Patent ID: 6441705
Filing Date: 2002-08-27
Classification: H01P

Abstract:
A decoupling filter for high frequency transceivers of the type of self-compensation in temperature realized on a body provided with a plurality of resonance cavities, inside of which a corresponding adjustment disc is lodged in a removable and coaxial way, the latter being provided with a support stem coming out of a passage hole realized at the top of each cavity, said passage hole being threaded, and having at least one brush having a portion engaged in the hole, and inside of said bush the stem of the disc is housed, characterized by the association of different materials with different values of the thermic linear expansion factor of the following elements:said stem and said disc are realized with a material having a linear thermic expansion factor in the range of 23-24 ppm; said bush is realized with a material having a linear thermic expansion factor in the range of 3 ppm; said body is realized with a material having linear thermic expansion factor in the range of 10-14 ppm.