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. 18, 1996
Filed:
Jun. 10, 1994
Felix Schwering, Eatontown, NJ (US);
James W Mink, Raleigh, NC (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A slab dielectric waveguide for the millimeter and sub-millimeter wave regions is achieved by providing a thin grounded dielectric slab of rectangular cross-section into which a sequence of equally spaced cylindrical lenses are fabricated. The axis of these lenses coincides with the center line of the slab guide, i.e. the propagation direction of the guide. The spacing of the lenses S is assumed to be on the order of many guide wavelengths .lambda.; the width of the slabguide w is on the order of at least several .lambda.; and the thickness d of the guide typically is sufficiently small so that only the fundamental surface wave mode can exist on the slab. If the permittivity of the lenses exceeds that of the guide, the lenses will have a convex shape and in the opposite case, the lenses will have a concave shape. As those skilled in the art will appreciate, the concave shape will simplify the fabrication of guide and will reduce its diffraction losses.