Ukuhlelwa kwe-eriyali ye-RFID UHF kunye nokukhetha

I-eriyali ye-RFID UHF yinxalenye ebaluleke kakhulu yezixhobo ze-hardware ekufundeni kwe-RFID, i-eriyali ye-RFID UHF eyahlukileyo ichaphazela ngokuthe ngqo umgama wokufunda kunye noluhlu. I-eriyali ze-RFID UHF zeentlobo ngeentlobo, indlela yokukhetha i-eriyali ye-RFID UHF efanelekileyo ngokweeprojekthi ezahlukeneyo kubaluleke kakhulu.

Ngokwezixhobo ezahlukeneyo

Kukho i-eriyali ye-PCB RFID, i-eriyali ye-ceramic RFID, i-eriyali yepleyiti ye-aluminium kunye ne-eriyali ye-FPC, njl. Njenge-eriyali ye-ceramic RFID, inomsebenzi ozinzileyo kunye nobukhulu obuncinci. Siyazi ukuba obona bukhulu buncinci be-eriyali ye-ceramic yi-18X18 mm, ngokuqinisekileyo, kunokubakho ezincinci. Kodwa i-eriyali ye-ceramic ayifanelekanga ukwenza inkulu kakhulu, eyona inkulu kwimarike yi-RFID UHF i-eriyali ye-5dbi, ubukhulu be-100 * 100mm. Ukuba ubungakanani bukhulu ngokwentelekiso, zombini imveliso kunye neendleko azikho nzuzo njengePCB kunye ne-antenna yealuminiyam. I-eriyali ye-UHF PCB yi-eriyali enkulu yokuzuza kwaye lukhetho lwabantu abaninzi. Kwi-eriyali ye-PCB RFID, iqokobhe linokufakwa ukuhlangabezana nokusetyenziswa kwangaphandle. Uphawu olukhulu lwe-antenna ye-FPC iyaguquguquka, ilungele phantse zonke iimveliso ezincinci ze-elektroniki.

Umahluko phakathi kwee-eriyali ezipolarized circularly and linearly polarized

Kwi-polarization yomgca, xa isalathiso se-polarization ye-eriyali efumanayo ihambelana necala le-polarization (isalathiso sendawo yombane), isiginali yeyona ilungileyo (intelekelelo ye-electromagnetic wave kwicala le-polarization yeyona inkulu). Ngokuchasene noko, njengoko isalathiso se-polarization ye-eriyali efumanayo yahluke kakhulu kwisalathiso somgca we-polarization, isignali iba yincinci (intelekelelo iyancipha ngokuqhubekayo). Xa isalathiso se-polarization ye-eriyali efumanayo i-orthogonal ukuya kwicala le-polarization yomgca (ulwalathiso lwe-magnetic field), umqondiso owenziwe ngu-zero (uqikelelo ngu-zero). Indlela ye-polarization yomgca ineemfuno eziphezulu kwicala le-eriyali. Ii-eriyali ze-linearly polarized azifane zisetyenziswe, umzekelo, ii-eriyali kwiimvavanyo zegumbi le-microwave anechoic kufuneka zibe yi-linearly polarized.

Kwii-eriyali ezijikelezayo ezijikelezayo, umqondiso owenziweyo uyafana kungakhathaliseki icala le-polarization ye-eriyali efumanayo, kwaye akukho mahluko (intelekelelo yamaza ombane kulo naliphi na icala iyafana). Ngako oko, ukusetyenziswa kwe-polarization yesetyhula kwenza inkqubo ingabi nankathalo ekuqhelaniseni i-antenna (apha ukuqhelaniswa kukuqhelaniswa kwe-antenna, eyahlukileyo kwi-orientation ye-directional system ekhankanywe ngaphambili). Ke ngoko, ii-eriyali ezijikelezayo zisetyenziswa kwiimeko ezininzi kwiiprojekthi ze-IoT.

Umahluko phakathi kwe-eriyali ye-RFID ekufutshane nentsimi kunye ne-eriyali ye-RFID ekude

Njengoko igama lisitsho, i-eriyali ye-RFID ekufutshane yi-eriyali yokufunda kuluhlu olusondeleyo. Imitha yamandla igxininiswe kuluhlu olusondele kakhulu ngaphezulu kwe-eriyali, eqinisekisa isiphumo sokufunda esikufutshane ngaphandle kokufunda gwenxa okanye umtya ofunda iithegi zeRFID ezijikelezileyo. Izicelo zayo zijolise ikakhulu kwiiprojekthi ezifuna ukufundwa kufutshane ngaphandle kokufunda ngokungafanelekanga iithegi ezijikeleze i-eriyali, njengolawulo lwempahla yobucwebe, ulawulo lwezixhobo zonyango, ukuhlaliswa kweevenkile ezinkulu ezingenamntu, kunye neekhabhathi zezixhobo ezikrelekrele njalo njalo.

I-eriyali ye-RFID ekude ine-engile ye-radiation yamandla kunye nomgama omde. Ngokunyuka kokufumana i-eriyali kunye nobukhulu, uluhlu lwemitha kunye nomgama wokufunda wonyuka ngokufanelekileyo. Kwisicelo, zonke ii-eriyali ezikude ziyafuneka ekufundeni kude, kwaye umfundi ophathwa ngesandla usebenzisa ii-eriyali ezikude. Umzekelo, ulawulo lwempahla yokugcina impahla, ulawulo lwemathiriyeli yefektri kunye noluhlu lwempahla, njl.