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On the Design and Implementation of Efficient Antennas for HF RFID Readers
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  • Ernest Ofosu Addo,
  • Benjamin Kommey,
  • Andrew Selasi Agbemenu,
  • Hermann Kumbong
Ernest Ofosu Addo
University of Siena
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Benjamin Kommey
Kwame Nkrumah University of Science and Technology College of Arts and Social Science
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Andrew Selasi Agbemenu
Kwame Nkrumah University of Science and Technology
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Hermann Kumbong
Kwame Nkrumah University of Science and Technology
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Abstract

This paper describes an in-depth methodical approach to the development of efficient high frequency (HF) antennas for usage in radio frequency identification (RFID) systems operating at 13.56MHz. It presents brief theory relevant to RFID communication and sets up a framework within which features and requirements of antennas are linked to key design parameters such as antenna form-factor and size; RF power level, materials and communication protocol. Tuning circuits necessary to adjust the resonance and power matching characteristics of antennas for good transponder interrogation and response recovery are discussed. To validate the approaches outlined, a complete step-wise antenna design and measurement described. Common practical problems that are often encountered in such design processes are also commented on.