2. Te Whakamahinga o te MTM-TL i roto i ngā Pūnaha Pūihi
Ka arotahi tēnei wāhanga ki ngā TL metamaterial horihori me ētahi o ā rātou tono tino noa me te whai tikanga mō te whakatinana i ngā hanganga pūihi rerekē me te utu iti, te ngāwari o te hanga, te whakaitiiti, te whānui o te whānui, te kaha me te whai hua teitei, te kaha matawai whānui me te kōtaha iti. Ka matapakihia ēnei i raro nei.
1. Ngā pūihi whānui me ngā pūihi maha-auau
I roto i tētahi TL noa me te roa o te l, ina hoatu te auau koki ω0, ka taea te tatau i te roa hiko (te wāhanga rānei) o te raina tuku penei:
Ko te vp te tohu i te tere ā-wāhanga o te raina tuku. E kitea ana i runga ake nei, he rite tonu te whānui o te whānuitanga ki te whakaroa rōpū, koinei te pānga o φ e pā ana ki te auau. Nō reira, i te poto haere o te roa o te raina tuku, ka whānui haere hoki te whānui o te whānuitanga. Arā, he whanaungatanga whakahurihuri i waenga i te whānui me te ā-wāhanga taketake o te raina tuku, he mea hoahoa motuhake. E whakaatu ana tēnei i roto i ngā ara iahiko tohatoha tuku iho, he uaua ki te whakahaere i te whānui o te whakahaere. Ka taea tēnei te kī ko ngā herenga o ngā raina tuku tuku iho e pā ana ki ngā nekehanga herekore. Heoi, mā ngā huānga uta ka taea te whakamahi i ētahi atu tawhā i roto i ngā TL metamaterial, ā, ka taea te whakahaere i te urupare ā-wāhanga ki tētahi whānuitanga. Hei whakanui ake i te whānui, me whai i tētahi pari rite tata ki te auau whakahaere o ngā āhuatanga marara. Ka taea e te TL metamaterial horihori te whakatutuki i tēnei whāinga. I runga i tēnei huarahi, he maha ngā tikanga mō te whakarei ake i te whānui o ngā pūihi kua whakaarohia i roto i te pepa. Kua hoahoatia, kua hangaia hoki e ngā tohunga ētahi pūihi whānui e rua kua utaina ki ngā resonators mowhiti wehewehe (tirohia te Pikitia 7). Ko ngā hua e whakaaturia ana i te Pikitia 7 e whakaatu ana i muri i te utaina o te pūwero mowhiti wehewehe ki te pūihi monopole tikanga, ka whakaohohia he aratau auau resonant iti. Ka arotauhia te rahi o te pūwero mowhiti wehewehe kia tutuki ai he resonance tata ki te pūihi monopole. E whakaatu ana ngā hua ina ōrite ngā resonance e rua, ka piki ake te whānui me ngā āhuatanga irahiko o te pūihi. Ko te roa me te whānui o te pūihi monopole he 0.25λ0×0.11λ0 me te 0.25λ0×0.21λ0 (4GHz), ia, ā, ko te roa me te whānui o te pūihi monopole kua utaina ki te pūwero mowhiti wehewehe he 0.29λ0×0.21λ0 (2.9GHz), ia. Mō te pūihi āhua-F tikanga me te pūihi āhua-T kāore he pūwero mowhiti wehewehe, ko te whakanui me te whai huatanga irahiko teitei rawa atu i inehia i te roopu 5GHz ko 3.6dBi - 78.5% me 3.9dBi - 80.2%, ia. Mō te pūihi kua utaina ki te resonator mowhiti wehewehe, ko ēnei tawhā ko 4dBi - 81.2% me 4.4dBi - 83%, ia, i roto i te roopu 6GHz. Mā te whakamahi i te resonator mowhiti wehewehe hei kawenga ōrite i runga i te pūihi monopole, ka taea te tautoko i ngā roopu 2.9GHz ~ 6.41GHz me 2.6GHz ~ 6.6GHz, e rite ana ki ngā whānuitanga haurua o te 75.4% me te ~87%, ia. E whakaatu ana ēnei hua kua pai ake te whānuitanga ine mā te 2.4 ngā wā me te 2.11 ngā wā ki te whakataurite ki ngā pūihi monopole tuku iho he rahi pumau.
Pikitia 7. E rua ngā pūihi whānui kua utaina ki ngā whakapūoro mowhiti-wehe.
E whakaaturia ana i te Pikitia 8, e whakaaturia ana ngā hua whakamātautau o te pūihi monopole kua tāia kiato. Ina S11≤- 10 dB, ko te whānui o te mahi he 185% (0.115-2.90 GHz), ā, i te 1.45 GHz, ko te pikinga teitei me te whai huatanga irahiko he 2.35 dBi me te 78.8%, ia. He rite te whakatakotoranga o te pūihi ki te hanganga rau tapatoru whakamuri-ki-muri, e whāngaihia ana e te wehewehe mana piko. Kei roto i te GND kua tapahia he porowhita pokapū kei raro i te whāngai, ā, e whā ngā mowhiti oro tuwhera e horahia ana huri noa, e whānui ake ai te whānui o te irahiko o te pūihi. Ka tata te irahiko o te pūihi ki ngā taha katoa, e kapi ana i te nuinga o ngā roopu VHF me S, me ngā roopu UHF me L katoa. Ko te rahi ā-tinana o te pūihi he 48.32×43.72×0.8 mm3, ā, ko te rahi hiko he 0.235λ0×0.211λ0×0.003λ0. He painga tōna ko te iti o te rahi me te iti o te utu, ā, he maha pea ōna tono mō ngā pūnaha whakawhitiwhiti kōrero ahokore whānui.
Pikitia 8: Pūihi monopole kua utaina ki te resonator mowhiti wehewehe.
E whakaatu ana te Pikitia 9 i tētahi hanganga pūihi papatahi e rua ngā takirua waea piko e hono ana, e tūhono ana ki tētahi papa whenua āhua-T kua tapahia mā roto i ngā vias e rua. Ko te rahi o te pūihi he 38.5×36.6 mm2 (0.070λ0×0.067λ0), ko λ0 te roangaru wāhi kore utu o te 0.55 GHz. Ka whiti te pūihi i ngā taha katoa i roto i te papa-E i roto i te roopu auau whakahaere o te 0.55 ~ 3.85 GHz, me te whakanui mōrahi o te 5.5dBi i te 2.35GHz me te whai huatanga o te 90.1%. Mā ēnei āhuatanga ka pai te pūihi kua whakaarohia mō ngā tono maha, tae atu ki te UHF RFID, GSM 900, GPS, KPCS, DCS, IMT-2000, WiMAX, WiFi me te Nihokikorangi.
Pikitia 9 Hanganga pūihi papatahi kua whakaarohia.
2. Pūihi Ngaru Tūturu (LWA)
Ko te pūihi ngaru turuturu hou tētahi o ngā tono matua mō te whakatinana i te TL metamaterial horihori. Mō ngā pūihi ngaru turuturu, ko te pānga o te pūmau ā-wāhanga β ki te koki irahiko (θm) me te whānui hihi mōrahi (Δθ) e whai ake nei:
Ko L te roa o te pūihi, ko k0 te tau ngaru i te wāhi wātea, ā, ko λ0 te roanga ngaru i te wāhi wātea. Kia mahara ka puta noa te irahiko ina |β|
3. Pūihi resonator kore-raupapa
Ko tētahi āhuatanga ahurei o te rauemi meta CRLH ko te β ka taea te 0 ina kore te auau e ōrite ki te kore. I runga i tēnei āhuatanga, ka taea te whakaputa i tētahi resonator kore-raupapa hou (ZOR). Ina kore te β, kāore he nekehanga ā-wāhanga e puta i roto i te resonator katoa. Nā te mea ko te pūmau nekehanga ā-wāhanga φ = - βd = 0 tēnei. Hei tāpiri, ko te auhoranga e whakawhirinaki ana ki te kawenga tauhohe anake, ā, kāore e whakawhirinaki ki te roa o te hanganga. E whakaatu ana te Pikitia 10 ko te pūihi kua whakaarohia kua hangaia mā te whakamahi i ngā waeine e rua me te toru me te āhua-E, ā, ko te rahi katoa ko 0.017λ0 × 0.006λ0 × 0.001λ0 me 0.028λ0 × 0.008λ0 × 0.001λ0, ia, ko te λ0 te tohu o te roangaru o te wāhi kore utu i ngā auau whakahaere o 500 MHz me 650 MHz, ia. Ka mahi te pūihi i ngā auau o te 0.5-1.35 GHz (0.85 GHz) me te 0.65-1.85 GHz (1.2 GHz), me ngā whānui whānui o te 91.9% me te 96.0%. Haunga ngā āhuatanga o te rahi iti me te whānui whānui, ko te whakanui me te whai huatanga o ngā pūihi tuatahi me te tuarua ko te 5.3dBi me te 85% (1GHz) me te 5.7dBi me te 90% (1.4GHz), ia.
Pikitia 10 Ngā hanganga pūihi E-rua me E-toru kua whakaarohia.
4. Pūihi Mokowā
Kua whakaarohia tētahi tikanga māmā hei whakanui ake i te pūaha o te pūihi CRLH-MTM, engari kāore i rerekē te rahi o tōna pūihi. E ai ki te Pikitia 11, kei roto i te pūihi ngā waeine CRLH kua whakatakotoria poutū tetahi ki tetahi, kei roto ngā papaki me ngā rārangi piko, ā, he mokowā āhua-S kei runga i te papaki. Ka whāngaihia te pūihi e tētahi porowhita CPW e ōrite ana, ā, ko tōna rahi he 17.5 mm × 32.15 mm × 1.6 mm, e rite ana ki te 0.204λ0×0.375λ0×0.018λ0, ko te λ0 (3.5GHz) te tohu mō te roanga ngaru o te wāhi wātea. E whakaatu ana ngā hua kei te mahi te pūihi i roto i te roopu auau o te 0.85-7.90GHz, ā, ko tōna whānui mahi he 161.14%. Ko te pikinga irahiko me te whai huatanga teitei rawa atu o te pūihi ka puta i te 3.5GHz, arā, ko te 5.12dBi me te ~80%, ia.
Pikitia 11 Ko te pūihi mokamoka CRLH MTM kua whakaarohia.
Mō ētahi atu kōrero mō ngā antenna, tirohia:
Wā tuku: 30 o Ākuhata 2024
