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Time domain response of a UWB dipole array for impulse based chipless RFID reader

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2 Author(s)
Koswatta, R.V. ; Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, VIC, Australia ; Karmakar, N.C.

The time domain response of an ultra-wideband (UWB) 2 × 2 element dipole array is presented. The antenna is an elliptically shaped dipole array with a circular back reflector. It is operating over 3.9-9.5 GHz frequency band with >;9 dBi gain and 40° average 3 dB beamwidth. The forward transmission coefficient (S21) vs frequency of two identical antennas were measured at a fixed distance. The measured data is transformed to time domain to calculate the transient response of the antenna. Measured transient response of the antenna shows good time domain response with a sharp peak and a low ringing time. Experimental verification of the time domain performance shows good agreement with the measured results. The antenna is suitable for using as reader antennas in reading multi-resonator based chipless RFID tags with pulse based interrogation techniques.

Published in:

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Date of Conference:

5-8 Dec. 2011