Interferogram Control in a Meta-Interferometer with a Metastructure of Linear Wires as a Reflector of a Fabry–Perot Cavity

A method for selective control of multiband filtering of microwaves in the 3–6 GHz range has been proposed and tested. It is based on the use of a metastructure as one of the reflectors of a Fabry–Perot cavity of a modified h -plane waveguide-tee interferometer. The metastructure consists of an array of linear resonant wires in combination with an orthogonally and asymmetrically located copper strip with a break, loaded with a control element (varactor or fixed capacitance). The possibility of selective frequency and depth control of the interference stop-band in a three-band Fabry–Perot cavity and a modified seven-band tee interferometer has been discovered. The retuning of the cavity and interferometer bands is shown to be associated with the influence of resonance in a metastructure and occurs when the resonance frequency in the metastructure approaches the corresponding interference fringe.