RFID UHF kav hlau txais xov kev faib thiab xaiv
RFID UHF kav hlau txais xov yog ib qho tseem ceeb heev ntawm cov cuab yeej kho vajtse hauv RFID nyeem ntawv, qhov sib txawv RFID UHF kav hlau txais xov ncaj qha cuam tshuam rau kev nyeem ntawv thiab ntau yam. RFID UHF kav hlau txais xov muaj ntau hom, yuav ua li cas xaiv txoj cai RFID UHF kav hlau txais xov raws li cov haujlwm sib txawv yog qhov tseem ceeb heev.
Raws li cov khoom sib txawv
Muaj PCB RFID kav hlau txais xov, ceramic RFID kav hlau txais xov, txhuas phaj kav hlau txais xov thiab FPC kav hlau txais xov, thiab lwm yam. Xws li ceramic RFID kav hlau txais xov, nws muaj kev ua haujlwm ruaj khov thiab me me. Peb paub tias qhov loj tshaj plaws ntawm cov kav hlau txais xov ceramic yog 18X18 hli, tau kawg, tej zaum yuav muaj cov me me. Tab sis cov kav hlau txais xov ceramic tsis haum rau ua ntau dhau, qhov loj tshaj plaws ntawm kev ua lag luam yog RFID UHF kav hlau txais xov 5dbi, loj 100 * 100mm. Yog tias qhov loj me me, ob qho tib si ntau lawm thiab tus nqi tsis zoo li PCB thiab txhuas kav hlau txais xov. UHF PCB kav hlau txais xov yog loj nce kav hlau txais xov thiab yog qhov kev xaiv ntawm cov neeg feem coob. Rau PCB RFID kav hlau txais xov, lub plhaub tuaj yeem ntsia tau kom tau raws li kev siv sab nraum zoov. Tus yam ntxwv loj tshaj plaws ntawm FPC kav hlau txais xov yog hloov tau, haum rau yuav luag txhua yam khoom siv hluav taws xob me.
Qhov sib txawv ntawm lub voj voog polarized thiab linearly polarized kav hlau txais xov
Rau linear polarization, thaum lub polarization kev taw qhia ntawm tus kav hlau txais xov yog zoo ib yam nrog cov linear polarization kev taw qhia (cov kev taw qhia ntawm hluav taws xob teb), lub teeb liab yog qhov zoo tshaj plaws (qhov projection ntawm electromagnetic yoj nyob rau hauv lub polarization kev taw qhia yog qhov loj tshaj plaws). Ntawm qhov tsis sib xws, raws li cov kev taw qhia polarization ntawm cov kav hlau txais xov yog ntau qhov sib txawv ntawm cov kev taw qhia polarization, cov teeb liab ua me me (qhov projection txo qis tsis tu ncua). Thaum lub polarization kev taw qhia ntawm tus kav hlau txais xov yog orthogonal mus rau linear polarization kev taw qhia (magnetic field direction), lub teeb liab induced yog xoom (projection yog xoom). Txoj kev linear polarization muaj kev xav tau siab dua ntawm kev coj ntawm tus kav hlau txais xov. Linearly polarized antennas tsis tshua siv, piv txwv li, cov kav hlau txais xov hauv microwave anechoic chamber thwmsim yuav tsum yog cov kav hlau txais xov polarized.
Rau cov kav hlau txais xov polarized ncig, lub teeb liab induced yog tib yam tsis hais lub polarization kev taw qhia ntawm cov kav hlau txais xov tau txais, thiab tsis muaj qhov sib txawv (qhov projection ntawm electromagnetic tsis nyob rau hauv ib qho kev taw qhia yog tib yam). Yog li ntawd, kev siv lub voj voog polarization ua rau lub kaw lus tsis tshua muaj kev cuam tshuam rau kev taw qhia ntawm lub kav hlau txais xov (ntawm no qhov kev taw qhia yog kev taw qhia ntawm lub kav hlau txais xov, uas txawv ntawm qhov kev taw qhia ntawm cov kev taw qhia uas tau hais ua ntej). Yog li ntawd, cov kav hlau txais xov polarized ncig yog siv nyob rau hauv feem ntau ntawm cov xwm txheej hauv IoT cov haujlwm.
Qhov sib txawv ntawm ze-field RFID kav hlau txais xov thiab far-field RFID kav hlau txais xov
Raws li lub npe cuam tshuam, ze ze RFID kav hlau txais xov yog ib lub kav hlau txais xov rau kev nyeem ntawv nyob ze. Lub zog hluav taws xob muaj nyob rau hauv qhov sib ze ze saum lub kav hlau txais xov, uas ua kom cov kev nyeem ntawv nyob ze yam tsis muaj kev nyeem tsis raug lossis txoj hlua nyeem cov cim npe nyob ib puag ncig RFID. Nws cov ntawv thov feem ntau yog tsom rau cov haujlwm uas yuav tsum tau nyeem nyob ze yam tsis muaj kev nyeem ntawv tsis zoo nyob ib puag ncig lub kav hlau txais xov, xws li kev tswj hwm cov khoom muag khoom muag, kev tswj cov khoom siv kho mob, tsis muaj neeg saib xyuas lub khw muag khoom, thiab cov cuab yeej ntse thiab lwm yam.
Tus kav hlau txais xov RFID nyob deb muaj lub zog loj hluav taws xob lub kaum ntse ntse thiab qhov ntev. Nrog rau qhov nce ntawm cov kav hlau txais xov nce thiab qhov loj, qhov hluav taws xob ntau thiab kev nyeem ntawv nce ntxiv raws li. Hauv daim ntawv thov, tag nrho cov kav hlau txais xov nyob deb yog xav tau rau kev nyeem ntawv nyob deb, thiab tus nyeem ntawv tuav kuj siv cov kav hlau txais xov nyob deb. Piv txwv li, warehouse logistics tswj, Hoobkas khoom tswj thiab khoom vaj khoom tsev, thiab lwm yam.