Efficient Wireless Level Identification Technique Based on Discrete Electromagnetic Coupling and Radiation

The design and the performance of a new approach of wireless level identification system are presented in this paper. This research is performed based on discretization technique of the electromagnetic field radiation pattern. The distribution of radiation intensity changes from the point-to-point if any identical electrical element is moving in the vicinity of the range of transceiver and it is used to approximate the level of specific fluid carrier. Very simple technology with a dipole antenna as transceiver and two passives ultrahigh-frequency (UHF)-tag as reflectors are used. The resistive duplexer is used for the coupling of transceiver and receiver circuits. The average level detection error is approximated to be 0.5% up to the level distance of 50 cm.