He aha te Pūihi Dipole Ngaru-Katoa?
He pūihi pūihi pūrua-ngaru-katoa he pūihi pūrua-ngaru rārangi, ko te roa katoa o te arataki he rite tonu ki te kotahi te roangaru i te auau whakahaere. Arā, ki te mea ko te roangaru e tohuhia ana e λ, ko te roa katoa o te pūrua he tata ki te λ.
Ki te whakatauritea ki te haurua-ngaru rua, he uaua ake te tohatoha o te iahiko me te ngaohiko o te haurua-ngaru rua i te taha o te ara iahiko. Ka pā tika tēnei rerekētanga ki tōna aukati tāuru, ki te tauira irahiko, me te mahi mahi.
Te Tohatoha o te Au me te Ngaohiko
Hei pūwero ngaru-katoa, ka taea te kī ko te kaiārahi he wāhanga haurua-roa-ngaru e rua e honoa ana tetahi ki tetahi. I te taha o te pūihi, ka huri te āhua o te tohatoha o te iahiko, ko te tikanga ka taea e ngā wāhanga rerekē o te kaiārahi te kawe i ngā iahiko ki ngā ahunga rerekē i te wā kotahi.
Nā tēnei whanaungatanga ā-wāhanga, ka taea e ngā mara hikohiko e tukuna ana e ngā wāhanga rerekē o te pūihi te whakakaha tetahi i tetahi i ētahi ahunga, me te whakakore i tetahi i tetahi i ētahi atu ahunga. Koinei tētahi o ngā take matua he rerekē te whanonga hihi o te dipole ngaru-katoa i te dipole haurua-ngaru.
Ngā Āhuatanga Irahiko o te Dipole Ngaru-Katoa
Kāore te porotēhi ngaru-katoa e whakaputa noa i te tauira irahiko rite tonu ki te porotēhi haurua-ngaru. I roto i te porotēhi haurua-ngaru, ko te irahiko te mea tino kaha i te taha whānui. Heoi, mō te porotēhi ngaru-katoa, ka taea e te whakakorenga ā-wāhanga te whakaiti i te irahiko i ētahi ahunga, ā, ka wehea te tauira irahiko kia maha ngā porotēhi.
Ko te tikanga o tēnei, ka taea e te pūngao hikohiko te tuku i te pūngao hikohiko i roto i te dipole ngaru-katoa, engari ko tōna tauira tuku he iti ake te māmā, ā, he iti ake te watea mō ngā tono maha o te pūihi. Hei tāpiri, ko te aukati ira whāngai o te dipole ngaru-katoa whāngai-pokapū ka teitei pea, ka uaua ake te taurite i te aukati.
He aha i kore ai e whakamahia whānuitia ngā Dipoles Ngaru-Katoa
Ahakoa he pai te pūrua ngaru-katoa mō te mārama ki te tohatoha o te iahiko pūihi me te whanonga irahiko, kāore i te whakamahia whānuitia hei pūihi mahi paerewa. He maha ngā take mō tēnei.
Tuatahi, he uaua ake tōna tauira irahiko i tērā o te haurua-ngaru. Mō ngā tono e hiahia ana ki tētahi tauira irahiko e taea te matapae me te ngāwari, he māmā ake te hoahoa me te whakamahi i te haurua-ngaru.
Tuarua, tera pea he uaua ki te whakataurite i te aukati whakauru o te dipole ngaru-katoa ki ngā raina tuku noa. Ka taea e te kore e taurite te aukati te arahi ki te whakanui ake i te whakaata, te whakaheke i te whakawhiti hiko, me te whakaheke i te pai o te pūnaha.
Tuatoru, tera pea ka memeha haere te hihi mai i ngā wāhanga rerekē o te pūihi i ētahi ahunga. Nā tēnei ka kore e pai te pūihi ina hiahiatia he ahunga hihi matua kaha, pumau hoki.
Te Hiranga o te Hangarau
Mai i te tirohanga hangarau, he mea nui ake te pūihi ngaru-katoa hei tauira ariā i te mea he pūihi mahi e whakamahia whānuitia ana. Ka āwhina i ngā kaihangarau ki te mārama ki te pānga o te roa o te pūihi, te āhua o te iahiko, te tūnga whāngai, me te tohatoha o te mara hikohiko ki te mahi irahiko.
I roto i ngā pūnaha RF me ngā pūnaha ngaruiti tūturu, ko te kōwhiringa pūihi e whakawhirinaki ana ki te whānuitanga auau e hiahiatia ana, te whakanui, te pōraritanga, te taurite ārai, te tauira irahiko, me ngā āhuatanga tāutanga. Mō ngā tono ine auau teitei me te whakawhitiwhiti kōrero, he pai ake ngā pūihi haona, ngā pūihi arataki ngaru, me ētahi atu hanganga pūihi motuhake nā te mea he pai ake te pumau me te whakahaere i te mahi.
Whakamutunga
Ko te pūihi ngaru-katoa he pūihi ngaru-katoa me te roa o te arataki whānui tata ki te kotahi te roangaru. Nā te hurihanga ā-wāhanga o te iahiko i te arataki, he uaua ake tana whanonga irahiko i tērā o te ngaru-haurua. Ahakoa ka taea e ia te tuku i te kaha hikohiko, ko tana tauira irahiko me ōna āhuatanga aukati ka iti ake te whakamahinga i roto i ngā pūnaha arataki mahi.
He mea nui tonu te mārama ki te dipole ngaru-katoa mō te ariā pūihi, nā te mea e whakaatu ana i te pānga o te roangaru, te tohatoha o te iahiko, me te whanaungatanga ā-wāhanga ki te irahiko pūihi. He mea whai hua tēnei mōhiotanga mō ngā kaihanga RF, ngā kaihoahoa pūihi, me ngā kaiwhakawhanake pūnaha ngaruiti i te wā e tātari ana i ngā hanganga pūihi matatau ake.
Mō ētahi atu kōrero mō ngā antenna, tirohia:
Wā tuku: Pipiri-18-2026
