Nekuda kwehukuru hudiki uye saizi, pane chero pasina iripo yakadhindwa wedunhu zviyero zvemutengo unokura weIOUS. Tichifunga zviyero izvi, taifanira kuvimba neruzivo uye chiitiko chekugadzira chakadzidziswa mukuvandudza kwebhodhi uye kufunga nezve maitiro ekuzvishandisa kune akasiyana matambudziko. Pane nzvimbo nhatu dzinoda kutarisisa kwedu. Ivo vari: Circumd Board pamusoro zvinhu, RF / microwave dhizaini uye rf kutapurudzira mitsara.

PCB zvinhu

"PCB" kazhinji ine laminates, iyo inogona kugadzirwa neye fiber-yakasimbiswa epoxy ( Zvinyorwa zvekusimbisa pakati pematemo akasiyana zvinonzi prepreg.

Zvishandiso zvinosemerwa zvinoda kuvimbika zvakanyanya, saka kana PCB Vagadziri vakatarisana nesarudzo yekushandisa Fr4 (iyo inobata-inobudirira PCB yekugadzira zvinhu) kana kupfuura zvinhu zvakapfuura, izvi zvichave dambudziko.

Kana ikabhable PCB application inoda yakakwira-kumhanya, yakakwira-frequency zvinhu, Fr4 inogona kunge isiri sarudzo yakanyanya kunaka. Iyo Dilelectric inogara (DK) yeFR4 ndeye 4,5

"Iyo dielectric inogara ichiramba ichireva huwandu hwehuwandu hwekugona kana simba rekuita kuti vafambe." Zviri nani

Mumamiriro ezvinhu akajairwa, nhamba yePCB yemaratidziro emidziyo yakasarudzika kubva pamakumi mana kusvika masere matema. Iyo nheyo yekuvakwa kwerudo ndeyekuti kana iri 8-layer PCB, inofanira kukwanisa kupa nzvimbo dzakaringana uye magetsi maratari uye sandwich iro rairo riya. Nenzira iyi, iyo ripple mhedzisiro muCrosstalk inogona kuchengetwa kusvika kune mashoma uye electromagnetic kupindira (EMI) inogona kuderedzwa zvakanyanya.

MuDhokwadi Board Lyunt Design Stage, chirongwa chekutungamira ndechekuti kazhinji kuisa nzvimbo yakakura yepasi padyo neSimba rekuparadzira simba. Izvi zvinogona kuumba yakaderera kwazvo ripples mhedzisiro, uye ruzha urongwa runogona zvakare kuderedzwa kusvika kune zero. Izvi zvinonyanya kukosha kune redhiyo redhiyo subsystem.

Kuenzaniswa neRogers Zvinyorwa, Fr4 ine yakakwira kusagadzikana chinhu (df), kunyanya pakupedzisira. Kune yepamusoro performance fr4 laminates, iyo DF kukosha ndeye 0.002, iyo iri kurongeka kwehukuru hwakanaka kupfuura zvakajairika Fr4. Nekudaro, ma rogers 'stack anongova 0.001 kana zvishoma. Kana Fr4 zvinhu zvinoshandiswa kune yakakwira frequency application, pachave nemusiyano wakakosha mukupererwa. Kuisa kurasikirwa kunotsanangurwa sekurasikirwa kwesimba kwechiratidzo kubva kune imwe nzvimbo kusvika pachinongedzera kana uchishandisa fr4, roger kana zvimwe zvinhu.

Gadzira Matambudziko

Inorable PCB inoda kusimba kudzora kudzora. Ichi chinhu chakakosha kune zvishandiso zvinoshandiswa. Kukanganiswa kunoenderana kunogona kuburitsa kuchenesa chiratidzo chiratidzo. Pakutanga, iyo yakajairwa kushivirira chiratidzo chekutakura matunhu aive ± 10%. Ichi chiratidzo chiri pachena hachina kunaka zvakakwana kune yanhasi yakakwira-frequency uye yakakwirira-maune maune. Chinodiwa chiripo chiri × 7%, uye mune zvimwe zviitiko kunyangwe ± 5% kana zvishoma. Iyi paramende uye mamwe mimwe misiyano ichakanganisa zvakakomba kugadzirwa kweiyi yePCBs ine kunyanya kudzora kudzora, nekudaro kumisikidza huwandu hwemabhizinesi anogona kuvapa.

Iyo Dilelectric Kugara Kushivirira Kwemavhidhiyo akagadzirwa neRogers UHF Zvigadzirwa zvinowanzochengetwa pa】 2%, uye zvimwe zvigadzirwa zvinogona kunyange kusvika】 1%. Mukupesana, iyo dielectric yekugara ichishivirira yeiyo Fr4 Laminate yakakwira se10%. Naizvozvo, enzanisa izvi zviviri zvinhu zvinogona kuwanikwa kuti kurasikirwa kwema rogerstsion kunonyanya kuderera. Kuenzaniswa neyechinyakare fr4 zvinhu, kurasikirwa kwekutapurirana uye kurasikirwa kwekuisa kweiyo rogers stack hafu yakaderera.

Muzhinji, mutengo ndirwo runonyanya kukosha. Nekudaro, rogers inogona kupa yakaderera-kurasikirwa yakakwirira-frequency leminate performance pane inogamuchirika mutengo. Zvekushandisa zvekutengeserana, rogers dzinogona kuitwa mune hybrid PCB ine epoxy-based fr4, mamwe matanda iya anoshandisa zvinyorwa zve rogers, uye zvimwe zviyero zvinoshandisa Fr4.

Kana uchisarudza ma rogers stack, frequency ndiyo yekutanga kufunga. Kana iyo frequency inodarika 500mhz, PCB Vagadziri vanowanzo sarudza Rogers zvinhu, kunyanya kweRF / microwave matinji, nekuti izvi zvinokonzerwa nekumusoro kutarisirwa kwakadzorwa zvakanyatso kudzorwa nekukundwa.

Kuenzaniswa neFr4 Zvinyorwa, Rogers zvinhu zvinogona zvakare kupa zvakadzika didelectric kurasikirwa kwekurasikirwa, uye yayo dielectric inogara yakagadzikana mune yakawandisa frequency. Uye zvakare, rogers zvinhu zvinogona kupa iyo yakakodzera yakaderera yekuisa kurasikirwa kwekuita kwekuita zvinodiwa neakakwirira frequency kushanda.

Iyo coefficient yekuwedzera kwekuwedzera (cte) ye rogers 4000 Series zvinhu ine yakanakisa dimensional kugadzikana. Izvi zvinoreva kuti izvo zvinoenzaniswa neFr4, apo PCB inotonhora, inopisa kwazvo kutengesa maClours

Panyaya yeKusanganiswa Spacking, zviri nyore kushandisa tekinoroji yakajairika yekusanganisa ma rogers uye yakakwirira-mashandiro fr4 pamwe chete, saka zviri nyore kuwana goho rekugadzira. Iwo ma rogers anosunga haadi chinhu chakakosha kuburikidza nekugadzirira maitiro.

Common Fr4 haikwanise Kuvimbika Kwemagetsi Ekuita, asi High-Perform Zvishandiso Zvekuvimbika

Rf / microwave dhizaini kufunga

Tortable Technology uye Bluetooth yave yakaisa nzira yeRF / microwave application mune inoshandiswa nemidziyo. Nhasi nguva yanhasi iri kuita zvakawanda uye zvakanyanya simba. Makore mashoma apfuura, yakanyanya kukwira frequency (VHF) yakatsanangurwa se 2GHZ ~ 3GHZ. Asi ikozvino tinogona kuona Ultra-yakakwira frequency (UHF) zvikumbiro kubva ku10GHZ kusvika 25GHZ.

Naizvozvo, nekuda kwePCB inosemesa, rf chikamu cheRF chinoda kutarisisa kune vanoshandisa nyaya, uye zviratidzo zvinofanirwa kuparadzaniswa zvakasiyana, uye zvinongedzo zvekuti zvinounza masaini edzimhosva zvinofanirwa kuitirwa pasi. Dzimwe pfungwa dzinosanganisira: Kupa chiremba wepfupi, zvakaringana zvekushongedza mapepa, kugadzirisa, uye kugadzira mutsara wekutapurika uye kudzoka mutsara kuti uwedzere kuenzana.

Bypass filter inogona kudzvinyirira iyo ripple simba rekutarisa uye crosstalk. Decupurling Capacitors inoda kuiswa padhuze neyekushandisa pini inotakura masaga emasimba.

High-speed transmission lines and signal circuits require a ground layer to be placed between the power layer signals to smooth the jitter generated by noise signals. Pamusangano wepamusoro unomhanya, mishonga madiki enjedzo inokonzeresa kusagadzikana uye kugashira kwemasaini, zvichikonzera kukanganisa. Naizvozvo, kutarisisa kwakakosha kunofanirwa kubhadharwa kune dambudziko rekufananidza zvine chekuita neyenyenyere frequency chiratidzo, nekuti radio frequency chiratidzo chine kumhanya kwakanyanya uye kushivirira kwakasimba.

RF Transment Tripment Like inoda kudzora kutapwa kuitira kuti kuendesa RF Signals kubva kune yakatarwa ic substrate kune iyo PCB. Iyi mitsara yekutumira inogona kuiswa pane yekunze denderedzwa, kumusoro kwepamusoro, uye pasi ratidziro, kana inogona kugadzirwa mune yepakati layer.

Nzira dzinoshandiswa panguva yePCB RF dhizaini microsttrip mutsara, kuyerera strip mutsetse, coplanar waveguide kana pasi. Iyo microstrop mutsara ine urefu hwakatemerwa nesimbi kana kuti inoteedzera uye iyo nyika yese yepasi kana chikamu chevhu yepasi pepa zvakananga pazasi payo. Hunhu hwekutsigirwa mune general microstrip mutsara chimiro kubva pa50ω kusvika ku55 matωω.

Kuyangarara stripline ndeimwe nzira yekuda uye kudzvinyirira ruzha. Mutsetse uyu unosanganisira wakasarudzika-upamhi hwekuputira pane yemukati denderedzwa uye ndege yakakura yepasi kumusoro uye pazasi iyo centre conductor. Iyo yepasi ndege yakasungirirwa pakati penzvimbo yemagetsi, saka inogona kupa inoshanda kwazvo kugadzirisa. Iyi ndiyo nzira yavanofarira yeyarable PCB RF chiratidzo Wiring.

Coplanar waveguide inogona kupa zviri nani kuzviparadzanisa pedyo neRF wedunhu uye dunhu rinofanira kuiswa padyo. Iyi yepakati ine cent conductor uye ndege dzinovhurwa kune rumwe rutivi kana pazasi. Nzira yakanaka yekuendesa redhiyo redhiyo masaini ndeyekumisa mitsara yemitsetse kana coplanar waveguides. Idzi nzira mbiri dzinogona kupa zviri nani kuzviparadzanisa pakati pechiratidzo uye rf track.

Zvinokurudzirwa kushandisa iyo inonzi "kuburikidza nefenzi" pamativi ese ecoplanar waveguide. Iyi nzira inogona kupa mutsara wevhu vias pane imwe neimwe yesimbi pasi ndege yemukati metender. Iyo huru trace ichimhanya pakati ine fenzi kudivi rega, nokudaro ichipa pfupi yekudzoka yazvino pasi pazasi. Iyi nzira inogona kuderedza ruzha ruzha inosanganiswa neiyo yakakwira ripple mhedzisiro yeRF chiratidzo. Iyo Dilelectric inogara ichingoita seyakavapo

Mune zvimwe zvigadzirwa zvinoshandisa ndege yepasi, bofu vias inogona kushandiswa kuvandudza mashandiro ekugadzirisa kwesimba uye kupa nzira shunt kubva kune iyo mudziyo kuenda pasi. Iyo nzira yetsiva pasi inogona kupfupisa kureba kweiyo via. Izvi zvinogona kuzadzisa zviviri zvinangwa: Iwe hausi kungogadzira shunzi kana ivhu, asi zvakare kudzora iyo yekuendesa kure kwemidziyo ine nzvimbo diki, iyo yakakosha RF dhizaini.