Dielectric coaxial resonator

A dielectric coaxial resonator comprising:

• a dielectric substance having first and second end portions traversing the center line thereof;
• a groove formed in the first end portion of said dielectric substance of the resonator and coaxially with the center line of said dielectric substance to define a double walled portion;
• a through hole, formed in said dielectric substance of the resonator, said through hole extending through the center line of said dielectric substance;
• an outer conductive member provided around a periphery of said dielectric substance;
• and
• an inner conductive member provided over said groove and said through hole,
• wherein said dielectric substance has a preselected length along the center line thereof, said through hole having a given length shorter than the preselected length of said dielectric substance, and
• said outer conductive member is isolated from said inner conductive member at the first end portion having said groove formed therein.

A dielectric coaxial resonator comprising:

• a dielectric substance having a preselected length along the center line thereof, said dielectric substance being substantially square in cross section and having first and second end portions opposite each other and separated by the preselected length;
• a first groove formed in the first end portion of said dielectric substance so as to be exposed to the outside, said first groove extending around the center line of said dielectric substance and being substantially square in shape;
• a second groove formed in the second end portion of said dielectric substance so as to be exposed to the outside, said second groove extending around the center line of said dielectric substance and being substantially square in shape;
• a through hole, formed in said dielectric substance, extending through the center line of said dielectric substance, said through hole having a given length shorter than the preselected length of said dielectric substance;
• an outer conductive member provided around a periphery of said dielectric substance;
• and
• an inner conductive member provided over said first and second grooves and said through hole.

A dielectric coaxial resonator comprising:

• a dielectric substance having a preselected length along the center line thereof and first and second end portions opposite each other and separated by the preselected length;
• a groove formed in the first end portion of said dielectric substance so as to be exposed to the outside, said groove being defined around the center line of said dielectric substance by a radially outward wall and a radially inward wall both extending at given angles to the center line of said dielectric substance so as to form tapered surfaces, respectively;
• a through hole, formed in said dielectric substance, extending through the center line of said dielectric substance, said through hole having a given length shorter than the preselected length of said dielectric substance;
• an outer conductive member provided around a periphery of said dielectric substance;
• and
• an inner conductive member provided over said groove and said through hole.

A dielectric coaxial resonator comprising:

• a dielectric substance being substantially square in cross section and having a preselected length along the center line thereof and having first and second end portions opposite each other and being separated by the preselected length;
• a through hole, formed in said dielectric substance, extending through the center line of said dielectric substance, said through hole having a given length shorter than the preselected length of said dielectric substance;
• a substantially square groove formed in the fist end portion of said dielectric substance so as to be exposed to the outside, said groove being defined around the center line of said dielectric substance by a radially outward wall and a radially inward wall, the radially outward wall extending parallel to the center line of said dielectric substance, the radially inward wall extending at a given angle to the center line as to define a frustum of pyramid at a portion of said dielectric substance around an end portion of said through hole;
• an outer conductive member provided around a periphery of said dielectric substance;
• and
• an inner conductive member provided over said groove and said through hole.