Uma uke wasebenzisa ukuxhumana kwe-RF (imvamisa yomsakazo), amanethiwekhi eselula, noma izinhlelo ze-antenna, ungase uhlangane negama elithi ikhebula le-LMR. Kodwa liyini ngempela futhi kungani lisetshenziswa kabanzi kangaka? Kulesi sihloko, sizohlola ukuthi liyini ikhebula le-LMR, izici zalo ezibalulekile, nokuthi kungani liyisinqumo esikhethwayo sezinhlelo zokusebenza ze-RF, bese siphendula umbuzo othi 'Liyini ikhebula le-LMR?'.
Qonda ikhebula le-coaxial le-LMR
Ikhebula le-LMR liyikhebula le-coaxial elenzelwe ukusebenza okuphezulu, ukulahleka okuphansi kwesignali kuzinhlelo zokusebenza ze-RF. Izintambo ze-LMR zakhiwa yi-Times Microwave Systems futhi zaziwa ngokuvikela kwazo okuhle kakhulu, ukulahleka okuphansi kwesignali, kanye nokuqina, okwenza zibe zilungele ukuxhumana okungenantambo kwe-GPS, Ukukhetha okuhle kakhulu kwezinhlelo ezisekelwe ku-radar nezinye izinhlelo ze-RF. Ngokungafani nezintambo ze-coaxial zendabuko, izintambo ze-LMR zenzelwe izendlalelo eziningi zokuvikela kanye nezinto ze-dielectric ukuqinisekisa ubuqotho besignali obungcono. Ziza ngobukhulu obuhlukahlukene ongakhetha kuzo, njenge-LMR-195, i-LMR-240, i-LMR-400, kanye ne-LMR-600, ngayinye yenzelwe izidingo ezahlukene zokucubungula amandla kanye nokulahlekelwa kwesignali.
Izici eziyinhloko zekhebula le-coaxial le-LMR
Izintambo ze-LMR zivelele emkhakheni wezintambo ze-coaxial ngenxa yesakhiwo sazo esiyingqayizivele kanye nezinzuzo zokusebenza:
1. Ukulahleka kwesignali okuphansi
Enye yezinzuzo ezibaluleke kakhulu zezintambo ze-LMR ezinokulahleka okuphansi kwesiginali ukuncipha kwazo okuphansi ebangeni elide (ukulahleka kwesiginali). Lokhu kufezwa ngokufakwa kokushisa kwe-dielectric okusezingeni eliphezulu kanye nokuvikela, okunciphisa ukulahlekelwa amandla lapho izimpawu zidlula ezintanjeni.
2. Ukusebenza kahle kakhulu kokuvikela
Umklamo wekhebula le-LMR unezendlalelo eziningi zokuvikela, ngokuvamile kufaka phakathi ukuvikela i-aluminium strip ukuze kuvikelwe i-EMI (ukuphazamiseka kwe-electromagnetic). Ukulukwa kokuvikela kwangaphandle kuthuthukisa ukuqina futhi kunciphisa kakhulu ukuphazamiseka. Lokhu kuvikela kuqinisekisa izimpawu eziqinile nezicacile, okwenza izintambo ze-LMR zibe ukukhetha okuhle kwezinhlelo zokusebenza ze-RF ezibucayi.
3. Ukuqina kanye nokumelana nesimo sezulu
I-Times Microwave Systems ikhiqiza izintambo ze-LMR, eziqinile ngaphandle kwazo ezenziwe nge-polyethylene (PE) noma i-thermoplastic elastomer (TPE), okwenza ukuthi imelane nemisebe ye-ultraviolet, umswakama, kanye namazinga okushisa aphezulu. Ezinye izinhlobo, njenge-LMR-UF (Ultra Flex), zinikeza ukuguquguquka okwengeziwe kokufakwa okudinga ukugoba nokunyakaza njalo.
4. Ukufakwa okuguquguqukayo nokulula
Uma kuqhathaniswa nezintambo ze-coaxial eziqinile zendabuko, izintambo ze-LMR zinokuguquguquka okuphezulu futhi zilula, okwenza ukufakwa kube lula. Irediyasi yazo yokugoba incane kakhulu kunezintambo ze-RF ezifanayo, okuvumela ukufakwa okuqinile ezindaweni ezivalekile.
5. Ukuhambisana nezixhumi ze-RF
Izintambo ze-LMR zisekela izixhumi eziningi, kufaka phakathi izixhumi zohlobo lwe-N (ezivame ukusetshenziswa ezinhlelweni ze-antenna kanye ne-RF). Isixhumi se-SMA (sezinhlelo ezingenantambo kanye ne-GPS). Isixhumi se-BNC (esidumile ekusakazeni kanye nasekuxhumaneni). Lokhu kuhambisana kuzenza ziguquguquke kakhulu emikhakheni eyahlukahlukene.
Ukusetshenziswa Okuvamile Kwezintambo ze-LMR
Ngenxa yokusebenza kwayo okuhle kakhulu, izintambo ze-LMR zisetshenziswa kabanzi ezimbonini ezithembele ekuxhumaneni kwe-RF. Ezinye zezinhlelo zokusebenza ezivame kakhulu zifaka phakathi amanethiwekhi angenantambo namaselula, izinhlelo ze-antenna ne-RF, ukuxhumana kwe-GPS nesathelayithi, izinhlelo zokusebenza zezindiza, izinhlelo zokuqapha kanye nezokuphepha.
Khetha ikhebula le-LMR elifanele
Ukukhethwa kohlobo lwekhebula le-LMR olufanele kuncike ezintweni eziningana, okuhlanganisa imvamisa, ibanga, ukuphathwa kwamandla, kanye nezimo zemvelo. Nazi ezinye izinketho ezivamile:
I-LMR-195 kanye ne-LMR-240: Ifanele izinhlelo zokusebenza zesikhathi esifushane njenge-antenna ye-Wi Fi kanye nezinhlelo ze-GPS.
I-LMR-400: Inketho yokulahlekelwa okuphansi kwebanga eliphakathi evame ukusetshenziswa ezinhlelweni zomsakazo weselula kanye nowezindlela ezimbili.
I-LMR-600: Ifaneleka kakhulu ekusetshenzisweni kwebanga elide lapho ukulahleka kwesiginali kufanele kuncishiswe kakhulu.
Uma udinga ukuguquguquka kwezinhlelo zokusebenza zeselula, ikhebula le-LMR-UF (Ultra Flex) nalo liyisinqumo esihle.
Isikhathi sokuthunyelwe: Mashi-13-2025