Joseph H Hartley

US Patent:

45271372, Jul 2, 1985

Filed:

Oct 24, 1983

Appl. No.:

6/544764

Inventors:

Joseph H. Hartley - Jackson NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01P 512
H01P 120

US Classification:

333137

Abstract:

A frequency multiplier for electromagnetic waves in which multiples of the input frequency propagate, while the input frequency evanesces. 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.