Loaʻa kiʻekiʻe L-Band Directional Spiral Antenna / Helical Antenna

ʻO kahi antenna helical / Spiral antenna kahi ʻano antenna kūikawā hiki ke hoʻouna a loaʻa i nā hōʻailona electromagnetic polarized e huli ana i ka lewa. Hoʻohana pinepine ʻia kēia ʻano antenna i nā kahua kahua no nā kamaʻilio satellite a ua haku ʻia me nā spiral metala me nā waiwai conductive maikaʻi. Hoʻohana pinepine ʻia ia ma o ke kaula coaxial, kahi i hoʻopili ʻia ai ke kaula kumu o ke kaula coaxial i kekahi ʻaoʻao o ka uea spiral a hoʻopili ʻia ka mea hoʻokele o waho i kahi mesh a i ʻole ka pā. ʻO nā hiʻohiʻona radiation o kahi antenna spiral e pili kokoke ana i ke anapuni o kona spiral: inā ʻoi aku ka liʻiliʻi o ke anapuni ma mua o ka lōʻihi o ka nalu, ʻo ke kuhikuhi nui o ka radiation e kū pono ana i ke axis spiral; i ka wā e kokoke ana ka pōʻai i ka lōʻihi nalu, ʻike ʻia ka pāhawewe ikaika loa ma ke ala o ke koʻi spiral.

Helical antennas/Spiral antennas i kēia mau hiʻohiʻona koʻikoʻi:

1. Hoʻopili nui ʻia ka radiation ma ke kuhikuhi axis o ka antenna.
2. Hiki iā ia ke hoʻohua i nā nalu polarized circularly, e kūʻē pono i nā hopena multipath a me ka hoʻopili hōʻailona.
3. Hōʻike ka hāʻawi ʻana i kēia manawa ma ka antenna i kahi ʻano nalu hele, e kōkua ana i ka loaʻa ʻana o ka hopena radiation like.
4. ʻO ka impedance hoʻokomo kokoke i ke kūpaʻa maʻemaʻe, e hoʻomaʻamaʻa i ka hoʻolālā o ka pūnaewele pili a hoʻomaikaʻi i ka pono.
5. Loaʻa iā ia nā hiʻohiʻona broadband a hiki ke mālama i ka hana radiation kūpono i loko o kahi ākea ākea.

Ma muli o kā lākou impedance hiʻohiʻona paʻa, maikaʻi circular polarization hana, a me ka maikaʻi o ka hopena-ahi a me ka ʻaoʻao-ahi ʻaoʻao, ua hoʻohana nui ʻia nā antenna helical i nā kula he nui e like me ka aerospace, meteorology, positioning, and relay communications. Me ka hoʻomau mau ʻana o ka ʻenehana kamaʻilio kelepona, ʻoi aku ka maikaʻi o ka hana uila o nā antenna helical e hāʻawi iā lākou i ka noi ākea a me ka hoʻomohala ʻana i ka wā e hiki mai ana.