MODIFIED LOOP ANTENNA WITH OMNIDIRECTIONAL RADIATION PATTERN AND OPTIMIZED PROPERTIES FOR USE IN AN RFID DEVICE

摘要

The present invention relates to an antenna for use in an RFID device or remote sensor. The radiation emitted by the RFID device antenna is a combination of an electrical and a magnetic dipole radiation. The antenna is formed by two conductors that run curvedly enclosing close to each other and may be formed by circular arcs and/or straight portion. The antenna according to the invention has a simple structure, yet offering ideal properties for most remote identification applications: an omnidirectional antenna allowing the read operation of an RFID device from any direction; small size; sufficiently wide bandwidth; matching of the antenna with the rectifier of the RFID device microchip without any discrete circuit elements; high efficiency; easy−to−modify construction; and freedom from critical dimensional manufacturing tolerances.