UHF EPC Gen2 RFID-Reader Design | ZHAW Institute for ...

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Portable Reader Design with Carrier Suppression

In UHF (Ultra High Frequency) RFID (Radio Frequency Identification) systems Rx (Receiver) is usually isolated from Tx (Transmitter) by a circulator or a directional coupler. Since tags become more sensitive in order to improve reading distance, the relatively poor isolation of 20dB - 30dB limits the tag to reader link. A way to improve a directional coupler's isolation is to mismatch the unused port to generate a carrier cancelling...

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Related topics : designing an uhf rfid reader antenna / uhf rfid reader antenna design / uhf rfid reader design / radio frequency identification rfid systems / ultra high frequency rfid reader