As a part of the importance of modern communication systems, multi-band planar micro-strip antenna technology and broadband, ultra wideband methods have been more and more concern and attention, and because of modern communications systems, especially UWB systems, occupy a wide bands usually, interfere other equipment in this band. Therefore, higher requirements and compatibility is requested among systems. A multi-band planar antenna and a ultra-wideband antenna with stop-band characteristics is designed t...