Ukuba wakha wasebenzisa unxibelelwano lwe-RF (radio frequency), iinethiwekhi zeselula, okanye iinkqubo ze-antenna, ungadibana negama elithi intambo ye-LMR. Kodwa yintoni kanye kanye kwaye kutheni isetyenziswa kakhulu? Kweli nqaku, siza kuhlola ukuba yintoni intambo ye-LMR, iimpawu zayo eziphambili, kunye nokuba kutheni ilukhetho olukhethwayo kwizicelo ze-RF, kwaye siphendule umbuzo othi 'Yintoni intambo ye-LMR?'.
Qonda intambo ye-coaxial ye-LMR
Intambo ye-LMR yintambo ye-coaxial eyenzelwe ukuhanjiswa kwesignali esebenza kakuhle, elahlekileyo kancinci kwizicelo ze-RF. Iintambo ze-LMR zenziwe yiTimes Microwave Systems kwaye zaziwa ngokukhusela kwazo okugqwesileyo, ukulahleka kwesignali okuphantsi, kunye nokuqina, okwenza ukuba zilungele unxibelelwano olungenazingcingo lwe-GPS, Ukhetho olufanelekileyo kwiinkqubo ezisekwe kwi-radar kunye nezinye iinkqubo ezisekwe kwi-RF. Ngokungafaniyo neentambo ze-coaxial zemveli, iintambo ze-LMR ziyilwe ngeeleya ezininzi zokukhusela kunye nezixhobo ze-dielectric ukuqinisekisa ukuthembeka okungcono kwesignali. Ziza ngobukhulu obahlukeneyo onokukhetha kuzo, njenge-LMR-195, i-LMR-240, i-LMR-400, kunye ne-LMR-600, nganye yenzelwe iimfuno ezahlukeneyo zokucubungula amandla kunye nokulahleka kwesignali.
Iimpawu eziphambili zentambo ye-coaxial ye-LMR
Iintambo ze-LMR zibalasele kwicandelo leentambo ze-coaxial ngenxa yesakhiwo sazo esahlukileyo kunye neenzuzo zokusebenza:
1. Ukulahleka kwesiginali ephantsi
Enye yezona nzuzo zibalulekileyo zeentambo ze-LMR ezinelahleko ephantsi yesignali kukuncitshiswa kwazo okuncinci kumgama omde (ukulahleka kwesignali). Oku kufezekiswa ngokugquma kunye nokukhusela nge-dielectric esemgangathweni ophezulu, okunciphisa ukulahleka kwamandla xa iimpawu zidlula kwiintambo.
2. Ukusebenza kakuhle kokukhusela
Uyilo lweentambo ze-LMR luneengqimba ezininzi zokukhusela, ezidla ngokuquka ukhuselo lwe-aluminium strip ukukhusela i-EMI (ukuphazamiseka kwe-electromagnetic). Ukuluka ukhuselo lwangaphandle kuphucula ukuqina kwaye kunciphisa ukuphazamiseka ngakumbi. Olu khuselo luqinisekisa imiqondiso eqinileyo necacileyo, okwenza iintambo ze-LMR zibe lukhetho olufanelekileyo kwizicelo ze-RF ezinobuthathaka.
3. Ukuqina kunye nokumelana nemozulu
I-Times Microwave Systems ivelisa iintambo ze-LMR, ezinendawo yazo eqinileyo yangaphandle eyenziwe nge-polyethylene (PE) okanye i-thermoplastic elastomer (TPE), nto leyo eyenza ukuba imelane nemisebe ye-ultraviolet, ukufuma, kunye nobushushu obugqithisileyo. Ezinye iintlobo, ezifana ne-LMR-UF (Ultra Flex), zibonelela ngokuguquguquka okongezelelweyo kokufakelwa okufuna ukugoba kunye nokuhamba rhoqo.
4. Ufakelo oluguquguqukayo nolulula
Xa kuthelekiswa neentambo ze-coaxial eziqinileyo zemveli, iintambo ze-LMR zinokuguquguquka okuphezulu kwaye zikhaphukhaphu, nto leyo eyenza ukufakwa kube lula. Irediyasi yazo yokugoba incinci kakhulu kuneentambo ze-RF ezifanayo, nto leyo evumela ukufakwa okuqinileyo kwiindawo ezivalekileyo.
5. Ukuhambelana nezihlanganisi zeRF
Iintambo ze-LMR zixhasa izihlanganisi ezininzi, kuquka izihlanganisi zohlobo lwe-N (ezisetyenziswa rhoqo kwi-antenna kunye ne-RF applications). Isihlanganisi se-SMA (seenkqubo ezingenazingcingo kunye ne-GPS). Isihlanganisi se-BNC (esidumileyo kusasazo nakwinethiwekhi). Oku kuhambelana kuzenza zibe nokuguquguquka kakhulu kumashishini ahlukeneyo.
Usetyenziso Oluqhelekileyo lweeCables zeLMR
Ngenxa yokusebenza kwayo okugqwesileyo, iintambo ze-LMR zisetyenziswa kakhulu kumashishini axhomekeke kunxibelelwano lwe-RF. Ezinye zezona zicelo zixhaphakileyo ziquka iinethiwekhi ezingenazingcingo nezeselula, iinkqubo ze-antenna kunye ne-RF, unxibelelwano lwe-GPS kunye nesathelayithi, usetyenziso lweenqwelo-moya, iinkqubo zokubeka esweni kunye nokhuseleko.
Khetha intambo ye-LMR echanekileyo
Ukukhethwa kohlobo oluchanekileyo lwentambo ye-LMR kuxhomekeke kwizinto ezininzi, kuquka ubuninzi, umgama, ukuphathwa kwamandla, kunye neemeko zokusingqongileyo. Nazi ezinye iindlela eziqhelekileyo:
I-LMR-195 kunye ne-LMR-240: Ifanelekile kwii-applications ezikufutshane ezifana nee-antenna ze-Wi Fi kunye neenkqubo ze-GPS.
I-LMR-400: Ukhetho oluphakathi olunelahleko ephantsi olusetyenziswa rhoqo kwiinkqubo zerediyo zeselula kunye neenkqubo zerediyo ezisebenzisa iindlela ezimbini.
I-LMR-600: Ifanelekile kakhulu kwiindlela ezikude apho ukulahleka kwesiginali kufuneka kuncitshiswe kakhulu.
Ukuba ufuna ukuguquguquka kwezicelo zeselfowuni, intambo ye-LMR-UF (Ultra Flex) nayo ilungile.
Ixesha leposi: Matshi-13-2025