8 Yakajairwa Yepamusoro Frequency PCB Dhizaini Zvikanganiso uye Mhinduro

Yakakwira frequency PCB dhizaini zvikanganiso zvinogona kukonzera kuderera kwekuita kwakasimba, kusanganisira kukanganiswa kwechiratidzo, EMI isingadiwe, uye nyaya dzekuvimbika mune yakakwirira-kumhanya kana RF masisitimu. Kunyangwe vagadziri vakanyatsodzidziswa vanogona kufuratira zvinhu zvisinganzwisisike senge impedance kugadzikana, yekudzoka nzira yekutendeseka, uye kuburikidza neparasitics.

Kunzwisisa matambudziko aya akajairika—uye kuziva magadzirisirwo awo—kwakakosha pakuchengetedza magadzirirwo akarurama uye kugona kugadzirwa. Chinyorwa chino chinotsanangura zvikanganiso zvinowanzo sangana nemainjiniya mukugadzirwa kwePCB kwakawanda uye chinopa mhinduro dzinoshanda uye dzakavakirwa pahunyanzvi kune imwe neimwe.

1. Impedance Control isina kufanira

Kuchengeta chaiyo impedance ibwe repakona repamusoro frequency PCB dhizaini. Mismatched impedance inotungamira kune chiratidzo chekuratidzira, kuwedzera kurasikirwa kwekuisa, uye kuderedzwa kwekuita nguva, kunyanya mumaseketi eGHz-level. Dambudziko rinowanzo kumuka kubva kune isina kuenzana trace wides, isiriyo dielectric ukobvu, kana zvisingaenderane zvezvinhu zvinhu.

Kuti izvi zvisaitike, vagadziri vanofanira kuita masimulation e pre-layout impedance vachishandisa maturusi akadai sePolar Si8000 kana ADS, kutsanangura target impedance ye layer yega yega inodzorwa, uye kusimbisa ne time-domain reflectometry (TDR) panguva ye prototyping. Kusarudza zvinhu zvine stable dielectric constants (low Dk) uye low dissipation factors (Df) kunoita kuti pave ne transmission characteristics dzakafanana pakuchinja kwe tembiricha uye frequency.

2. Ground isina kukwana uye Power Plane Design

Iyo isina kurongeka ivhu sisitimu ndeimwe yeanowanzo yakakwira frequency PCB dhizaini kukanganisa. Kupatsanura kana kusaenderera ndege dzepasi dzinounza dzisingafungidzike nzira dzekudzoka uye kugadzira EMI hotspots. Izvi zvinoitika kana vagadziri vanoparadzanisa analog, dijitari, uye RF zvikonzero pasina kufunga kudzoka kuenderera mberi.

Mhinduro iri pakuchengetedza mapuraneti makuru asina kupwanyika uye kunyatsoongorora mapuraneti epasi anodzikisa nzvimbo ye loop. Dzora ma trace ekumhanya kwepamusoro zvakananga pamusoro pemareferensi epasi akasimba, shandisa ma ground vias akawanda akatenderedza zvikamu zve high-frequency, uye isa ma stitching vias pedyo ne layer transitions kuderedza return path impedance. Kugadzira mapuraneti zvakanaka hakungoderedzi EMI chete asiwo kunovandudza kusimba kwechiratidzo chose.

3. Yakashata Trace Routing uye Length Matching

Kukanganisa kwenzira kunowanzo shatisa mashandiro echiratidzo chepamusoro. Yakapinza 90 ° inotendeuka, isingaenderane mutsauko wepakati, uye isina kuenzana yekutevera kureba zvese zvinopa chiratidzo skew uye chikamu chakakanganiswa. Panzvimbo pemakona akapinza, shandisa 45° makona kana akatsetseka arcs kuchengetedza yunifomu impedance parutivi rwekutsvaga.

Masiginecha akasiyana, akadai seLVDS kana USB 3.0, anoda kuenzana-kureba kufananidzwa kudzivirira kusawirirana kwenguva. Chengetedza maviri aya achifambiswa zvakaenzanirana uye dzivirira kuyambuka mapana endege. Pamusoro pezvo, deredza kubatanidza nemagetsi ane ruzha kana mitsetse yedhijitari kuchengetedza masaini epamusoro kubva pakukanganiswa. Iyo yakarangwa nzira yenzira inovimbisa akachena mafungu uye mamwe anofanofungidzira kutapurirana maitiro.

4. Kunyanya Kushandisa Vias

Vias yakakosha pakubatanidza interlayer, asi kushandiswa kwavo kwakanyanya kana kusakafanira ndiko kunowanzo kwira frequency PCB dhizaini kukanganisa. Imwe neimwe kuburikidza inounza parasitic capacitance uye inductance, iyo inoshatisa chiratidzo chechikamu uye kuwedzera kuisa kurasikirwa. Matambudziko anowedzera kana akareba kuburikidza ne stubs achiita seasingadiwe resonant zvinhu pakakwirira.

Vagadziri vanofanirwa kudzikisa kuburikidza nekuchinja munzira dzekumhanya-mhanya uye kushandisa microvias kana kuvigwa vias kudzikisa parasitics. Kana kuburikidza ne vias zvisingadzivisiki, shandisa back-drilling kubvisa ma stubs asina kushandiswa. Kuisa pasi vias pedyo nechiratidzo vias kunogonawo kubatsira kuchengetedza impedance chiyero uye kudzvinyirira EMI mwaranzi.

5. Kusarudzwa Kwezvinhu Zvisina Kufanira

Sarudzo yemidziyo inoita basa rekuita mupamusoro frequency PCB dhizaini. Kushandisa yakajairwa FR-4 yemicrowave kana RF zvikumbiro ndeimwe yemhosho dzakakomba dzinoitwa nemainjiniya. FR-4's yakakwira uye isina kugadzikana kurasikirwa kwedielectric pane yakakwira frequencies inokonzeresa kudzika kwechiratidzo uye kuchinja kwechikamu.

Pane kudaro, sarudza zvinhu zvakaita selaminate ine low-loss, Taconic RF-35, kana Panasonic Megtron 6, iyo inopa dielectric loss yakaderera uye Dk inowirirana pamusoro pehuwandu hwakawanda hwema frequency. Uyezve, kufananidza prepreg nezvinhu zvepakati mukati me multilayer stackups kunodzivirira kusagadzikana kwe dielectric. Gara uchiongorora hunhu hwezvinhu nemugadziri wePCB yako kuti uve nechokwadi chekuti mashandiro emagetsi uye kugona kugadzira zvinoenderana nechinangwa chekugadzira.

6. EMI isina kukwana uye Crosstalk Control

Electromagnetic interference (EMI) uye crosstalk nyaya dzinowanzo simuka kana yakakwira-frequency traces yakafambiswa zvakanyanya kana kana masiginecha akaturikidzana pasina kuparadzaniswa kwakakodzera. Kusakwana kwenzvimbo kunokonzeresa kubatana pakati pemitsetse iri padyo, kuderera kwechiratidzo chemhando uye kuita kwekuteerera.

Kuti udzivise nyaya idzi, chengetedza nzvimbo yakaringana pakati pekutevedzana, isa mitsetse yevarindi pazvinenge zvichidiwa, uye shandisa nemafenzi akatenderedza analog kana RF maseketi. Ita shuwa kuti nzira dzakakosha dzepamusoro-soro dzinodzivirirwa nendege dzepasi dzinoramba dzichideredza radiation uye kubatwa. Maturusi ekuenzanisa akadai seHFSS kana SIwave anogona kubatsira kuona kubatanidzwa kwemunda uye kukwenenzvera PCB geometry isati yagadzirwa.

7. Kuregeredza Zvipingamupinyi Zvekugadzira

Dhizaini inotaridzika zvakanaka pachikirini inogona kuramba ichikundikana mukugadzirwa kana miganho yekugadzira ikasatariswa. Zvikanganiso zvakawanda zvePCB zvinokonzerwa nekusateerera mitemo yefekitori, saizi shoma dzekuboorera, kana miganho yekupindira inogoneka. Zvidimbu zvakapfava zvakanyanya, mipata midiki, kana zvinhu zvekunze zvinogona kuwedzera mutengo uye kuderedza goho.

Mhinduro ndeyekutanga kubatana nePCB yekugadzira yako yekusimbisa yechokwadi dhizaini mitemo. Kurukurai akaturikidzana, ukobvu hwemhangura, dielectric spacing, uye zvimwe zvezvinhu zvinotsigira kushanda kwemagetsi uye kugadzirwa kwakawanda. Kubatanidza manufacturability padanho rekugadzira inochengetedza inodhura rework uye inovimbisa kuenderana kwepamusoro-frequency kuita muzvigadzirwa zvekupedzisira.

8. Kushaya Simulation uye Testing

Kusvetuka-pre-layout simulation uye post-yekugadzira bvunzo itarisiro yakakosha mune yakakwira frequency PCB dhizaini. Pasina simulation, vagadziri havagone kufanotaura kuti parasitics, trace geometry, kana kusiyanisa kwezvinhu zvichakanganisa sei-chaiyo-yepasi chiratidzo kutendeseka.

Shandisa 3D EM simulation maturusi kusimbisa impedance, crosstalk, uye fungidziro maitiro asati agadzirwa. Mushure megungano, shandisa S-parameter kuyedzwa uye TDR zviyero kuti uone kuita chaiko. Kubhururuka-probe kana network analyzer kuyedzwa kunopa nzwisiso yakakosha mukuenderana kwemasaini pamabhechi ekugadzira. Nguva dzose kusimbiswa hakungodziviriri kugadzirisa zvakare kunodhura asiwo kunovimbisa kuvimbika kwenguva refu mumasisitimu ekumhanya.

mhedziso

Yakakwira frequency PCB dhizaini zvikanganiso zvinowanzobva mukutarisisa kudiki kunotungamira kumatambudziko makuru ekuita-isina kupindirana, kusimba kwepasi, kushata nzira, zvinhu zvisina kukodzera, uye kushomeka kwekuziva kwekugadzira. Kugadzirisa matambudziko aya kunoda musanganiswa wekuraira kweinjiniya, simulation, uye kubatana pakati pezvikwata zvekugadzira nekugadzira.

Highleap Electronics Injiniya Yakanakira

• Unyanzvi hwezvinhu - Hunyanzvi mukubata zvinhu zvepamusoro zvakaita se laminate yakaderera-kurasikirwa, Taconic, uye Megtron kuti ishande zvakanaka.

• Kugadzira Nemazvo - Kugadzirwa kweimpedance inodzorwa, microvias dzakacherwa nelaser, uye ma stackups akawanda ane kurasikirwa kwakaderera.

• Kubatana kweDFM - Rutsigiro rwekutanga rweinjiniya kuti marongero ako aenderane nekugadzirwa kwakanaka uye goho rakanaka.

• Kuedzwa Kwakakwana - Kusimbiswa kwe impedance mukati meimba, kuyedzwa kwe flying-probe, uye kusimbiswa kwekuvimbika kwechiratidzo chemagadzirirwo akakosha.

KuHighleap Electronics, tinotsigira mainjiniya mukushandura pfungwa dzePCB dzinofambiswa nemhepo yakawanda kuita mhinduro dzakagadzirira kugadzirwa. Chikwata chedu chinoona kuti dhizaini yega yega—ingave ye5G, radar, kana high-speed computing—inosangana nemirairo yakasimba yekuvimbika uye kuvimbika. Taura nesu nhasi kuti mukurukure nezvepurojekiti yenyu inotevera yePCB inofambiswa nemhepo yakawanda uye muwane kushanda kwakanaka kubva pakugadzira kusvika pakugadzira zvinhu zvakawanda.