He Kupu Whakataki ki te Pūnaha RF i runga i te muka

He Kupu Whakataki ki te Pūnaha RF i runga i te muka

RF i runga i te mukaKo tētahi o ngā tono nui o te hangarau whakaahua ngaruiti, ā, e whakaatu ana i ngā painga kore e rite i roto i ngā mara matatau pērā i te radar whakaahua ngaruiti, te reo irirangi whakaahua-rahi, me te whakawhitiwhiti kōrero waka rererangi kore tangata.

Ko te RF i runga i te mukaHononga ROFhe mea hanga te nuinga o ngā tuku whatu, ngā kaiwhiwhi whatu me ngā taura whatu. E whakaaturia ana i te Pikitia 1.

Ngā tuku whatu: Ngā taiaho urupare tohatoha (Reera DFB) e whakamahia ana i roto i ngā tono haruru iti me ngā awhe hihiri teitei, ko ngā taiaho FP ia e whakamahia ana i roto i ngā tono he iti ake ngā whakaritenga. Ko ngā roangaru o ēnei taiaho he 1310nm, 1550nm rānei.

Kaiwhiwhi whatu: I tetahi pito o te hononga muka whatu, ka kitea te mārama e te photodiode PIN o te kaiwhiwhi, ka hurihia te mārama hei iahiko.

Ngā taura whatu: He rerekē ki ngā muka maha-aratau, ka whakamahia ngā muka aratau-kotahi i roto i ngā hononga raina nā te iti o te horapa me te iti o te ngaronga. I te roanga ngaru o te 1310nm, ko te whakaiti o te tohu whatu i roto i te muka whatu he iti iho i te 0.4dB/km. I te 1550nm, he iti iho i te 0.25dB/km.

He pūnaha tuku raina te hononga ROF. I runga i ngā āhuatanga o te tuku raina me te tuku whatu, kei te hononga ROF ēnei painga hangarau e whai ake nei:

• Tino iti te ngaronga, me te ngoikore o te muka i raro i te 0.4 dB/km

• Te tuku whānui-rahi o te muka whatu, kāore te ngaronga o te muka whatu e pā ki te auau

He nui ake te kaha/te whānui o te hononga, tae atu ki te DC ki te 40GHz

• Te aukati i te whakararuraru hikohiko (EMI) (Kāore he pānga tohu i te rangi kino)

• He iti ake te utu mō ia mita • He ngāwari ake, he mama ake hoki ngā muka whatu, tata ki te 1/25 o ngā arataki ngaru me te 1/10 o ngā taura coaxial

• He tahora watea, he ngāwari hoki (mō ngā pūnaha whakaahua hauora me ngā pūnaha whakaahua miihini)

E ai ki te hanganga o te tuku whatu, ka wehea te pūnaha RF i runga i te muka kia rua ngā momo: te whakarerekētanga tika me te whakarerekētanga o waho. Ko te tuku whatu o te pūnaha RF i runga i te muka whakarerekētanga tika e whakamahi ana i te taiaho DFB whakarerekētanga tika, he iti te utu, he iti te rahi me te ngāwari o te whakauru, ā, kua whānuitia te whakamahinga. Heoi, nā te maramara taiaho DFB whakarerekētanga tika, ka taea anake te whakamahi i te RF i runga i te muka whakarerekētanga tika i roto i te roopu auau i raro i te 20GHz. Ki te whakataurite ki te whakarerekētanga tika, ko te tuku RF i runga i te muka whakarerekētanga o waho he mea tito mai i te taiaho DFB auau-kotahi me te whakarerekētanga hiko-whatu. Nā te pakari o te hangarau whakarerekētanga hiko-whatu, ka taea e te pūnaha RF i runga i te muka whakarerekētanga o waho te whakatutuki i ngā tono i roto i te roopu auau neke atu i te 40GHz. Heoi, nā te tāpiri o tekaiwhakarerekē hiko-whatu, he uaua ake te pūnaha, ā, kāore e pai mō te tono. Ko te whakanui hononga ROF, te tatauranga haruru me te whānuitanga hihiri he tawhā nui o ngā hononga ROF, ā, he hononga tata kei waenganui i ngā mea e toru. Hei tauira, ko te tatauranga haruru iti te tikanga he whānuitanga hihiri nui, engari ko te whakanui teitei ehara i te mea e hiahiatia ana e ia pūnaha anake, engari he nui ake te pānga ki ētahi atu āhuatanga mahi o te pūnaha.