Usibye kubangamira umurongo wibimenyetso bya RF, imiterere yamuritswe yubuyobozi bumwe bwa RF PCB igomba no gusuzuma ibibazo nko gukwirakwiza ubushyuhe, ibigezweho, ibikoresho, EMC, imiterere n'ingaruka zuruhu.Mubisanzwe turi murwego no gutondekanya imbaho nyinshi zacapwe.Kurikiza amahame shingiro:
A) Buri cyiciro cya RF PCB gitwikiriwe nubuso bunini butagira indege yingufu.Hejuru no hepfo yegeranye ya RF wiring layer igomba kuba indege zubutaka.
Nubwo ari ikibaho kivanze na digitale, igice cya digitale gishobora kugira indege yingufu, ariko agace ka RF karacyafite ibyangombwa bisabwa byubatswe ahantu hanini kuri buri igorofa.
B) Kubice bibiri bya RF, igice cyo hejuru nikimenyetso cyerekana, naho igice cyo hasi nindege yubutaka.
Ibice bine bya RF imwe imwe, urwego rwo hejuru ni ikimenyetso cyerekana, icya kabiri n'icya kane ni indege zubutaka, naho igice cya gatatu ni icy'umurongo wo kugenzura no kugenzura.Mubihe bidasanzwe, imirongo ya signal ya RF irashobora gukoreshwa kumurongo wa gatatu.Ibice byinshi byubuyobozi bwa RF, nibindi.
C) Kubirindiro bya RF, hejuru no hepfo yubutaka byombi ni ubutaka.Kugirango ugabanye guhagarika impedance biterwa na vias hamwe nu murongo, icyiciro cya kabiri, icya gatatu, icya kane, nicya gatanu bakoresha ibimenyetso bya digitale.
Ibindi bice byumurongo hejuru yubutaka byose ni ibimenyetso byerekana ibimenyetso.Mu buryo nk'ubwo, ibice bibiri byegeranye byerekana ibimenyetso bya RF bigomba kuba hasi, kandi buri gice kigomba gutwikirwa ahantu hanini.
D) Kubububasha bukomeye, bugezweho-bubaho bwa RF, imiyoboro nyamukuru ya RF igomba gushyirwa kumurongo wo hejuru kandi igahuzwa numurongo mugari wa microstrip.
Ibi bifasha gukwirakwiza ubushyuhe no gutakaza ingufu, kugabanya amakosa yo kwangirika.
E) Indege yingufu zigice cya digitale igomba kuba hafi yindege yubutaka kandi igashyirwa munsi yindege yubutaka.
Muri ubu buryo, ubushobozi buri hagati yibyuma byombi birashobora gukoreshwa nka capacitori yoroshye yo gutanga amashanyarazi, kandi mugihe kimwe, indege yubutaka irashobora kandi gukingira imishwarara ikwirakwizwa mumashanyarazi.
Uburyo bwihariye bwo gutondekanya hamwe nibisabwa kugabana indege birashobora kwerekeza kuri "20050818 Icapa ryicapiro ryumuzunguruko wateguwe-Ibisabwa EMC" byatangajwe nishami rishinzwe ibishushanyo mbonera bya EDA, kandi ibipimo byo kumurongo bizatsinda.
2
Ibisabwa byubuyobozi bwa RF
2.1 Inguni
Niba ibimenyetso bya RF byerekana inzira iburyo, ubugari bwumurongo bugaragara kumpera biziyongera, kandi impedance izahagarara kandi itera gutekereza.Kubwibyo, birakenewe guhangana ninguni, cyane cyane muburyo bubiri: gukata inguni no kuzenguruka.
:
(2) Iradiyo yinguni ya arc igomba kuba nini bihagije.Muri rusange, menya neza: R> 3W.
2.2
Igice cyo hejuru cya PCB gitwara ibimenyetso bya RF, kandi indege yindege munsi yikimenyetso cya RF igomba kuba indege yuzuye kugirango ikore umurongo wa microstrip.Kugirango uburinganire bwimiterere yumurongo wa microstrip, haribisabwa bikurikira:
(1) Impande kumpande zombi zumurongo wa microstrip zigomba kuba byibura ubugari bwa 3W uhereye kumpera yindege yubutaka hepfo.Kandi murwego rwa 3W, ntihakagombye kubaho vias idafite ishingiro.
(2) Intera iri hagati yumurongo wa microstrip nurukuta rukingira igomba kubikwa hejuru ya 2W.(Icyitonderwa: W ni ubugari bwumurongo).
.Umwanya uri hagati yu mwobo uri munsi ya λ / 20, kandi uringaniye.
Uruhande rwumuringa wubutaka rugomba kuba rworoshye, ruringaniye, kandi ntirurumuri rukomeye.Birasabwa ko inkombe yumuringa wambaye ubutaka iruta cyangwa ihwanye nubugari bwa 1.5W cyangwa 3H uhereye kumpera yumurongo wa microstrip, naho H igereranya ubunini bwikigereranyo cya microstrip.
(4) Birabujijwe ko ibimenyetso bya RF bifuza kurenga icyuho cyindege yubutaka bwa kabiri.
2.3
Ibimenyetso bya radiyo yumurongo rimwe na rimwe binyura murwego rwo hagati rwa PCB.Igisanzwe cyane ni kuva murwego rwa gatatu.Igice cya kabiri n'icya kane bigomba kuba indege yuzuye y'ubutaka, ni ukuvuga imiterere ya eccentric stripline.Uburinganire bwuburinganire bwumurongo bugomba kwemezwa.Ibisabwa ni:
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(2) Birabujijwe ko umurongo wa RF urenga icyuho kiri hagati yindege zo hejuru no hepfo.
.Umwanya uri hagati yu mwobo uri munsi ya λ / 20, kandi uringaniye.Uruhande rwubutaka rwumuringa rugomba kuba rworoshye, ruringaniye kandi ntirurumuri rukarishye.
Birasabwa ko impande zuruhu rwumuringa zambaye ubutaka ziruta cyangwa zingana n'ubugari bwa 1.5W cyangwa ubugari bwa 3H uhereye kumurongo wumurongo.H yerekana ubunini bwuzuye bwurwego rwo hejuru na hepfo ya dielectric yumurongo wumurongo.
. ubugari bwurwobo rusohoka ni umurongo wikubye inshuro zirenga 5 uburebure bwa dielectric yose, niba ubugari bwumurongo butarujuje ibisabwa, noneho hejuru no hepfo yegeranye yegeranye ya kabiri indege yerekanwe.