WAVEGUIDE BAND-ELIMINATION FILTER Russian patent published in 2005 - IPC

FIELD: microwave engineering.

SUBSTANCE: proposed band-eliminating filter designed for attenuating definite spectral component in rectangular-guide microwave plumbings has case made in the form of rectangular waveguide section and dielectric resonator in the form of straight circular cylinder disposed inside case close to one of its narrow walls so that its butt-end surfaces are parallel to this wall. Dielectric resonator is coaxially secured on end of dielectric rod passed through respective hole in narrow wall of case and coaxially joined through its other end with butt-end of adjustment bushing disposed inside clamping unit joined with same wall on external side of case. Clamping unit is so designed that in its released state adjustment bushing is free to move in longitudinal direction within this clamping unit and in its clamped state adjustment bushing is locked within this unit on opposite end of dielectric rod. Thickness L₁ of this wall of case at its junction point with clamping unit, length L₂ of clamping unit between its point of junction with case wall and point of adjustment bushing locking therein, length L₃ of adjustment bushing between point of its junction with dielectric rod and point of its locking in clamping unit, length L₄ of dielectric rod, and coefficients of linear expansion α₁, α₂, α₃, of case, clamping unit, adjustment bushing, and dielectric rod materials, respectively, are interrelated by equations given in description of invention.

EFFECT: provision of resonance-frequency temperature control.

2 cl, 2 dwg