COMPACT UWB MIMO VIVALDI ANTENNA WITH DUAL BAND-NOTCHED CHARACTERISTICS

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 Mop Wringers and two microstrip feeding lines with a compact size of $26 imes 26$ mm2.The evolutionary process of the antenna is given.By etching t

Wood is of crucial importance for man and biosphere.In this mini review, we present the fundamental processes involved in tree-ring formation and intra-annual dynamics of cambial activity, along with the influences of the environmental factors.During wood formation, new xylem cells produced by the cambium are undergoing profound transformations, pa