{Reference Type}: Journal Article
{Title}: Multilayer UWB bandpass filter using liquid crystal polymer technology.
{Author}: Aliqab K;
{Journal}: Sci Rep
{Volume}: 14
{Issue}: 1
{Year}: 2024 Jul 8
{Factor}: 4.996
{DOI}: 10.1038/s41598-024-66928-8
{Abstract}: This proposed design presents a novel bandpass filter employing a Marchand balun to attain ultra-wideband (UWB) performance extending from 3.1 to 10.7 GHz with 6.8 GHz central frequency and 110% FBW. The UWB bandpass filter's fractional bandwidth can be tailored owing to the diverse input/output impedances of the planar Marchand balun. This adaptability is accomplished by connecting two planar Marchand baluns consecutively, leveraging the concepts of transversal filter ideas and multilayer LCP technology resulting in 0.3 dB and 12 dB insertion and return losses respectively. In-depth guidelines for the formulation and synthesis of the UWB bandpass filter are incorporated.