Izixhumi ze-Feeder SMA aziyona nje enye ingxenye ye-RF—zingamahhashi okusebenza angakasetshenziswa ezinhlelweni zokusabalalisa amasignali lapho ukwethembeka kungenakuxoxisana khona. Sibabonile behluleka ngaphansi kwamabhayisikili ashisayo eziteshini ezingaphandle. Sibabuke bebambelela—ngaphandle kokukhukhuleka noma ukulahlekelwa—ngemuva kwemijikelezo yokukhwelana engu-5,000 kumalebhu okuhlola eselula. Futhi sizwe onjiniyela bethi, *“Uma i-SMA yokuphakelayo ihlala izinzile, sonke isixhumanisi sihlala sibikezelwa.”* Akuyona inkulumo yokumaketha leyo. Kuyiqiniso eliqinisekisiwe emkhakheni.

Yini eyenza i-SMA Yokuphakelayo Ibe Ngaphezu Kwesixhumi Nje?

I-SMA yokuphakelayo ayichazwa ngokuhlanganisa kwayo okuwuchungechunge kuphela. Ukusebenza kwayo kuncike ezintweni ezintathu eziguquguqukayo zomhlaba wangempela: ukungaguquguquki kwe-impedance kuwo wonke amabhendi efrikhwensi (ngokuvamile i-50 Ω ±0.3 Ω ukusuka ku-DC kuye ku-18 GHz), ukuphindaphinda komshini ngaphansi kokudlidliza, nokuqina kwesixhumi esibonakalayo ngokumelene ne-oxidation ne-galling. Ukwehluleka okuningi esikutholile akubangelwanga idizayini yesixhumi—kodwa ukulungiswa kwekhebula okungafani, ukufakwa kwetorque okungahambisani, noma ukusebenzisa imikhono ye-dielectric engalinganiselwe ezindaweni ezinomswakama ophezulu.

Izixhumi ze-SMA ze-Feder-grade zangempela zisebenzisa imizimba yethusi enesiliva ene-PTFE noma izivikeli ezinwetshiwe ze-PTFE—hhayi i-polyethylene evamile. Iphinikhodi ephakathi nendawo kufanele igcine ukugijima okungu-<0.02 mm ngemva kokukhwelana okuphindaphindiwe. Ukulahlekelwa kokufaka kuhlala ngaphansi kuka-0.15 dB ku-6 GHz uma kufakwe kahle. Ukulahlekelwa kwembuyiselo kudlula 30 dB kufika ku-12 GHz. Lezi zinombolo zibalulekile ngoba zithinta ngokuqondile izinga lephutha elincane kuzixhumanisi ze-5G fronthaul kanye nokuzinza kwesigaba kokuphakelayo kwe-radar yezigaba ezihlukene.

Sivivinya zonke iqoqo ngokumelene ne-MIL-STD-348B ngokusebenza kwe-RF kanye ne-IEC 61169-10 ngokukhuthazela kwemishini. Azikho izinqamuleli. Hhayi "kuhle ngokwanele." Ngoba ezinhlelweni ezisabalalisiwe ze-antenna noma ukusetha kokuhlolwa kwe-EMC, ukuxhumana okukodwa okusemaceleni kudlulela ekungaqinisekini kwezinga lesistimu.

Kungani i-SMA Ejwayelekile Inganele—Futhi Yini Okufanele Uyibheke Esikhundleni

Abanye bangase baphikise ngokuthi noma iyiphi i-SMA ebhalwe ukuthi “RF grade” izokwenza. Kodwa-ke, izixhumi ezijwayelekile ze-SMA zezentengiso zivame ukweqa isilawuli se-impedance esilawulwayo endaweni yoshintsho, zisebenzisa ugqinsi lwe-plating olungahambisani, futhi zintula izitifiketi zezinto ezibonakalayo. Empeleni, lokho kusho ukuthi ama-VSWR aphakeme kakhulu angaphezu kuka-8 GHz, ukuthintana ngezikhathi ezithile ngesikhathi sokwanda okushisayo, nokugqoka ngaphambi kwesikhathi ngemva kwemijikelezo engu-1,200—hhayi okungu-5,000+ okulindelekile kokuphakelayo okubalulekile.

Umehluko ubonakala ezindaweni ezintathu:

Sishintshe iziphakeli zefa ezingaphezu kuka-200 ezihlulekile ekubuyiseleni kabusha kombhoshongo we-telecom—futhi ngaso sonke isikhathi, imbangela eyinhloko ilandelela emuva ku-geometry yesixhumi esibonakalayo sekhebula engahambisani, hhayi i-antenna noma i-amplifier.

Ukufakwa Akukona Ukuzikhethela—Kuyingxenye Yesicaciso

I-Feder SMA isebenza kuphela kanye nokufakwa kwayo. I-torque ibalulekile-kodwa kunjalo ukulandelana. Sicacisa u-7–9 in-lb wensimbi engagqwali, 5–7 in-lb eyethusi. Kodwa i-torque iyodwa ngeke ilungise ukulungiswa kwekhebula okubi. Ukujula kokukhumula kufanele kufane nesitobhi se-dielectric sesixhumi. Ukumbozwa kwe-braid kufanele kube okufanayo - hhayi ukusonteka, hhayi ukugqagqana. Futhi amalunga e-solder? Zihamba *kuphela* kumqhubi wangaphandle—hhayi umluko wehawu, hhayi ucwecwe, hhayi kokubili. Isinyathelo esisodwa esingalungile sethula ukungaqhubeki okubonisa amandla esikhundleni sokuwaletha.

Ukuqinisekiswa komhlaba wangempela kufaka:

Lokhu akukona ukudlula ngokweqile. Kuyindlela ogwema ngayo ukuthola ukuthi ukusebenza kwesayithi lakho lamahora angu-24 kwehluleka ngo-3 ekuseni ngoba i-SMA eyodwa yokuphakelayo ithuthukise ukulahlekelwa kokubuya okungu-12 dB ku-3.5 GHz ngobusuku obubodwa.

Ukuthembeka Kuqala Ngaphambi Kokujika Kokuqala Kwe-Wrench

I-Zibo Jixiang Machinery Co., Ltd. ayikhiqizi izixhumi ze-SMA eziphakelayo—futhi ngeke neze ikwenze. Ubuchwepheshe bethu bulele ezitshalweni zokuhlanganisa ukhonkolo, amasistimu odaka olomile, nezixazululo zokuxuba itiyela—lapho ubuqotho besignali bubalulekile kunezindlela zomthwalo wesakhiwo nokuvumelana kokugeleza kwezinto. Kodwa *siyakwenza* ukuhlanganisa izixhumanisi zokuphakelayo ze-SMA kumakhabethe ethu okulawula azenzakalelayo, amasango okuqapha akude, kanye namamojula we-telemetry wezitshalo anikwe amandla yi-IoT. Futhi kulezo zinhlelo zokusebenza, sicacisa kuphela izingxenye ze-SMA eziphakelayo ezigunyazwe ku-IPC-A-620 Class 3 futhi zihlolwe nge-IEC 60512-2-1 ngayinye.

Ngoba ukwethembeka akusona isici. Yisisekelo. Yilokho okuvumela isitshalo sikakhonkolo ukuthi sisebenze ngokuqhubekayo izinyanga eziyi-18 ngaphandle kokuyeka ukuxhumana kwe-PLC—ngisho nasezinkwalini ezinothuli noma ezindaweni ezifutha ngosawoti ogwini. Kungakho isitshalo sethu sodaka olomile lwe-SjGZD060-3G sigcina ukunemba komthamo phakathi kuka-±0.5% kuzo zonke iziqephu ezingu-5,000, kuyilapho i-RF telemetry yayo ehlala ivaliwe endaweni emaphakathi ye-SCADA.

I-Feeder SMA ingaphezu kwensimbi nepulasitiki. Isixhumanisi sokuqala ochungechungeni lokwethembana—kusuka kunzwa kuya kuseva, kusuka kudivayisi yasensimini kuya kudeshibhodi yamafu. Kukhethe njengoba ukhetha ukhonkolo lwesisekelo sakho: ngokulandeleka okugcwele, ukuhlola okubhaliwe, kanye nokungabekezeleli nhlobo ukwehluka.