H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 9/02 (2006.01) H01P 1/205 (2006.01) H01P 7/04 (2006.01)
Patent
CA 2140407
The invention relates to a dielectric resonator comprising a block (2) of dielectric material, having upper (9), lower and side surfaces and in which there is a hole(3a) extending from the upper surface to the lower surface. The hole (3a) and the lower surface as well as at least part of the side surfaces are coated with an electrically conductive material and at least the upper surface (9) is uncoated so that the hole (3a) thus forms a transmission line resonator. The uncoated surfaces are covered with a lid (5) of an electrically conductive material, whereby the dielectric block is substantially surrounded by an electrically conductive material. The resonator hole (3a) is composed of two portions, a straight portion (3a) beginning from the lower surface of the dielectric block as well as a wider portion (10) that is formed above the straight portion and opensinto the upper surface (9) of the dielectric block. Both portions are covered with an electrically conductive material and the coatings of both portions form a juncture. Formed above the resonator hole is a frequency tuning element (11), the first end of which is earthed, the other end being at a distance from the surface of the resonator hole, thus forming a capacitance between the earth plane and the upper end of the transmission line resonator.
Lk-Products Oy
Sim & Mcburney
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