Accession Number : ADD010612

Title :   Evanescent Resonator Frequency Multiplier.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Hartley,Joseph H

Report Date : 03 Nov 1983

Pagination or Media Count : 66

Abstract : This invention relates to a frequency multiplier for electromagnetic waves in which multiples of the input frequency propagate, while the input frequency evaneces. A rectangular waveguide or other suitable wave conveying element with a cut-off frequency above the input frequency but below the output frequency contains the multiplying structure. The input frequency is multiplied using a post located in the waveguide or other element adjacent to the source of input waves. The post may define a multiplier gap between one of its surfaces and a wall of the waveguide or other element, in which case the multiplier gap may contain a multipactor between its surfaces which generates multiples of the input frequency. The multiplier gap may alternatively contain a non-linear element responsive to a high electric field, such as a ferroelectric material, which also generates multiples of the input frequency. Alternatively, the post may be surrounded by a non-linear element of ferromagnetic material responsive to a strong magnetic field. In either embodiment, waves at the same frequency as the input waves cannot propagate, but waves above the cut-off frequency propagate through the waveguide or other element to an output aperture. (Author)

Descriptors :   *Patent applications, *Frequency multipliers, *Waveguides, *Harmonic generators, *Nonlinear systems, *Suppressors, Ferroelectric materials, Electric fields, Ferromagnetic materials, Magnetic fields, Bandpass filters, Electromagnetic wave propagation, Rectangular bodies, Resonators, Varactor diodes, Waves, Semiconductor diodes, Walls, Millimeter waves, Output, Schottky barrier devices, Input, Local oscillators, Frequency, Broadband, Materials, Ferrites

Subject Categories : Electrical and Electronic Equipment
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE