In addition to the impedance of the RF signal line, the laminated structure of the RF PCB single board also needs to consider issues such as heat dissipation, current, devices, EMC, structure and skin effect. Kazhinji isu tiri mukugadzika nekucheka kwehuwandu hwakadhindwa mapuranga. Tevedza dzimwe nheyo dzakakosha:
A) Imwe neimwe denderedzwa yeRF PCB yakafukidzwa nenzvimbo yakakura isina ndege yemagetsi. Iyo yepamusoro uye yakaderera acjicent zvikamu zveRF Wiring Layer inofanira kunge iri pasi pezvirongwa.
Kunyangwe kana iri yedhijitari-analog yakasanganiswa bhodhi, chikamu chedhijitari chinogona kuve nepagetsi ndege, asi iyo RF Area ichine chekuita nezvinodiwa munzvimbo yakakura pane imwe neimwe pasi.
B) yeRF Double Panel, iyo yepamusoro dura ndiyo chiratidzo cheSignal, uye pasi pasi ndege yenyika.
Four-Layer RF Imwe Bhodhi, iyo yepamusoro layer ndeye signal layer, yechipiri uye yechina zviyero zviri pasi pezvirongwa zvepasi, uye yechitatu denderedzwa ndere simba uye kudzora mitsara. Mune zviitiko zvakakosha, mamwe maratidziro eRF chiratidzo anogona kushandiswa pane yechitatu layer. Zvimwe zvikamu zvemabhodhi eRF, zvichingodaro.
C) yeRF kudzokera kumashure, iyo yepamusoro uye yakaderera nzvimbo nzvimbo mbiri. Kuti uderedze kusavimbika kwekuregererwa kunokonzerwa neVias uye vanobatana, yechipiri, yechitatu, yechina, uye yechishanu zviyero zvinoshandisa madhigiriidhi.
Imwezve mitsetse mitsetse pazasi pepasi pane zvese zviri pasi chiratidzo zviratidzo. Saizvozvo, iwo maviri akawirirana zvigadzikiso zveRF Signal layer inofanira kunge iri ivhu, uye rimwe nerimwe danda rinofanira kufukidzwa nenzvimbo yakakura.
D) Yekakwirira-simba, yakakwirira-yazvino rf mabhodhi, iyo RF huru yekubatanidza inofanirwa kuiswa pamusoro peiyo yepamusoro denderedzwa uye yakabatana neine yakafara microstrop mutsara.
Izvi zvinokonzeresa kupisa kusapindira uye kurasikirwa nesimba, kuderedza waya kugadzirisa kukanganisa.
E) ndege yemagetsi yeiyo digital chikamu inofanira kunge iri padyo nendege yepasi uye yakarongedzwa pazasi pevhu.
Nenzira iyi, kugona pakati pemapuranga maviri esimbi kunogona kushandiswa seyekuchenesa kugona kwesimba, uye panguva imwe chete, iyo ndege yepasi, iyo ndege yepasi inogona zvakare kudzivirira radiation yazviparadzirwa pachirongwa chemagetsi.
Iyo chaiyo yekunyepedzera nzira uye ndege dzekupatsanurwa dzinogona kureva nezve "20050818 yakadhindwa redunhu dhizaini dhizaini-EMC zvinodiwa '
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Rf bhodhi rinoshandisa zvinodiwa
2.1 kona
Kana iyo RF chiratidzo ichienda kumakona ekurudyi, upamhi hwehupombwe hunobudirira huchava pamakona anowedzera, uye kusakwana kuchaita kuti zvifadze uye kukonzeresa kuratidzwa. Naizvozvo, zvakafanira kubata nemakona, kunyanya munzira mbiri: kucheka kwekona uye kutenderera.
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(2) radius yeARC angle inofanira kunge yakakura zvakakwana. Kazhinji kutaura, simbisa: r> 3w.
2.2 microstrip wiring
Iyo yepamusoro yepamusoro yePCB inotakura rf chiratidzo, uye ndege yemapepa pasi peRF chiratidzo chinofanira kuve chakazara pasi ndege kuumba microptrep mutsara mutsara. Kuve nechokwadi chekutendeseka kwechimiro cheiyo microstrip mutsara, pane zvinotevera zvinodiwa:
. Uye mune ye3W huwandu, hapafanire kunge pasina-pasi viasi.
(2) kureba pakati peiyo microstrip mutsara uye madziro ekuchengetera anofanirwa kuchengetwa pamusoro 2w. (ONA: W ndiyo mutsara wehupamhi).
(3. Iyo gomba rinopararira riri pasi pe λ / 20, uye ivo vakarongedzwa nenzira chaiyo.
Pamucheto wevhu mhangura mhangura foil inofanira kunge yakatsiga, flat, uye isina burrs yakapinza. Zvinokurudzirwa kuti mupendero wevhu rakakura kupfuura kana kuenzana nehupamhi hwe 1.5W kana 3h kubva pamupendero weiyo microstrop mutsara, uye h humbozha yeiyo microstrate substrate svikiro.
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2.3 Stripline Wiring
Radio radioins masaini dzimwe nguva dzinopfuura nepakati pePCE PCB. Iyo inonyanya kujairika kubva kune yechitatu dura. Iyo yechipiri uye yechina zviyero zvinofanirwa kuve yakakwana pasi ndege, kureva, iyo eccentric stripline chimiro. Kutendeka kwechimiro kwetsiva yemutsara kuchavimbiswa. Zvinodiwa zvichave:
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. Iyo gomba rinopararira riri pasi pe λ / 20, uye ivo vakarongedzwa nenzira chaiyo. Pamucheto wevhu chivharo chemhangura chinofanira kuve chakanyorova, flat uye isina burn.
Zvinokurudzirwa kuti mupendero wevhu-rakapfekera ganda reganda rakakura kupfuura kana rakaenzana nehupamhi hwe 1.5W kana upamhi hwe3 kubva kumucheto kweiyo strip line. H inomiririra huwandu hwakazara hwehukuru hwepamusoro uye hwakaderera dielectric zvikamu zvemutsara wetsiva.
. kubuda kunze.