ʻO ka loaʻa ʻana o ka Antenna e pili ana i ka loaʻa ʻana o ka mana radiated o kahi antenna i kahi kuhikuhi kikoʻī e pili ana i kahi antenna kumu kumu kūpono. Hōʻike ia i ka hiki o ka radiation o ka antenna ma kahi kuhikuhi kikoʻī, ʻo ia hoʻi, ka hoʻokipa hōʻailona a i ʻole ka hoʻokuʻu ʻana o ka antenna ma kēlā ʻaoʻao. ʻOi aku ka kiʻekiʻe o ka loaʻa ʻana o ka antenna, ʻoi aku ka maikaʻi o ka hana antenna i kahi kuhikuhi kikoʻī a hiki ke loaʻa a hoʻouna paha i nā hōʻailona ʻoi aku ka maikaʻi. Hōʻike pinepine ʻia ka loaʻa ʻana o ka Antenna i decibels (dB) a ʻo ia kekahi o nā hōʻailona koʻikoʻi no ka loiloi ʻana i ka hana antenna.
A laila, e lawe wau iā ʻoe e hoʻomaopopo i nā kumu kumu o ka loaʻa ʻana o ka antenna a pehea e helu ai i ka loaʻa antenna, etc.
1. Kumu o ka antenna loaa
ʻO ka ʻōlelo aʻoaʻo, ʻo ka loaʻa ʻana o ka antenna ka ratio o ka mana mana hōʻailona i hana ʻia e ka antenna maoli a me ka antenna kumu kumu kūpono ma kahi kūlana ma kahi ākea ma lalo o ka mana hoʻokomo like. Ua ʻōlelo ʻia ka manaʻo o kahi antenna kumu kumu. He aha ia? ʻO ka ʻoiaʻiʻo, he antenna ia i manaʻo ʻia e ka poʻe e hoʻokuʻu i nā hōʻailona like ʻole, a ʻo kāna ʻano hoʻohālikelike hōʻailona he poʻomanaʻo like ʻole. ʻO ka ʻoiaʻiʻo, loaʻa nā antenna i nā kuhikuhi e loaʻa ai ka radiation (ma hope i kapa ʻia ʻo ia he mau papa radiation). E ʻoi aku ka ikaika o ka hōʻailona ma ka ʻili radiation ma mua o ka waiwai radiation o ka antenna kumu kumu manaʻo, ʻoiai ua nāwaliwali ka hōʻailona hōʻailona ma nā ʻaoʻao ʻē aʻe. ʻO ka hoʻohālikelike ma waena o ka waiwai maoli a me ka waiwai theoretical ma aneʻi ka loaʻa o ka antenna.
Hōʻike ke kiʻi i kaRM-SGHA42-10kumu hoʻohālike huahana Loaʻa ka ʻikepili
He mea pono ke hoʻomaopopo ʻia ʻo nā antenna passive i ʻike pinepine ʻia e ka poʻe maʻamau ʻaʻole wale e hoʻonui i ka mana hoʻouna, akā e hoʻopau pū i ka mana hoʻouna. ʻO ke kumu i manaʻo ʻia he loaʻa ka waiwai no ka mea ua mōhai ʻia nā ʻaoʻao ʻē aʻe, ua paʻa ka kuhikuhi radiation, a ua hoʻomaikaʻi ʻia ka helu hoʻohana hōʻailona.
2. Ka helu ʻana i ka loaʻa ʻana o ka antenna
Hōʻike maoli ka loaʻa ʻana o Antenna i ke kiʻekiʻe o ka radiation concentrated o ka mana uila, no laila pili pili ia i ke ʻano o ka radiation antenna. ʻO ka ʻike maʻamau ʻo ka ʻoi aku ka liʻiliʻi o ka lobe nui a me ka liʻiliʻi o ka lobe ʻaoʻao i ke ʻano o ka radiation antenna, ʻoi aku ka kiʻekiʻe o ka loaʻa. No laila pehea e helu ai i ka loaʻa antenna? No ka antenna maʻamau, hiki ke hoʻohana ʻia ke kumu hoʻohālike G (dBi) = 10Lg {32000/(2θ3dB, E × 2θ3dB, H)} e koho i kona loaʻa. formula,
ʻO 2θ3dB, E a me 2θ3dB, H nā laulā kaola o ka antenna ma nā mokulele nui ʻelua; ʻO 32000 ka ʻikepili empirical.
No laila he aha ka manaʻo inā hoʻolako ʻia kahi mea uila uila 100mw me kahi antenna me ka loaʻa o +3dbi? ʻO ka mea mua, e hoʻololi i ka mana transmit i ka hōʻailona loaʻa dbm. ʻO ke ʻano helu helu:
100mw=10lg100=20dbm
A laila e helu i ka nui o ka mana hoʻouna, e like me ka huina o ka mana hoʻouna a me ka loaʻa ʻana o ka antenna. Penei ke ano helu.
20dbm+3dbm=23dbm
ʻO ka hope, helu hou ʻia ka mana hoʻoili like penei:
10^（23/10）(200mw
I nā huaʻōlelo ʻē aʻe, hiki i kahi antenna loaʻa + 3dbi ke pālua i ka mana hoʻoili like.
3. Nā antenna loaʻa maʻamau
ʻO nā antennas o kā mākou mau mea ala uila maʻamau he mau antenna omnidirectional. Aia kona ʻili radiation ma ka mokulele ākea e kū pono ana i ka antenna, kahi i ʻoi aku ka nui o ka loaʻa ʻana o ka radiation, ʻoiai ʻo ka radiation ma luna o luna a ma lalo o ka antenna e nāwaliwali loa. Ua like ia me ka lawe ʻana i ka ʻōpeʻa hōʻailona a palahalaha iki.
ʻO ka loaʻa ʻana o ka Antenna ka "hoʻohālikelike" o ka hōʻailona, a ʻo ka nui o ka loaʻa e hōʻike ana i ka nui o ka hoʻohana ʻana i ka hōʻailona.
Aia kekahi antenna pā maʻamau, ʻo ia ka mea maʻamau he antenna kuhikuhi. Aia kona ʻili radiation ma ka ʻāpana like ʻole i mua o ka pā, a nāwaliwali loa nā hōʻailona ma nā wahi ʻē aʻe. Ua like ia me ka hoʻohui ʻana i kahi uhi kukui i kahi ʻōpuʻu kukui.
I ka pōkole, ʻoi aku ka maikaʻi o nā antenna kiʻekiʻe o ka lōʻihi a me ka maikaʻi o ka hōʻailona ʻoi aku ka maikaʻi, akā pono lākou e mōhai aku i ka radiation ma nā ʻaoʻao pākahi (mau ʻaoʻao pau ʻole). Loaʻa nā antenna haʻahaʻa haʻahaʻa i kahi pae kuhikuhi nui akā he pōkole pōkole. Ke haʻalele nā huahana uila i ka hale hana, hoʻonohonoho maʻamau nā mea hana e like me nā hiʻohiʻona hoʻohana.
Makemake au e paipai i kekahi mau huahana antenna me ka waiwai maikaʻi no kēlā me kēia:
RM-BDHA056-11（0.5-6GHz）
RM-DCPHA105145-20A（10.5-14.5GHz）
RM-SGHA28-10（26.5-40GHz）
Ka manawa hoʻouna: Apr-26-2024
