E whakaahua ana tēnei tuhinga i te hoahoa o te kaitahuri RF, me ngā hoahoa poraka, e whakaahua ana i te hoahoa o te kaitahuri RF whakarunga me te hoahoa o te kaitahuri RF whakararo. E whakahuatia ana ngā wāhanga auau e whakamahia ana i roto i tēnei kaitahuri auau C-roopu. Ka mahia te hoahoa i runga i tētahi papa miroiti mā te whakamahi i ngā wāhanga RF motuhake pērā i ngā whakaranu RF, ngā oscillator ā-rohe, ngā MMIC, ngā synthesizer, ngā oscillator tohutoro OCXO, ngā papa attenuator, me ētahi atu.
Te hoahoa o te kaitahuri RF ake
Ko te kaitahuri auau RF e pā ana ki te tahuritanga o te auau mai i tētahi uara ki tētahi atu. Ko te taputapu e tahuri ana i te auau mai i te uara iti ki te uara teitei e mōhiotia ana ko te kaitahuri ake. Nā te mea e mahi ana i ngā auau reo irirangi, e mōhiotia ana ko te kaitahuri ake RF. Ka whakamaoritia e tēnei kōwae kaitahuri ake RF te auau IF i te awhe o te 52 ki te 88 MHz ki te auau RF o te 5925 ki te 6425 GHz. Nō reira e mōhiotia ana ko te kaitahuri ake C-band. Ka whakamahia hei wāhanga o te transceiver RF kua whakatinanahia i roto i te VSAT e whakamahia ana mō ngā tono whakawhitiwhiti amiorangi.
Pikitia-1: Te hoahoa poraka kaitahuri RF ake
Kia titiro tātou ki te hoahoa o te wāhanga RF Up converter me te aratohu taahiraa-i-te-taahiraa.
Hipanga 1: Kimihia ngā Whakaranu, ngā Oscillator ā-Rohe, ngā MMIC, te synthesizer, te Oscillator tohutoro OCXO, ngā papa attenuator e wātea ana.
Hipanga 2: Tātaihia te taumata mana i ngā wāhanga rerekē o te raina, inā koa i te whakaurunga o ngā MMIC kia kore ai e neke ake i te 1dB pūwāhi kōpeketanga o te taputapu.
Hipanga 3: Hoahoahia me te whakamahi i ngā tātari Micro strip tika i ngā wāhanga rerekē hei tātari i ngā auau kāore e hiahiatia i muri i te whakaurunga o ngā whakaranu i roto i te hoahoa, i runga i te wāhanga o te awhe auau e hiahia ana koe ki te tuku.
Hipanga 4: Mahia te whakatauira mā te whakamahi i te tari ngaruiti, i te HP EEsof rānei agilent me te whānui o ngā kaiārahi e tika ana i ngā wāhi rerekē o te PCB mō te dielectric kua whiriwhiria e hiahiatia ana mō te auau kaikawe RF. Kaua e wareware ki te whakamahi i te rauemi ārai hei ārai i te wā whakatauira. Tirohia ngā tawhā S.
Hipanga 5: Hangaia te PCB, honohonoa ngā wāhanga kua hokona, kātahi ka honohonoa anō.
E ai ki te hoahoa poraka o te pikitia-1, me whakamahi ngā papa whakaitiiti e tika ana, arā, 3 dB, 6 dB rānei, hei tiaki i te pūwāhi kōpeketanga 1 dB o ngā taputapu (ngā MMIC me ngā Whakaranu).
Me whakamahi i te oscillator ā-rohe me te Synthesizer o ngā auau e tika ana. Mō te tahuritanga o te 70MHz ki te C band, e taunakihia ana te LO o te 1112.5 MHz me te Synthesizer o te awhe auau 4680-5375MHz. Ko te ture matua mō te whiriwhiri i te ranunga ko te mana LO me 10 dB nui ake i te taumata tohu whakauru teitei rawa atu i te P1dB. Ko te GCN he Whatunga Whakahaere Gain i hangaia mā te whakamahi i ngā PIN diode attenuators e whakarerekē ana i te attenuation i runga i te ngaohiko analog. Kia mahara ki te whakamahi i ngā tātari Band Pass me Low pass i ngā wā e hiahiatia ana hei tātari i ngā auau kāore e hiahiatia, me te tuku i ngā auau e hiahiatia ana.
Te hoahoa o te kaitahuri RF Down
Ko te taputapu e huri ana i te auau mai i te uara teitei ki te uara iti e mōhiotia ana ko te kaitahuri iho. Nā te mea e mahi ana i ngā auau reo irirangi, e mōhiotia ana ko te kaitahuri iho RF. Me titiro tātou ki te hoahoa o te wāhanga kaitahuri iho RF me te aratohu taahiraa-i-te-taahiraa. Ka whakamāori tēnei kōwae kaitahuri iho RF i te auau RF i te awhe mai i te 3700 ki te 4200 MHz ki te auau IF i te awhe mai i te 52 ki te 88 MHz. Nō reira e mōhiotia ana ko te kaitahuri iho C-band.
Pikitia-2: Te hoahoa poraka whakawhiti RF ki raro
E whakaatu ana te pikitia-2 i te hoahoa poraka o te kaitahuri-iho C band mā te whakamahi i ngā wāhanga RF. Me titiro tātou ki te hoahoa o te wāhanga kaitahuri-iho RF me te aratohu taahiraa-i-te-taahiraa.
Hipanga 1: E rua ngā mīhini whakaranu RF kua tīpakohia e ai ki te hoahoa Heterodyne e huri ana i te auau RF mai i te awhe 4 GHz ki te awhe 1GHz me te awhe 1 GHz ki te awhe 70 MHz. Ko te mīhini whakaranu RF i whakamahia i roto i te hoahoa ko MC24M, ā, ko te mīhini whakaranu IF ko TUF-5H.
Hipanga 2: Kua hangaia ngā tātari e tika ana hei whakamahi i ngā wāhanga rerekē o te kaitahuri RF iho. Kei roto i ēnei ko te 3700 ki te 4200 MHz BPF, te 1042.5 +/- 18 MHz BPF me te 52 ki te 88 MHz LPF.
Hipanga 3: Ka whakamahia ngā IC whakakaha MMIC me ngā papa whakaitiiti i ngā wāhi e tika ana e whakaaturia ana i roto i te hoahoa poraka hei whakatutuki i ngā taumata mana i te putanga me te whakaurunga o ngā taputapu. Ka whiriwhiria ēnei kia rite ki te hiahia o te pūwāhi whakanui me te 1 dB o te pūwāhi kōpeketanga o te kaitahuri RF ki raro.
Hipanga 4: Ko te synthesizer RF me te LO i whakamahia i roto i te hoahoa kaitahuri ake ka whakamahia anō hoki i roto i te hoahoa kaitahuri iho e whakaaturia ana.
Hipanga 5: Ka whakamahia ngā wehewehe RF ki ngā wāhi tika hei tuku i te tohu RF kia haere i te taha kotahi (arā, whakamua) me te aukati i tana whakaata RF i te taha whakamuri. Nō reira e mōhiotia ana ko te taputapu kotahi-ara. Ko te GCN he tohu mō te whatunga whakahaere Gain. Ko te mahi a te GCN he taputapu whakaiti taurangi e taea ai te whakarite i te putanga RF e hiahiatia ana e te tahua hononga RF.
Whakatau: He rite ki ngā ariā kua whakahuatia i roto i tēnei hoahoa kaitahuri auau RF, ka taea te hoahoa i ngā kaitahuri auau i ētahi atu auau pēnei i te roopu L, te roopu Ku me te roopu mmwave.
Wā tuku: Hakihea-07-2023
