ʻO ka Antenna kahi ʻano mea maʻamau, hoʻohana nui ʻia i ka lekiō, televise, kamaʻilio lekiō, radar, hoʻokele, hoʻokele uila, ʻike mamao, radio astronomy a me nā kahua ʻē aʻe.ʻO ka antenna kahi mea hiki ke hoʻomālamalama maikaʻi i nā nalu electromagnetic i kahi kuhikuhi kikoʻī i ka lewa a i ʻole e loaʻa i nā hawewe electromagnetic mai kahi kuhikuhi kikoʻī i ka lewa.ʻO kēlā me kēia mea hana e hoʻouna i nā hōʻailona ma o nā hawewe electromagnetic pono e lawe i kahi antenna.
ʻIke mākou i ko mākou ola i kēlā me kēia lā i ka hoʻohuli ʻana a i ʻole ka hoʻolōʻihi ʻana i kahi lekiō a i ʻole ke kīwī antenna, me ka manaʻo a i ʻole ka manaʻo ʻole, hiki ke hoʻopilikia i ka maikaʻi o ka hōʻailona.ʻO ka ʻoiaʻiʻo, hoʻololi ia i nā ʻāpana antenna a pili i ka loaʻa ʻana o nā hawewe electromagnetic.ʻO ka hoʻouna ʻana a me ka loaʻa ʻana o ka hopena o ka antenna pili pili i nā ʻāpana antenna.Eia mākou e hoʻolauna i kekahi mau ʻāpana kumu o ka antenna.
1. Ka hui alapine hana
Ke hana mau nei ka antenna i loko o kekahi mau alapine (band width), e pili ana i nā koi o ka index.ʻO ke alapine e hoʻokō ai i nā koi o ka index ʻo ia ke alapine hana o ka antenna.ʻOkoʻa nā kaha alapine i hoʻohana ʻia e nā mea hoʻohana me nā ʻōnaehana uila like ʻole.No laila, pono e koho ʻia nā antenna me nā alapine kūpono.
2. Loaʻa
ʻO ka loaʻa ʻana o ka Antenna e pili ana i ka ratio o ka mana o ka hōʻailona i hana ʻia e ka antenna maoli a me ka ʻāpana radiation kūpono ma ka wahi like ma ka lewa ma lalo o ke ʻano o ka mana hoʻokomo like.Pili loa ka loaʻa i ke ʻano antenna.ʻO ka liʻiliʻi o ka lobe nui a me ka liʻiliʻi o ka sidelobe, ʻoi aku ka kiʻekiʻe o ka loaʻa.ʻO ka loaʻa ʻana o ka Antenna kahi ana o ka hiki o ka antenna ke hoʻomālamalama i nā hawewe electromagnetic ma kahi kuhikuhi.Pono e hoʻomaopopo ʻia ʻaʻole e hoʻonui ka antenna i ka ikehu o ka hōʻailona radiated, akā hoʻopaʻa wale ia i ka ikehu ma kekahi ʻaoʻao ma o ka hui pū ʻana o nā antenna vibrators a hoʻololi i ke ʻano hānai.
3. Bandwidth
ʻO ka Bandwidth kekahi ʻāpana antenna kumu.Hōʻike ka Bandwidth i ka laulā o nā alapine e hiki ai i kahi antenna ke hoʻomālamalama pololei a loaʻa paha ka ikehu.ʻAʻole hiki ke hoʻohana ʻia nā Antennas me ka bandwidth liʻiliʻi no nā noi broadband.
I ke ola maoli, i mea e hoʻokō ai i nā pono hana like ʻole, ua hana nā ʻenekinia i nā ʻano antennas.ʻO ka mea maʻamau ʻo kēia Antenna lōʻihi, i kapa ʻia ʻo Vertical monopole antenna, a i ʻole GP antenna, i loaʻa i nā mea paʻa lima.
ʻO kēia ka antenna Yagi kaulana, i hana ʻia i nā ʻāpana he nui, a he alakaʻi ikaika, ʻoi aku ka nui o nā alakaʻi, ʻoi aku ka nui o ke kuhikuhi, ʻoi aku ka kiʻekiʻe o ka loaʻa.
ʻIke pinepine mākou i kēia ʻano antenna kīʻaha ma luna o ka hale.He antenna kuhikuhi nui i hoʻohana kūikawā ʻia no ke kamaʻilio lōʻihi.Loaʻa iā ia kahi ākea kaola haiki a me kahi waiwai waiwai kiʻekiʻe, hiki ke kapa ʻia he antenna kuhikuhi kiʻekiʻe.
He nani nā ʻano o nā antenna,
Hiki iā ʻoe ke noʻonoʻo,
ʻAʻole hiki ke hana me ka ʻole o MHZ-TD
Ka manawa hoʻouna: Dec-16-2022
