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:
Feb. 23, 1999
Filed:
Mar. 10, 1997
Nobuaki Tanaka, Nagaokakyo, JP;
Murata Manufacturing Co. Ltd, Kyojo, JP;
Abstract
An antenna having a high gain, of small-size, and capable of setting the radiation direction of electromagnetic waves in a desired direction. The antenna also allows electromagnetic waves to be radiated stably. The antenna has a first planar conductor shaped like a flat plate. Disposed on the first planar conductor is a bar-shaped dielectric strip having one end connected to a waveguide or a transmission circuit and the other end being an open end which does not reach the position of openings in a second covering planar conductor. The end surface of the open end of the dielectric strip is shaped like a flat surface, and a column-shaped dielectric resonator is disposed at the open end side on the extension axis of the dielectric strip. A surrounding member is provided around the side of the dielectric resonator so as to surround it with a space therebetween. Further, a second planar conductor is disposed so as to cover the top surfaces of the dielectric strip, the dielectric resonator and the surrounding member. The second planar conductor has two rectangular-shaped openings above the dielectric resonator so as to be parallel to the extension axis along the length direction of the dielectric strip and to a line symmetry of the strip.