Absorptive Filters in the Realization of RCIED Activation Jamming

This paper presents the realization of absorptive filters in RCIED activation jammer. The measured filter characteristics satisfactory agree with the simulated characteristics. The main goal is to achieve sufficient degree of reflected signal attenuation (absorption), and not to provide high signal attenuation in stop-band in forward direction. It is proved that for such behaviour it is enough to implement simple first-order bandpass absorptive filters. These filters are realized as lumped (RLC) structures for relatively lower frequencies and as microstrip filters for higher frequencies. The jammer with the embedded absorptive filters is verified for military applications.