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Hi everyone, How do I measure the complex port impedance of an UHF RFID port antenna? I have tried measuring differential port impedance using VNA with a probe, but the results do not seem to be correct. Thanks

Hello everybody, Can any one suggest an easy way to measure the complex impedance of an UHF RFID chip. Thanks

Passive UHF RFID tag antennas, use backscattering technique to communicate with the reader, tag antenna is also directly connected to the ASIC RFID chip with high capacitive impedance. therefore the tag antenna is designed to have a high inductive port impedance to conjugately match the RFID...

hi, thanks for your reply,i need the data to be very accurate, the values given in data sheets are frequency dependent. i am designing ultra thin platform independent antenna and accurate value of permittivity is important at UHF. i have been working on these antennas for about a year now. do...

hi, i need to design an UHF RFID tag antenna on 0.45mm thick Maylar the substrate is 450 micron Polyester, dose any one know how can i measure its dielectric permittivity at UHF (869mhz). thanks