A frequency selective limiter (FSL) is provided having a transmission line structure with a tapered width. The FSL includes a substrate having a magnetic material, a signal (or center) conductor disposed on the substrate and first and second ground plane conductors disposed on the substrate. The signal conductor having a first end with a first width and a second end with a second different width such that the signal conductor is provided having a taper between the first and second ends of the signal conductor. First and second ground plane conductors are spaced apart from first and second edges of signal conductor, respectively, by a distance that changes from the first end of signal conductor to the second end of signal conductor such that signal conductor, and first and second ground plane conductors form a co-planar waveguide transmission line.

Magnetoresistive effect device including magnetoresistive effect element which high-frequency filter can be realized is provided. Magnetoresistive effect device includes: at least one magnetoresistive effect element including magnetization fixed, spacer, and magnetization free layer wherein magnetization direction is changeable; first and second ports; signal line; and direct-current input terminal. First and second ports are connected to each other via signal line. Magnetoresistive effect element is connected to signal line and is to be connected to ground in parallel to second port. Direct-current input terminal is connected to signal line. Closed circuit including magnetoresistive effect element, signal line, ground, and direct-current input terminal is to be formed. Magnetoresistive effect element is arranged wherein direct current input from direct-current input terminal flows through magnetoresistive effect element in direction from magnetization fixed layer to magnetization free layer.

Magnetoresistive effect device including magnetoresistive effect element which high-frequency filter can be realized is provided. Magnetoresistive effect device includes: at least one magnetoresistive effect element including magnetization fixed, spacer, and magnetization free layer wherein magnetization direction is changeable; first and second ports; signal line; and direct-current input terminal. First and second ports are connected to each other via signal line. Magnetoresistive effect element is connected to signal line and is to be connected to ground in parallel to second port. Direct-current input terminal is connected to signal line. Closed circuit including magnetoresistive effect element, signal line, ground, and direct-current input terminal is to be formed. Magnetoresistive effect element is arranged wherein direct current input from direct-current input terminal flows through magnetoresistive effect element in direction from magnetization fixed layer to magnetization free layer.

The present disclosure relates to a tunable magnonic crystal device comprising a spin wave waveguide, a magnonic crystal structure in or on the spin wave waveguide, and a magneto-electric cell operably connected to the magnonic crystal structure. The magnonic crystal structure is adapted for selectively filtering a spin wave spectral component of a spin wave propagating through the spin wave waveguide so as to provide a filtered spin wave. The magneto-electric cell comprises an electrode for receiving a control voltage, and adjusting the control voltage controls a spectral parameter of the spectral component of the spin wave via an interaction, dependent on the control voltage, between the magneto-electric cell and a magnetic property of the magnonic crystal structure.

A wireless communication system including an electrically conductive passive medium capable of simultaneously propagating therealong electromagnetic first and second currents at different respective frequencies F1 and F2, the electrically conductive passive medium including an electrically conductive first passive linear medium portion adjacent an electrically conductive first passive nonlinear medium portion, the first passive nonlinear medium portion capable of generating an intermodulation current based on a nonlinear interaction between the first and second currents, the intermodulation current having a frequency Fi equal to nF1+mF2 and propagating along the first passive nonlinear medium portion, m and n being positive or negative integers; and a first magnetic film disposed proximate an electrically conductive external surface of the first linear medium portion, such that when the first and second currents propagate along the first passive linear medium portion toward the first passive nonlinear medium portion, the magnetic film reduces or prevents the generation of the intermodulation current in the first passive nonlinear medium portion by attenuating at least portions of the first and second currents.