Controllable microwave transmission in rectangular periodically corrugated waveguide

This experimental investigation reveals a new mechanism for controlling microwave transmission in periodically corrugated waveguide. The measurements show that location of the stopband in the frequency spectrum as well as its width depends on the relative position of two corrugated walls. The stopband and hence transmission vary from zero to a maximum value upon shifting of one periodic wall with respect to another on the half period of the corrugation. The results confirm the theoretical prediction of such spectrum transformation. The experiment demonstrates that the structure can be used to control power transmission in different microwave, photonic and electronic devices