Difficulties in grounding a non-integral, deep drawn resonator (DDR) to the filter body of a cavity may be substantially eliminated by preventing the movement of the DDR away from a grounding contact area on the filter body. The addition of a compression plate and stop limiter in the connection of the non-integral DR to the filter body helps insure that any such movement is eliminated or substantially reduced.

A rod-switched tunable resonator includes a housing defining a cavity, a first rod disposed within the cavity, a second rod disposed within the cavity, and a switch connected to the first rod and to the second rod to tune the resonator to one of a plurality of frequencies by connecting or disconnecting one or both of the first and second rods to the housing. A tunable filter may be fabricated using two or more such resonators. The rod-switched tunable resonator may be a combline resonator, coaxial resonator, waveguide resonator, or dielectric resonator.

A rod-switched tunable resonator includes a housing defining a cavity, a first rod disposed within the cavity, a second rod disposed within the cavity, and a switch connected to the first rod and to the second rod to tune the resonator to one of a plurality of frequencies by connecting or disconnecting one or both of the first and second rods to the housing. A tunable filter may be fabricated using two or more such resonators. The rod-switched tunable resonator may be a combline resonator, coaxial resonator, waveguide resonator, or dielectric resonator.

A frequency variable filter includes variable resonators aligned in a predetermined direction, a coupling part configured to couple the adjacent variable resonators, and a coupling variable dielectric. The variable resonator includes a resonator and a frequency variable dielectric disposed in a movable state relative to the resonator, and is configured to be able to change a resonance frequency according to a position of the frequency variable dielectric with respect to the resonator. This applies to aligned variable resonators other than this variable resonator. The coupling variable dielectric is disposed in a movable state with respect to the coupling part and configured to adjust a coupling coefficient according to an amount of insertion into the coupling part. The coupling variable dielectric is disposed so that a movable surface of the coupling variable dielectric is on the same plane as a movable surface of the frequency variable dielectric.

A frequency variable filter includes variable resonators aligned in a predetermined direction, a coupling part configured to couple the adjacent variable resonators, and a coupling variable dielectric. The variable resonator includes a resonator and a frequency variable dielectric disposed in a movable state relative to the resonator, and is configured to be able to change a resonance frequency according to a position of the frequency variable dielectric with respect to the resonator. This applies to aligned variable resonators other than this variable resonator. The coupling variable dielectric is disposed in a movable state with respect to the coupling part and configured to adjust a coupling coefficient according to an amount of insertion into the coupling part. The coupling variable dielectric is disposed so that a movable surface of the coupling variable dielectric is on the same plane as a movable surface of the frequency variable dielectric.

An electronic component includes two or more first parallel resonators arranged in an orthogonal direction orthogonal or substantially orthogonal to a lamination direction, each first LC parallel resonator including a first inductor and a first capacitor, two second LC parallel resonators surrounding the two or more first LC parallel resonators from both sides in the orthogonal direction, each second LC parallel resonator including a second inductor and a second capacitor, a second capacitor connected to one end of the two second LC parallel resonators, and a first connecting conductor that connects two of the first LC parallel resonators that are not adjacent in the orthogonal direction, or connects one of the first LC parallel resonators and one of the second LC parallel resonators that are not adjacent in the orthogonal direction.

One or more adjustable resonators (208, 209) of a compensation circuit are arranged so that adjusting the resonators nevertheless results in output of the circuit remaining substantially constant. This has been accomplished by separating resonator cavities that include the adjustable resonators by a partition wall. A coupling aperture (205) provides inductive coupling between the resonator cavities and a capacitive part (206) passes through the intermediate wall and provides a capacitive coupling between the resonator cavities. The capacitive part is conductive and electrically isolated from the partition wall. The capacitive part and the coupling aperture are dimensioned such that effects on the coupling band width of the aperture and capacitive couplings track each other so as to substantially cancel each other out, and that the coupling band width between the resonator cavities remains substantially constant.

A resonator according to the invention includes an Inner conductor. The resonator has a easing comprising walls, a lid and a bottom shell within which there is a resonator cavity. The Inner conductor is in said resonator cavity. The Inner conductor is a conductive material formed with a base portion having a first end and a second end having a first end attached to a surface of the resonator cavity galvanically, in addition, the inner conductor has two or more elongate conductive materials forming resonator parts having a first end and a second end, and the resonator pasts first end is galvanically secured to the base portion at one end and the other end is galvanically separated from the resonator cavity inner surface. The characteristics of the resonator parts are selected so that each produces its own resonance width. These properties Include, for example, size, shape, orientation, material, and their different combinations.

A resonator according to the invention includes an Inner conductor. The resonator has a easing comprising walls, a lid and a bottom shell within which there is a resonator cavity. The Inner conductor is in said resonator cavity. The Inner conductor is a conductive material formed with a base portion having a first end and a second end having a first end attached to a surface of the resonator cavity galvanically, in addition, the inner conductor has two or more elongate conductive materials forming resonator parts having a first end and a second end, and the resonator pasts first end is galvanically secured to the base portion at one end and the other end is galvanically separated from the resonator cavity inner surface. The characteristics of the resonator parts are selected so that each produces its own resonance width. These properties Include, for example, size, shape, orientation, material, and their different combinations.

A coaxial filter having a frame construction comprises at least one filter frame, which consists of an electrically conductive medium and comprises a receiving space. A cover arrangement closes the receiving space on all sides. At least one first resonator internal conductor is arranged in the receiving space. The at least one first resonator internal conductor is galvanically connected to a face of the at least one electrically conductive filter frame, and extends therefrom in the direction of another, in particular opposing face of the electrically conductive filter frame, and ends at a distance from the opposing face of the electrically conductive filter frame and/or is galvanically separated from the opposing face of the electrically conductive filter frame.