Inā ua hoʻohana mua ʻoe i ke kamaʻilio RF (alapine lekiō), nā pūnaewele kelepona, a i ʻole nā ʻōnaehana antenna, e hālāwai paha ʻoe me ka huaʻōlelo LMR cable. Akā he aha ia a no ke aha i hoʻohana nui ʻia ai? Ma kēia ʻatikala, e ʻimi mākou i ke ʻano o ke kaula LMR, kona mau ʻano koʻikoʻi, a no ke aha ʻo ia ke koho makemake ʻia no nā noi RF, a e pane i ka nīnau 'He aha ke kaula LMR?'.
E hoʻomaopopo i ke kaula coaxial LMR
ʻO ke kaula LMR kahi kaula coaxial i hoʻolālā ʻia no ka hoʻoili hōʻailona hana kiʻekiʻe, haʻahaʻa ka nalowale i nā noi RF. Hana ʻia nā kaula LMR e Times Microwave Systems a ua kaulana no ko lākou pale maikaʻi loa, haʻahaʻa ka nalowale hōʻailona, a me ke kūpaʻa, e kūpono ana iā lākou no ke kamaʻilio uea ʻole GPS, Koho kūpono no ka radar a me nā ʻōnaehana RF ʻē aʻe. ʻAʻole e like me nā kaula coaxial kuʻuna, ua hoʻolālā ʻia nā kaula LMR me nā papa he nui o ka pale a me nā mea dielectric e hōʻoia i ka pono o ka hōʻailona. Loaʻa lākou i nā nui like ʻole e koho ai, e like me LMR-195, LMR-240, LMR-400, a me LMR-600, i hoʻolālā ʻia no nā koi hana mana like ʻole a me ka nalowale hōʻailona.
Nā ʻano nui o ke kaula coaxial LMR
Kū i waho nā kaula LMR ma ke kahua o nā kaula coaxial ma muli o ko lākou ʻano kūikawā a me nā pono hana:
1. Pohō hōʻailona haʻahaʻa
ʻO kekahi o nā pono nui o nā kaula LMR me ka nalowale hōʻailona haʻahaʻa ʻo ia ko lākou attenuation haʻahaʻa ma nā mamao lōʻihi (pohō hōʻailona). Hoʻokō ʻia kēia ma o ka insulation dielectric kiʻekiʻe a me ka pale ʻana, kahi e hōʻemi ai i ka nalowale ikehu ke hele nā hōʻailona ma o nā kaula.
2. Hana pale maikaʻi loa
He nui nā papa pale o ka hoʻolālā kaula LMR, ʻo ia hoʻi ka pale ʻāpana alumini no ka pale mua ʻana o ka EMI (electromagnetic interference). Hoʻonui ka ulana ʻana i ka pale waho i ke kūpaʻa a hoʻemi hou i ka hoʻopilikia. Hōʻoia kēia pale i nā hōʻailona ikaika a maopopo hoʻi, e lilo ana nā kaula LMR i koho kūpono no nā noi RF koʻikoʻi.
3. Ka paʻa a me ke kūpaʻa ʻana i ka wā
Hana ʻo Times Microwave Systems i nā kaula LMR, nona ka ʻūpā waho paʻa i hana ʻia me ka polyethylene (PE) a i ʻole ka thermoplastic elastomer (TPE), e kū ai i ka radiation ultraviolet, ka makū, a me nā mahana koʻikoʻi. Hāʻawi kekahi mau ʻano like ʻole, e like me LMR-UF (Ultra Flex), i ka maʻalahi hou no nā hoʻonohonoho e pono ai ke kulou pinepine a me ka neʻe ʻana.
4. Hoʻonohonoho maʻalahi a kūpono hoʻi
Ke hoʻohālikelike ʻia me nā kaula coaxial paʻa kuʻuna, he kiʻekiʻe ka maʻalahi o nā kaula LMR a he māmā hoʻi, e maʻalahi ai ke kau ʻana. ʻOi aku ka liʻiliʻi o ko lākou radius pelu ma mua o nā kaula RF like, e ʻae ai i ke kau paʻa ʻana i nā wahi paʻa.
5. Hoʻohālikelike me nā mea hoʻohui RF
Kākoʻo nā kaula LMR i nā mea hoʻohui he nui, me nā mea hoʻohui ʻano N (hoʻohana pinepine ʻia i nā noi antenna a me RF). Mea hoʻohui SMA (no nā ʻōnaehana uea ʻole a me GPS). Mea hoʻohui BNC (kaulana i ka hoʻolaha a me ka pūnaewele). ʻO kēia kūlike e hoʻolilo iā lākou i mea maʻalahi loa i nā ʻoihana like ʻole.
Nā Hoʻohana Maʻamau o nā Kaula LMR
Mahalo i kāna hana maikaʻi loa, hoʻohana nui ʻia nā kaula LMR i nā ʻoihana e hilinaʻi nei i ka kamaʻilio RF. ʻO kekahi o nā noi maʻamau e pili ana i nā pūnaewele uea ʻole a me ke kelepona, nā ʻōnaehana antenna a me RF, nā kamaʻilio GPS a me nā ukali, nā noi aerospace, nā ʻōnaehana nānā a me nā palekana.
E koho i ke kaula LMR kūpono
ʻO ke koho ʻana o ke ʻano kaula LMR kūpono e pili ana i kekahi mau kumu, me ke alapine (frequency), ka mamao, ka lawelawe ʻana i ka mana, a me nā kūlana o ke kaiapuni. Eia kekahi mau koho maʻamau:
LMR-195 a me LMR-240: Kūpono no nā noi pōkole e like me nā antenna Wi Fi a me nā ʻōnaehana GPS.
LMR-400: He koho waena waena haʻahaʻa i hoʻohana pinepine ʻia i nā ʻōnaehana kelepona a me nā ʻōnaehana lekiō ʻelua ala.
LMR-600： He kūpono loa no nā noi mamao loa kahi e pono ai e hoʻemi nui ʻia ka nalowale o ka hōʻailona.
Inā makemake ʻoe i ka maʻalahi o nā polokalamu kelepona, he koho maikaʻi nō hoʻi ke kaula LMR-UF (Ultra Flex).
Ka manawa hoʻouna: Malaki-13-2025