Izixhumi ze-RF coaxial ziyizingxenye ezibalulekile zokudlulisa{0}}amasignali amaza aphezulu futhi zisetshenziswa kakhulu kwezokuxhumana, i-radar, i-aerospace, nezinye izinkambu. Umsebenzi wabo oyinhloko ukuhlinzeka ngoxhumano oluthembekile phakathi kwamadivayisi kuyilapho uqinisekisa ubuqotho besignali.
Isakhiwo esiyisisekelo sesixhumi se-coaxial se-RF sihlanganisa i-coaxial yangaphakathi, i-conductor yangaphandle (imvamisa iyihawu), kanye ne-dielectric evikelayo phakathi kwazo. I-conductor yangaphakathi idlulisa -i-frequency current ephezulu, kuyilapho i-conductor yangaphandle inikeza isivikelo saphansi, esivikela isignali ekuphazamisekeni kozibuthe kagesi. I-dielectric ye-insulating, ephakathi kwe-conductor yangaphakathi nangaphandle, igcina ukuhlukaniswa kukagesi futhi isekela umqhubi wangaphakathi. Lesi sakhiwo sinika amandla{4}}ukulahleka okuphansi kanye{5}}nokudluliswa kokuqina okuphezulu kwamasignali e-RF.
Umgomo wokusebenza usekelwe ezicini zokusabalalisa zamagagasi kagesi esakhiweni se-coaxial. Uma isignali ephezulu-yemvamisa idlula ku-conductor yangaphakathi, umphumela wokuvikela wekhondatha yangaphandle uvala inkambu kazibuthe esikhaleni esiphakathi kwamakhondaktha angaphakathi nangaphandle, enze iphethini yegagasi ye-TEM (transverse electromagnetic) ezinzile. Le phethini iqinisekisa imisebe ephansi kanye{3}}nokulahlekelwa ukudluliswa kwesiginali. Idizayini yesixhumi kufanele ifaniswe ngokunembile ukuze kuqinisekiswe ukuqhubeka phakathi kwamakhondaktha angaphakathi nangaphandle ukuze kugwenywe ukubonakaliswa kwesignali noma ukulahlekelwa kwamandla ngenxa yokungalingani kahle kwe-impedance.
Ukhiye ekusebenzeni kwezixhumi ze-RF coaxial usekufanisweni kwazo kokuphazamiseka, ngokuvamile okungu-50Ω noma okungu-75Ω ukuze kuhlangatshezwane nezidingo ezihlukile zohlelo lokusebenza. Ukungahambisani kahle kwe-impedance kungaholela ekubonakalisweni kwesignali, ukunciphisa ukusebenza kahle kokudlulisela, ngisho nokulimala kwemishini. Ngakho-ke, ijiyomethri yesixhumi, ukukhethwa kwempahla, nokunemba komshini kulungiselelwa ngokuqinile ukuze kuqinisekiswe ukuguquka okushelelayo kwamasignali{4}emvamisa aphezulu endaweni yokuxhumana.
Ngaphezu kwalokho, izixhumi ze-RF coaxial kumele zibonise ukuzinza okuhle kakhulu kwemishini kanye nokuvumelana nezimo zemvelo, njengokumelana nezinga lokushisa eliphezulu, umswakama, nokudlidliza, ukuze kuhlangatshezwane nezidingo zezimo zokusebenza eziyinkimbinkimbi. Ngamafuphi, izixhumi ze-RF coaxial, ngedizayini ye-electromagnetic nemishini eyinkimbinkimbi, zifinyelela ukudluliswa okuphumelelayo nokuzinzile kwamasignali{1}}emvamisa ephezulu, okuwenza abe ingxenye ebalulekile yamasistimu esimanje kagesi.