RFID UHF gulu la mlongoti ndi kusankha

Mlongoti wa RFID UHF ndi gawo lofunikira kwambiri pazida zamagetsi pakuwerenga kwa RFID, mlongoti wosiyana wa RFID UHF umakhudza mwachindunji mtunda wowerengera ndi kuchuluka kwake. Tinyanga za RFID UHF ndi zamitundu yosiyanasiyana, momwe mungasankhire mlongoti woyenera wa RFID UHF molingana ndi ma projekiti osiyanasiyana ndikofunikira kwambiri.

Malinga ndi zipangizo zosiyanasiyana

Pali PCB RFID mlongoti, ceramic RFID mlongoti, aluminiyamu mbale mlongoti ndi FPC mlongoti, etc. Monga ceramic RFID mlongoti, ili ndi ntchito yokhazikika komanso yaying'ono. Tikudziwa kuti kukula kochepa kwambiri kwa mlongoti wa ceramic ndi 18X18 mm, ndithudi, pangakhale ang'onoang'ono. Koma mlongoti wa ceramic siwoyenera kuchita zazikulu kwambiri, zazikulu pamsika ndi RFID UHF mlongoti 5dbi, kukula 100 * 100mm. Ngati kukula kwake kuli kokulirapo, kupanga komanso mtengo wake sizothandiza ngati PCB ndi mlongoti wa aluminiyamu. Mlongoti wa UHF PCB ndiwokwera kwambiri ndipo ndi chisankho cha anthu ambiri. Kwa mlongoti wa PCB RFID, chipolopolocho chikhoza kukhazikitsidwa kuti chigwirizane ndi ntchito yakunja. Chikhalidwe chachikulu cha mlongoti wa FPC ndi wosinthika, woyenera pafupifupi zinthu zonse zazing'ono zamagetsi.

Kusiyana pakati pa tinyanga tozungulira polarized ndi linearly polarized antennas

Pamizere yozungulira, pomwe mbali ya polarization ya mlongoti wolandirayo ikugwirizana ndi njira yolowera polarization (njira yolowera kumunda wamagetsi), siginecha ndiyo yabwino kwambiri (kuwonetsetsa kwa mafunde a electromagnetic kumayendedwe a polarization ndikokulirapo). M'malo mwake, momwe mayendedwe a polarization a mlongoti wolandirira amakhala wosiyana kwambiri ndi njira yotsatsira polarization, chizindikirocho chimakhala chocheperako (chiwonetserocho chimachepetsa mosalekeza). Pamene mbali ya polarization ya mlongoti wolandirayo ndi orthogonal kupita kumalo ozungulira polarization (maginito amtundu wa maginito), chizindikiro chomwe chimayendetsedwa ndi ziro (kuyerekeza ndi ziro). Njira yotsatsira polarization ili ndi zofunikira zapamwamba pamayendedwe a mlongoti. Tinyanga zokhala ndi polarized sizimagwiritsidwa ntchito kawirikawiri, mwachitsanzo, tinyanga tating'onoting'ono ta microwave anechoic chamber sayenera kukhala tinyanga ta polarized.

Kwa tinyanga zozungulira polarized, siginecha yoyendetsedwa ndi yofanana mosasamala kanthu za komwe akudutsa mlongoti wolandila, ndipo palibe kusiyana (kuwonetsetsa kwa mafunde a electromagnetic mbali iliyonse ndikofanana). Choncho, kugwiritsira ntchito polarization yozungulira kumapangitsa kuti dongosololi likhale losakhudzidwa kwambiri ndi kayendetsedwe ka mlongoti (pano chigawocho ndi njira ya mlongoti, yomwe ili yosiyana ndi kayendetsedwe ka kayendetsedwe ka kayendetsedwe kameneka kotchulidwa poyamba). Chifukwa chake, ma antenna ozungulira polarized amagwiritsidwa ntchito nthawi zambiri muma projekiti a IoT.

Kusiyana pakati pa mlongoti wa RFID wapafupi ndi tinyanga ta RFID takutali

Monga dzina limatanthawuzira, mlongoti wapafupi ndi RFID ndi mlongoti wowerengera pafupi. Ma radiation amphamvu amakhazikika patali kwambiri pamwamba pa tinyanga, zomwe zimatsimikizira kuwerengera kwapang'onopang'ono popanda kuwerenga molakwika kapena zingwe kuwerenga ma tag ozungulira a RFID. Ntchito zake zimangoyang'ana mapulojekiti omwe amafunikira kuwerengedwa moyandikira osawerenga molakwika ma tag ozungulira mlongoti, monga kasamalidwe ka zodzikongoletsera, kasamalidwe ka zida zamankhwala, malo ogulitsira osayendetsedwa ndi anthu, makabati anzeru ndi zina zotero.

Mlongoti wa RFID wakutali uli ndi ngodya yayikulu yowunikira mphamvu komanso mtunda wautali. Ndi kuwonjezeka kwa kupindula ndi kukula kwa tinyanga, kuchuluka kwa ma radiation ndi mtunda wowerengera kumawonjezeka moyenerera. Pogwiritsira ntchito, tinyanga zonse zakutali zimafunikira powerenga patali, ndipo wowerenga m'manja amagwiritsanso ntchito tinyanga takutali. Mwachitsanzo, kasamalidwe ka zinthu zosungiramo katundu, kuwongolera zinthu zafakitale ndi kuwerengera katundu, ndi zina.