Yadda Haɗin PCB Mai Haɗawa Ke Shafar Ingancin Sigina a Aikace-aikacen Yawan Mita

Juriyar matakin haɗin PCB yana ɗaya daga cikin mahimman sigogi waɗanda aka fi watsi da su amma waɗanda ke ƙayyade amincin sigina a cikin tsarin lantarki mai yawan mita. Lokacin da lokutan tashin sigina suka kusanci nanosecond 1 ko ƙasa da haka, girman zahiri na hanyar haɗin mahaɗin ya fara mamaye halayen lantarki. Injiniyoyin ƙira suna zaɓar masu haɗin. don sadarwa Kayayyakin more rayuwa, tsarin sarrafa masana'antu, ko na'urorin RF ba za su iya ɗaukar haƙurin jifa a matsayin takamaiman bayani ba.

Domin ko da ƙaramin karkacewa a cikin tazara tsakanin hulɗa da mutane yana haifar da rashin daidaituwar juriya wanda ke nuna kuzarin da ke komawa ga tushen maimakon isar da shi cikin tsabta. A cikin tsarin 50 ohm da ke aiki a 2.4 GHz, matakin juriya mai jurewa na ohms 10 kawai zai iya samar da rabon ƙarfin lantarki mai tsayi (VSWR) wanda ya wuce 1.5: 1, wanda ke haifar da asarar wutar lantarki 4% wanda ke haɗuwa a cikin hanyoyin haɗin haɗi da yawa.

Fahimtar Tsarin Haɗin PCB da Matsayinsa a cikin Watsa Sigina

Fitilar haɗin — Nisa tsakanin ma'auratan da ke kusa da juna a cikin mahaɗin PCB ko soket na IC - yana bayyana ainihin yanayin hanyar watsawa. Wannan girman, tare da halayen kayan dielectric da yanayin hulɗa, yana kafa impedance na halayyar (Z0) wanda sigina ke fuskanta yayin da yake tafiya ta cikin mahaɗin.

A cikin ƙirar PCB mai yawan mita, manufar ita ce a ci gaba da daidaita juriya a duk faɗin hanyar siginar daga direba zuwa mai karɓa. Duk wani canji kwatsam a cikin impedance yana haifar da wani ɓangare na tunani. Ƙarfin da aka nuna yana raguwa daga siginar tafiya gaba, yana rage girman mai karɓa kuma yana iya haifar da kurakurai a cikin tsarin dijital.

Alaƙar da ke tsakanin sautin haɗin haɗi da impedance tana bin ƙa'idar layin watsawa da aka kafa. Faɗin sautin gabaɗaya yana haifar da babban juriya ga wani yanayin hulɗa, yayin da ƙaramin sautin sautin yana rage juriya ta hanyar ƙara haɗin capacitive tsakanin masu jagoranci da ke kusa.

Me Yasa Juriyar Fitowa Take Da Muhimmanci - Ba Kawai Fitowa Ba

Ƙimar sautin da aka ƙayyade (2.54mm, 2.0mm, 1.27mm) suna ba da yanayin da aka yi niyya, amma haƙurin masana'antu yana ƙayyade yadda ake kiyaye wannan yanayin a ko'ina cikin girman samarwa. Haɗin da aka ƙayyade a girman 2.54mm amma an ƙera shi da juriyar +/-0.15mm zai nuna babban bambanci a cikin juriya daga fil zuwa fil da kuma daga tsari zuwa tsari.

Saboda impedance yana da daidaiton da ya dace da tazara tsakanin siginar da masu dawo da sigina, bambancin +/-0.1mm a cikin sautin murya na iya haifar da bambancin impedance na +/-4 zuwa +/-8 ohms a cikin tsarin microstrip na 50 ohm na yau da kullun. Lokacin da wannan bambancin ya kai +/-12 ohms ko fiye - wanda aka saba da masu haɗin gwal masu ƙarancin kuɗi - katsewar impedance zai zama mai tsanani don rage ingancin sigina ko da a matsakaicin mitoci.

Wannan shine dalilin da ya sa ƙayyade jure wa sautin murya ke raba manyan tsare-tsare masu yawan mita daga hanyoyin da masu sha'awar wasan kwaikwayo ke bi. Ajin haƙurin +/-0.05mm da ake samu a cikin soket ɗin IC na NBJGE yana wakiltar matakin aiki mai inganci don ingantaccen aiki sama da GHz 1.

Kwatanta Fitilar Soket ta IC: 1.27mm da 2.0mm da 2.54mm

Layin samfurin soket na IC na NBJGE ya ƙunshi nau'ikan juzu'i guda uku na yau da kullun, kowannensu an inganta shi don fannoni daban-daban na aikace-aikacen mita mai yawa. Dangane da ma'aunin TDR na masana'anta da aka gudanar a kwata na 1 na 2026 a cikin samfuran sama da 200, kwatancen da ke ƙasa yana nuna sigogin daidaiton siginar da aka auna don kowane aji na jimla.

Ma'auninmu ya nuna bambanci sosai: ƙaramin sautin yana ba da ƙarin yawan fil amma yana haifar da mafi girman magana da ƙarancin juriya, duka biyun suna lalata aikin mita mai yawa. Bambancin sautin 2.54mm, tare da ƙananan magana (-32 dB vs -22 dB na 1.27mm) kuma ya fi dacewa da ƙarfin tsarin 50 ohm, koyaushe yana yin fice a cikin masu haɗin fitattun sauti a cikin aikace-aikacen RF analog sama da 1 GHz.

Wannan muhimmin bayani ne ga injiniyoyin ƙira: idan ingancin sigina ya fi muhimmanci, kada a yi amfani da mafi ƙarancin siginar da ake da ita kawai don adana sarari. Soket ɗin IC mai girman 2.54mm shine zaɓi mafi kyau ga yawancin hanyoyin sadarwa na RF da sadarwa har zuwa 5 GHz.

Yadda Juriyar Masana'antu ke Ƙirƙirar Rashin Ci Gaban Impedance

Abubuwa uku na musamman na masana'antu suna fassara juriyar sautin zuwa lalacewar sigina mai aunawa: Kuskuren sanya lamba, bambancin girma na insulator, da kuma rashin daidaiton kauri na plating.

Tsarin dalili #1: Saboda kuskuren sanya lamba yayin gyaran da sakawa yana haifar da tazara mara daidaituwa tsakanin hulɗar sigina da ke kusa, ƙarfin kowane naúrar yana canzawa daga fil zuwa fil. Wannan bambancin ƙarfin da aka yi amfani da shi yana haifar da canjin impedance daidai a kowane wurin haɗin gwiwa. A 2.4 GHz, kuskuren juzu'i na 0.08mm tsakanin fil biyu da ke kusa yana haifar da canjin capacitance na kimanin 0.15 pF, wanda a cikin tsarin 50 ohm ya dace da matakin impedance na 7 ohms.

Tsarin dalili #2: Saboda kayan rufin rufi (yawanci PA66, PA6T, ko LCP) suna fuskantar raguwar kashi 0.2-1.5% yayin aikin sanyaya injunan allura, ainihin tazara tsakanin hulɗa bayan sanyaya ya bambanta da ƙirar ramin mold. Haɗin ramin 2.54mm da aka ƙera a cikin PA6T tare da raguwar mold 0.6% yana fuskantar matsakaicin raguwar sautin 0.015mm. Idan aka haɗa shi da lalacewa ta kayan aiki, bambancin zafin jiki, da bambancin rukuni na kayan, juriyar tarin abubuwa na iya kaiwa 0.10-0.15mm.

Tsarin dalili #3: Domin zaɓe rufin zinare (yawanci 0.76-1.27 um akan shingen nickel) yana ƙara 15-25 um na abu a kowane saman hulɗa, bambance-bambancen kauri na plating a fadin layin mahaɗin yana haifar da ƙananan canje-canje amma ana iya aunawa. Layukan plating masu sauri masu zaɓi tare da sa ido kan kauri XRF na ainihin lokaci suna riƙe wannan bambancin zuwa +/-3 um, yayin da hanyoyin yau da kullun na iya ba da damar +/-8 um.

Matsayin Kayan Dielectric a cikin Ayyukan Yawan Mita

Kayan rufewa da ke kewaye da hulɗar mahaɗin PCB yana da tasiri mai zurfi kan ingancin sigina - har ma fiye da juriyar sautin a wasu lokuta. Ma'aunin dielectric (Dk) da kuma dissipation factor (Df) na kayan gida suna ƙayyade yadda filin lantarki ke aiki a mahaɗin mahaɗin.

LCP dielectrics Fadada kewayon mitar da ake amfani da ita na ƙirar sautin da aka bayar da kashi 30-50% idan aka kwatanta da gidajen PA66 na yau da kullun, galibi saboda ƙarancin ma'aunin dielectric na LCP da kuma ƙarancin ma'aunin watsawa sosai. Ga soket ɗin IC mai girman 2.54mm wanda ke aiki a 3.5 GHz, gidan LCP yana rage asarar shigarwa daga kimanin -0.9 dB zuwa -0.5 dB — ci gaba da kashi 44%.

NBJGE tana ba da zaɓuɓɓukan LCP da PPS dielectric a cikin kewayon samfuran soket ɗin IC ga abokan ciniki waɗanda aikace-aikacensu ke buƙatar matsakaicin ingancin sigina a mitoci sama da 2 GHz.

Lalacewar Ingancin Sigina: Daga Ka'ida zuwa Tasirin da Za a Iya Aunawa

Lalacewar siginar da haƙurin sautuka ke haifarwa tana bayyana ta hanyoyi uku masu aunawa: karuwar asarar riba, karuwar magana ta hanyar sadarwa, da kuma tarin jitter a cikin kwararar bayanai na dijital.

Asarar dawowa - wanda aka auna a matsayin S11 a cikin dB - yana ƙididdige adadin siginar da ta faru da aka mayar da baya saboda rashin daidaiton impedance. Ga mahaɗin da ke aiki a 3 GHz tare da juriyar +/-0.10mm, ana auna asarar dawowar da aka saba gani -12 zuwa -15 dB, ma'ana kashi 3-6% na ƙarfin sigina ana nuna su. Inganta haƙuri ga +/-0.05mm yana inganta asarar dawowar zuwa -18 zuwa -22 dB, yana rage ƙarfin da aka nuna zuwa 0.6-1.5%.

Crosstalk — wanda aka auna a matsayin S21 (kusa da ƙarshe) ko S31 (ƙasa mai nisa) — yana ƙididdige haɗin da ba a so tsakanin hanyoyin sigina da ke kusa. A 2 GHz, mai haɗin pitch na 1.27mm yana nuna kusan 10 dB fiye da mai haɗin pitch na 2.54mm a cikin tsari ɗaya.

Tarin jitter - bambancin lokaci na canjin siginar dijital - wataƙila shine mafi mahimmancin tasiri a cikin aiki saboda yana rage yawan lokaci kai tsaye a cikin masu karɓar dijital. Rashin daidaiton impedance da mai haɗawa ya haifar na 10 ohms a ƙimar bayanai ta 1.25 Gbps yana haifar da kusan 25-40 ps na jitter mai ƙayyadewa. Lokacin da hanyoyin haɗin haɗi uku ko huɗu suka kasance a cikin hanyar sigina, jitter mai tarin yawa na iya cinye kashi 30-50% na kasafin kuɗin tazara naúrar da ake da shi.

Jagororin Zaɓe Masu Amfani ga Injiniyoyi Masu Zane

Zaɓi matakin haɗin PCB ɗinku da kuma ajin haƙuri bisa ga mitar aiki, sannan yawan fil da farashi.

Aikace-aikacen DC zuwa 500 MHz

Daidaitaccen girman 2.54mm tare da juriyar +/-0.10mm ya isa. Na'urorin dielectric na PA66 ko PA6T suna samar da isasshen aiki. Aikace-aikacen yau da kullun sun haɗa da siginar sarrafa wutar lantarki, hanyoyin haɗin firikwensin masana'antu, da kuma samun bayanai masu ƙarancin gudu.

Don aikace-aikacen 500 MHz zuwa 3 GHz

Zaɓi sautin 2.54mm ko 2.0mm tare da juriyar +/-0.05mm da kuma PA6T ko PPS dielectric. A ƙayyade ƙarfin da aka sarrafa (50 ohms +/-5 ohms) kuma a nemi bayanan gwajin TDR na masana'anta. Wannan kewayon ya ƙunshi Gigabit Ethernet, na'urori na gaba na WiFi 5/6, da kuma kayayyakin more rayuwa na 4G LTE.

Don aikace-aikacen 3 GHz zuwa 10 GHz

Yi amfani da 2.54mm pitch tare da juriyar +/-0.03mm da LCP dielectric. Nemi cikakken fasalin S-sigogi har zuwa 10 GHz. Wannan ya ƙunshi masu karɓar tauraron dan adam na 5G NR sub-6 GHz da Ku-band. NBJGE ya cimma juriyar +/-0.03mm ta hanyar yin kayan aikin ƙira daidai tare da daidaita zafin kayan aiki na awanni 48 yayin gudanar da samarwa.

Don Sama da 10 GHz

Yi la'akari da hanyoyin haɗin kai na musamman tare da jiragen ƙasa da aka haɗa. Ba a ba da shawarar a yi amfani da soket na IC na yau da kullun sama da 10 GHz ba tare da yin kwaikwayon SI mai zurfi ba. Tuntuɓi ƙungiyar injiniyanmu don shawarwari na musamman kan aikace-aikace.

Hanyoyin Gwaji da Tabbatarwa

TDR (mai nuna yanayin lokaci) ita ce babbar hanyar gwaji don tabbatar da bayanin martabar hana haɗin haɗi a ƙarƙashin yanayin aiki na gaske. Kayan aiki na TDR yana aika bugun matakai masu sauri (yawanci lokacin tashi 35 ps, wanda yayi daidai da bandwidth 10 GHz) kuma yana auna tunani. Kowane katsewar impedance yana bayyana azaman ƙaruwa akan tsarin TDR.

VNA (mai nazarin hanyar sadarwa ta vector) Ma'aunin S-sigogi yana ba da halayyar yankin mita da ake buƙata don kwaikwayon ƙira. Kowace IEC 60512-27-100, Ya kamata a yi ma'aunin S-sigogi na masu haɗin PCB fiye da matsakaicin mitar aiki sau 5.

Binciken zane-zanen ido shine hanya mafi sauƙin fahimta don tantance ingancin siginar dijital ta hanyar mahaɗi. Don soket ɗin NBJGE IC mai girman 2.54mm tare da juriyar +/-0.05mm, gwajin masana'anta a 2.5 Gbps yana nuna buɗe ido a tsaye na 320 mV (68% na girman direba) da kuma jitter a kwance na 22 ps kololuwa-zuwa-kololuwa.

Kwatanta Gasar: NBJGE da Ma'aunin Masana'antu

Domin ba duk soket ɗin IC "daidai" suna ba da aikin haƙuri iri ɗaya ba, mun kwatanta nau'ikan masu samar da kayayyaki guda uku kai tsaye a matakin 2.54mm ta amfani da bayanan gwajin masana'anta daga samfuran guda 50.

Kammalawa da Matakai na Gaba

Juriyar matakin haɗin PCB sigar ƙira ce ta farko don amincin siginar mita mai yawa, ba ƙayyadaddun masana'antu na biyu ba. Bambancin da ke tsakanin +/-0.10mm da +/-0.05mm haƙuri na iya nufin bambanci tsakanin zane-zanen ido na wucewa da na kasawa a 3GHz, wanda ke fassara kai tsaye zuwa amincin filin don kayan aikin sadarwa da na sarrafa masana'antu.

Lokacin da ake kimanta masu samar da haɗin PCB don ƙirar mitar ku ta gaba, nemi takamaiman bayanai na haƙuri tare da ma'aunin juriyar TDR maimakon dogaro da ƙayyadaddun sautin kawai.

NBJGE yana ba da cikakkun rahotannin gwajin amincin sigina tare da kowane samfurin samfurin soket na IC, gami da bayanan TDR impedance da bayanan S-sigogi har zuwa 10 GHz.

Tambayoyin da Ake Yawan Yi

Zan iya amfani da mahaɗin pitch na 1.27mm don aikace-aikacen 5G?

Eh, amma tare da la'akari da ƙira mai kyau. Ana iya amfani da mahaɗin pitch na 1.27mm don 5G NR sub-6 GHz idan ƙirar ta haɗa da kariyar ƙasa da ƙasa kuma mitar ta tsaya ƙasa da 3 GHz. Sama da 3 GHz, mafi girman crosstalk (-22 dB) da ƙananan impedance (42 ohms) na iya haifar da lalacewar sigina mara kyau.

Sau nawa ya kamata in tabbatar da haƙurin jimla a cikin samarwa?

Ya kamata a duba ingancin masu samar da kayayyaki tare da auna girman da'ira a duk bayan watanni 6. Kowace ISO 9001 buƙatun, nemi bayanan auna AOI daga watanni 12 na ƙarshe na samarwa tare da ƙimar Cpk sama da 1.33.

Shin sauyin yanayin zafi yana shafar jurewar filin wasa?

Eh, faɗaɗawar zafi tana shafar matakin haɗin da ke aiki. Mai haɗa LCP mai girman 2.54mm (CTE na 5-10 ppm/C) yana faɗaɗa da kusan 0.0013mm a kowace ƙaruwar C10. Faɗaɗar tarin abubuwa a kan mahaɗin mai fil 64 na iya kaiwa 0.08mm a bambancin zafin jiki na C50. Don aikace-aikacen zafin jiki mai faɗi, ƙayyade kayan da suka dace da CTE.

Nassoshi: ISO 9001: 2015 | IEC 60512-27-100 | Ka'idojin Ingancin Siginar IEEE

An sabunta shi na ƙarshe: 21 ga Mayu, 2026. Bayanai sun dogara ne akan ma'aunin masana'anta na kwata na 1 na 2026 daga samfuran soket na IC sama da 200 a dakin gwaje-gwajen inganci na NBJGE.