UHF RFID tabaatabsa chip RF maroh goolisso

Baadal taysabbi qagaaqagih mamaxxaga ( raadiyoh qagaaqagih mamaxxaga, RFID) 1990s uddur toobokeh tan isih is xiqtah tan mamaxxagah teknolooji kinni. RFID teknolooji mango tuxxiq le too barkoox teknolooji alle wayta, kee fidin caddo le assabaltooti, toh nammeyhayto horah baaxô baxiinu*, magaalâ gatbara, maaliyyah tabaatabsa, mekla silsilatih xiinisso, ETC, Gufneh Lowsis, tayyaara booxal shanta xiinisso, ummatta merrayti, kontener baxxaqsa, saqi w.w tanimi. RFID chips bicsaanamih teknolooji. Awayih uddur, applicationitte ossimak geytimtaamih taagah, RFID chips, kaxxa dudda, kaxxa lakqo, qunxa size kee kaxxa data rate faxximta. ta caalatak ugutak, ta warkat xayyooweh xer baxxo, salac le cayla UHF RFID tabaatabsa chip RF maroyta.

mango taamah qagaaqagi RFID edde anuk rammale qagaaqagi 125kHz, 134.2kHz, fayyale qagaaqagi 13.56MHz, kaxxa fayyale qagaaqagi 860-930MHz, maykoroweev 2.45GHz, 5.8GHz, w.w. 13.56MHz system coil anteenah innal geytima, kee inductive coupling cogdat geytima, taamah aracal geytima, inkih tan 1.2m fanah yan, bandwidth kaadu Awroppa kee gersi rakaakayittel mango kilohertz fanah geytima. Laakin UHF (860～93Uh1Hz) kee Microwave (2.45GHz, 5.8GHz) taamah afkan, data lowsis kee anteenah lowsis lowsis abak, RFID lowsis fokkaaqoh arac tekke.

Tama warkatal xayyowteh tan RF circuit chip, Chartered 0.35μm 2P4M CMOS gexsit qokoltaah, Schottky diodes kee Elektrik lowsis gubat hayta porograam lowsis gubat hayta (EEPROM) lowsis gubat hayta. Schottky diodes lowsis gubat yan serial resistance kee forward voltage le, kaadu lowsis gubat yan RF input signal enerji DC lowsis gubat yan waqdi lowsis gubat yan lowsis gubat yan. Isotropic radiated power (EIRP) 4W (36dBm) kee anteenah 0dB takke waqdi, RF circuit chip 915MHz fanah taamitaah, 3m fanah yan uddur, taamah uddur 8μA fanah yan.

1 RF maroh rikkisso

UHF RF1D tabaatabsa chip, mangom raadiyok qagaaqagitak maroytaay, maknay kobor maroytaa kee EEPROM edde anuk. keenik fanak, baadal taysabbi qagaaqagih maroytih exxa kurruumam ciggiltah tan lafa le maroh moojuul: baaxoh addah ossillator kee saaqat horah maroyti, cayli-amol qagitak maroh, volteej mandabbah raceena, retteemah ramad kee wadirih fixix maroyta, massos, volteej lowsiisih kee amplitude moojuleeshin ( AM) demodulator, w.w tanimi. iroh anteenah exxaaxi matan except. Antenah exxa dipole xisneh addat geytimtaah, inkih tan chip inkih tan enerjih raceenah addat geytimta network fanah rectifier input impedance luk geytimta. Tamah inkih tan modelitte 2haytô footimal tablen.Dipole anteenah impedansih nummah exxa Rra kee Rloss kinni, Rra dipole anteenah radiation impedansi kinni, tamah dipole anteenah radiation impedansi kinni, inkih tan 73Ω, tamah anteenah radiation impedansih dudda kinnim tamixxige; Rloss ohmic qanxaffe bahtam birti anteena bicsoonuh edde yantifiqen amolladih dubuk laqna ginaanama. Antenna impedansi X exxah celsiisenta inkih tan positive kinni, sabab akak anteenah impedansi inkih tan inductive kinnim kee tama inkih tan inductanceh caddo inkih tan anteenah topology kee substrate uwwaytih addat tan. massoyse cayla milaagam xakabuh RF culmah asta DC gommodmali cayli raqte chip. Voltage regulator DC voltage caddol lowsis abak DC voltage magnitude lowsis abak chip lowsis abak lowsis abak geytima. AM demodulator edde yantifiqqem oyti asta yayyaaqeenimih quuki asta. Backscatter circuit transponder data RFID essero hinnay kardi qilmih qaynat RF qaynat wagsiisak sissin qaynatih qaynat wagsiisak sissin qaynatih qaynat wagsiisak sissin qaynatih qaynat wagsiisak sissin qaynatih qaynat wagsiisak sissin qaynatih qaynat wagsiisak. cayli-fakut qagitak maroh xoqoysil asele qagitak ginaanam asta inkih tan chiip. 13.56MHz fayya le caddoh (HF) transponder, 915MHz UHF transponder, lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan saaqat geytam madudda. too maroyti kalqoota inkih baxxaaqimele tiya tiyah gubal.

2 Daqar Margaqa kee Makeelo

2.1 massos kee gommodmali cayli lowsiisih maroytit

ta warkatal, Dikson kibim pambi kak yakkem Schottky diodes massos maroh innal xoqoysil asele. maroh eskemaatiik muuci qarwalik 3 yambulle. tah kah kinnim Schottky diodes addah tan ittallaklehresistance kee junction capacitance, tamah kaaduk RF input signal enerji DC caylih addat geytimta waqdi kaxxa korsiyyih dudda le, tohih taagah cayli lowsiisih addat geytimta. Inkih tan Schottky dayoditte ittat axawah tan poli-poli kapaasiteeritte. Vertikaal kapaasiteeritte lowsis gubat tan voltage Vin lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan DC lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan. Fayya le gommodmali cayli, gommodmali caylih xaloot:

VDD=n·(Vp,RF-Vf,D)

Vp, RF iyyaanam raadiyok sissin qaynatih asta elle culsan amplitude kinnim kee Vf, D iyyaanam Schottky diode iyyaanam fooca fanah yan voltage kinnim kee n iyyaanam charge pampi elle yantifiqen caddo kinni.

xakak DC gommodmali caylih awqenta massos yemeexege caddol, kee xakak le taamah gommodmali caylih xayyos inkih tan tiransponder chiip DC gommodmali caylih amplitude milaagime waytam xagar diggah afkanal tiransponder chip, kee takkem xiqtah tan chip shocks soolisaanam. sarit, tonnal kalaloonuh tatrus chip. maroyti oggoleh isih is-qangarah Kascndeh rikkisso. Tama circuit xisneh sababitte Cascnde xisneh isolation effect le, tamah kaadu meqem kaban lowsis gubat haanam, tohih taagah lowsis gubat haanam (PSRR) lowsis gubat haanam. namma luddih uddur rakiiboh xakak yasmitoonuh. dariifah giddakiino Q1 kee Q2 1:8. Toh tonnal anuk, inkih tan HF RFID transponderittek baxsa luk, lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan lowsis gubat tan.