SIW cavity-backed patch antenna for Ku band applications

A broadband cavity-backed microstrip patch antenna in Ku Band is designed. In particular, in order to increase the operating bandwidth a modified rectangular patch having truncated corners and two cuts in the lateral sides has been conceived. The substrate integrated waveguide (SIW) technology is chosen to realize the cavity below the patch allowing low-cost implementation, fast prototyping, and precise manufacturing. Accurate electromagnetic investigation has been performed by using two different 3D tools: CST Microwave Studio^® and ANSOFT HFSS^®. The performance and efficiency of the proposed antenna have been evaluated in terms of radiation pattern, bandwidth, and matching. Results show that the antenna could be used for future applications in digital radio, TV broadcast and broadband internet services. Further work will be devoted to prototype fabrication and optimization.