Ke Litheknoloji life tsa Antenna tse Sebelisitsoeng ho Boitsebiso ba Radio Frequency Identification (RFID)?

Ke Litheknoloji life tsa Antenna tse Sebelisitsoeng ho Boitsebiso ba Radio Frequency Identification (RFID)?

 

Ho theosa le lilemo re sebelitse linyeoe tse makholo tsa ho hloleha, 'me hoo e ka bang tse robong ho tse leshome li khutlela morao mathateng a li-antenna ho fapana le bofokoli ba chip. Ka bomalimabe bareki ba bangata ba qeta libeke ba bapisa li-database tsa chip ha moralo oa antenna o phetheloa ka letsatsi kapa a mabeli.

RFID e na le lihlopha tse 'nè tsa maqhubu. Fisiks ea antenna e fapane haholo pakeng tsa bona hoo ho bapisa coil ea 125 kHz le dipole ea 900 MHz ho tšoana le ho bapisa transformer le tora ea khaso ea TV.

 

 

Ka maqhubu a tlase le a holimo-125 kHz le 13.56 MHz-theke e lutse sebakeng se haufi sa lenakana la 'mali. Matla a fetisoa ka khokahanyo ea makenete pakeng tsa likhoele tse peli, tse ts'oanang le kamoo transformer e sebetsang kateng. Kahoo hangata ha re e bitse "antenna" ho hang-"coil" kapa "inductor" e nepahetse haholoanyane. LF e kopanya terata ea koporo ea moea ho potoloha melamu ea ferrite. Ferrite ke ceramic e nang le matla a matla a khoheli a kenang 'meleng, e lebisang phallo ho molumo o monyane. Bakeng sa 13.56 MHz, li-coil tse ngata ke li-spirals tse bataletseng tse kentsoeng ho PCB kapa filimi ea PET-fekthering ea rona maemo a 0.07mm ka botenya ba koporo ea koporo.

Moeli o sebetsang oa lihlopha tseo ka bobeli mohlomong ke mithara ea sebaka sa ho bala tlas'a maemo a loketseng. Hangata e nyane.

 

Hang ha u fihla ho 860-960 MHz, papali e fetoha ka ho feletseng. Bophahamo ba maqhubu bo honyela hoo antenna e boholo bo lekaneng e ka khantšang maqhubu a motlakase tšimong e hole. Li-Dipoles, methapo{4}}, li-antenna tsa 'nete tse nang le lipaterone tsa mahlaseli le likarolo tsa bohlokoa tsa ho se sebetse.

 

Halofo-wave dipole ho 915 MHz e matha hoo e ka bang 16 centimeters ho fihla ntlheng. Meander-mehalo ea mela e mena bolelele boo ho ea pele hore o kenelle leiboleng e nyane. U rekisa bandwidth bakeng sa compactness. Hlooho e kholoanyane ke ho ts'oanela ho ts'oara. Li-chips tsa UHF RFID li hlahisa impedance e rarahaneng e nang le karolo ea 'nete e potolohileng 20Ω le capacitive reactance hangata lipakeng tsa -150 ho -220Ω ho latela mofuta oa chip. Antenna e tlameha ho fana ka conjugate. Software ea simulation e sebetsana le sena hona joale empa ho fumana papali e tšepahalang ho mamello ea tlhahiso ho nka nako e telele.

 

Hang ha u beha theke holim'a tšepe, ts'ebetso e theoha haholo-ena mohlomong ke eona taba e atileng haholo mererong ea UHF. Li-antenna tse nang le lifofane tse fatše li sebetsa ho potoloha sena empa eketsa litšenyehelo le botenya.

 

Lihlopha tsa Microwave tsa 2.45 GHz ho ea holimo li teng bakeng sa RFID empa ho na le tšebeliso e fokolang ea kantle ho pokello ea litefiso le{1}}seseteme ea nako ea sebele.

Ho lumellana ha tlhahiso ho arola li-deployments ho tloha ho ho hlōleha ha masimo. Khatello ea li-coil winding e ama inductance. Etching chemistry e ama trace geometry. Liphetoho tsa khatiso ea skrine li ama ho hanyetsa ha maqephe. Boleng ba Chip bonding bo ama ho phela halelele-. Ha ho le e 'ngoe ea tsena e hlahang ho database.

Ha u khetha khafetsa, bapisa fisiks le bothata. LF e kenella ka har'a 'mele 'me e sebetsa haufi le tšepe-ea boitsebiso ba liphoofolo e sebetsa ho eona ka lebaka le utloahalang. HF e sebetsana le NFC le likopo tsa ho lefa. UHF e fana ka mefuta le lebelo la thepa le thepa empa e hloka tlhokomelo ho maemo a tikoloho.

 

 

Litlhaloso tsa lethathamo la lintlha li nka maemo a lab a nepahetseng-tag sheba sebali, sebaka sa mahala, ha ho tšitiso. Bakeng sa moralo oa sebele oa morero, qala ka ho khaola palo eo ka halofo, ebe u boloka karolo e 'ngoe ea 20% holimo. Ntho e 'ngoe le e 'ngoe e ka holimo e tsoa ho seo re ithutileng sona ho tsamaisa li-tag le tlhahiso ea 'mali Jingzhou lilemong tse leshome le metso e robeli tse fetileng-ikutloe u lokolohile ho ikopanya le uena haeba u batla ho bua ka lintlha tse tobileng.