A novel ultra-wideband (UWB) multiple-input multiple-output (MIMO) Vivaldi antenna with dual band-notched characteristics is presented and fabricated. The antenna is comprised of an improved ground plane and two microstrip feeding lines with a compact size of $26\times 26$ mm2. The evolutionary process of the antenna is given. https://allfixelectricales.shop/product-category/consumer-electronics-tool-set/