Patent ID: 6794955
Filing Date: 2004-09-21
Classification: H01P

Abstract:
An advanced dielectric filter made up of resonators, such that said filter resonates a design frequency, said filter comprising:at least two T-shaped units coupled together; each of said T-shaped units including a #1 resonator, a #3 resonator and a #2 resonator coupled between said #1 resonator and #3 resonator, said #1 resonator and #3 resonator of each of said T-shaped units coupled together, each of said T-shaped units formed in an upside down T-shape and where said #1 and #3 resonators are at a bottom of said upside down T-shape and said #2 resonator is at a top of said upside down T-shape; and wherein because there is an odd number of resonators in each of said T-shaped units, the coupling of each of said T-shaped units is negative and each of said T-shaped units is a separate three pole filter; and wherein said #1 resonator of a first of said T-shaped units is an input, said #3 resonator of a last of said T-shaped units is an output, and said #3 resonator of said first T-shaped unit is coupled to said #1 resonator of each next T-shaped unit up to said last T-shaped unit.