Gulu la RFID UHF la antenna ndi kusankha

RFID UHF antennandi gawo lofunika kwambiri la zida za hardware mu kuwerenga kwa RFID, zosiyana RFID UHF Antena zimakhudza mwachindunji mtunda wowerengera ndi mtunda wowerengera. Ma antenna a RFID UHF ndi amitundu yosiyanasiyana, momwe mungasankhire antenna yoyenera ya RFID UHF malinga ndi mapulojekiti osiyanasiyana ndikofunikira kwambiri.

Malinga ndi zipangizo zosiyanasiyana

Pali Antena ya PCB RFID, ceramic RFID mlongoti, mlongoti wa mbale ya aluminiyamundi FPC antenna, ndi zina zotero. Chida chilichonse chili ndi ubwino ndi kuipa kwake ndipo chimagwiritsidwa ntchito m'njira zosiyanasiyana. Monga ceramic RFID antenna, imakhala ndi magwiridwe antchito okhazikika komanso kukula kwake kochepa. Tikudziwa kuti kukula kochepa kwa ceramic antenna ndi 18X18 mm, ndithudi, pakhoza kukhala zazing'ono. Koma ceramic antenna si yoyenera kuchita zazikulu kwambiri, yayikulu kwambiri pamsika ndi RFID UHF antenna 5dbi, kukula kwake ndi 100 * 100mm. Ngati kukula kwake kuli kwakukulu, kupanga ndi mtengo wake sikopindulitsa ngati PCB ndi aluminium antenna. UHF PCB antenna ndi antenna yayikulu yopeza ndipo ndi chisankho cha anthu ambiri. PCB Rfid Antena, chipolopolocho chikhoza kuyikidwa kuti chigwirizane ndi ntchito yakunja. Khalidwe lalikulu la Antena ya FPC ndi losinthasintha, loyenera pafupifupi zinthu zonse zazing'ono zamagetsi.

Kusiyana pakati pa ma antenna ozungulira ndi ozungulira

Pa polarization yolunjika, pamene njira ya polarization ya antenna yolandira ikugwirizana ndi njira ya polarization yolunjika (njira ya magetsi), chizindikirocho ndi chabwino kwambiri (kuonekera kwa mafunde a electromagnetic mu njira ya polarization ndi chachikulu kwambiri). M'malo mwake, popeza njira ya polarization ya antenna yolandirayo ndi yosiyana kwambiri ndi njira ya polarization yolunjika, chizindikirocho chimakhala chochepa (kuonekera kumachepa mosalekeza). Pamene njira ya polarization ya antenna yolandirayo ili yolunjika ku njira ya polarization yolunjika (njira ya magnetic field), chizindikirocho chimachitika ndi zero (kuonekera ndi zero). Njira ya polarization yolunjika ili ndi zofunikira zapamwamba pa njira ya antenna. Ma antenna ozungulira molunjika sagwiritsidwa ntchito kawirikawiri, mwachitsanzo, ma antenna mu kuyesa kwa chipinda cha microwave anechoic ayenera kukhala ma antenna ozungulira molunjika.

Pa ma antenna ozungulira okhala ndi polarized, chizindikiro chomwe chimachitika chimakhala chimodzimodzi mosasamala kanthu za njira ya polarization ya antenna yolandira, ndipo palibe kusiyana (kuonekera kwa mafunde amagetsi mbali iliyonse ndi kofanana). Chifukwa chake, kugwiritsa ntchito polarization yozungulira kumapangitsa kuti dongosololi lisamvetsetse bwino momwe antenna imayendera (apa njira yolunjika ndi njira ya antenna, yomwe ndi yosiyana ndi njira yolunjika yomwe tatchula kale). Chifukwa chake, ma antenna ozungulira okhala ndi polarized amagwiritsidwa ntchito nthawi zambiri m'mapulojekiti a IoT.

Kusiyana pakati pa antenna ya RFID yapafupi ndi antenna ya RFID yakutali

Monga momwe dzinalo likusonyezera, antenna ya RFID yapafupi ndi antenna yowerengera pafupi. Mphamvu ya kuwala imayikidwa pamalo oyandikira pamwamba pa antenna, zomwe zimapangitsa kuti kuwerenga kukhale koyandikira popanda kuwerenga molakwika kapena kuwerenga ma RFID tag ozungulira. Ntchito zake makamaka zimayang'ana mapulojekiti omwe amafunika kuwerengedwa pafupi popanda kuwerenga molakwika ma tag ozungulira antenna, monga kuyang'anira zinthu zodzikongoletsera, kuyang'anira zida zachipatala, malo ogulitsira zinthu zopanda anthu, ndi makabati anzeru a zida ndi zina zotero.

Antena ya RFID ya kutali ili ndi ngodya yayikulu ya mphamvu ya radiation komanso mtunda wautali. Pamene antena ikuwonjezeka komanso kukula kwake, kuchuluka kwa ma radiation ndi mtunda wowerengera kumawonjezeka moyenerera. Pogwiritsidwa ntchito, antena onse akutali amafunika kuti awerengere patali, ndipo wowerenga wa m'manja amagwiritsanso ntchito antena akutali. Mwachitsanzo, kasamalidwe ka zinthu zosungiramo katundu, kuwongolera zinthu za fakitale ndi zinthu zomwe zili m'katundu, ndi zina zotero.