Amplitude and phase modulation in fin-lines by electrical tuning
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorCarmine Vittoria
Life of this patent
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Abstract
A fin-line waveguide device for modulating signals passing therethrough. The device comprises a fin-line waveguide including two channel members longitudinally extending in the direction of signal propagation through the device. The channel members are physically and electrically separated by a ferrite dielectric slab which is oriented in a longitudinally extending plane parallel to the electric field lines of the signal passing through the device. A magnetic field is applied to the ferrite slab to magnetically bias the slab to ferromagnetic resonance. A voltage is applied across the ferrite slab to alter the ferromagnetic resonance characteristics of the slab. The phase and amplitude of the signal passing through the waveguide are modulated in response to the applied voltage.
Claims18
A fin-line waveguide device for modulating an electromagnetic signal passing therethrough comprising:
- a waveguide including first and second channel members, said channel members longitudinally extending in the direction of signal progagation through said waveguide;
- a ferrite dielectric slab disposed in said waveguide between said first and second channel members to approximately longitudinally bisect said waveguide, said ferrite slab electrically separating said first and second channel members, said ferrite slab being oriented in a longitudinally extending plane parallel to the electric field lines of said electromagnetic signal passing through said waveguide;
- means for producing a magnetic field in said ferrite slab and for magnetically biasing said ferrite slab to approximately ferromagnetic resonance;
- and
- means coupled to said ferrite slab for applying a voltage across said ferrite slab and for altering the ferromagnetic resonance characteristics of said ferrite slab in response to said voltage;
- wherein the phase angle of said signal passing through said waveguide is modulated in response to said voltage.
A method of making a fin-line waveguide device for modulating an electromagnetic signal passing therethrough comprising the steps of:
- providing a fin-line waveguide including first and second channel members longitudinally extending in the direction of signal propogation through said waveguide, said first and second channel members being physically and electrically separated by a longitudinally extending ferrite dielectric slab, said ferrite slab being directed in a longitudinally extending plane parallel to the electric field lines of said electromagnetic signal passing through said waveguide;
- applying a magnetic field to said ferrite slab to magnetically bias said ferrite slab to approximately ferromagnetic resonance;
- and
- applying a voltage across said ferrite slab to alter the ferromagnetic resonance characteristics of said ferrite slab in response to said voltage;
- wherein the phase angle of said signal passing through said waveguide is modulated in response to said voltage.
Dependencies are inferred from the claim text.