Patent ID: 6078230
Filing Date: 2000-06-20
Classification: H01P,Y10T

Abstract:
A method of adjusting characteristics of a dielectric filter with integral electromagnetic shielding, comprising the steps of:forming a dielectric body, the dielectric body having an outer surface;forming an external conductor on the outer surface of the dielectric body substantially completely covering the outer surface of the dielectric body so as to provide said integral electromagnetic shielding of said dielectric filter;forming at least one hole extending through the dielectric body, said at least one hole having a respective inner surface with a substantially constant cross-sectional shape along an axial direction of the corresponding hole and a respective internal conductor and a respective non-conductive portion at said inner surface, a respective surface of said corresponding non-conductive portion being substantially flush with said respective inner surface of the corresponding hole; andforming signal input and output electrodes on the outer surface of the dielectric body and electrically isolated from said external conductor for providing capacitive connection with said respective internal conductor in said at least one hole;the method further comprising the steps of:initially forming said respective internal conductor over an entire length of the inner surface of the corresponding hole; and thereaftergrinding off a portion of said respective inner conductor with a grinding tool in order to form said non-conductive portion.