He kupu whakataki ki te tono oTuku whatu RFRF i runga i te muka
I ngā tekau tau tata nei, kua tere te whanaketanga o te hangarau whakawhitiwhiti kōrero ngaruiti me te hangarau whakawhitiwhiti kōrero whatu. Kua tino ahu whakamua ngā hangarau e rua i roto i ō rāua mara, ā, i arahi hoki ki te tere o te whanaketanga o ngā ratonga whakawhitiwhiti kōrero pūkoro me te tuku raraunga, e kawe mai ana i te whai wāhitanga nui ki te oranga o te tangata. He painga anō ō ngā hangarau e rua, arā, te whakawhitiwhiti kōrero ngaruiti me te whakawhitiwhiti whakaahua-hiko, engari he ngoikoretanga anō hoki kāore e taea te wikitoria. Me whai whatunga ā-tinana te tuku whakaahua-hiko, ā, he ngoikoretanga anō hoki kei roto i te ngāwari, te whatunga tere me te nekenekehanga o te hanganga. He ngoikoretanga anō ō te whakawhitiwhiti kōrero ngaruiti i roto i te tuku tawhiti me te kaha nui, ā, me whakanui pinepine te whakawhiti me te tuku anō i te ngaruiti, ā, he iti noa te whānuitanga o te tuku e te auau kawe. Nā tēnei i arahi ai ki te whakaurunga o te hangarau tuku ngaruiti me te muka whatu, arā, te hangarau Reo Irirangi i runga i te muka (ROF), e kiia pinepinetia ana koRF i runga i te muka, hangarau mamao auau reo irirangi rānei. Ko te mara e whakamahia whānuitia ana o te hangarau RF i runga i te muka ko te mara o te whakawhitiwhiti muka whatu, tae atu ki ngā teihana turanga pūkoro, ngā pūnaha tohatoha, te whānui ahokore, te pouaka whakaata taura, ngā whakawhitiwhiti whatunga tūmataiti me ētahi atu. I ngā tau tata nei, me te pikinga ake o te photonics ngaruiti, kua whakamahia whānuitia te hangarau RF i runga i te muka i roto i te radar photon ngaruiti, te whakawhitiwhiti UAV, te rangahau whetū me ētahi atu mara. E ai ki ngā momo whakarerekētanga taiaho, ka taea te wehewehe i te whakawhitiwhiti taiaho ki te whakarerekētanga ā-roto me te whakarerekētanga ā-waho, ko te mea e whakamahia whānuitia ana ko te whakarerekētanga ā-waho, ā, ko te RF i runga i te muka i runga i te whakarerekētanga taiaho ā-waho e whakaahuatia ana i roto i tēnei pepa. Ko ngā hononga RF i runga i te muka he mea hanga nui mai i te transceiver whatu, te tuku, me teNgā hononga ROF, e whakaaturia ana i te pikitia e whai ake nei:
He kupu whakataki poto ki te wāhanga māmā. He mea whakamahi noa te LDNgā taiaho DFB(momo urupare tohatoha), e whakamahia ana mō ngā tono haruru iti, whānuitanga hihiri teitei, ā, ko ngā taiaho FP (momo Fabry-Perot) e whakamahia ana mō ngā tono iti ake te uaua. Ko ngā roangaru e whakamahia whānuitia ana ko te 1064nm me te 1550nm. Ko te PD hepūoko whakaahua, ā, i tērā pito o te hononga muka whatu, ka kitea te mārama e te PIN photodiode o te kaiwhiwhi, e huri ana i te mārama hei tohu hiko, kātahi ka huri hei taahiraa tukatuka hiko e mōhiotia ana. Ko te muka whatu e whakamahia ana mō te hononga waenga ko te muka whatu aratau-kotahi me te muka whatu aratau-maha. He mea whakamahi noa te muka aratau-kotahi i roto i te whatunga tuarā nā te mea he iti te horapa me te iti o te ngaronga. He tono motuhake te muka maha-aratau i roto i te whatunga rohe nā te mea he iti te utu ki te hanga, ā, ka taea te whakauru i ngā tuku maha i te wā kotahi. He tino iti te whakaiti i te tohu whatu i roto i te muka, ~0.25dB/km noa iho i te 1550nm.
I runga i ngā āhuatanga o te tuku raina me te tuku whatu, kei ngā hononga ROF ēnei painga hangarau e whai ake nei:
• He iti rawa te ngaronga, he iti iho i te 0.4 dB/km te whakaiti o te muka
• Te tuku whānui-rahi muka, te ngaronga muka ahakoa te auau
• Hononga me te kaha kawe tohu/whanuitanga teitei ake tae atu ki te 110GHz • Ātete ki te Whakararuraru Hikohiko (EMI) (kāore te huarere kino e pā ki te tohu)
• He iti ake te utu mō ia mita • He ngāwari ake te muka, he mama ake hoki, tata ki te 1/25 o te arataki ngaru me te 1/10 o te taura coaxial
• He ngāwari, he ngāwari hoki te whakarite o ngā whakarerekētanga hiko-whatu (mō ngā pūnaha whakaahua hauora me ngā pūnaha whakaahua miihini)
Wā tuku: Maehe-11-2025