kuphakeme, kulapho umfutho womoya uphansi futhi kulapho amandla amancane.
●Ukumelana kokuthintana
Ukumelana kokuxhumana kwesixhumi se-RF kubhekisela ekumelaneni kwamaphuzu okuxhumana kwabaqhubi bangaphakathi nabangaphandle lapho isixhumi sihlanganiswa. Ngokuvamile sisezingeni le-milliohm, futhi inani kufanele libe lincane ngangokunokwenzeka. Ngokuyinhloko lihlola izakhiwo zemishini zalabo oxhumana nabo, futhi imiphumela yokumelana komzimba kanye nokumelana kwamalunga e-solder kufanele kususwe ngesikhathi sokulinganisa. Ukuba khona kokumelana kokuxhumana kuzokwenza ukuthi oxhumana nabo bashise, okwenza kube nzima ukudlulisa izimpawu ze-microwave ezinamandla amakhulu.
●Izinto zokuhlanganisa
Uhlobo olufanayo lwesixhumi, olusebenzisa izinto ezahlukene, luzoba nokubekezelela amandla okuhlukile.
Ngokuvamile, ngamandla e-antenna, cabanga ngamandla ayo kanye namandla esixhumi. Uma kunesidingo samandla aphezulu, ungakwaziyenza ngendlela oyifisayoisixhumi sensimbi engagqwali, kanye ne-400W-500W akuyona inkinga.
E-mail:info@rf-miso.com
Ucingo: 0086-028-82695327
Iwebhusayithi: www.rf-miso.com
Isikhathi sokuthunyelwe: Okthoba-12-2023
