Udidi kunye nokukhetha i-antenna ye-RFID UHF
I-antenna ye-RFID UHFyinxalenye ebaluleke kakhulu yezixhobo zehardware ekufundeni iRFID, ezahlukeneyo I-antenna ye-RFID UHF Ichaphazela ngqo umgama wokufunda kunye nomgama. Ii-antenna ze-RFID UHF zeentlobo ngeentlobo, indlela yokukhetha i-antenna ye-RFID UHF efanelekileyo ngokweeprojekthi ezahlukeneyo ibaluleke kakhulu.
Ngokwezinto ezahlukeneyo
Nazi I-antenna ye-PCB RFID, i-antenna ye-RFID yodongwe, i-antenna yepleyiti yealuminiyamkunye ne-antenna ye-FPC, njl.njl.. Isixhobo ngasinye sineengenelo kunye neengxaki zaso kwaye sisetyenziswa kwiimeko ezahlukeneyo. Njenge-antenna ye-RFID ye-ceramic, inokusebenza okuzinzileyo kunye nobukhulu obuncinci. Siyazi ukuba ubungakanani obuncinci be-antenna ye-ceramic yi-18X18 mm, ewe, kunokubakho ezincinci. Kodwa i-antenna ye-ceramic ayifanelekanga ukuba yenziwe ibe nkulu kakhulu, eyona inkulu kwimarike yi-RFID UHF antenna 5dbi, ubungakanani yi-100 * 100 mm. Ukuba ubungakanani bukhulu kakhulu, zombini imveliso kunye neendleko azinanzuzo njenge-PCB kunye ne-antenna ye-aluminium. I-antenna ye-UHF PCB yi-antenna enkulu yokufumana inzuzo kwaye lukhetho lwabantu abaninzi. I-PCB Rfid i-antenna, iqokobhe lingafakelwa ukuze lihlangabezane nokusetyenziswa ngaphandle. Uphawu olukhulu lwe-antenna ye-FPC luguquguquka, lufanelekile phantse kuzo zonke iimveliso ezincinci ze-elektroniki.
Umahluko phakathi kwee-antenna ezijikelezileyo ezi-polarized kunye nezi-antenna ezi-polarized ezi-linearly
Kwi-linear polarization, xa ulwalathiso lwe-polarization lwe-antenna efumanayo luhambelana nolwalathiso lwe-linear polarization (ulwalathiso lwentsimi yombane), isignali yeyona ilungileyo (uqikelelo lwe-electromagnetic wave kwicala le-polarization lelona likhulu). Ngokuchaseneyo, njengoko ulwalathiso lwe-polarization lwe-antenna efumanayo lwahlukile ngakumbi kulwalathiso lwe-linear polarization, isignali iba ncinci (uqikelelo luyehla rhoqo). Xa ulwalathiso lwe-polarization lwe-antenna efumanayo luhambelana nolwalathiso lwe-linear polarization (ulwalathiso lwe-magnetic field), isignali ebangelwayo yi-zero (uqikelelo yi-zero). Indlela ye-linear polarization ineemfuno eziphezulu kwicala le-antenna. Ii-antenna ezi-linear polarized azisetyenziswa rhoqo, umzekelo, ii-antenna kwi-microwave anechoic chamber experiments kufuneka zibe zii-antenna ezi-linear polarized.
Kwii-antenna ezijikelezileyo ezijikelezileyo, isignali ebangelwayo iyafana nokuba i-antenna ikweyiphi na indlela ye-polarization, kwaye akukho mahluko (ukubonakala kwamaza e-electromagnetic kulo naliphi na icala kuyafana). Ke ngoko, ukusetyenziswa kwe-polarization ejikelezileyo kwenza inkqubo ingaziva kakhulu kwindlela ye-antenna (apha indlela ye-antenna ijikelezileyo, eyahlukileyo kwindlela ye-antenna ekhankanyiweyo ngaphambili). Ke ngoko, ii-antenna ezijikelezileyo ezijikelezileyo zisetyenziswa kwiimeko ezininzi kwiiprojekthi ze-IoT.
Umahluko phakathi kwe-antenna ye-RFID ekufutshane nentsimi kunye ne-antenna ye-RFID ekude
Njengoko igama lisitsho, i-antenna ye-RFID ekufutshane yi-antenna yokufunda kufutshane. Imitha yamandla igxile kuluhlu olukufutshane ngaphezu kwe-antenna, nto leyo eqinisekisa isiphumo sokufunda kufutshane ngaphandle kokufunda gwenxa okanye ukufunda iithegi ze-RFID ezijikelezileyo. Usetyenziso lwayo lujolise ikakhulu kwiiprojekthi ekufuneka zifundwe kufutshane ngaphandle kokufunda gwenxa iithegi ezijikeleze i-antenna, njengolawulo lwezinto zobucwebe, ulawulo lwezixhobo zonyango, indawo yokuhlala yeevenkile ezinkulu ezingenabantu, kunye neekhabhathi zezixhobo ezikrelekrele njalo njalo.
I-antenna ye-RFID ye-far-field ine-engile enkulu yemitha ye-energy kunye nomgama omde. Ngokukhula kokwanda kwe-antenna kunye nobukhulu bayo, uluhlu lwemitha kunye nomgama wokufunda luyanda ngokufanelekileyo. Ekusetyenzisweni kwayo, zonke ii-antenna ze-far-field ziyafuneka ukuze kufundwe kude, kwaye umfundi ophathwayo usebenzisa ii-antenna ze-far-field. Umzekelo, ulawulo lwezinto zokugcina impahla, ulawulo lwezinto zefektri kunye noluhlu lwezinto ezisetyenzisiweyo, njl.njl.