HePūihi Porowhitahe tauira noa iho tēnei o te pūihi waea, e tohuhia ana e tōna hanganga porowhita. He pūihi whānui e tika ana mō ngā roopu VHF me UHF.
Ka mahi te pūihi porowhita i runga i te awhe auau o te 30 MHz ki te 3 GHz, e kapi ana i ngā roopu VHF me te UHF.
Ngā Mātāpono Hanga me te Mahi o te Pūihi Porowhita
Ka hangaia he Pūihi Porowhita mā te takai i tētahi ara iahiko kia rite ki te porowhita, ka hono atu ki tētahi papa whenua mā te raina whāngai. He māmā noa te hanganga, ka puta noa mai ngā ngaru porowhita porowhita, ā, he whānuitia te whakamahinga i roto i ngā whakawhitiwhiti kōrero ki tua atu i te whenua pērā i ngā pūnaha tuku amiorangi.
E whakaatu ana te pikitia i runga ake nei i tētahi pūnaha Pūihi Porowhita e whakamahia ana mō ngā whakawhitiwhiti kōrero amiorangi. He nui te wāhi tāutanga o waho e hiahiatia ana mō ēnei pūihi.
Ko te Pūihi Porowhita he mea hanga ki te waea parahi matotoru, ki te ngongo rānei, he mea hanga hei porowhita, e mahi tahi ana me te papa whenua whakarewa papatahi. Ka honoa tetahi pito o te porowhita ki te ara iahiko waenga o te taura coaxial, ko te ara iahiko o waho ka honoa ki te papa whenua.
E whakaatu ana te ahua i runga ake nei i te hanganga o te Pūihi Porowhita, me te tirohanga taipitopito o ōna wāhanga.
Ko ngā āhuatanga irahiko o te Pūihi Porowhita e whakatauhia ana e te whānui o te porowhita, te tawhiti i waenga i ngā hurihanga (pitch), me te koki pitch.
Ko te koki piko e tautuhia ana ko te koki i waenganui i te pātata ki te helix me te papa tūhono ki te tuaka helix, ā, e homai ana e:
Kei hea:
•Ko D te whānui o te porowhita
•Ko S te pikinga (te mokowā waenga-ki-waenga i waenga i ngā hurihanga tata)
•ko α te koki o te papa
Aratau Whakahaere
E rua ngā momo matua e mahi ai ngā Antenna Porowhita:
•Aratau Noa (e mōhiotia ana ko te aratau irahiko poutū)
•Aratau Axial (e mōhiotia ana ko te aratau mutunga-ahi, ko te aratau hihi hihi rānei)
Ka whakamāramahia ia aratau i raro nei.
I te aratau irahiko noa, he poutū te mara irahiko ki te tuaka helix, ā, he porowhita te porowhita o te ngaru irahiko. Ka tutuki tēnei aratau ina he iti ngā rahinga helix e pā ana ki te roanga ngaru. I tēnei wā, ka taea te whakaaro ko ngā āhuatanga irahiko o te pūihi helical he huinga o te pūihi poto-rua me te pūihi porowhita.
E whakaatu ana te pikitia i runga ake nei i te tauira irahiko o te Pūihi Porowhita e mahi ana i te aratau noa.
Ka whakatauhia tēnei aratau e te whānui o te porowhita D me te mokowā i waenga i ngā hurihanga S. Ko ngā ngoikoretanga o tēnei aratau whakahaere ko te iti o te whai huatanga o te irahiko me te whaiti o te whānui o te whānui; nō reira, he onge te whakamahinga i roto i ngā mahi whaihua.
Aratau Tuaka
I roto i te aratau irahiko tuaka, ka whakaatuhia e te mara irahiko ngā āhuatanga mutunga-ahi i te tuaka helix, ā, he porowhita, he tata porowhita rānei te porowhita o te ngaru irahiko. Ka tutuki tēnei aratau ina whakanuia te porowhita helix ki te ota o te kotahi roangaru (λ) ā, ko te mokowā i waenga i ngā hurihanga he tata ki te λ/4. I raro i ēnei āhuatanga, he whānui te tauira irahiko i te tuaka me ngā āhuatanga ahunga, ā, ka puta ngā taha taha i ngā koki e wehea ana mai i te tuaka.
E whakaatu ana te pikitia i runga ake nei i te tauira irahiko o te Pūihi Porowhita e mahi ana i te aratau tuaka.
Ina hangaia te pūihi mō ngā ngaru porowhita matau (RHCP), e kore e whiwhi i ngā ngaru porowhita maui (LHCP), me te ritenga kē. He ngāwari te whakatinana i tēnei aratau whakahaere, ā, he nui ake te whakamahinga i roto i ngā mahi whaihua.
Ko ngā painga matua o te Antenna Porowhita koia ēnei:
•He hanganga māmā, he ngāwari hoki te hoahoa
•Te aronga teitei
•Whānui whānui
•Ka taea te porowhita porowhita
•He pai mō ngā roopu HF me VHF
Ko ngā whakamahinga matua o te Pūihi Porowhita koia ēnei:
•Ka whakamahia ngā pūihi porowhita kotahi, ngā antenna rānei, mō te tuku me te whiwhi tohu VHF
•E whakamahia whānuitia ana i roto i ngā pūnaha whakawhitiwhiti kōrero amiorangi me ngā pūnaha tirotiro ātea hōhonu
•Whakamahia i roto i ngā hononga telemetry i waenga i ngā pere ballistic, ngā amiorangi, me ngā teihana whenua
•Whakamahia hei whakatū hononga i waenganui i te Marama me te Ao
•He mea nui anō hoki i roto i ngā tono whetū irirangi
RFMisoPūihi Porowhita — tō otinga pono mō te porowhita porowhita whānui.
RM-PSA0756-3L
RM-PSA0756-3R
RM-PSA1840-5
RM-PSA218-2R
RM-PSA218-V2
Mō ētahi atu kōrero mō ngā antenna, tirohia:
Wā tuku: Maehe-26-2026
