Tekinologiya Ki Wa Antenna Akozesebwa Mu Kuzuula Frequency Ya Radio (RFID)?

Tekinologiya ki wa Antenna Akozesebwa mu Kuzuula Frequency ya Radio (RFID)?

 

Emyaka bwe gizze giyitawo tubadde tukwata ebikumi n’ebikumi by’emisango egy’okulemererwa, era nga mwenda ku kkumi giva ku buzibu bwa antenna okusinga obulema mu chip. Ebyembi bakasitoma abasinga bamala wiiki nga bageraageranya chip datasheets ate nga dizayini ya antenna efuna okumalirizibwa mu lunaku lumu oba bbiri.

RFID ekwata ku bbandi za frequency nnya. Fizikisi ya antenna eyawukana nnyo wakati waabwe ne kiba nti okugeraageranya koyilo ya 125 kHz ku dipole ya 900 MHz kiringa okugeraageranya tulansifooma ku munaala gw’okuweereza ku ttivvi.

 

 

Ku frequency entono ne frequency enkulu-125 kHz ne 13.56 MHz-tag etuula mu kifo ekiri okumpi ekya antenna y’omusomi. Amasoboza gayita mu kuyungibwa kwa magineeti wakati wa koyilo bbiri, okufaananako n’engeri tulansifooma gy’ekola. Kale ebiseera ebisinga tetugiyita "antenna" n'akatono-"coil" oba "inductor" kisingako obutuufu. LF coils empewo waya y’ekikomo okwetoloola emiggo gya ferrite. Ferrite ye seramiki erimu obutambuzi bwa magineeti obw’amaanyi obukuŋŋaanya flux mu voliyumu entono. Ku 13.56 MHz, coils ezisinga zibeera flat spirals etched ku PCB oba PET film-mu kkolero lyaffe omutindo guli 0.07mm copper foil thickness.

Ekkomo ery’omugaso eri bbandi zombi mpozzi mita y’obuwanvu bw’okusoma wansi w’embeera ennungi. Ebiseera ebisinga bitono.

 

Bw’omala okutuuka ku 860-960 MHz, omuzannyo gukyuka ddala. Obuwanvu bw’amayengo bukendeera ekimala ne kiba nti antenna ey’obunene obutuufu mu butuufu esobola okufulumya amayengo g’amasannyalaze mu nnimiro ey’ewala. Dipoles, meander-lines, patches-ensengekera za antenna entuufu ezirina ensengekera z’obusannyalazo n’engeri za impedansi ezikulu.

 

Ekitundu-amayengo dipole ku 915 MHz eddukira sentimita nga 16 okuva ku ntikko okutuuka ku ntikko. Dizayini za layini za meander-zizinga obuwanvu obwo emabega n'emabega okutuuka ku kabonero akatono. Osuubula bandwidth okusobola okufuna compactness. Omutwe omunene gwe gulumwa impedance matching. UHF RFID chips ziraga complex impedance nga ekitundu ekituufu okwetoloola 20Ω ne capacitive reactance mu ngeri entuufu wakati wa -150 ne -220Ω okusinziira ku chip model. Antenna erina okuwa ekiyungo ekigatta. Simulation software ekwata kino kati naye okufuna match eyesigika across manufacturing tolerance kyetaagisa iteration.

 

Kasita osibye tag ku kyuma, omulimu gukendeera nnyo-eno osanga y'ensonga emu esinga okubeera mu pulojekiti za UHF. Patch antennas ezirina ennyonyi eziri ku ttaka zikola okwetoloola kino naye nga zongera ku ssente n’obugumu.

 

Microwave bands ku 2.45 GHz n'okudda waggulu ziriwo ku RFID naye laba okwettanira okutono ebweru w'okusolooza ebisale n'enkola z'ebifo eby'ekiseera ekituufu-.

Okukwatagana kw’amakolero kwawula okuteekebwa mu nkola okukola okuva ku kulemererwa mu nnimiro. Okusika omuguwa mu kuzingulula kwa koyilo kukosa inductance. Etching chemistry ekosa trace geometry. Enkyukakyuka mu kukuba ku ssirini zikwata ku buziyiza bw’empapula. Omutindo gw’okusiba chip gukosa okuwangaala okw’ekiseera ekiwanvu-. Tewali na kimu ku bino ekiraga ku datasheet.

Bw’oba ​​olonda frequency, kwataganya physics n’ekizibu. LF eyingira mu bitundu by’omubiri era ekola okumpi n’ekyuma-okuzuula ebisolo kuddukira ku kyo olw’ensonga entuufu. HF y’ekola ku nsonga za NFC n’okusasula. UHF etuwa range ne speed ku inventory ne logistics naye nga yeetaaga okufaayo ku nsonga z’obutonde.

 

 

Datasheet range specifications zitwala embeera za lab ennungi-tag etunudde mu musomi, ekifo eky'eddembe, tewali kutaataaganyizibwa. Ku nteekateeka ya pulojekiti entuufu, tandika ng’osala omuwendo ogwo mu bitundu bibiri, olwo n’okuuma omugabo omulala ogwa 20% waggulu. Byonna waggulu biva mu bye tuyize nga tuddukanya okufulumya kwaffe okwa tag n'abasomi mu Jingzhou mu myaka kkumi n'omunaana egiyise-wulira nga oli waddembe okutuuka bw'oba oyagala okukubaganya ebirowoozo ku bintu ebitongole.