Zolumikizira za feeder SMA sizimangokhala gawo lina la RF-ndiwo akavalo osagwiritsidwa ntchito pamakina ogawa mazizindikiro komwe kudalirika sikungakambirane. Tawawona akulephera pansi pa njinga yamoto yotentha m'masiteshoni akunja. Tawawona akugwira - osagwedezeka kapena kutayika - pambuyo pa makwerero 5,000 m'ma laboratories oyesa mafoni. Ndipo tamva mainjiniya akunena kuti, *“Ngati SMA yodyetsa ikhala yokhazikika, ulalo wonse umakhalabe wodziwikiratu.”* Izi sinkhani zamalonda. Ndi chowonadi chotsimikizika pamunda.

Nchiyani Chimapangitsa Wodyetsa SMA Kuposa Cholumikizira Chokha?

SMA yophatikizira sichimatanthauzidwa ndi kuphatikiza kwake kolumikizidwa kokha. Kuchita kwake kumadalira pamitundu itatu yapadziko lonse lapansi: kusasinthika kwa ma frequency (nthawi zambiri 50 Ω ±0.3 Ω kuchokera ku DC kupita ku 18 GHz), kubwereza kwa makina pansi pa kugwedezeka, komanso kulimba kwa mawonekedwe motsutsana ndi okosijeni ndi kugunda. Zolephera zambiri zomwe tazipeza sizinali chifukwa cha mapangidwe a cholumikizira-koma kusalinganika kwa chingwe, kugwiritsa ntchito torque kosagwirizana, kapena kugwiritsa ntchito manja a dielectric omwe sali ovoteledwa m'malo okhala ndi chinyezi chambiri.

Zolumikizira zenizeni za SMA zolumikizira zimagwiritsa ntchito matupi amkuwa okhala ndi siliva okhala ndi PTFE kapena zotsekera za PTFE—osati polyethylene wamba. Pini yapakati iyenera kusunga <0.02 mm kutha pambuyo pokweretsa mobwerezabwereza. Kutayika koyika kumakhala pansi pa 0.15 dB pa 6 GHz ikayikidwa bwino. Kubwereranso kutayika kumapitilira 30 dB mpaka 12 GHz. Manambalawa ndi ofunika chifukwa amakhudza mwachindunji kulakwitsa pang'ono mu maulalo a 5G fronthaul ndi kukhazikika kwagawo muzakudya za radar zotsatizana.

Timayesa gulu lililonse motsutsana ndi MIL-STD-348B pakuchita kwa RF ndi IEC 61169-10 pakupirira kwamakina. Palibe njira zazifupi. Ayi "zabwino". Chifukwa m'makina a antenna omwe amagawidwa kapena kuyika kwa mayeso a EMC, kulumikizidwa kwa m'mphepete kumodzi kumafika kusatsimikizika kwadongosolo.

Chifukwa chiyani SMA Yokhazikika Siyokwanira-Ndipo Zoyenera Kuyang'ana M'malo mwake

Ena angatsutse kuti SMA iliyonse yotchedwa "RF grade" idzachita. Komabe, zolumikizira wamba za SMA zamalonda nthawi zambiri zimadumpha kuwongolera kowongolera m'malo osinthira, kugwiritsa ntchito makulidwe osagwirizana, komanso kusowa ziphaso zopezeka. M'malo mwake, izi zikutanthauza kuti ma spikes apamwamba a VSWR pamwamba pa 8 GHz, kukhudzana kwakanthawi pakukula kwamafuta, komanso kuvala msanga pambuyo pa mizunguliro 1,200 - osati 5,000+ yomwe ikuyembekezeka muzodyetsa zofunikira kwambiri.

Kusiyanasiyana kumawonekera m'magawo atatu:

Tasinthanso ma feed opitilira 200 omwe adalephera kale mu telecom tower retrofits - ndipo nthawi zonse, zomwe zimayambitsa zimayambira ku mawonekedwe osagwirizana ndi chingwe, osati mlongoti kapena amplifier.

Kuyika Sikoyenera - Ndi Gawo la Zomwe Zasankhidwa

SMA feeder imagwira ntchito komanso kukhazikitsa kwake. Torque ndi yofunika-komanso kutsatana. Timatchula 7-9 in-lb pazitsulo zosapanga dzimbiri, 5-7 in-lb zamkuwa. Koma torque yokhayo siyingakonze kusakonzekera bwino kwa chingwe. Kuya kwa kuvula kuyenera kufanana ndi cholumikizira cha dielectric cholumikizira. Kuphimba kwa ma braid kuyenera kukhala kofanana - osati kupindika, osati kupindika. Ndi ma solder olowa? Amapita * kokha pa kondakitala wakunja—osati nsalu ya chishango, osati chojambulacho, osati zonse ziwiri. Mmodzi molakwika amayambitsa discontinuities zomwe zimasonyeza mphamvu m'malo mozipereka.

Kutsimikizika kwadziko lenileni kumaphatikizapo:

Izi si overkill. Ndimomwe mumapewa kudziwa kuti tsamba lanu la maola 24 likulephera nthawi ya 3 koloko m'mawa chifukwa chodyetsa SMA chinapanga 12 dB kubwerera ku 3.5 GHz usiku wonse.

Kudalirika Kumayamba Asanayambe Kutembenuka Koyamba Kwa Wrench

Zibo Jixiang Machinery Co., Ltd. sipanga zolumikizira za SMA zodyetsa—ndipo sizidzatero. Ukatswiri wathu wagona pazomera zomangirira konkriti, makina owuma amatope, ndi njira zophatikizira phula - pomwe kukhulupirika kwazizindikiro kumakhala kocheperako kuposa njira zolemetsa komanso kusasinthasintha kwazinthu. Koma timaphatikiza * ma feeder SMA interfaces mu makabati athu owongolera, zipata zoyang'anira kutali, ndi ma module a telemetry opangidwa ndi IoT. Ndipo m'mapulogalamu amenewo, timangotchula zigawo za SMA zokha zovomerezeka ku IPC-A-620 Class 3 ndikuyesedwa pa IEC 60512-2-1.

Chifukwa kudalirika si mbali. Ndilo maziko. Ndizomwe zimalola kuti chomera cha konkire chizigwira ntchito mosalekeza kwa miyezi 18 popanda kulumikizana ndi PLC - ngakhale m'mabwalo odzaza fumbi kapena madera opopera mchere am'mphepete mwa nyanja. Ndichifukwa chake chomera chathu cha SjGZD060-3G chowuma chimasunga kulondola kwa dosing mkati mwa ± 0.5% pamagulu 5,000, pomwe RF telemetry yake imakhala yotsekeka pakatikati pa SCADA node.

Wodyetsa SMA ndi woposa zitsulo ndi pulasitiki. Ndilo ulalo woyamba pamndandanda wodalirika-kuchokera ku sensa kupita ku seva, kuchokera ku chipangizo cham'munda kupita ku dashboard yamtambo. Sankhani monga momwe mumasankhira konkire yanu yoyambira: ndi kutsata kwathunthu, kuyesedwa kolembedwa, ndi kulolera zero pakusiyana.