Te kaupapa o ngā pūihi whakawhitiwhiti kōrero me ngā taputapu,
Me pēhea te whakapai ake i te whiwhi me te tuku tohu mō ngā whakakaha tohu 3g/4g?
Paetukutuku:https://www.lintratek.com/
Tuatahi, te mātāpono o te pūihi:
1.1 Te whakamāramatanga o te pūihi:
He taputapu e taea ai te tuku i ngā ngaru hikohiko ki tētahi ahunga motuhake i te wāhi, ka taea rānei te whiwhi ngaru hikohiko mai i tētahi ahunga motuhake i te wāhi.
1.2 Ngā mahi a te pūihi:
Ø Te tahuritanga pūngao – te tahuritanga o te ngaru ārahi me te ngaru wāhi kore utu; Te irahiko ahunga (te whiwhinga) – he aronga motuhake tōna.
1.3 Te mātāpono irahiko pūihi：
1.4 Ngā Tawhā Pūihi
Tawhā irahiko
Ø Te whānui o te haurua o te hiko, te ōwehenga o mua ki muri;
Aratau pōraritanga Ø, te wehewehe pōraritanga whakawhiti;
Ø Tauwehenga aronga, whakanui pūihi;
Ø Te pū matua, te pū tuarua, te pehi i te pū taha, te kore whakakī, te hekenga o te hihi…
Tawhā ara iahiko
Te ōwehenga ngaru tū ngaohiko VSWR, te tauwehenga whakaata Γ, te ngaronga whakahoki RL;
Ø Āraitanga tāuru Zin, mate tuku TL;
Ø te wehewehenga Iso;
Ø Te Whakawhitiwhitinga Tuatoru Whakakorekore PIM3…
Te taha o te pūihi
Whānuitanga o te Kurupae Whakapae
Ōwehenga o mua ki muri: E tohu ana i te ōwehenga o te mana i tukuna whakamua ki te pūihi me te mana i tukuna whakamuri i roto i te ±30°.
Te whanaungatanga i waenga i te whakanui me te rahi o te pūihi me te whānui o te hihi
Mā te whakawhāiti i te "taia", ka nui ake te kukū o te tohu, ka teitei ake te whakanui, ka nui ake te rahi o te pūihi, ā, ka whaiti ake te whānui o te hihi;
Ko ētahi o ngā āhuatanga matua o te whakanui i te pūihi:
He taputapu kore mahi te pūihi, ā, kāore e taea te whakaputa pūngao. Ko te whakanui pūihi ko te kaha ki te arotahi i te pūngao hei tuku, hei whiwhi rānei i ngā ngaru hikohiko i tētahi ahunga motuhake.
Ø Ka puta te whakanui o te pūihi mā te whakanoho o ngā wiri. Ka teitei ake te whakanui, ka roa ake te roa o te pūihi. Whakanuia te whakanui mā te 3dB, ā, kia rua te rōrahi.
Ka teitei ake te whakanui o te pūihi, ka pai ake te aronga, ka kukū ake te pūngao, ā, ka whaiti ake te pūngao.
1.5 Ngā Tawhā Irahiko
Te pōraritanga: e pā ana ki te ara, te huringa rānei o te ira hiko i te wāhi.
1.6 Ngā Tawhā Porowhita
Ngaronga whakahoki
Tuarua, ngā hua pūihi
2.1 Tikanga Whakaingoa Pūihi：
Ngā kāwai pūihi: ODP (pūihi pereti ahunga o waho), OOA (pūihi ahunga-katoa o waho), IXD (pūihi tuanui o roto), OCS (pūihi ahunga-rua o waho), OCA (pūihi tautau o waho), OYI (pūihi Yagi o waho), ORA (pūihi mata maka o waho), IWH (pūihi pakitara o roto) me ērā atu.
Koki haurua-mana: 032,065,090,105,360 (pūihi teihana turanga) 020,030,040,050,060,075,090,120,160,360 (pūihi tukurua)
Aratau whakapūtātanga: R (pūtātanga takirua), V (pūtātanga kotahi)
Whiwhinga: Ko te uara mōrahi ko te 21dbi i runga i te uara tuturu
Ngā momo hononga: D (upoko Din), N (upoko momo-N), S (upoko SMA), T (upoko TNC) me ētahi atu
Rōpū auau:
Waehere Whakatakotoranga: Ko ngā reta Rōmana e tohu ana i te whakaputanga o te hua. Ko ngā reta me ngā tau e whai ake nei e tohu ana i te koki tō, te āhua, me ētahi atu mōhiohio. Momo F; Whakahaere hiko V; Whakarerekētanga hiko mamao RV
2.2 Pūihi Teihana Tūāpapa
Pūihi Ahu-Ahu-Ahu-rua Pūihi Auau-Rua
Antenna Auau-Toru
Antenna tuanui
Pūihi Whakamau Pakitara
Pūihi Yagi
Pūihi Whatunga
Pūihi Whānui-Ahunga-katoa Pūihi Pereti Pūihi Taki-Wā
3.1 Wehewehe Mana
Ko te wehewehe mana he taputapu e wehewehe ana i te kaha o te tohu putanga kotahi ki ngā putanga e rua, neke atu rānei. He kaitahuri ārai mate tēnei.
Ø Ka taea te huri i te wehewehe mana hei whakakapi i te whakakotahi?
Ina whakamahia hei synthesizer, ehara i te mea me wehe motuhake, me te iti o te ōwehenga ngaru tū anake, engari me aro hoki ki te hiahia kia tu atu ki te mana teitei. I te mea kāore e ōrite ngā putanga putanga o te wehewehe mana kōhao e whakamahia whānuitia ana, he nui te ngaru tū; Nā te iti o te ātete mana o te wehewehe mana microstrip, kāore mātou e tūtohu kia whakamahia te wehewehe mana hei whakakapi i te whakakotahi.
Te Wehewehe Mana Poka
Tuawhā, te whakataki coupler
4.1 Hononga
Ko te hononga he momo wāhanga e tohatoha ana i te kaha o te tohu whakauru mā roto i te papa hiko me te hononga papa aukume hei wāhanga o te putanga pito hononga, ā, ko te toenga o te putanga pito putanga hei whakaoti i te tohatoha mana.
Ø Kāore te tohatoha mana o te hononga i wehea ōritetia. E mōhiotia ana hoki ko te tauira mana.
Hononga ahunga
Ko ngā hononga ahunga e whakamahia whānuitia ana me te ahunga rere kua tohua o ngā tohu ngaruiti mō te tauira, ko te kaupapa matua he wehe me te wehe i te tohu, he whakaranu rānei i ngā tohu rerekē, i te korenga o te kawenga ā-roto, he maha ngā wā ka whakamahia ngā hononga ahunga hei whatunga tauranga-whā.
Hononga poka
Ngā Āhuatanga: He kaha teitei te amo, he iti te mate.
Te take:
1. Kī tonu te kōhao i te hau, ā, i te tukanga tuku, he iti ake te marara o te pāpāho i puta mai i te reo hau.
2. Ko te whitiki waea hono he mea hanga i te nuinga o te wā ki te kaiārahi hiko he pai te kawe hiko (pērā i te hiriwa i runga i te mata parahi), ā, he iti noa te ngaronga o te kaiārahi hiko.
3. He nui te rōrahi o te kōhao, he tere te marara o te wera. He kaha te ātete ki te kaha nui.
Whakaiti
Ø He huānga tauutuutu rua-awa te attenuator
Ko ngā whakaitiiti mimiti e whakamahia whānuitia ana ko ngā whakaitiiti ngongo.
Ko te attenuator coaxial te mea e whakamahia whānuitia ana i roto i te hangarau, arā, he whatunga whakaiti "π" "T" rānei.
E rua ngā momo whakaitiiti pūmau me ngā momo whakaitiiti taurangi o ngā attenuators coaxial.
Ø Ko ngā attenuators te nuinga o te wā e whakamahia ana hei whakahaere i te kaha tuku o ngā tohu ngaruiti i roto i te pūnaha kite me te whakapau i te kaha nui, kia whānui ake ai te whānuitanga hihiri o te ine tohu, pērā i ngā mita hiko, ngā tātaritanga whānuitanga, ngā whakakaha, ngā kaiwhiwhi, me ētahi atu.
Paetukutuku:https://www.lintratek.com/
#Whakakaha 4g #Pūwhakahoki 4g
衰减器
Ø衰减器是二端口互易元件
Ø衰减器最常用的是吸收式衰减器.
Ø工程中通常使用的是同轴型衰减器，由“π”型或“T”型衰减网络组成。
Ø同轴衰减器通常有固定及可变衰减两种。
Ø衰减器主要用于检测系统中控制微波信号传输能量、消耗超额能量，因而扩展信号测量的动态范围，诸如功率计，频谱分析仪，放大器，接收器等。
Wā tuku: Hanuere-18-2024