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:
Aug. 18, 1998
Filed:
Feb. 06, 1997
Abstract
A dielectric resonator includes a cylindrical hole formed in the intersection of two resonator elements forming a TM dual-mode dielectric resonator element. The hole extends in a direction across the thickness of the TM dual-mode dielectric resonator element. Furthermore, a quadrangular pyramid-shaped hole having a closed end is formed in each connecting part between each resonator element and a cavity wall so manner that each hole extends from the outer surface of the cavity wall toward the inner portion of each resonator element, wherein the inner wall of each hole is covered with a conductor electrically connected to a cavity conductor. The shapes of the above holes are determined so that the TM dual-mode dielectric resonator element has the same resonance frequency for both TM 110 and TM 111-modes. The above arrangement makes it possible to provide a low-cost high-performance dielectric resonator having characteristics similar to those of a three-mode dielectric resonator, which can be produced in a small overall size.