TM dual mode dielectric resonator apparatus and methods for adjusting coupling coefficient and resonance frequencies thereof

A dielectric resonator apparatus comprising:

• an electrically conductive case;
• a cross-shaped TM dual mode dielectric resonator provided in said case, said TM dual mode dielectric resonator comprising first and second integral dielectric resonators disposed perpendicularly to each other and defining a crossing portion at an intersection thereof;
• a mode coupler in said TM dual mode dielectric resonator for coupling an operation mode of said first dielectric resonator with an operation mode of said second dielectric resonator;
• at least one first resonance frequency adjustment projection of a dielectric material for adjusting a resonance frequency of the first dielectric resonator, disposed on a portion of the first dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of the first dielectric resonator pass, said at least one first resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the first dielectric resonator upon removal of the at least one first resonance frequency adjustment projection;
• and
• at least one second resonance frequency adjustment projection of a dielectric material for adjusting a resonance frequency of the second dielectric resonator, disposed on a portion of the second dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of the second dielectric resonator pass, said at least one second resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the second dielectric resonator upon removal of the at least one second resonance frequency adjustment projection.

A dielectric resonator apparatus comprising:

• an electrically conductive case;
• a cross shaped TM dual mode dielectric resonator provided in said case, said TM dual mode dielectric resonator comprising first and second integral dielectric resonators disposed perpendicular to each other and defining a crossing portion at an intersection thereof;
• a mode coupler in said TM dual mode dielectric resonator for coupling an operation mode of said first dielectric resonator with an operation mode of said second dielectric resonator;
• at least one first projection of a dielectric material for adjusting a coupling coefficient between the first and second dielectric resonators disposed on a portion of the crossing portion of the first and second dielectric resonators, said at least one first projection representing a defined adjustment amount to the coupling coefficient upon removal of the at least one first projection;
• at least one first resonance frequency adjustment projection of a dielectric material for adjusting a resonance frequency of the first dielectric resonator, disposed on a portion of the first dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of the first dielectric resonator pass, said at least one first resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the first dielectric resonator upon removal of the at least one first resonance frequency adjustment projection;
• and
• at least one second resonance frequency adjustment projection of a dielectric material for adjusting a resonance frequency of the second dielectric resonator, disposed on a portion of the second dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of said second dielectric resonator pass, said at least one second resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the second dielectric resonator upon removal of the at least one second resonance frequency adjustment projection.

A method for adjusting a coupling coefficient between first and second dielectric resonators of a cross-shaped TM dual mode dielectric resonator of a dielectric resonator apparatus, said cross-shaped TM dual mode dielectric resonator provided in an electrically conductive case, said TM dual mode dielectric resonator comprising the first and second dielectric resonators integrally formed perpendicular to each other and defining a crossing portion at an intersection thereof, the method comprising:

• providing a mode coupler coupling an operation mode of the first dielectric resonator with an operation mode of the second dielectric resonator;
• providing at least one first projection of a dielectric material for adjusting a coupling coefficient between the first and second dielectric resonators on a portion of the crossing portion of the first and second dielectric resonators, the at least one first projection representing a defined adjustment amount to the coupling coefficient upon removal of the at least one first projection;
• and further comprising:
• removing said at least one first projection to adjust the coupling coefficient between the first and second dielectric resonators.

A method for adjusting resonance frequencies of first and second dielectric resonators of a cross-shaped TM dual mode dielectric resonator of a dielectric resonator apparatus, said cross-shaped TM dual mode dielectric resonator provided in an electrically conductive case, said TM dual mode dielectric resonator comprising the first and second dielectric resonators integrally formed perpendicular to each other and defining a crossing portion at an intersection thereof, the method comprising:

• providing a mode coupler for coupling an operation mode of the first dielectric resonator with an operation mode of the second dielectric resonator;
• providing at least one first resonance frequency adjustment projection of a dielectric material for adjusting the resonance frequency of the first dielectric resonator on a portion of the first dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of the first dielectric resonator pass, said first at least one resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the first dielectric resonator upon removal of the at least one first resonance frequency adjustment projection;
• and
• providing at least one second resonance frequency adjustment projection of a dielectric material for adjusting a resonance frequency of the second dielectric resonator on a portion of the second dielectric resonator other than the crossing portion of the first and second dielectric resonators, where electric lines of force of the second dielectric resonator pass, said at least one second resonance frequency adjustment projection representing a defined adjustment amount to the resonance frequency of the second dielectric resonator upon removal of the second at least one resonance frequency adjustment projection;
• removing said at least one first resonance frequency adjustment projection, thereby adjusting the resonance frequency of the first dielectric resonator;
• and
• removing said at least one second resonance frequency adjustment projection, thereby adjusting the resonance frequency of the second dielectric resonator.

A dielectric resonator apparatus comprising:

• an electrically conductive case;
• a cross-shaped TM dual mode dielectric resonator provided in said case, said TM dual mode dielectric resonator comprising first and second integral dielectric resonators disposed perpendicular to each other and defining a crossing portion at an intersection thereof and further defining a planar surface common to said first and second integral dielectric resonators;
• a mode coupler in said TM dual mode dielectric resonator for coupling an operation mode of said first dielectric resonator with an operation mode of said second dielectric resonator;
• and
• at least one first projection of a dielectric material for adjusting a coupling coefficient between the first and second dielectric resonators extending from the planar surface common to the first and second dielectric resonators, the coupling coefficient being adjusted by removing, at least in part, said at least one first projection, said at least one first projection representing a defined adjustment amount to the coupling coefficient.