| Two types of planar 4-way power divider/combiners denoted as "cascaded three-port" and "common junction" hybrid stripline designs, realized on Rogers Ohmega-Ply{dollar}sp{lcub}rm TM{rcub}{dollar} dielectric substrate have been investigated for 2 to 18 GHz applications.; Experimental results of cascaded three-port hybrid power dividers show an increased VSWR and insertion loss caused by a distributed shunt capacitance generated at the junction where two transmission lines meet.; A five-port power divider/combiner where power division or combination occurs at a single junction is presented. It is shown that an "optimum" junction impedance exists.; A single transformer section power divider fabricated on Rogers Ohmega-Ply{dollar}sp{lcub}rm TM{rcub}{dollar} dielectric substrate shows an increase in the input port VSWR and insertion loss caused by a shunt capacitive effect at the conductor/resistor interface, due to the transmission line like behavior of the selectively etched isolation resistor. Transmission line and distributed RC network models of the isolation resistor are presented. |
