Analysis of RCS Signatures of Chipless RFID Tags Based on Arabic Alphabet Letters with Punctuation
Keywords:
Arabic letters, chipless, co/crosspolarization, RCS signature, RFIDAbstract
In this paper, we investigate chipless RFID (Radio Frequency Identification) tags based on Arabic Alphabets with points, to be used as RF coding particles. First, the tags were designed by considering an Arial font to generate the metallic letters printed on flexible Kapton substrates. Next, the points were connected to form the main bodies of the letters to improve their Radar Cross Section (RCS) signatures when illuminated with incident electromagnetic waves within the frequency band of 2-8 GHz, for both horizontal and vertical polarizations. Good agreement between simulated and measured results has been obtained. We have found that among all of the similar letters studied, those stripline connections provided us the best way to take into account of the presence of the points and then conveniently distinguish the RCS signals characterizing each letter with a unique RF response. Finally, a lookup table for the identification of the 18 letters with punctuation that have been studied has been carried out.
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