Tuning of reconfigurable antennas by motion detection

In this paper we propose a new approach that tunes reconfigurable antennas by detecting motion in a specific location. The tuning circuit is based on an infra red (IR) emitter and another IR sensor that detects movement in a specific area and generates a predetermined voltage. This generated voltage can later be changed via a potentiometer to tune the antenna. The whole biasing circuit is software controlled by an “arduino” board, portable and powered by batteries. In this paper we show how this circuit can also be used to bias varactors integrated on a reconfigurable “filtenna” structure.