Mātauranga Pūihi Whiwhi Pūihi

1. Te whakanui i te pūihi
PūihiKo te whakanui e pā ana ki te ōwehenga o te mātotoru o te mana hihi o te pūihi i roto i tētahi ahunga kua tohua ki te mātotoru o te mana hihi o te pūihi tohutoro (he pūtake pūwāhi hihi pai te nuinga) i te mana whakauru kotahi. Ko ngā tawhā e tohu ana i te whakanui o te pūihi ko dBd me dBi.
Ko te tikanga ā-tinana o te whakanui ka taea te mārama penei: hei whakaputa i tētahi tohu o tētahi rahi i tētahi pūwāhi i tētahi tawhiti, ki te whakamahia he pūtake pūwāhi kore-aronga pai hei pūihi tuku, me whai mana tāuru o te 100W, engari ki te whakamahia he pūihi ahunga me te whakanui o G=13dB (20 ngā wā) hei pūihi tuku, ko te mana tāuru he 100/20=5W anake. Arā, ko te whakanui o tētahi pūihi, e ai ki tōna pānga hihi i te ahunga hihi mōrahi, ko te maha o te mana tāuru kua whakanuia ki te pūtake pūwāhi kore-aronga pai.

Ka whakamahia te whakanui pūihi hei ine i te kaha o te pūihi ki te tuku me te whiwhi tohu i tētahi ahunga motuhake, ā, ko tētahi o ngā tawhā tino nui mō te whiriwhiri i tētahi pūihi. He hononga tata te whakanui ki te tauira pūihi. Ko te whaiti ake o te porowhita matua o te tauira, ko te iti ake hoki o te porowhita taha, ko te teitei ake o te whakanui. Kei te whakaatuhia te whanaungatanga i waenga i te whānui o te porowhita matua me te whakanui pūihi i te Pikitia 1-1.