A substrate integrated matched load with embedded resistive thick film

A matched load in substrate integrated waveguide (SIW) technology is presented at K-band. An embedded resistive thick film is used to absorb the input signal. The proposed structure is fully compatible with standard multilayer printed circuit board processes. The realized SIW termination exhibits a bandwidth of 2.75 GHz with a return loss of more than 20 dB around 18.4 GHz.