He aha te Arotahitanga o te Pūihi?
Whakautu tere:Ko te aronga pūihi e whakaahua ana i te kaha o te pūihi ki te whakaemi i te mana i tukuna ki tētahi ahunga motuhake ki te whakataurite ki tētahi pūihi isotropic tino pai. Ko te aronga o tētahi pūihi isotropic he 1, 0 dBi rānei.
Ko te aronga teitei ake ka hua ake he tauira hihi whaiti ake, he arotahi ake, ko te aronga iti ake ka hua ake he whānuitanga koki. Ko te aronga e whakawhirinaki ana ki te āhua o te tauira hihi, ā, kāore e uru ki ngā ngaronga pūihi.
Ka taea te whakaatu i te tauira irahiko kua whakaōritea i roto i ngā taunga porowhita penei:
Tauira Irahiko Kua Whakaōritea
Tātai Arotahi o te Pūihi
He rite te āhua o te tauira irahiko kua whakatauritea ki te tauira taketake, engari ko tōna uara mōrahi ka tauinehia ki te 1. Ko te aronga o te pūihi, ka tuhia peneiD, e whakarite ana i te kaha mōrahi o te hihi me te kaha toharite o te hihi puta noa i ngā taha katoa.
Ko te tauwehenga o te whārite e tohu ana i te tauira katoa kua whakauruhia ki runga i tētahi porowhita. Mā te wehewehe i te uara tihi ki tēnei toharite ā-wāhi e whakaatu te kaha o te pūihi ki te kukū i te pūngao ki tōna ahunga matua.
Te Ārahitanga me te Whiwhinga
Ko te aronga tika e whakaahua ana i te āhua o te kukū o te tauira irahiko. Ko te whakanui pūihi hoki e whakaatu ana i te whai huatanga o te irahiko, tae atu ki ngā mate arataki me ngā mate dielectric.
Ko te whanaungatangaG = ηD, kei heaGhe taonga,ηko te whai huatanga o te irahiko, meDko te aronga. He rite te whiwhinga o te pūihi kore-ngaro ki tōna aronga; i roto i te pūihi tūturu, he iti ake te whiwhinga. Ko ngā uara e rua e whakaatuhia ana i roto i te dBi ina tohua ki tētahi pūwhakamahana isotropic.
Tauira Tātaitanga Aronga
Hei tauira, whakaarohia ngā whārite e rua e whai ake nei mō te tauira irahiko o ngā pūihi e rua.
Pūihi 1
Pūihi 2
Tauira me te Arotahitanga o te Irahiko
Ka rerekē ngā tauira e whai ake nei i runga i te koki porowhitaθā, e whakaarohia ana ka noho pūmau tonu me te azimuth. Ka horahia whānuitia e te Antenna 1 ōna irahiko, ko te Antenna 2 ia ka kukū ake te kaha ki tōna ahunga matua.
Nā te mea he whaiti ake te kukū o te mana irahiko e tohuhia ana e te hihi matua, e tika ana kia teitei ake te aronga o te Antenna 2.
Pikitia 1. Te whakataurite i ngā tauira irahiko kua whakatauritea. He nui ake te aronga o te tauira kua kukū ake.
Ngā Hua Tātaitanga Ārahitanga
Mā te whakamahi i te whārite aronga ki ngā tauira tauira e rua ka puta:
- Pūihi 1:D = 1.273, 1.05 dBi rānei
- Pūihi 2:D = 2.707, 4.32 dBi rānei
He nui ake te aronga o te pūihi 2 nā te mea he nui ake te kukū o tōna irahiko i te taha o te tihi. Ka whakamahia he pūwhakamahana isotropic hei tohutoro 0 dBi ahakoa he tauira pai rawa atu, kaua ki te pūihi tūturu ka taea te whakatutuki.
Ngā Taupānga Aronga Teitei me te Iti
Ngā pūihi aronga-itihe whānui te kapinga o ngā tohu, ā, he whai hua hoki ina tae mai ngā tohu mai i ngā ahunga rerekē, pērā i ngā taputapu pūkoro, ngā reo irirangi waka, me te urunga ahokore whānui.
Ngā pūihi aronga-teiteiarotahi te pūngao ki tētahi hihi whaiti. He pai ake ēnei mō ngā hononga amiorangi, radar, pūoko mamao, me te whakawhitiwhiti kōrero ā-ira ki te āira ina mōhiotia te ahunga e hiahiatia ana.
E whakaatu ana te ripanga i raro nei i ngā awhe aronga mō ētahi momo pūihi noa.
Ngā Uara Aronga Antenna Noa
| Momo pūihi | Te ōwehenga aronga tata | Te ahunga tata (dBi) |
|---|---|---|
| Te rua poto | 1.5 | 1.76 |
| Te haurua-ngaru | 1.64 | 2.15 |
| Pūihi papaki | 3.2-6.3 | 5-8 |
| Pūnaha haona | 10-100 | 10-20 |
| Pūihi rihi | 10-10,000 | 10-40 |
He awhe tohu ēnei uara. Ko te aronga tuturu e whakawhirinaki ana ki te auau, te rahi hiko, te āhuahanga, te whakamārama, me ngā āhuatanga whakahaere.
Me pēhea te ine i te ahunga o te pūihi?
Ko te aronga hāngai ka whakatauhia i te nuinga o te wā mai i tētahi tauira irahiko kua inehia. Ko te pūihi kei raro i te whakamātautau ka whakaahuatia i runga i te azimuth me te teitei, ā, ko te mara hua, ko ngā raraunga mana rānei ka whakatauritea hei hanga i tētahi tauira toru-ahu.
- Inehia te taumata irahiko whanaunga ki runga ake i te awhe koki e hiahiatia ana.
- Tāutuhia te kaha mōrahi o te irahiko.
- Whakauruhia te tauira irahiko ki runga i te koki totoka hei whiwhi i te toharite ā-wāhi.
- Wehea te kaha o te tihi ki te kaha toharite, ka whakaaturia te hua hei ōwehenga, hei dBi rānei.
Whakahaeretiawhakamātautau pūihiKa āwhina i te whakaiti i ngā whakaata me te koretake o te ine i te wā e aromatawai ana i ngā tauira irahiko, te whakanui, te pōraritanga, me te aronga tika.
Te Pānga o te Rahi o te Pūihi ki te Aronga
He kaha te awe o te rahi hiko ki te tauira irahiko. Ko te tikanga, ka puta he hihi whānui me te ahunga iti i roto i te pūihi iti-kotahi. Mā te whakanui ake i te kōhao whai hua o ngā roangaru ka taea e te pūihi, te rarangi rānei te hanga i tētahi hihi whaiti ake, ā, ka eke ki te ahunga teitei ake.
- Te ahunga iti iho:he mea whai hua mō te kapinga whānui me ngā tohu e tae mai ana i ngā taha maha.
- Te aronga teitei ake:he whai hua mō ngā hononga arotahi, te whiriwhiri koki pai ake, me te whakakorenga o ngā tohu i waho o te hihi matua.
Kāore te aronga e whakatauhia ana e te rahi ā-tinana anake. Ko te āhuahanga, te tohatoha o te iahiko, te mokowā me te wehewehenga o ngā rarangi, te whakamārama o te pūaha, me te auau whakahaere katoa ka pā ki te tauira irahiko whakamutunga.
Ko te kurupae whaiti ake e rite ana ki te ahunga teitei ake, engari me tika ake te tohu me te whakatikatika. Mō te whanaungatanga i waenga i te ahunga, te whai huatanga, me te mahi kua tutuki, tirohiate whai huatanga me te whakanui i te pūihi.
Ngā Pātai Auau
He aha te aronga o te pūihi i ngā kupu māmā noa iho?
He mehua tēnei mō te kaha o te kukū o te hihi i te taha kotahi e te pūihi, ki te whakataurite ki te kaha o te kukū o te hihi puta noa i ngā taha katoa.
He rite tonu te aronga o te pūihi ki te whakanui?
Kāo. Ko te aronga e whakaatu ana i te kukū tauira, ko te whakanui hoki kei roto ko te whai huatanga o te irahiko. Ko tō rāua whanaungatanga ko G = ηD.
He aha te tikanga o te aronga 0 dBi?
E rite ana ki tētahi pūwhakamahana isotropic tino pai me te ōwehenga aronga o te 1. Koinei te tohutoro e whakamahia ana hei whakaatu i te aronga i roto i te dBi.
Me pēhea te whakanui ake i te aronga o te pūihi?
Ka taea te whakanui ake i te aronga mā te whakanui ake i te kōhao hiko whai hua, te whakamahi i ngā whakaata, i ngā karāhe arotahi rānei, te hanga rarangi me te kaha me te āhua e whakahaeretia ana, te tīpako rānei i tētahi āhuahanga e whakaputa ana i tētahi hihi matua whaiti ake.
He pai ake te tikanga o te ahunga teitei ake hei pūihi pai ake?
Kāo. He pai te ahunga teitei ake ina mōhiotia te ahunga ūnga, engari he mea nui ake te whānuitanga o te kapinga mō ngā tono pūkoro, maha-ahu rānei. Ko te kōwhiringa tika e whakawhirinaki ana ki te hononga, te kapinga, te whānui o te whānui, te whai huatanga, me ngā whakaritenga tāutanga.
Hei āwhina i te whiriwhiri, i te whakamātautau rānei i tētahi pūihi mō tō tono,whakapā atu ki a RF MISOīmēra rāneiinfo@rf-miso.com.
Wā tuku: Whiringa-ā-rangi-07-2023
