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:
Apr. 07, 1998
Filed:
Jun. 01, 1995
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
A frequency adjustment mechanism for a dielectric resonator in which a change of a unloaded Q is small by adjustment of a resonating frequency, a tuning rod may be stably fixed in place after the adjustment without using any adhesives or the like and it is possible to readily perform the re-adjustment. A hole 14 is provided at an axially central portion of the dielectric resonator 11 and the tuning rod 15 is threadingly inserted into the hole 14. A female screw thread 14a is formed in an inner circumferential surface of the hole 14, and a male screw thread 15a is formed on an outer circumferential surface of the tuning rod 15. Resin layers 16 and 17 are formed on surfaces of the female screw thread 14a and the male screw thread 15a, respectively. The tuning rod 15 is made of dielectric material having a low loss and a high dielectric constant. The resin layers 16 and 17 are made of resin material having an elasticity and a low loss.