Kutha kwa Dorp-In RF Microwave

Mawonekedwe:

Mafupipafupi apamwamba
Kudalirika Kwambiri ndi Kukhazikika

Mapulogalamu:

Opanda zingwe
Kukonza zida
Rada

Lumikizanani Tsopano

Kutha kwa Drop-In (komwe kumadziwikanso kuti surface-mount termination resistor) ndi gawo losiyana la ukadaulo wa surface-mount (SMT) lomwe limapangidwira makamaka ma circuits a digito othamanga kwambiri komanso ma radio frequency (RF). Cholinga chake chachikulu ndikuletsa kuwunikira kwa chizindikiro ndikuwonetsetsa kuti chizindikirocho ndi cholondola (SI). M'malo molumikizidwa kudzera pa mawaya, chimayikidwa mwachindunji kapena "kulowetsedwa" m'malo enaake pamizere yotumizira ya PCB (monga mizera ya microstrip), chikugwira ntchito ngati choletsa termination chofanana. Ndi gawo lofunikira pakuthana ndi mavuto a khalidwe la chizindikiro chothamanga kwambiri ndipo chimagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana zolumikizidwa, kuyambira pa ma seva apakompyuta mpaka zomangamanga zolumikizirana.

Makhalidwe:

1. Kugwira ntchito kwapadera kwa pafupipafupi komanso kufananiza kolondola kwa impedance
Ultra-Low parasitic inductance (ESL): Pogwiritsa ntchito mapangidwe atsopano oyima ndi ukadaulo wapamwamba wazinthu (monga ukadaulo wopyapyala), parasitic inductance imachepetsedwa (nthawi zambiri miyeso yolondola yotsutsa: Imapereka miyeso yolondola komanso yokhazikika yotsutsa), kuonetsetsa kuti kutha kwa impedance kukugwirizana ndendende ndi miyeso ya chingwe chotumizira (monga, 50Ω, 75Ω, 100Ω), kukulitsa kuyamwa kwa mphamvu ya chizindikiro ndikuletsa kuwunikira.
Yankho labwino kwambiri la ma frequency: Limasunga mawonekedwe okhazikika olimbana ndi ma frequency osiyanasiyana, limagwira ntchito bwino kwambiri kuposa ma axial kapena radial lead resistor achikhalidwe.
2. Kapangidwe ka kapangidwe kamene kanabadwira kuphatikiza kwa PCB
Kapangidwe kapadera koyima: Kuyenda kwa magetsi kumakhala kolunjika pamwamba pa bolodi la PCB. Ma electrode awiriwa ali pamwamba ndi pansi pa gawolo, olumikizidwa mwachindunji ku gawo lachitsulo la chingwe chotumizira magetsi ndi gawo la pansi, zomwe zimapangitsa njira yafupi kwambiri ya magetsi ndikuchepetsa kwambiri kulowerera kwa kuzungulira komwe kumachitika chifukwa cha ma resistors achikhalidwe.
Ukadaulo wokhazikika woyika pamwamba (SMT): Umagwirizana ndi njira zodzipangira zokha, woyenera kupanga zinthu zambiri, kukonza magwiridwe antchito komanso kusinthasintha.
Yaing'ono komanso yosunga malo: Ma phukusi ang'onoang'ono (monga 0402, 0603, 0805) amasunga malo amtengo wapatali a PCB, zomwe zimapangitsa kuti ikhale yoyenera mapangidwe a bolodi lokhala ndi anthu ambiri.
3. Kugwira ntchito mwamphamvu komanso kudalirika
Kutaya mphamvu moyenera: Ngakhale kuti ndi yaying'ono, kapangidwe kake kamapangitsa kuti mphamvu itayike, zomwe zimathandiza kuti igwire bwino kutentha komwe kumapangidwa panthawi yosiya chizindikiro cha liwiro lalikulu. Pali mitundu ingapo ya mphamvu zomwe zilipo (monga 1/16W, 1/10W, 1/8W, 1/4W).
Kudalirika kwambiri ndi kukhazikika: Imagwiritsa ntchito makina okhazikika komanso zomangamanga zolimba, imapereka mphamvu zabwino kwambiri zamakanika, kukana kutentha, komanso kudalirika kwa nthawi yayitali, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito m'mafakitale ovuta.

Mapulogalamu:

1. Kutha kwa mabasi a digito othamanga kwambiri
Mu mabasi othamanga kwambiri (monga DDR4, DDR5 SDRAM) ndi mabasi osiyana, komwe kuchuluka kwa ma signal transmission kuli kokwera kwambiri, ma Drop-In Termination resistor amayikidwa kumapeto kwa mzere wotumizira (kumapeto kwa terminal) kapena ku gwero (kumapeto kwa source). Izi zimapereka njira yotsika yopinga kupita ku magetsi kapena pansi, zomwe zimayamwa mphamvu ya ma signal ikafika, motero zimachotsa kuwunikira, kuyeretsa ma waveform a ma signal, ndikuwonetsetsa kuti deta ikuyenda bwino. Iyi ndi njira yake yakale kwambiri komanso yofala kwambiri mu ma memory modules (DIMMs) ndi mapangidwe a mamaboard.
2. Ma RF ndi ma microwave circuits
Mu zida zolumikizirana zopanda zingwe, makina a radar, zida zoyesera, ndi makina ena a RF, Drop-In Termination imagwiritsidwa ntchito ngati katundu wofanana ndi zomwe zimachokera ku magetsi ogawaniza, ma couplers, ndi ma amplifiers. Imapereka impedance yokhazikika ya 50Ω, yomwe imayamwa mphamvu yochulukirapo ya RF, kukonza kusiyanitsa kwa njira, kuchepetsa zolakwika muyeso, ndikuletsa kuwunikira kwa mphamvu kuti iteteze zigawo za RF zobisika ndikuwonetsetsa kuti makina akugwira ntchito bwino.
3. Ma interface othamanga kwambiri
Muzochitika zomwe mawaya a bolodi ndi ataliatali kapena topology ndi yovuta, monga PCIe, SATA, SAS, USB 3.0+, ndi maulalo ena othamanga kwambiri okhala ndi zofunikira zolimba zamtundu wa chizindikiro, Kuthamangitsidwa kwakunja kwapamwamba kwambiri kumagwiritsidwa ntchito pofananiza bwino.
4. Zipangizo zolumikizirana ndi maukonde
Mu ma router, ma switch, ma optical module, ndi zida zina, komwe mizere ya ma signal yothamanga kwambiri pama backplanes (monga 25G+) imafuna kulamulira kokhwima kwa impedance, Drop-In Termination imagwiritsidwa ntchito pafupi ndi zolumikizira za backplane kapena kumapeto kwa mizere yayitali yotumizira kuti ikonze bwino umphumphu wa ma signal ndikuchepetsa bit error rate (BER).

QualwaveZida za Dorp-In Terminations zimaphimba ma frequency osiyanasiyana a DC~3GHz. Mphamvu yogwiritsira ntchito mphamvu imafika ma watts 100.