Ultra‐wideband power divider using three parallel‐coupled lines and one shunt stub

An ultra‐wideband power divider with out‐of‐band filtering and DC blocking functions is presented. The divider consists of three parallel‐coupled lines, a short‐circuited shunt stub and a resistor. The divider was implemented in a two‐layer printed circuit board with a high dielectric constant. The measurements show a minimum insertion loss of −0.4 dB in the middle band and a rejection of −17 to −18 dBc at 1.5 and 11.5 GHz, respectively.