A magnetic resonant loop antenna to enhance the operating distance of 13.56MHz RFID systems

Abstract

A magnetic resonant loop antenna enhancing the operating distance by improving the wireless power transfer efficiency of 13.56MHz RFID system was proposed. The proposed resonant antenna consists of resonant coils arranged between source coil and device coil coupled to each of them. The effects of resonant coils were measured using a 13.56MHz RFID reader and tag system in addition to simulation using RF simulator. The measurement results from RFID reader and tag show that the maximum operating distance is increased by approximately 96% and amplitude of receiving voltage on the RFID tag antenna is increased by 18% thanks to the magnetic resonance loop antenna.

A Twisted Loop Antenna to enhance HF RFID detection for different tag positioning

“…However, the radiofrequency link based on magnetic mutual coupling between reader and tag antenna, often loops antenna, is still a complex challenge to improve the system. Detection range and areas are considered an assessment factor for RFID system performances [1] [2]. The detection of the tag is performed when its effective surface has generated enough power to supply the RFID tag chip, by integrating the magnetic field generated by the reader loop current.…”

Development of a Magnetic Loop Antenna for the Detection of Jovian Radiowaves at 20.1 MHz

“…The isoloop antenna is commonly used in earth's HF radio communications by amateurs or in military communications, due to its high factor of quality and its versatility, which makes it very effective for the modulation, transport and installation issues. In spite of that, it can also be found in diverse projects as the identification by radiofrequency (RFID) [12], wireless biomedical instrumentation [13], and different applications of radio frequencies and communications [14].…”