Ukuqhathaniswa kwe-RO4003C vs FR4 PCB

Ukuqhathanisa okuwusizo phakathi kwe-RO4003C ne-FR4 yibhodi ohlose ukuyakha, hhayi ithebula lezinto ezihlukene. Ubude bokulandelela, imvamisa yokusebenza, ukubekezelelana kwe-impedance, ukubhanqa kwezingqimba kanye nesabelomali sokulahlekelwa esitholakalayo kunquma ukuthi i-premium yezinto ezisetshenziswayo ishintsha i-PCB eqediwe ngokwanele yini ukuba ibe yinto ebalulekile. I-RO4003C ne-FR4 zingalandela ukuhwebelana okuhlukile kukagesi nezindleko - ngakho ukuqhathanisa okuwusizo yibhodi eliqediwe kunentengo ye-laminate yodwa. Lokhu kuqhathanisa okuseceleni kuhlanganisa ukulahlekelwa kwe-dielectric kusuka ku-500 MHz kuya ku-24 GHz, ukubekezelelana kwe-Dk, ukuthembeka kokushisa, umehluko wokucubungula, kanye nohlaka olucacile lwesinqumo olunezigaba ezine olusiza onjiniyela ukukhetha phakathi kwe-FR4, i-FR4 elahlekelwa kancane, i-RO4003C, kanye ne-Rogers yezinga eliphezulu ngemvamisa nesabelomali sabo esithile.

Okuqukethwe

1. I-RO4003C vs FR4: Ithebula Lokuqhathanisa Izakhiwo Zezinto
2. Ukulahlekelwa Kwesignali ye-RO4003C vs FR4 ku-1 GHz kuya ku-30 ​​GHz
3. Ukubekezelelana kwe-Dk kanye nokuZinza kwe-Impedance: RO4003C vs FR4
4. Ukuthembeka Kokushisa: RO4003C vs FR4 Ngaphansi Kokucindezeleka
5. Ungakwazi yini ukucubungula i-RO4003C kumugqa wokukhiqiza we-FR4?
6. Isikhathi Sokusebenzisa i-RO4003C Esikhundleni se-FR4
7. Ukukhiqiza i-RO4003C kanye ne-FR4 PCB e-Highleap

1. RO4003C vs FR4: Ithebula Lokuqhathanisa Izakhiwo Zezinto

Inombolo eyodwa ebaluleke kakhulu yi-Df. I-RO4003C's dissipation factor engu-0.0027 cishe iphansi ngo-7–9× kune-FR4 ku-10 GHz. Lesi sikhala asibalulekile ngaphansi kuka-500 MHz kodwa sikhula ngokushesha ngemvamisa, okwenza i-Df ibe yinto enqumayo ekushintsheni kwezinto. Lapho isilinganiso somlilo noma ezinye izidingo zishintsha uhlu olufushane, i-RO4350B njengenketho ehlukile ye-RF laminate kufanele ihlolwe ngokwehlukana nokuqhathaniswa kwe-FR-4.

2. Ukulahlekelwa Kwesignali ye-RO4003C vs FR4 ku-1 GHz kuya ku-30 ​​GHz

Ukulahlekelwa okulinganiselwe kokufakwa ngesentimitha ngalinye le-50 Ω microstrip kuma-cores angu-8 mil, ithusi elingu-1 oz:

I-crossover incike kubude be-trace kanye nesabelomali sokulahlekelwa. I-trace engu-5 cm RF ku-5.8 GHz ku-FR4 inezela cishe u-0.5 dB wokulahlekelwa okweqile uma kuqhathaniswa ne-RO4003C — okwanele ukwehlisa ukuzwela kwe-receiver ngokulinganisa. Ngaphansi kwe-1 GHz, i-FR4 cishe njalo yanele. Phakathi kwe-1–6 GHz, hlola ngobude be-trace kanye nokuzwela kwesekethe. Ngaphezulu kwe-6 GHz, i-RO4003C noma i-Rogers yezinga eliphezulu iyindinganiso yemiklamo ye-PCB enemvamisa ephezulu.

3. Ukubekezelelana kwe-Dk kanye nokuQina Ukuzinza: RO4003C vs FR4

Ukubekezelelana kwe-Lot-to-lot Dk. I-RO4003C ibamba i-Dk = 3.38 ± 0.05 (± 1.5%). I-microstrip engu-50 Ω ihlala ngaphakathi kwe-49-51 Ω kusuka ku-Dk variation kuphela. I-FR4 iyahlukahluka ±5-10%, ibeka umklamo ofanayo noma kuphi kusuka ku-45-55 Ω kuzo zonke izindawo zokukhiqiza. Kumasekethe abalulekile e-impedance — izihlungi ze-RF, ama-couplers emigqa ehlanganisiwe, amanethiwekhi okuphakelayo kwe-antenna — ukuhlukahluka kwe-FR4 akwamukeleki.

I-Dk uma iqhathaniswa nezinga lokushisa. I-RO4003C ishintsha ngaphansi kuka-50 ppm/°C. Ngaphezulu kuka-−40 °C kuya ku-+85 °C, ushintsho oluphelele lwe-Dk lucishe lube ngu-0.02 — alunamsebenzi. I-FR4 ishintsha kusuka ku-200–400 ppm/°C, okukhiqiza ukujiya okungu-0.10–0.20 ebangeni elifanayo. Eziteshini zangaphandle, kuma-electronics ezimoto , noma kuma-aerospace system, lokhu kujiya kwe-FR4 kudala ukwehluka kokusebenza okususwa yiRogers.

I-Dk uma iqhathaniswa nemvamisa. I-RO4003C igcina i-Dk icishe ihlale njalo kusukela ku-1 GHz idlule ku-40 GHz. I-Dk ye-FR4 yehla kusukela cishe ku-4.5 ku-100 MHz iye ku-4.0 ku-10 GHz — ushintsho lwe-10% olususa izihlungi ze-broadband futhi luhambisa i-impedance kulo lonke ibhendi yokusebenza.

Ububanzi bezinto ezibonakalayo: igama lomkhiqizo weRogers lisetshenziselwa ukuhlonza i-laminate echazwe ekwakheni i-PCB. I-Highleap Electronics inikeza ukwenziwa nokuhlanganiswa kwe-PCB, kuyilapho i-laminate itholakala futhi iqinisekiswa ngokwehlukana.

4. Ukuthembeka Kokushisa: RO4003C vs FR4 Ngaphansi Kokucindezeleka

Ukusinda kokugeleza kabusha okungenalo umthofu. I-RO4003C (Tg > 280 °C) ayithambi ngesikhathi sokugeleza kabusha okungenalo umthofu ku-260 °C. I-FR4 ejwayelekile idlula ekushintsheni kwayo kwengilazi ngesikhathi sokugeleza kabusha, ukunwebeka nokuthamba. Kumabhodi ane-BGA arrays eningi, ukuzinza kobukhulu be-RO4003C kunciphisa amaphutha e-solder joint.

Ukushabalalisa ukushisa. Ukushisa kwe-RO4003C (0.71 W/m·K) kungaphezu kwe-FR4 ephindwe kabili (0.25–0.30 W/m·K). Kumamojula e-RF ahlanganisiwe anama-amplifier wamandla kanye nokugeleza komoya okulinganiselwe, uRogers udlulisela ukushisa endaweni ephansi kahle, ehlisa izinga lokushisa lokuhlangana.

Ngokusebenzisa ukuthembeka ngaphansi kokujikeleza kokushisa. I-Z-axis CTE (46 ppm/°C) ye-RO4003C iqhathaniswa ne-FR4 (50–70 ppm/°C), ngakho-ke ukuthembela okuyisisekelo kuyafana. Inzuzo ivela ku-Tg: I-RO4003C ichitha isikhathi esincane kakhulu ohlelweni lwe-CTE oluphezulu ngaphezu kwe-Tg ngesikhathi sokujikeleza kokushisa, okunciphisa ukucindezeleka kwebhareli elihlanganisiwe. Ngezinhlelo zokusebenza ezidinga imijikelezo yokushisa engaphezu kwe-1,000, lokhu kuholela emngceleni wokuthembeka olinganisekayo.

5. Ungakwazi yini ukucubungula i-RO4003C kulayini wokukhiqiza we-FR4?

Yebo. I-RO4003C iyinhlanganisela ye-hydrocarbon/ceramic — hhayi i-PTFE — ngakho-ke ayidingi ukwelashwa nge-plasma, i-sodium etch, noma i-lamination yokushisa okuphezulu. Noma iyiphi ifektri ehlonyiselwe i-FR4 ingayicubungula ngokulungiswa okuncane:

Lokhu kuhambisana kunezinzuzo ezintathu ezisebenzayo. Okokuqala, abahlinzeki abaningi bangacaphuna i-RO4003C kune-Rogers esekelwe ku-PTFE, okudala amanani ancintisanayo. Okwesibili, ama-stackup e-hybrid ane-FR4 aqondile - akukho ukusebenza kwendawo okudingekayo. Okwesithathu, isikhathi se-prototype sincike ekwakhiweni kwe-RO4003C okuqondile, ubunzima bebhodi, ubuningi kanye nokutholakala kwezinto zamanje; isikhathi sokuhola kufanele siqinisekiswe ngokumelene ne-RFQ ekhishwe. Ngokombono wokukhiqiza, umehluko omkhulu ukuthi i-stackup ingabekezelela ukuguquguquka kukagesi okungakanani. Kwibhodi le-hybrid elilawulwa yi-impedance, umenzi kufanele abukeze ubukhulu be-dielectric yangempela kanye ne-geometry yethusi bese eqinisekisa umphumela oqediwe kunokukopisha amanani ajwayelekile kusuka kukhathalogi kuya ekusethweni kwe-CAM. Amanani empahla eqondile kufanele ahlolwe ngokumelene nemibhalo yamanje yomhlinzeki webanga elicacisiwe kanye nokwakhiwa.

6. Isikhathi Sokusebenzisa i-RO4003C Esikhundleni se-FR4

I-RO4003C ithatha indawo yokushintshana kwezindleko nokusebenza kahle. Inikeza ukulahlekelwa okuphansi okungu-7–9× kune-FR4 kanye nokubekezelelana okuqinile okungu-4–7× ngenkathi icutshungulwa kumishini ejwayelekile ye-FR4. Eziningi zezinhlelo zokusebenza ze-RF eziphakathi kuka-2 no-20 GHz, i-RO4003C iyisinqumo sokuqala esifanele ngaphambi kokucabangela ezinye izindlela ze-PTFE ezibizayo.

7. Ukukhiqiza i-RO4003C kanye ne-FR4 PCB e-Highleap

I-Highleap Electronics ikhiqiza i-RO4003C, i-FR4, kanye nama-hybrid stackups ahlanganisa lokhu okubili. Sisiza amakhasimende ukuthi akhethe izinto ezifanele ngesikhathi sokucaphuna — wabelane ngemvamisa yokusebenza kwakho kanye nezidingo zakho, futhi ithimba lethu lizoncoma inketho efanelekile yezidingo ezikhishwe ngaphambi kokuthi uzibophezele.

Ukwakhiwa kwe-RO4003C okutholakalayo kuqinisekiswa ngesikhathi sokucaphuna: ama-core angu-8, 10, 20, 32, kanye nama-60 mil anethusi elingu-0.5 oz kanye ne-1 oz. I-RO4450F bondply yokwakha enezingqimba eziningi kanye ne-hybrid. Ukutholakala kwezinto kanye nezindleko zokuthenga kuqinisekiswa ngesikhathi sokucaphuna. Izindleko kufanele ziqhathaniswe ebhodini elifanelekile, hhayi intengo ye-laminate yodwa. Cela uhlaka olufanayo lwebhodi, ithusi, ukuqeda, ukuhlolwa kanye nobuningi kuzo zombili izingcaphuno ukuze ukuqhathanisa kufaka phakathi amathuluzi, izibikezelo zenzuzo kanye nanoma yikuphi ukuqinisekiswa okwengeziwe kwe-RF.

Ukwenziwa okulawulwa yi-impedance : Amakhuphoni aqinisekiswe yi-TDR kuwo wonke amaphaneli. Ukubekezelelana ±5% okujwayelekile, ±3% ye-RF enembile.

Cela isilinganiso — faka imvamisa yokusebenza, inani lezingqimba, ubukhulu bebhodi, izinhloso ze-impedance, kanye nobuningi.