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:
May. 07, 2002
Filed:
May. 28, 1996
Kenji Kamogawa, Yokohama, JP;
Tsuneo Tokumitsu, Yokosuka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A multifrequency-band microstrip antenna, for use in microwave to millimeter-wave band, is provided with different thicknesses of dielectric films to optimized the performance in any operating frequencies desired. In a double lamination antena substrate, for example, lamination is made up of a number of dielectric films having a given dielectric constant and thickness, and lamination is made up of a number of dielectric films of another given dielectric constant and thickness. An radiation element is provided between the films in lamination , and a ground plane is provided between the films in lamination . A strip conductor for propagating radio signals is provided in lamination such that the ground plane intervenes between the radiation element and the strip conductor, thereby shielding the radiation element except for a slot formed in the ground plane. The input signal couples to the radiation element through the slot, thereby feeding the radiation element and operating the microstrip antenna.