A dual band CRLH substrate integrated waveguide leaky wave antenna

This paper presents the application of a substrate integrated waveguide (SIW) for the design of a leaky wave antenna radiating simultaneously in two independent frequency bands. The antenna is based on a compensated right-left handed SIW transmission line. Due to this, the direction of the main lobe of the antenna radiation pattern can be steered by changing the frequency from backward to forward direction. The structure novelty is in a dual band operation. The characteristics and radiation aspects of the antenna are discussed. The measured antenna characteristics are in good agreement with those predicted by the simulation. Due to the SIW technology, the antenna is suitable for integration into T/R circuits and antenna arrays.