Uma wake wasebenzisa ukuxhumana kwe-RF (Radio Frequency), amanethiwekhi amaselula, noma amasistimu we-antenna, ungahlangana nethemu le-LMR ikhebula. Kepha yini ngempela futhi kungani isetshenziswa kabanzi? Kulesi sihloko, sizohlola ukuthi yiliphi ikhebula le-LMR, izici zalo ezibalulekile, nokuthi kungani kuyindlela ekhethwayo yezinhlelo zokusebenza ze-RF, futhi uphendule umbuzo othi 'Iyini ikhebula le-LMR?'.
Qonda ikhebula le-LMR Coaxial
I-LMR Cable yikhebula le-coayial elenzelwe ukusebenza okuphezulu, ukuhambisa okuphansi kwesiginali kuhlelo lwe-RF. Izintambo ze-LMR zenziwa ngezikhathi ze-Microwave Systems futhi zidume ngokuvikelwa kwazo ezinhle kakhulu, ukulahleka kwesiginali ephansi, nokuqina, kubenze balungele ukuxhumana kwe-GPS okungenantambo, ukukhetha okuhle kwe-radar nezinye izinhlelo ze-RF. Ngokungafani nezintambo zendabuko zendabuko, amakhekhe we-LMR aklanywe ngezendlalelo eziningi zokuvikela nezinto zokwakha dielectric ukuqinisekisa ubuqotho be-Signal obungcono. Beza ngosayizi abahlukahlukene ukuthi bakhethe, njenge-LMR-195, LMR-240, LMR-400, ne-LMR-600, ngamunye aklanyelwe ukucubungula amandla ahlukile kanye nezidingo zokulahlekelwa yizimpawu ezihlukile.
Izici eziyinhloko zekhebula le-LMR COAXIAL
Amakhebula we-LMR avelele emkhakheni wezintambo ze-coaxial ngenxa yesakhiwo sazo esiyingqayizivele kanye nezinzuzo zokusebenza:
1. Ukulahleka kwesiginali okuphansi
Enye yezinzuzo ezibaluleke kakhulu zezintambo ze-LMR ezinokulahleka kwesiginali okuphansi yi-attiation yazo ephansi ngamabanga amade (ukulahleka kwesiginali). Lokhu kutholakala ngokufakwa kwekhwalithi ephezulu ye-dielectric kanye nokuvikela, okunciphisa ukulahleka kwamandla lapho amasiginali edlula amakhebuli.
2. Ukusebenza okuhle kakhulu kokuvikela
I-LMR Cable Design inezendlalelo eziningi zokuvikelwa, imvamisa kufaka phakathi i-aluminium strip Shied yokuvikelwa kwe-EMI eyinhloko (yokuphazamiseka kwe-electromagnetic). Ukuluka kwangaphandle okuvikelekile kuthuthukisa ukuqina futhi kunciphise ukuphazamiseka. Lokhu kuvikelwa kuqinisekisa amasiginali aqine futhi acacile, okwenza i-LMR ikhabe ukukhetha okuhle kwezicelo ezibucayi ze-RF.
3. Ukuqina kanye nokumelana nesimo sezulu
Ama-Times Microwave Systems akhiqiza amakhebuli e-LMR, aqinile aqinile we-sheath angaphandle enziwe nge-polyethylene (pe) noma i-thermoplastic elatomer (TPE), okwenza kube lumelane nemisebe ye-ultraviolet, umswakama, kanye namazinga okushisa athe xaxa. Okunye okuhlukahlukene, njenge-LMR-UF (Ultra Flex), ahlinzeke ngezifiso ezengeziwe zokufakwa okudinga ukugoba njalo nokunyakaza.
4. Ukufakwa okuguquguqukayo nokulula
Uma kuqhathaniswa nezintambo zendabuko ze-coaxial caaxial, amakhebuli e-LMR anokuguquguquka okuphezulu nokungasindi, okwenza ukufakwa kube lula. Umsakazo wabo wokugoba umncane kakhulu kunaleso sezintambo ezifanayo ze-RF, ezivumela ukufakwa okuqinile ezindaweni ezivalekile.
5. Ukuhambisana nezixhumi ze-RF
Amakhabetheli we-LMR asekela izixhumi eziningi, kufaka phakathi izixhumi zohlobo lwe-N (ezisetshenziswa kakhulu ku-antenna kanye nezicelo ze-RF). Isixhumi se-SMA (ngezinhlelo ezingenantambo nezinhlelo ze-GPS). Isixhumi se-BNC (sathandwa ekusakazweni nasekunethiwekhi). Lokhu kuhambisana kubenza baguquguquke kakhulu ezimbonini ezahlukahlukene.
Ukusetshenziswa okujwayelekile kwezintambo ze-LMR
Ngenxa yokusebenza kwayo okuhle kakhulu, amakhekhe we-LMR asetshenziswa kabanzi ezimbonini ezincike ekuxhumaneni kwe-RF. Ezinye izinhlelo ezivame kakhulu zifaka amanethiwekhi angenantambo namaselula, ama-antenna kanye nezinhlelo ze-RF, i-GPS kanye nokuxhumana kwe-satellite, izinhlelo ze-aerospace, izinhlelo zokuhlola kanye nezinhlelo zokuphepha.
Khetha ikhebula le-LMR elifanele
Ukukhethwa kohlobo lwe-LMR olufanele lwe-LMR kuncike ezicini eziningana, kufaka phakathi imvamisa, ibanga, ukuphatha amandla, kanye nezimo zemvelo. Nazi ezinye izinketho ezivamile:
I-LMR-195 ne-LMR-240: Ilungele izinhlelo zokusebenza ezinamafuphi njenge-WI FI Antennas nezinhlelo ze-GPS.
I-LMR-400: Ukulahleka okuphansi okuphakathi nendawo okuhlala kusetshenziswa ezinhlelweni zomsakazo zeselula nambili.
I-LMR-600: Ilungele kakhulu izicelo zebanga elide lapho ukulahleka kwesiginali kufanele kuncishiswe kakhulu.
Uma udinga ukuguquguquka kwezicelo zeselula, i-LMR-UF (Ultra Flex) ikhebula futhi liyikhetho elihle.
Isikhathi sePosi: Mar-13-2025