ʻO ka polarization poepoe lima ʻākau (RHCP) a me ka polarization poepoe lima hema (LHCP)e wehewehe i ke kuhikuhi e wili ai ka vector kahua uila i ka wā e laha ai ka nalu electromagnetic. He mea nui ka ʻike pololei i nā loulou ukali, radar, ana antenna a me nā ʻōnaehana RF ʻē aʻe no ka mea pono e hoʻohana nā antenna hoʻouna a loaʻa i ka polarization kūpono e hoʻokō ai i ka hoʻoili mana kūpono.
Wehewehe kēia alakaʻi i ke kuʻuna nānā ʻana, ka lula lima kūpono, ka pilina kahua-ʻāpana, ka lakio axial a me nā kikoʻī nui e nānā ai i ke koho ʻana i kahi antenna circularly polarized.
Nā Laʻana o ka Antenna Pepeiao Polarized RF MISO
Hāʻawi ʻo RF MISO i nā hiʻohiʻona antenna pepeiaohao polarized circularly no nā hui hana i koho ʻia. Hōʻike nā hiʻohiʻona ma lalo nei i nā koho alapine like ʻole; e hōʻoia mau i ka lima, ka lakio axial, ka loaʻa, ka interface a me ka ʻikepili mechanical i ka ʻikepili kumu hoʻohālike o kēia manawa ma mua o ke koho ʻana.
RM-CPHA82124-20| 8.2–12.4 GHz ʻAntenna pepeiaohao polarized poepoe
RM-CPHA1840-12| Antenna pepeiaohao polarized 18–40 GHz
RM-CPHA218-16| Antenna pepeiaohao polarized pōʻai 2–18 GHz
E ʻimi i ka māhele piha: Nā antenna pepeiaohao polarization pōʻai RF MISO, me RHCP, LHCP a me nā koho polarization pōʻai-lua ma ke kumu hoʻohālike.
He aha ka Polarization Circular?
Hōʻike ka polarization i ke ala i hahai ʻia e ka vector kahua uila ma kahi kiko paʻa i ka lewa. I ka polarization linear, noho ka vector ma kahi laina pololei. I ka polarization pōʻai kūpono, paʻa kona nui ʻoiai ke wili nei ka vector ma o 360 degere i kēlā me kēia pōʻaiapuni RF. Hoʻopuka pinepine nā antennas hana i kahi ala elliptical iki, no laila ua loiloi ʻia ke circularity elakio axial. ʻO ka nalu polarized poepoe kūpono he 0 dB axial ratio; ʻo ka lakio axial i ana ʻia haʻahaʻa e hōʻike ana i ka polarization kokoke aku i kahi pōʻai.
Hiki ke hoʻokumu ʻia ka polarization pōʻai e ʻelua mau ʻāpana kahua linear orthogonal me ka amplitude like a me ka ʻokoʻa pae o ka hoʻohui a i ʻole ka emi ʻana o 90 degere. ʻO ka hōʻailona o kēlā pilina pae quadrature e hoʻoholo ai inā he RHCP a i ʻole LHCP ka nalu ma lalo o ke kuʻuna i ʻōlelo ʻia.
RHCP vs LHCP: E haʻi i ka ʻAha Kūkākūkā Nānā
Hiki ke ʻike ʻia ka lima ʻana ua hoʻohuli ʻia ke nānā ʻia ke kahua wili like mai nā ʻaoʻao ʻē aʻe. I mea e pale aku ai i ka maopopo ʻole, e haʻi mau i ke kuhikuhi nānā. Ma lalo o ke kuʻuna IEEE i hoʻohana pinepine ʻia, ua wehewehe ʻia ka lima ʻana i ka wā e nānā anama ke kuhikuhi o ka laha ʻana o ka nalu, mai ke kumu a i ke kuhikuhi o ka huakaʻi.
ʻO kahi ʻano hana kūpono, ʻo ia ke kuhikuhi ʻana i kou manamana nui i ke kuhikuhi hoʻolaha. Inā hahai ka wili ʻana o ke kahua uila i ka wili ʻana o nā manamana lima ma kou lima ʻākau, ʻo ka nalu ʻo RHCP ma lalo o kēia kuʻuna; inā hahai ia i ka wili hema, ʻo LHCP ia. No ka mea, hoʻohana kekahi mau palapala a me nā aʻo ʻana i kahi kuanaʻike ʻokoʻa, e hōʻoia i ka kuʻuna ma ka pepa ʻikepili antenna a me ke kaʻina hana hoʻāʻo ma mua o ka hoʻohālikelike ʻana i nā hopena.
Nā ʻĀpana Kahua a me ka Pilina Pae
E noʻonoʻo i ʻelua mau ʻāpana nalu mokulele e hele ana ma ke axis z. Hoʻonohonoho ʻia kekahi ʻāpana kahua uila ma ke ʻano o x me ka amplitude Ex; ua kuhikuhi ʻia ka lua ma ke ʻano o y me ka amplitude EyʻO kā lākou huina vector e hoʻoholo i ke kūlana polarization hopena.
Ke loaʻa hoʻokahi wale nō ʻāpana, ua hoʻopili pololei ʻia ka nalu ma kēlā axis. Ke loaʻa nā ʻāpana ʻelua, ʻo ko lākou amplitude a me ka pae e hoʻoholo ai inā he polarization linear, circular a elliptical paha ka hopena.
Hiki ke hōʻuluʻulu ʻia ka pilina kahua penei:
- Inā ʻo Exʻaʻole ʻo ia ka zero a ʻo Eyʻo ka ʻole, ua laina ka polarization ma ke ʻano o x.
- Inā ʻo Eyʻaʻole ʻo ia ka zero a ʻo Exʻo ka ʻole, ua laina ka polarization ma ke ʻano o y.
- Inā aia nā ʻāpana ʻelua i ka pae, e noho laina ko lākou huina vector ma kahi kihi paʻa.
- Inā like ka amplitude o nā ʻāpana a me ka ʻokoʻa pae o ka hoʻohui a i ʻole ka minus 90 degere, ʻo ka hopena he polarization pōʻai kūpono.
Inā ʻaʻole like nā ʻāpana orthogonal, a ʻaʻole pololei ka ʻokoʻa pae i 90 degere, e kahakiʻi ke kahua i kahi ellipse ma mua o kahi pōʻai. ʻO ia ke kumu e kuhikuhi ai kahi pepa ʻikepili antenna i ka lakio axial ma luna o ke alapine (frequency) a, inā pili, ma luna o ka uhi angular i manaʻo ʻia. ʻAʻole wehewehe ka lima wale nō i ka maikaʻi o ka polarization.
No ke aha he mea nui ka hoʻohālikelike ʻana o ka polarization
Hoʻopuka kahi antenna loaʻa i ka mana nui loa i loaʻa ke hoʻohālikelike ʻia kona polarization me ka nalu e hiki mai ana. ʻO nā kūlana polarization pōʻai kūpono ʻē aʻe he orthogonal, no laila hiki i kahi mismatch RHCP/LHCP ke hana i ka pohō polarization nui. Hāʻawi nā antennas maoli i ka hōʻole cross-polarization palena ʻole, a hilinaʻi pū ka hana i ana ʻia i ka ratio axial, alignment, reflections a me ke kaiapuni hoʻāʻo a puni.
Hiki i nā ʻōlinolino mai nā ʻili alakaʻi ke hoʻololi i ke kūlana polarization i ʻike ʻia, a ʻo nā radomes, nā mea paʻa a i ʻole nā hale kokoke e hoʻopilikia i ke kahua. No ka hōʻoia hilinaʻi, e hoʻohālikelike i nā antenna ʻelua ma ka boresight, e hoʻohana i kahi kuhikuhi polarization i ʻike ʻia, e hoʻohālikelike i ka mana i loaʻa no nā hoʻonohonoho RHCP a me LHCP, a e ana i ka lakio axial a me ka hana cross-polarization ma waena o ke kāʻei i koi ʻia.
Pehea e koho ai i kahi Antenna RHCP a i ʻole LHCP
Ma mua o ke koho ʻana i kahi antenna pepeiaohao polarized circular, e wehewehe i ke koi hana piha ma mua o ke koho ʻana ma ke alapine wale nō:
- Pae alapine (frequency):e hōʻoia i ka uhi piha ʻana o ka band, ʻaʻole wale ke alapine waena.
- Ka hoʻokaʻawale ʻana:e kuhikuhi i ka RHCP, LHCP a i ʻole ka polarization pōʻai pālua a me ka kuʻuna lima.
- Laki axial:e nānā i ka palena i koi ʻia ma ke alapine (frequency) a me ka uhi angular.
- Loaʻa a me ka laulā o ke kukui:hoʻohālikelike i ka hoʻolālā kālā, ka uhi ʻana a me nā pono o ke ana ʻana.
- Hoʻohālikelike impedance:e nānā hou i ka VSWR a i ʻole ka hoʻihoʻi ʻana i ka pohō ma luna o ke kāʻei holoʻokoʻa.
- RF interface a me ka mana:e hōʻoia i nā pono hoʻohui a i ʻole ka interface waveguide a me ka lawelawe mana.
- Hoʻohui ʻana o ka mīkini:e hōʻoia i ka envelopp, ka interface hoʻouka, ke kuhikuhi a me nā koi o ke kaiapuni.
E kamaʻilio me kahi loea RF MISO Antenna
He mea hana a mea hoʻolako antenna RF a me microwave ʻo RF MISO. E kaʻana like i kāu laulā alapine (frequency), ka lima i koi ʻia, ka loaʻa ʻana (gain), ka lakio axial, ka interface a me nā palena hoʻonohonoho i hiki i kā mākou hui ke kōkua i ka ʻike ʻana i kahi kumu hoʻohālike maʻamau kūpono a kūkākūkā paha i nā koi noi.
E nānā i nā antenna pepeiaohao polarization poepoe|Kāhea iā RF MISO
Ka manawa hoʻouna: Mei-21-2024
