Ngā Pūrongo - Te mātāpono o te whakanui pūihi, me pēhea te tatau i te whakanui pūihi

Ko te whakanui pūihi e pā ana ki te whakanui mana irahiko o te pūihi i roto i tētahi ahunga motuhake e pā ana ki tētahi pūihi pūtake pūwāhi pai. E tohu ana i te kaha irahiko o te pūihi i roto i tētahi ahunga motuhake, arā, ko te pai o te whiwhinga tohu, te tukunga rānei o te pūihi i taua ahunga. Ko te teitei ake o te whakanui pūihi, ko te pai ake o te mahi a te pūihi i roto i tētahi ahunga motuhake, ā, ka taea e ia te whiwhi, te tuku rānei i ngā tohu me te whai hua ake. Ko te whakanui pūihi e whakaatuhia ana i roto i ngā desipere (dB) ā, ko tētahi o ngā tohu nui mō te aromatawai i te mahi a te pūihi.

Muri iho, ka ārahi ahau i a koe ki te mārama ki ngā mātāpono taketake o te whakanui pūihi me te pēhea te tatau i te whakanui pūihi, me ētahi atu.

1. Te mātāpono o te whakanui pūihi

I roto i te ariā, ko te whakanui pūihi ko te ōwehenga o te mātotoru mana tohu i hangaia e te pūihi tuturu me te pūihi pūtake pūwāhi pai i tētahi tūranga i roto i te wāhi i raro i te mana whakauru kotahi. Ka whakahuatia te ariā o te pūihi pūtake pūwāhi i konei. He aha te mea? Inaa, he pūihi e whakaarohia ana e te tangata ka tukuna ngā tohu i te ōrite, ā, ko tōna tauira hihi tohu he porowhita horapa ōrite. Inaa, he ahunga whakanui hihi ngā pūihi (e kiia nei i muri nei ko ngā mata hihi). Ka kaha ake te tohu i runga i te mata hihi i te uara hihi o te pūihi pūtake pūwāhi ariā, i te mea ka ngoikore te hihi tohu i ētahi atu ahunga. Ko te whakataurite i waenga i te uara tūturu me te uara ariā i konei ko te whakanui o te pūihi.

E whakaatu ana te pikitia i teRM-SGHA42-10tauira hua Whiwhi raraunga

He mea tika kia mōhiotia ko ngā pūihi kore mahi e kitea whānuitia ana e te tangata noa, ehara i te mea ka whakarei ake i te mana tuku, engari ka pau hoki te mana tuku. Ko te take e kiia tonutia ana he whai hua, nā te mea ka whakatakahia ētahi atu ahunga, ka kukū te ahunga irahiko, ā, ka pai ake te tere whakamahinga tohu.

2. Te tatau i te whakanui pūihi

Ko te whakanui pūihi te tohu o te nui o te hihi kukū o te mana ahokore, nō reira he hononga tata ki te tauira hihi pūihi. Ko te māramatanga whānui ko te whaiti o te poro matua me te iti o te poro taha i roto i te tauira hihi pūihi, ka teitei ake te whakanui. Nō reira, me pēhea te tatau i te whakanui pūihi? Mō te pūihi whānui, ka taea te whakamahi i te tātai G (dBi) = 10Lg {32000/(2θ3dB, E × 2θ3dB, H)} hei whakatau tata i tōna whakanui. tātai,
Ko 2θ3dB, E me 2θ3dB, H ngā whānui hihi o te pūihi i runga i ngā papa matua e rua; ko 32000 ngā raraunga ā-pūtaiao.

He aha te tikanga mēnā he pūihi kei roto i tētahi tuku ahokore 100mw me te whakanui o te +3dbi? Tuatahi, hurihia te mana tuku ki te whakanui tohu dbm. Ko te tikanga tatau ko:

100mw=10lg100=20dbm

Kātahi ka tatauhia te mana tuku katoa, he ōrite ki te tapeke o te mana tuku me te whakanui pūihi. Ko te tikanga tatau penei:

20dbm+3dbm=23dbm

Hei whakamutunga, ka tatauhia anō te mana tuku ōrite penei:

10^（23/10）≈200mw

Ara, ka taea e te pūihi whakanui +3dbi te whakaneke rua i te mana tuku ōrite.

3. Ngā pūihi whakanui noa

He pūihi omnidirectional ngā pūihi o ā tātou pouara ahokore noa. Kei te papa whakapae poutū tōna mata irahiko ki te pūihi, ko te wāhi tēnei e nui rawa atu ai te irahiko, engari ko te irahiko kei runga ake i te tihi me raro i te raro o te pūihi ka tino ngoikore. He rite ki te tango i tētahi patu tohu ka whakapapatahi.

Ko te whakanui pūihi te "hanganga" noa iho o te tohu, ā, ko te rahi whakanui e tohu ana i te tere whakamahinga o te tohu.

Kei reira anō hoki tētahi pūihi pereti noa, he pūihi aronga te nuinga. Kei roto tōna mata irahiko i te wāhi āhua-pā i mua tonu i te pereti, ā, ka tino ngoikore ngā tohu i ētahi atu wāhi. He rite tonu ki te tāpiri i tētahi taupoki rama ki tētahi pūrama.

I roto i ngā kupu poto, he pai ake ngā painga o ngā pūihi whakanui-teitei, arā, he roa ake te awhe me te kounga tohu pai ake, engari me whakarērea e rātou te irahiko i ngā ahunga takitahi (he maha ngā ahunga e maumauria ana). Ko ngā pūihi whakanui-iti he whānui te awhe ahunga engari he poto te awhe. Ina puta ngā hua ahokore i te wheketere, ka whirihorahia e ngā kaihanga kia rite ki ngā āhuatanga whakamahinga.

E hiahia ana ahau ki te tūtohu i ētahi atu hua pūihi he pai te whakanui mō te katoa: