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:
Sep. 12, 1995
Filed:
Jul. 20, 1994
Robert G Gels, Boston, MA (US);
William L Robbins, Newton Center, MA (US);
The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);
Abstract
The present invention provides a miniaturized multilayer microstrip antenna that includes a stack of antenna sub-stacks, a ground element, and a plurality of electrically conductive segments. Each of the antenna sub-stacks includes a pair of substantially parallel outer principal faces. A sandwich of two relatively thin electrically non-conductive substrate elements, separated by a relatively thin electrically conductive layer, extends between each pair of parallel outer principal faces. The electrically conductive layer has at least one void region through which an electrically conductive feedthrough element extends. The feedthrough element also extends between the outer principal faces. The ground element electrically couples the conductive layers of each of the antenna sub-stacks. The electrically conductive segments are positioned between adjacent principal faces of two adjacent antenna sub-stacks in the stack, and electrically connect the feedthrough elements of the adjacent antenna sub-stacks, thereby establishing a first continuous elongated antenna element.