Ngā Wāhanga Ārai i roto i ngā Porowhita RF
Ngā ātete, ngā pūnga iahiko, ngā pūihi.... Akohia ngā wāhanga kore mahi e whakamahia ana i roto i ngā pūnaha RF.
Kāore he rerekētanga nui o ngā pūnaha RF i ētahi atu momo ara iahiko hiko. Ka pā tonu ngā ture ahupūngao, ā, nō reira, ka kitea anō hoki ngā wāhanga taketake e whakamahia ana i roto i ngā hoahoa RF i roto i ngā ara iahiko matihiko me ngā ara iahiko anarohiko auau-iti.
Heoi anō, he huinga wero me ngā whāinga motuhake kei roto i te hoahoa RF, ā, nō reira, me whai whakaaro motuhake ki ngā āhuatanga me ngā whakamahinga o ngā wāhanga ina mahi ana tātou i roto i te horopaki o te RF. Waihoki, ko ētahi ara iahiko whakauru he mahi tino motuhake ki ngā pūnaha RF—kāore e whakamahia ana i roto i ngā ara iahiko auau-iti, ā, kāore pea i te tino mārama ki te hunga kāore i te tino mōhio ki ngā tikanga hoahoa RF.
He maha ā mātou whakarōpūtanga i ngā wāhanga hei wāhanga hohe, hei wāhanga kore rānei, ā, he rite tonu te tika o tēnei huarahi ki te ao o te RF. Ka kōrerohia ngā wāhanga kore e pā ana ki ngā ara iahiko RF, ā, ka hipokina e te whārangi e whai ake nei ngā wāhanga hohe.
Ngā Pūngao
Ka rite tonu te mahi a te pūnga hiko tino pai mō te tohu 1 Hz me te tohu 1 GHz. Engari kāore ngā wāhanga i te tino pai, ā, ka tino nui ngā āhuatanga kore-tino pai o te pūnga hiko i ngā auau teitei.
Ko te "C" e rite ana ki te pūnga tino pai e tanumia ana i roto i te tini o ngā huānga pirinoa. He ātete mutunga kore kei waenganui i ngā pereti (RD), ātete raupapa (RS), te ine hiko raupapa (LS), me te pūnga whakarara (CP) i waenganui i ngā papa PCB me te papa whenua (kei te whakaaro mātou ko ngā wāhanga e mau ana i te mata; he nui ake ngā kōrero mō tēnei i muri mai).
Ko te mea tino koretake ina mahi ana tātou me ngā tohu auau-tiketike ko te inductance. E tumanakohia ana ka heke tonu te aukati o te capacitor i te pikinga o te auau, engari ko te noho mai o te inductance parasitic ka heke te aukati i te auau whaiaro-orooro, kātahi ka tīmata te piki:
Ngā Ātete, me ētahi atu.
Ahakoa ngā ātete, ka raru pea i ngā auau teitei, nā te mea he inductance raupapa, he capacitance whakarara, me te capacitance noa e pā ana ki ngā papa PCB.
Ā, ka ara ake tēnei i tētahi kōrero nui: ina mahi koe me ngā auau teitei, kei ngā wāhi katoa ngā huānga ara iahiko pirinoa. Ahakoa te māmā, te pai rānei o tētahi huānga ātete, me tākai tonu, me whakapiripiri ki tētahi PCB, ā, ko te mutunga he pirinoa. Pērā anō hoki mō tētahi atu wāhanga: ki te tākaihia, ka whakapiripiri ki te papa, kei reira ngā huānga pirinoa.
Ngā tioata
Ko te uho o te RF ko te whakahaere i ngā tohu auau-tiketike kia tukuna ai ngā mōhiohio, engari i mua i tā tātou whakahaere me whakaputa. Pērā i ētahi atu momo ara iahiko, he huarahi taketake ngā tioata hei whakaputa i tētahi tohutoro auau pumau.
Heoi, i roto i te hoahoa mamati me te hoahoa tohu whakauru, he maha ngā wā karekau e hiahiatia te tika o ngā ara iahiko e ahu mai ana i te tioata, ā, nō reira, he ngāwari te kore aro ki te kōwhiringa tioata. He rerekē, tera pea he whakaritenga auau tino pakari mō te ara iahiko RF, ā, e hiahiatia ana ehara i te mea ko te tika o te auau tuatahi anake engari ko te pumau o te auau.
He tairongo te auau wiri o te tioata noa ki ngā rerekētanga pāmahana. Nā te kore pumau o te auau ka puta he raruraru mō ngā pūnaha RF, inā koa ngā pūnaha ka pāngia e ngā rerekētanga nui o te pāmahana taiao. Nō reira, me whai TCXO pea te pūnaha, arā, he wiri tioata kua whakatauritea te pāmahana. Kei roto i ēnei taputapu he ara iahiko e whakataurite ana i ngā rerekētanga auau o te tioata:
Ngā Antenna
He wāhanga kore mahi te pūihi e whakamahia ana hei huri i te tohu hiko RF ki te irahiko hikohiko (EMR), ki te huri rānei. Mē ngā wāhanga me ngā kaiārahi hiko kē atu, ka ngana mātou ki te whakaiti i ngā pānga o te EMR, ā, mā ngā pūihi ka ngana mātou ki te arotau i te whakaputanga, te whiwhinga rānei o te EMR e ai ki ngā hiahia o te tono.
Ehara i te mea ngāwari te pūtaiao pūihi. He maha ngā āhuatanga e pā ana ki te tukanga whiriwhiri, ki te hoahoa rānei i tētahi pūihi e tino pai ana mō tētahi tono. E rua ngā tuhinga a AAC (pāwhiri ki konei me konei) e whakarato ana i tētahi whakataki pai ki ngā ariā pūihi.
Ka haere tahi ngā auau teitei me ngā wero hoahoa maha, ahakoa ka iti ake te raruraru o te wāhanga pūihi o te pūnaha i te pikinga ake o te auau, nā te mea ka taea e ngā auau teitei te whakamahi i ngā pūihi poto. I ēnei rā he mea noa te whakamahi i te "pūihi maramara," e honohono ana ki tētahi PCB pērā i ngā wāhanga whakairi mata noa, i tētahi pūihi PCB rānei, e hangaia ana mā te whakauru i tētahi tohu motuhake ki roto i te tahora PCB.
Whakarāpopototanga
Ko ētahi wāhanga he mea noa i roto i ngā tono RF anake, ā, ko ētahi me whiriwhiri me te whakatinana kia tino tupato na te mea kāore i te tino pai te whanonga auau-tiketike.
Kāore i te tino pai te urupare auau o ngā wāhanga kore mahi nā te kaha me te ine o te hiko.
Tērā pea ka hiahiatia he tioata tika ake, he pumau ake rānei mō ngā tono RF i ngā tioata e whakamahia whānuitia ana i roto i ngā ara iahiko mamati.
He wāhanga nui ngā pūihi me whiriwhiri kia rite ki ngā āhuatanga me ngā whakaritenga o tētahi pūnaha RF.
He whānuitanga ngā momo o te Si Chuan Keenlion Ngāruiti i roto i ngā whirihoranga whāiti me te whānui, e kapi ana i ngā auau mai i te 0.5 ki te 50 GHz. Kua hangaia hei whakahaere i te mana whakauru mai i te 10 ki te 30 watts i roto i te pūnaha tuku 50-ohm. Ka whakamahia ngā hoahoa moroiti, raina rānei, ā, ka arotauhia mō te mahi pai rawa atu.
Wā tuku: Whiringa-ā-rangi-03-2022
