Chii chinonzi High-Frequency PCB

High-frequency PCBs kazhinji inopa huwandu hwe500MHz kusvika 2 GHz, iyo inogona kusangana nezvinodiwa zvekumhanya-mhanya PCB dhizaini, microwave, radiofrequency uye mobile application. Kana iyo frequency yakakwira kupfuura 1 GHz, tinogona kuitsanangura seyakakwira frequency.

Nhasi, kuoma kwezvinhu zvemagetsi uye maswichi kunoramba kuchiwedzera, uye kukurumidza kuyerera kwechiratidzo kunodiwa kupfuura zvinowanzoitika. Naizvozvo, yakakwirira yekufambisa frequency inodiwa. Kana uchibatanidza zvakakosha zvechiratidzo zvinodikanwa muzvikamu zvemagetsi uye zvigadzirwa, yakakwira-frequency PCB ine zvakawanda zvakanaka, senge hunyanzvi hwekuita, kukurumidza kukurumidza, kuderera, uye kugara kwedielectric kugara.

High-frequency PCB - zvakakosha zvinhu

Zvishandiso zvakakosha zvinodiwa kuti uone iyo yakakwira frequency inopihwa nerudzi urwu rwakadhindwa redunhu bhodhi, Nekuti chero shanduko yemvumo yavo inogona kukanganisa impedance yePCBs. Vazhinji vagadziri vePCB vanosarudza Rogers dielectric zvinhu nekuti ine yakaderera dielectric kurasikirwa, yakaderera chiratidzo kurasikirwa, yakaderera mutengo wekugadzira wedunhu, uye inonyanya kukodzera kukurumidza kutendeuka prototype application pakati pezvimwe zvinhu.

Yakakwira Frequency PCB Kurongeka Unyanzvi

1. Izvo zvishoma zvinotungamira pakati pe-high-speed electronic device pini akabhenda zviri nani

Iyo inotungamirira tambo ye-high-frequency circuit wiring inonyanya mutsara wakazara, unoda kuchinjwa, uye unogona kupetwa nemutsara we 45-degree kana denderedzwa arc. Ichi chinodiwa chinongoshandiswa kuvandudza simba rekugadzirisa remhangura yemhangura mumhepo yakaderera-frequency circuit, uye mu-high-frequency circuit, zvinyorwa zvinogutsikana. Chimwe chinodiwa kudzikisa kutapurirana kwekunze uye kuwirirana kwekubatana kwemasaini epamusoro frequency.

2. Iyo yakakwirira frequency redunhu mudziyo pakati pepini akaturikidzana zvishoma sezvinobvira

Izvo zvinodaidzwa kuti "zvishoma kuchinjika pakati pematanho ekutungamira zviri nani" zvinoreva kuti mashoma kuburikidza nekushandiswa muchikamu chekubatanidza maitiro, zviri nani. A via anogona kuunza yakagovaniswa capacitance ingangoita 0.5pF, uye kuderedza nhamba ye via kunogona kuwedzera zvakanyanya kumhanya uye kuderedza mukana wekukanganisa kwedata.

3. Inotungamira pakati pe-high-frequency circuit device pini ipfupi sezvinobvira

Kupenya kwekupenya kwechiratidzo kunoenzana nehurefu hwekutevera kwemutsara wechiratidzo. Iyo yakareba-yepamusoro-frequency chiratidzo chinotungamira, zviri nyore kuroora kune chikamu chiri padyo nacho, saka kune wachi senge masaini, crystal, DDR data, High-frequency siginecha mitsetse yakadai seLVDS mitsetse, USB mitsetse, uye HDMI mitsetse. dzinodikanwa kuva pfupi sezvinobvira.

4. Teerera kune "crosstalk" inounzwa nechiratidzo mutsara uye pfupi nhambwe yakafanana mutsara

Iwo Matambudziko Matatu Makuru eKumhanyisa PCB Dhizaini

Paunenge uchishanda pane yakakura kumhanya PCB dhizaini, pane toni yenyaya dzauchasangana nadzo munzira yakanangana nekuwana masaini ako kudyidzana kubva papoint A kusvika kunongedzo B. Asi pane zvese, zvinhu zvitatu zvepamusoro zvinokunetsa kuziva ndezvekuti:

Nguva. Mune mamwe mazwi, masaini ese ari paPCB dhizaini yako anosvika panguva yakakodzera maererano nemamwe masaini? Ese masaini ekumhanya kwazvo padhizaini yako anodzorwa newachi, uye kana nguva yako yakadzimwa, saka unenge uchigamuchira yakaora data.

Kuperera. Mune mamwe mazwi, masaini ako anotaridzika sezvaanofanira kuita here kana asvika kwaanosvika kwaanosvika? Kana vakasadaro, zvinoreva kuti chiratidzo chako chingangove chakasangana nekukanganisika munzira izvo zvakakanganisa kutendeseka kwayo.

Noise. Mune mamwe mazwi, masaini ako akasangana chero ipi neipi yekuvhiringidza parwendo rwavo kubva kune inofambisa kuenda kune inogamuchira? Yese PCB inoburitsa rumwe rudzi rweruzha, asi kana ruzha rwakawandisa rwuripo, ipapo unowedzera mukana wehuori hwedata.

Zvino, nhau dzakanaka ndedzekuti aya Matambudziko Matatu Makuru aungasangana nawo pakumhanya kwePCB dhizaini anogona kugadziridzwa ese aya Makuru Matatu Solutions:

Impedance. Kuve neiyo impedance chaiyo pakati pemutakuri wako uye inogamuchira kuchave nemhedzisiro yakananga pamhando uye kuvimbika kwezviratidzo zvako. Izvi zvichakanganisawo kuti masaini ako ari kunzwa sei kune ruzha.

Kufananidza. Kufananidza hurefu hwemateki maviri akabatanidzwa kunovimbisa kuti zviteshi zvako zvinosvika panguva imwe chete uye mukuwirirana nemareti ewachi yako. Kufananidza mhinduro yakakosha yekutarisa yeDDR, SATA, PCI Express, HDMI, uye USB zvikumbiro.

Spacing. Iyo iri padyo nemateki ako kune mumwe nemumwe, ivo vanonyanya kukonzeresa ruzha uye mamwe maitiro ekukanganiswa kwechiratidzo. Nekusaisa zviteshi zvako padhuze kupfuura zvavanofanira kunge vari, unoderedza huwandu hweruzha pabhodhi rako.

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