Near Field RFID tag antenna

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sun&moon

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Where can I find the near field RFID tag antenna model in HFSS?

Anyone has recommendations?
 

what s your frequency?

if it is 860-920 Mhz.(cos structure size) Try to model it wit ansoft designer. not HFSS. it ll be easier. and near field excited with loop lined up to chip. so just examine the commercial tags. after that you need the impedance of chip and suitable loop lenghts.

good luck.
 

Thanks. Frequency will be 860-920 Mhz. I would like to know the design steps.

1 Simulate structure, get the tag impedance, using chip impedance value and tag impedance to calculate return loss, the return loss should be >10 dB over 860-920MHz

2 check the near field to know more about the meachanism of antenna. What prameters should I check?


The step one is right? How to get read distance for near field?

Anyone can gives me some instructions? very confused.
 

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