Eminyakeni yamuva, ngokuthuthukiswa okusheshayo kokuxhumana okungenazintambo kanye nobuchwepheshe be-radar, ukuze kuthuthukiswe ibanga lokudlulisela lesistimu, kuyadingeka ukwandisa amandla okudlulisa uhlelo. Njengengxenye yalo lonke uhlelo lwe-microwave, izixhumi ze-RF coaxial zidinga ukuthi zikwazi ukumelana nezidingo zokudlulisa amandla aphezulu. Ngasikhathi sinye, onjiniyela be-RF nabo badinga ukwenza izivivinyo nezilinganiso zamandla aphezulu njalo, futhi amadivayisi/izingxenye ze-microwave ezisetshenziselwa ukuhlola okuhlukahlukene nazo zidinga ukuthi zikwazi ukumelana namandla aphezulu. Yiziphi izici ezithinta umthamo wamandla we-RF coaxial connectors? Ake sibheke
●Usayizi wesixhumi
Kuzimpawu ze-RF zefrikhwensi efanayo, izixhumi ezinkulu zinokubekezelela amandla okukhulu. Isibonelo, usayizi wephinikhodi yesixhumi uhlobene nomthamo wamanje wesixhumi, ohlobene ngokuqondile namandla. Phakathi kwezixhumi ezihlukahlukene ezivame ukusetshenziswa ze-RF coaxial, 7/16 (DIN), 4.3-10, nezixhumi zohlobo lwe-N zinkulu ngosayizi, futhi osayizi bephinikhodi abahambisanayo nabo bakhulu. Ngokuvamile, ukubekezelelwa kwamandla kwezixhumi zohlobo lwe-N kumayelana ne-SMA izikhathi ezi-3-4. Ngaphezu kwalokho, izixhumi zohlobo lwe-N zivame ukusetshenziswa kakhulu, yingakho izinto eziningi ezingenzi lutho njengezixhumi nemithwalo engaphezu kuka-200W ziyizixhumi zohlobo lwe-N.
●Imvamisa yokusebenza
Ukubekezelela amandla kwezixhumi ze-coaxial ze-RF kuzokwehla njengoba imvamisa yesignali ikhula. Izinguquko kufrikhwensi yesignali yokudlulisa ziholela ngokuqondile ekulahlekelweni kanye nesilinganiso segagasi lokuma kwe-voltage, ngaleyo ndlela kuthinte umthamo wamandla okudlulisela kanye nomthelela wesikhumba. Isibonelo, isixhumi esijwayelekile se-SMA singamelana namandla angaba ngu-500W ku-2GHz, futhi amandla amaphakathi angamelana ngaphansi kuka-100W ku-18GHz.
●Isilinganiso segagasi lokuma kwe-voltage
Isixhumi se-RF sicacisa ubude obuthile bukagesi phakathi nomklamo. Emgqeni wobude obulinganiselwe, lapho i-impedance yesici kanye ne-impedance yomthwalo ingalingani, ingxenye ye-voltage kanye namanje kusukela ekugcineni komthwalo kuboniswa emuva ohlangothini lwamandla, olubizwa ngokuthi i-wave. Amagagasi abonisiwe; I-voltage kanye ne-current kusuka emthonjeni kuya emthwalweni kubizwa ngokuthi amagagasi esigameko. Igagasi eliwumphumela legagasi lesigameko kanye negagasi elibonisiwe libizwa ngokuthi igagasi elimile. Isilinganiso senani le-voltage ephezulu kanye nenani elincane legagasi elimile libizwa ngokuthi i-voltage standing wave ratio (kungase futhi kube yi-stand wave coefficient). Igagasi elibonisiwe lithatha isikhala somthamo wesiteshi, okwenza umthamo wamandla okudlulisela unciphe.
●Ukulahlekelwa kokufaka
Ukulahlekelwa kokufakwayo (IL) kubhekisela ekulahlekeni kwamandla entanjeni ngenxa yokwethulwa kwezixhumi ze-RF. Kuchazwa njengesilinganiso samandla okukhiphayo kumandla okufakwayo. Kunezici eziningi ezikhuphula ukulahleka kokufakwa kwesixhumi, ikakhulukazi okubangelwa: ukungafani kokubambezeleka kwesici, iphutha lokunemba komhlangano, igebe elibheke ekupheleni kokuhlangana, ukutsheka kwe-axis, i-lateral offset, i-eccentricity, ukunemba kokucubungula kanye ne-electroplating, njll. Ngenxa yokuba khona kokulahlekelwa, kunomehluko phakathi kwamandla okufaka nawokukhiphayo, okuzophinde kuthinte amandla okumelana.
●I-Altitude air pressure
Izinguquko kumfutho womoya zidala izinguquko ku-dielectric constant segment yomoya, futhi ngomfutho ophansi, umoya ufakwa kalula i-ion ukuze ukhiqize i-corona. Ukuphakama kokuphakama, ukwehla komfutho womoya kanye nomthamo wamandla omncane.
●Xhumana nokumelana
Ukumelana nokuxhumana kwesixhumi se-RF kubhekisela ekumelana nezindawo zokuxhumana zamakhondakta angaphakathi nangaphandle lapho isixhumi sihlanganiswa. Ngokuvamile isezingeni le-miliohm, futhi inani kufanele libe lincane ngangokunokwenzeka. Ngokuyinhloko ihlola izakhiwo zemishini zabathintana nabo, futhi imiphumela yokumelana nomzimba kanye nokumelana nokuhlanganiswa kwe-solder kufanele kususwe ngesikhathi sokulinganisa. Ukuba khona kokumelana nokuxhumana kuzobangela ukuthi abathintwayo bashise, kwenze kube nzima ukudlulisa amasignali ama-microwave amakhulu wamandla.
●Izinto ezihlangene
Uhlobo olufanayo lwesixhumi, kusetshenziswa izinto ezahlukahlukene, luzoba nokubekezelelana kwamandla okuhlukile.
Ngokuvamile, ngenxa yamandla we-antenna, cabangela amandla ayo kanye namandla esixhumi. Uma kunesidingo samandla aphezulu, ungangokwezifisoisixhumi sensimbi engagqwali, futhi 400W-500W akuyona inkinga.
E-mail:info@rf-miso.com
Ucingo: 0086-028-82695327
Iwebhusayithi: www.rf-miso.com
Isikhathi sokuthumela: Oct-12-2023
