Filter

Abstract

Abstract PURPOSE:To simplify the manufacture, to improve the characteristic and the yield by providing a dielectric block having a blind hole and conductive surface to the inner and side faces of the hole and a couple of electrodes coupled with the conductive surface in terms of capacitance. CONSTITUTION:The dielectric block 12 having at least a blind hole 11 from the top face toward the bottom face with a conductive surface 13 at the inner and side faces of the hole 11 and a couple of electrodes 14, 14 fixed to the dielectric block 12 so as to be coupled capacitively to the conductive surface 13 formed to the bottom face of the blind hole 11 of the dielectric block 12 are provided. With a distance (y) between the hole 11 and the conductive surface 13 at the side face increased, the capacitance is increased and the characteristic impedance is reduced, and when a diameter (z) of the hole 11 is decreased, the inductance is increased and the characteristic impedance is increased. Thus, a filter with an optional characteristic is obtained by varying the values y, z properly. Moreover, the filter is made of a single dielectric block and the manufacture process is simplified.

Inventors

• 👤 Toyotaro Sawa
• 👤 沢　豊太郎

Bibliographic Details