This paper presents a Substrate Integrated Waveguide leaky-wave antenna. The new topology makes use of one of the fundamental characteristics of this synthetic waveguide, namely, its property to generate leakage loss when the period length is sufficiently large. A design method, based on the transverse resonance technique, is presented and validated with a full-wave simulation. Inherent limitations of this structure are also exposed. We demonstrate that, in order to design efficient antennas, there is a maximum value related to the substrate permittivity. We also establish that a leaky-wave antenna cannot be designed in the upper band of a waveguide with commercially available substrates. Index Terms-Leaky-wave antenna, Substrate Integrated Waveguide (SIW), transverse resonance technique.0-7803-9433-X/05/$20.00 ©2005 IEEE.APMC2005 Proceedings

A MEMS meander monopole antenna is fabricated in the form of a folded microstrip on the upper and bottom surfaces of the substrate. This design is based on the meander line principle with a three-dimensional structure to achieve reduced size compared to many other small size printed antennas. The MEMS technologies, such as excimer laser drilling and copper electroplating were used in the fabrication of this antenna. This antenna can be mounted on the silicon wafer by anodic bonding technology. The design features 2.45 GHz operating frequency with 190 MHz bandwidth for WLAN applications. The geometric length of the antenna is 21 mm, and the width is 4 mm. Measured results have good agreement with simulation data.