Metal-Mountable Microstrip RFID Tag Antenna for High Impedance Microchip

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Koskinen, Tomi; Rahmat-Samii, Yahya (Electrical Engineering Department, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA)

This paper presents a metal-mountable RFID (Radio Frequency Identification) tag antenna, which operates at the 902–928 MHz UHF band. The antenna has a simple, low-profile (1.8 mm thick) structure. It consists of two microstrip patches, which are positioned near each other by a narrow gap and driven by a high impedance microchip. We show simulation and measurement results including impedance, read range, and radiation pattern measurements. Impedance measurements are carried out by using a differential s-parameter method. Acceptable read range is approx. 10 m in free space and 4 m on metal.