01Ike carrier
Onye na-agụ na-emepụta carrier RF na-adịgide adịgide site na antennụ. Tag passive na-anakọta obere akụkụ nke ubi ahụ site na rectifier na charge pump dị n’ime chip. Chip na-eteta naanị mgbe ike e nwetara gafere oke nnabata (sensitivity threshold), ya mere anya, uru (antenna gain), mfu n’ọkpọ (cable loss), na ọnọdụ tag niile dị mkpa.
02Ndozi backscatter (Backscatter modulation)
Tag UHF passive anaghị emepụta akara redio transmitter ọhụrụ. Ọ na-agbanwe ibu (load) nke antennụ ya n’etiti ọnọdụ impedance dị iche iche. Nke a na-agbanwe otú e si egosipụta (reflected) carrier nke onye na-agụ, na-emepụta obere sidebands, nke onye na-anata (receiver) na-agbazi (demodulate) gaa na data RN16, EPC, TID, ma ọ bụ user memory.
03Ubi nso (near field) na ubi pụọ (far field)
Usoro LF na HF na-eji magnetic inductive coupling karịsịa n’ubi nso. RAIN RFID UHF na-eji electromagnetic propagation n’ubi pụọ. Na 915 MHz, ogologo ebili mmiri dị ihe dị ka 33 cm, ya mere ịgụ UHF n’ezie na-achịkwa site na propagation, reflection, polarization, na multipath.
04Ngụkọta njikọ
Ekwesịrị ka njikọ abụọ mechie. Link forward ga-ebunye ike RF zuru ezu iji mee ka tag rụọ ọrụ (activate). Link reverse ga-alaghachi backscatter zuru ezu ka ọ gafere sọọl nhịahụ (sensitivity floor) nke onye na-agụ. Ịgụ na-adịghị arụpụta nwere ike si n’akụkụ ọ bụla apụta, nke mere na ịgbanwe ike naanị anaghị emekarị ka deployment doo anya.
05Ihe onwunwe na detuning
Mmiri na-amịkọrọ ike UHF, ebe igwe anaghị agba ma ọ bụ na-eme ka tag dipole nkịtị gbanwee ugboro (detune). Tag n’elu igwe na-agbakwunye spacer ma ọ bụ nhazi e tụrụ ya nke ọma; tag akwa (textile) na-eji geometry nke antennụ na-adịgide ọbụna mgbe e gbachara; ngwaahịa mmiri mmiri (liquid products) na-abụkarị chọrọ ka e dobe tag n’ebe na-adịghị nso ụzọ nwere mfu kachasị ukwuu.
06Nleba nchekwa mgbochi-ijikọta (Anti-collision inventory)
N’ebe a na-agụ ọtụtụ n’otu oge, onye na-agụ anaghị anụ otu tag dị ọcha n’otu n’otu. EPC Gen2 inventory rounds na-eji slotted anti-collision. Tag na-ahọrọ slot, zaa na RN16 nke a họpụtara n’enweghị usoro, wee kpughee data EPC mgbe e gakwuru ya (acknowledgement). Session flags na-enyere aka ijikwa ka tag ndị a ga-aga n’ihu zaa.
Otu o si arụ ọrụ
Ọtụtụ sistemụ RFID na-arụ ọrụ na ụkpụrụ 'Reader-Talks-First'. Onye na-agụ na-ewepụta ebili mmiri na-aga n'ihu (CW) nke ike RF. Mgbe tag na-abanye n'ọhịa a, ọ na-eme ka ọ dị ike ma na-agbanwe ntụgharị nke ebili mmiri a iji gwa azụ.
Ụzọ njikọ
Inductive Coupling (LF/HF): Na-eji magnetic field. The reader coil na tag coil na-etolite transformer. Na-arụ ọrụ naanị na nso nso (Near Field).
Radiative Coupling (UHF): Na-eji electromagnetic waves. Tag na-egosipụta akụkụ nke ike na-abata azụ na onye na-agụ (Backscatter). Na-enye ohere maka nkwurịta okwu ogologo oge (Far Field).