US 6,184,760 B2 · Half-wavelength resonator type high frequency filter

Abstract

A half-wavelength resonator type high frequency filter has N half-wavelength resonators (where N is an integer not smaller than 2); an input terminal; an output terminal; first matching part for matching the first of the resonators to the input terminal; second matching part for matching the N-th of the resonators to the output terminal; and (N−1) interstage coupling part for coupling the resonators with one another, and wherein excitation positions of the first of the resonators and the N-th of the resonators are displaced from the center positions of the respective resonators toward an end thereof, and at least one of the interstage coupling part is electrically connected to its associated resonators at positions other than both ends thereof.

Claims7

Dependent claims

A half-wavelength resonator type high frequency filter comprising:

N half-wavelength resonators, wherein N is an integer ≧2;
an input terminal;
an output terminal;
first matching means for matching the first of said resonators to said input terminal;
second matching means for matching the N-th of said resonators to said output terminal;
and
(N−1) interstage coupling means for coupling said resonators with one another, wherein
excitation positions of said first of said resonators and N-th of said resonators are displaced from the center positions of the respective resonators toward an end thereof,
at least one of said interstage coupling means is electrically connected to its associated resonators at positions other than both ends thereof, and
said input and output terminals are tap-fed to said resonators via said first and second matching means.

7 more elements

Dependencies are inferred from the claim text.

Half-wavelength resonator type high frequency filter

Life of this patent

Half-wavelength resonator type high frequency filter

Life of this patent

Abstract

Claims7