Ko te whānui o te hononga he tawhā matua anō hoki o te pūihi. Ko te whānui o te hononga e whakaatu ana i te whānuitanga o ngā auau ka taea e te pūihi te tuku tika, te whiwhi rānei i te pūngao. I te nuinga o te wā, ko te whānui o te hononga e hiahiatia ana tētahi o ngā tawhā e whakamahia ana hei whiriwhiri i te momo pūihi. Hei tauira, he maha ngā momo pūihi he iti rawa ngā whānui o te hononga. Kāore e taea te whakamahi i ēnei pūihi i roto i ngā tono whānui.
Ko te whānui o te ara iahiko ka whakahuatia i runga i te ōwehenga ngaru tū ngaohiko (VSWR). Hei tauira, ka taea te whakaahua i tētahi pūihi he <1.5 te VSWR i runga i te 100-400 MHz. E kī ana te kōrero he iti iho i te 0.2 te tauwehenga whakaata puta noa i te awhe auau kua whakahuatia. Nō reira, o te mana e tukuna ana ki te pūihi, 4% noa iho o te mana ka whakaatahia ki te tuku. Hei tāpiri, ko te ngaronga whakahoki S11 =20* LOG10 (0.2) = 13.98 tesipere.
Kia mōhio mai, ehara i te mea ko te 96% o te hiko ka tukuna ki te pūihi i roto i te ahua o te irahiko hiko e horapa ana. Me whai whakaaro ki te ngaronga hiko.
Hei tāpiritanga, ka rerekē te tauira irahiko i runga i te auau. I te nuinga o te wā, kāore te āhua o te tauira irahiko e tino whakarerekē i te auau.
Tērā pea ētahi atu paerewa e whakamahia ana hei whakaahua i te whānui o te ira. Ka taea tēnei te whakapōraru i roto i tētahi whānuitanga. Hei tauira, ka taea te whakaahua i tētahi pūihi porowhita whakapōraru he ōwehenga tuaka <3 dB mai i te 1.4-1.6 GHz (iti iho i te 3 dB). Ko tēnei whānuitanga tautuhinga whānui o te whakapōraru he tata ki ngā pūihi porowhita whakapōraru.
He maha ngā wā ka tohua te whānui o te ara iahiko ki roto i tōna Whānuitanga Hautau (FBW). Ko te FBW te ōwehenga o te awhe auau i wehea ki te auau pokapū (te auau teitei me te auau iti rawa). E pā ana hoki te "Q" o te pūihi ki te whānui o te ara iahiko (ko te Q teitei ake te tikanga he iti ake te whānui o te ara iahiko, ā, ko te ritenga kē).
Hei tauira mō te whānui o te hononga, anei tētahi ripanga o ngā whānui mō ngā momo pūihi noa. Mā tēnei ka whakautua ngā pātai, "He aha te whānui o te hononga o tētahi pūihi dipole?" me "Ko tēhea pūihi he whānui ake - he pūihi papaki, he pūihi helix rānei?". Hei whakatairite, kei a tātou ngā pūihi me te auau pokapū o te 1 GHz (gigahertz) ia pūihi.
Ngā whānuitanga o te ara o ētahi pūihi noa.
E kitea ana i te ripanga, ka rerekē rawa te whānui o te pūihi. He iti rawa te whānui o ngā pūihi papaki (microstrip), engari he nui rawa te whānui o ngā pūihi porowhita.
Wā tuku: Whiringa-ā-rangi 24-2023
