The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 1997
Filed:
Mar. 16, 1993
Gary A Martek, Kent, WA (US);
Fred E Ashbaugh, Seattle, WA (US);
Innova Corporation, Seattle, WA (US);
Abstract
A diverging shall antenna fed by a waveguide supplying TE.sub.11 mode is described. A dielectric rod partially contained within the waveguide converts the TE.sub.11 mode to a dominant or HE.sub.11 mode. The HE.sub.11 mode is controllably converted to second and third order modes in the diverging shell by discontinuities placed in predetermined locations in the diverging shell. The discontinuities generating the second mode are incorporated into the dielectric rod structure. Turning of the relative amplitude and phase of the second and third order modes relative to the HE.sub.11 mode is achieved by slideably positioning the dielectric rod. An alternative embodiment of the inventive device includes a reactive surface of the diverging shell.