High Frequency PCB: Incazelo, Izinzuzo, kanye nezicelo

Iyini i-High Frequency PCB?

Incazelo Nenhloso

I-PCB evame ukusetshenziswa kakhulu iyibhodi yesekethe ekhethekile eyenzelwe ukusebenza kumafrikhwensi avame ukudlula i-1GHz, evame ukusetshenziswa kumafrikhwensi omsakazo kanye nezinhlelo zokusebenza ze-microwave. Lawa mabhodi aklanywe ngendlela yokuthi aphathe ukudluliswa kwesignali yesivinini esikhulu ngokulahlekelwa okuncane kanye nokuphambuka, okwenza abaluleke kakhulu ezinhlelweni zokuxhumana zesimanje kanye ne-elekthronikhi ethuthukisiwe.

Izimpawu Zento Ebalulekile

Izici ezichazayo zama -PCB asebenzisa imvamisa ephezulu zifaka phakathi izinto ezihlala njalo ze-dielectric eziphansi, izici zokusaphazeka eziphansi, kanye nokusebenza kahle kwesignali okumangalisayo. Ngokungafani namabhodi ajwayelekile e-FR-4, ama-PCB asebenzisa imvamisa ephezulu asebenzisa izinto ezisezingeni eliphezulu ezifana nama-laminate asekelwe ku-PTFE avela kubakhiqizi abafana ne-laminate ekhethekile ephansi yokulahlekelwa, i-Taconic, ne-Arlon. Ngezinhlelo zokusebenza ezibucayi, ama-stackup e-hybrid ahlanganisa izinto ezisebenzisa imvamisa ephezulu nezendlalelo ezivamile ze-FR-4 anikeza indlela elinganiselayo phakathi kokusebenza kanye nemikhawulo yesabelomali.

Ukuthi Ama-PCB Emvamisa Ephakeme Ahluke Kangakanani Kumabhodi Avamile

Umehluko oyisisekelo phakathi kwama-PCB avamile kanye namabhodi avamile ulele endleleni aphatha ngayo ukusakazwa kwamagagasi kagesi. Kumafrikhwensi angaphezu kuka-1GHz, ngisho nokungahambisani okuncane kwempahla noma ukungapheleli kwedizayini kungabangela ukuwohloka okukhulu kwesignali, ukushintsha kwesigaba, nokungahambisani kahle kokuphazamiseka okuphazamisa ukusebenza kwesekethe.

Izimpawu Ezisemqoka zama-PCB Okuvama Kakhulu

I-Dielectric Constant Stability

I -dielectric constant inquma ukuthi amagagasi kagesi asakazeka kanjani nge-PCB substrate. Izinto ze-PCB ezivame kakhulu zigcina amanani e-Dk ahambisanayo kuwo wonke amazinga okushisa nama-frequency ahlukahlukene, okuqinisekisa ubudlelwano besigaba sesiginali obubikezelwayo. Izakhiwo ze-dielectric ezizinzile zibalulekile ezinhlelweni zokusebenza ezidinga isikhathi esinembile kanye nokuvumelanisa, njenge-phased array antennas kanye ne-interfaces yedijithali esheshayo.

I-Disipation Factor kanye Nokulahlekelwa Kwesiginali

Isici sokushabalalisa sithinta ngokuqondile ukuncishiswa kwesignali kuma-PCB avamile. Izinto ezinamavelu e-Df aphansi zinciphisa ukulahlekelwa kwamandla njengoba amasignali enqamula ibhodi, alondoloza amandla esignali futhi enciphisa isidingo sokukhulisa. Ama-laminates amafrikhwensi aphezulu ngokuvamile abonisa amanani e-Df angaphansi kuka-0.004, enza ukusebenza kahle kakhulu kokusebenza okujwayelekile okungadlula u-0.020.

Ukufanisa Ukwandiswa Okushisayo

I-coefficient yokuhambisana kokunwetshwa okushisayo phakathi kwezendlalelo zethusi nezinto ze-substrate kuvimbela ukucindezeleka komshini emibuthanweni ye-PCB ye-multilayer high frequency. Amanani e-CTE angafani angabangela ukubola, ukuqhekeka kwemigodi, kanye nokwehluleka ukwethembeka ngesikhathi sokuhamba ngebhayisikili. Izinto ezithuthukisiwe zemvamisa ephezulu zenzelwe ukufanisa eduze izici zokunwetshwa kokushisa kwethusi.

I-Copper Surface Roughness Control

Kumafrikhwensi e-microwave, ubulukhuni bendawo yethusi buba nomthelela omkhulu ekulahlekeni kwe-conductor. Ukwenziwa kwe-PCB okuyimvamisa ephezulu kusebenzisa ama-foil ekhopha anephrofayili ephansi noma ithusi elihlanjululwe ukuze kuncishiswe ukulahleka komphumela wesikhumba. Ukunciphisa ubulukhuni obuphezulu ukusuka kumaphrofayela ajwayelekile kuye kumaphrofayili aphansi kakhulu kunganciphisa ukulahlekelwa kokufaka ngamaphesenti angamashumi amathathu kumafrikhwensi angaphezu kuka-10GHz.

Precision Impedans Control

Ukuthola ukubekezelelana okuqinile kwe-impedance kudinga ukulawulwa okunembile kwe-trace geometry kanye nokuqina kwe-dielectric ekukhiqizeni i-PCB eyimvamisa ephezulu. Izinhlelo zokusebenza zesimanje zidinga ukunemba kokuphazamiseka ngaphakathi kokuhlanganisa noma susa amaphesenti amahlanu noma okungcono, okudinga izilawuli zenqubo ethuthukisiwe nezinto ezinezici zikagesi ezingaguquki phakathi nokukhiqizwa.

Izinzuzo Zokusebenzisa I-High Frequency PCBs

Ukudluliswa Kwesiginali Okuzinzile

Ama-PCB emvamisa ephezulu aletha ubuqotho besignali ephakeme ngokulahleka okuncishisiwe, i-crosstalk encane, nezici zomsindo ophansi. Izinto eziyisipesheli kanye nezinqubo zokukhiqiza ezilawulwayo ziqinisekisa ukuthi ikhwalithi yesiginali ihlala ingashintshile ngisho nakumafrikhwensi okusebenza e-multi-gigahertz, okuvumela ukudluliswa kwedatha okuthembekile ezinhlelweni ezifunwayo.

Excellent Impedans Control

Ukugcina i-impedance enembayo kubalulekile ekufaniseni izimpondo, izikhulisamazwi, nemigqa yokudlulisela kumasekhethi e-RF nama-microwave. Imiklamo ye-PCB yefrikhwensi ephezulu ihlanganisa imikhondo ye-impedance elawulwayo egcina ukusebenza kahle kokudluliswa kwamandla esignali futhi inciphise ukubonakaliswa. Leli khono libalulekile ezinhlelweni zokuxhumana okungenantambo lapho ukungahambisani kahle kuthinta ngokuqondile ububanzi namazinga edatha.

Ukuzinza Okushisayo

Ama-PCB emvamisa ephezulu agcina ukusebenza kukagesi okungaguquki kuwo wonke amazinga okushisa abanzi nangaphansi kwezimo zamandla aphezulu. Izinto ezithuthukisiwe ze-substrate zimelana noshintsho lwesakhiwo obelungabangela ukukhukhuleka, ukuhluka kwe-impedance, noma ukulahlekelwa okwandisiwe. Lokhu kuzinza okushisayo kuqinisekisa ukwethembeka kwesikhathi eside kukho kokubili imishini yasendlini kanye nezindawo zangaphandle ezinokhahlo.

Ukuthembela Okuthuthukile

Inhlanganisela yama-substrates azinzile ngomshini, izakhiwo ezihambisanayo zokunweba ezishisayo, nezinto ezimelana nomswakama kunomthelela ekwethembekeni okukhethekile kuma-PCB avamile. Lawa mabhodi amelana nezinkulungwane zemijikelezo yokushisa kanye neminyaka yokusebenza okuqhubekayo ngaphandle kokuwohloka kokusebenza, ukunciphisa izindleko zokunakekela kanye nokuphelelwa yisikhathi kwesistimu.

Design Ukuvumelana nezimo

Ubuchwepheshe be-PCB obuvama kakhulu buhlanganisa ngaphandle komthungo nezakhiwo zokuxhumanisa okuminyanisa kakhulu kanye nezitaki ezixutshiwe. Onjiniyela bangahlanganisa izendlalelo zemvamisa ephezulu nezinto ezijwayelekile kumadizayini ayingxube, bakhulise izindleko kuyilapho begcina ukusebenza kwe-RF okubalulekile ezindaweni ezithile zamabhodi. Lokhu kuvumelana nezimo kuvumela izakhiwo zesistimu eziyinkimbinkimbi ezilinganisa izidingo zokusebenza nezomnotho zokukhiqiza.

Izinhlelo zokusebenza ze-High Frequency PCBs

Izisetshenziswa Zezokuxhumana

Ingqalasizinda engenazintambo yesizukulwane sesihlanu incike kakhulu kuma-PCB avamile kumamojula wesiteshi sesisekelo, ama-antenna amakhulu we-MIMO, kanye namanethiwekhi okukhanya kwamagagasi angamamilimitha. Lawa mabhodi anika amandla amaza okuphatha we-gigahertz amaningi kanye nama-bandwidths abanzi achaza ukusebenza kwe-5G. Izixhumanisi ze-Microwave backhaul kanye nokuthunyelwa kwamaseli amancane nakho kuncike kubuchwepheshe be-PCB obuvama kakhulu ukuze kugcinwe ikhwalithi yesiginali phezu kwamabhendi e-spectrum anelayisensi.

I-Automotive Radar Systems

Amasistimu okusiza abashayeli athuthukisiwe nezinkundla zezimoto ezizimele ahlanganisa ama-PCB emvamisa ephezulu kumamojula we-radar asebenza kumabhendi angu-24GHz kanye ne-77GHz. Lawa mabhodi acubungula imibukiso evela ezintweni ezizungezile ukuze anike amandla ukugwema ukungqubuzana, ukulawulwa kohambo olushintshayo, nosizo lokupaka. Indawo yezimoto idinga ama-PCB emvamisa ephezulu amelana nezinga lokushisa elidlulele, ukudlidliza, nomswakama kuyilapho egcina ukusebenza kwegagasi eliyimilimitha phakathi nesikhathi sokusebenza kwemoto.

Amadivayisi Omfanekiso Wezokwelapha

Amasistimu we-imaging resonance magnetic asebenzisa ama-PCB emvamisa ephezulu kumakhoyili e-RF namamojula okwamukela okudlulisa akhiqiza futhi abone amasiginali wenuzi kazibuthe. Izicelo zokwelapha ezihlanganisa amasistimu okukhipha amandla e-RF zidinga ukulethwa kwamandla okunembile kumafrikhwensi lapho amabhodi esekethe ajwayelekile azokwethula ukulahlekelwa okungamukeleki. Ubuchwepheshe be-PCB obuvama kakhulu buvumela ukwethembeka kwesignali okudingekayo ukuze kube nokunemba kokuxilonga nokusebenza ngempumelelo kokwelashwa.

Aerospace nokuvikela

Imithwalo ekhokhelwayo yokuxhumana ngesathelayithi, amasistimu e-radar, kanye nempahla yempi kagesi isebenza kuwo wonke ama-microwave nama-millimeter-wave frequency ranges lapho ama-PCB avamile abalulekile. Lezi zinhlelo zokusebenza azidingi kuphela ukusebenza kwe-RF okuhle kakhulu kodwa futhi nokuthembeka ezindaweni ezishisa izikhotha, amazinga okushisa adlulele, nezimo ze-vacuum. Amasistimu okuvikela ahlanganisa ama-PCB avamile kuma-missile aqondiswayo, ama-radar ahlelwe ngezigaba asebenzayo, kanye nezixhumanisi zokuxhumana ezivikelekile.

I-High-Speed ​​Computing kanye Nenethiwekhi

Ukushintshwa kwesikhungo sedatha , ama-router angumongo, kanye namapulatifomu ekhompyutha asebenza kahle kakhulu asunduza amazinga esignali angaphezu kuka-100Gbps ngomzila ngamunye, okudinga imiklamo ye-PCB evame kakhulu ephatha amazinga onqenqema lwedijithali kanye nama-frequency ewashi afakiwe. Ama-backplane interconnects kanye nama-interface e-optical module adinga izici zokulahlekelwa okuphansi kanye ne-impedance elawulwayo enikezwa yizinto ezivame kakhulu, okuvumela ukwandiswa kwe-bandwidth okudingwa amanethiwekhi anamuhla.

Ukukhetha Okubalulekile Okulungile kwe-PCB Yemvamisa Ephakeme

Ukukhethwa kwezinto ngokuyisisekelo kunquma ukusebenza kwe-PCB okuyimvamisa ephezulu kanye nezindleko. I-substrate ngayinye inikezela ngebhalansi ehlukile phakathi kokuzinza kwe-dielectric, izici zokulahlekelwa, nokwenza kube lula:

• i-laminate ekhethekile ephansi yokulahlekelwa - Ukuzinza kwe-dielectric okulinganiselwe kanye nokusebenza kahle kwezindleko, kuhambisana nezinqubo ezijwayelekile ze-PCB.
• i-laminate ekhethekile ephansi yokulahlekelwa - Ukulahleka kwe-dielectric okuphansi, ilungele ukudinga amasekethe e-microwave ne-RF.
• I-Taconic RF-35 - Ukulahlekelwa okuphansi kakhulu nokusebenza okungaguquguquki kukho konke ukuhlukahluka kwezinga lokushisa.
• I-Panasonic Megtron 6 – Idizayinelwe amasistimu edijithali anesivinini esikhulu adinga ukulawula okuqinile kuka-Dk kanye nokutsheka kwesiginali ephansi.

Ukuhwebelana phakathi kwezindleko nokusebenza kuncike kubuningi bokusebenza okuqondiwe kanye nomkhawulokudonsa wohlelo lokusebenza:

• Ngaphansi kuka-6 GHz – I-FR-4 evame kakhulu noma i-laminate ekhethekile ephansi elahlekayo ivame ukunikeza ukusebenza okwanele ngentengo ephansi.
• Ngaphezulu kwe-10 GHz – I-Premium PTFE-based noma i-ultra-low-loss laminates iba semqoka ukuze kuncishiswe ukulahleka kokufakwa nomsindo.

Ukukhethwa kwezinto ezibonakalayo kufanele futhi kucabangele ukuhambisana kokukhiqiza kanye nokulungela ukuhlanganisa:

• Izithiyo zokwenziwa - Amanye ama-substrates adinga ukubhola okukhethekile, umzila, nokulungiswa kwendawo.
• Amandla omphakeli - Akubona bonke abakhiqizi be-PCB abahlomele ukuphatha izinto ezithuthukisiwe ze-RF noma izitaki eziyingxube.
• Ukuxhumanisa kusenesikhathi - Ukuxoxa ngezidingo zempahla nezinqubo nabakhi kuvimbela ukuklama kabusha nokubambezeleka kokukhiqiza.

Ukukhetha izinto ze-PCB ezifanele ezivame kakhulu ekugcineni kuyibhalansi phakathi kokusebenza kukagesi, izindleko, kanye nokukwazi ukukhiqiza — isinqumo esingcono kakhulu esenziwe ngokubambisana kwasekuqaleni nabakhiqizi be-PCB abanolwazi.

Isiphetho

Ama-PCB emvamisa ephezulu ahlanganisa izinto ezithuthukisiwe, ukukhiqiza okunembayo, kanye nomklamo oqondile ukuze kuqinisekiswe ukuvinjelwa okuzinzile nokulahlekelwa kwesignali ephansi kuzo zonke izinhlelo zokusebenza ezifunwayo. Zibalulekile ekuxhumaneni okungenantambo, i-radar yezimoto, nezinhlelo zekhompyutha zejubane eliphezulu lapho ukusebenza kukagesi okungaguquki kubalulekile.

Ukuthola imiphumela ethembekile kuncike ekusebenzeni nabakhiqizi abanolwazi ezintweni ze-RF, isilawuli se-impedance, kanye nokunemba kwenqubo. Izinto ezicashile ezifana nokuphatha impahla kanye nokunemba kokwakhiwa kuvame ukunquma ukuthi umklamo umane usebenza noma usebenza kahle yini.

Kwa-Highleap Electronics, sihlinzeka ngokukhiqiza ama-PCB avame kakhulu ngezinto ze-RF ezithembekile kanye nezinqubo ze-impedance ezilawulwa kahle. Ithimba lethu lobunjiniyela lisebenzisana namakhasimende ukuze lenze ngcono ama-stackups futhi lilinganise ukusebenza kahle ngezindleko zemiklamo ye-elekthronikhi yesizukulwane esilandelayo.