Lumped-mode resonator

Claim 2

Resonator apparatus comprising: a tubularly shaped lumped-mode resonator having an inductance and an axially extending gap being defined by a first wall and second wall of said lumped-mode resonator, the gap and the inductance determine a resonate frequency of said lumped-mode resonator: a first conductor being connected tangentially to an outside wall of said lumped-mode resonator, said first conductor having a first end being disposed in a planar relation to said first wall of said lumped-mode resonator defining the gap; a second conductor being connected tangentially to said lumped-mode resonator, said second conductor having a first end disposed in a planar relation to said first end of said second wall of said lump-mode resonator defining the gap, said first end of said second conductor being further disposed opposite and juxtaposed to said first end of said first conductor; a dielectric material being connected to said first and second conductors opposite said lumped-mode resonator; and a third conductor being connected to said dielectric material opposite said first and second conductors.

Claim 3

The apparatus of claim 1 wherein said dielectric material comprises a capacitance whereby changes in temperature cause said capacitance to vary.

Claim 4

The apparatus of claim 2 further comprising a shield surrounding said lumped-mode resonator, said first, second and third conductors, and said dielectric material.

Claim 5

The apparatus of claim 3 further comprising a coupling loop adjustably coupled to an extending through said shielding.

Claim 6

Resonator apparatus comprising: a tubularly shaped lumped-mode resonator having a resonate frequency, an axially disposed gap and an inductance, the gap being defined by a first wall and a second wall of said lumped-mode resonator, said inductance of said lumped-mode resonator varying with variations in temperature and said resonator frequency varying with variations in said inductance; a first conductor being tangentially connected to an outside wall of said lumped-mode resonator, said first conductor having a first end being disposed in a planar relation to said first wall defining the gap of said lump-mode resonator; a second conductor being tangentially connected to said outside wall of said lumped-mode resonator, said second conductor having a first end disposed in a planar relation to said second wall defining the gap of said lumped-mode resonator, said first end of said second conductor being further disposed opposite and juxtaposed to said first end of said first conductor; a dielectric material being connected to said first and second conductors opposite said lumped-mode resonator, said dielectric material defining a capacitance, said capacitance varying with changes in temperature, said changes in capacitance of said dielectric material being selected to offset changes in said inductance of said lumped-mode resonator thereby maintaining a substantially constant resonate frequency; and a third conductor being connected to said dielectric material opposite said first and second conductors.

Claim 7

Resonator apparatus comprising: a tubularly shaped lumped-mode resonator having a resonate frequency, an axially disposed gap and an inductance, the gap being defined by a first wall and a second wall of said lumped-mode resonator, said inductance of said lumped-mode resonator varying with variations in temperature and said resonator frequency varying with variations in said inductance; a first conductor being tangentially connected to an outside wall of said lumped-mode resonator, said first conductor having a first end being disposed in a planar relation to said first wall defining the gap of said lump-mode resonator; a second conductor being tangentially connected to said outside wall of said lumped-mode resonator, said second conductor having a first end disposed in a planar relation to said second wall defining the gap of said lumped-mode resonator, said first end of said second conductor being further disposed opposite and juxtaposed to said first end of said first conductor; a dielectric material being connected to said first and second conductors opposite said lumped-mode resonator, said dielectric material defining a capacitance, said capacitance varying with changes in temperature, said changes in capacitance of said dielectric material being selected to offset changes in said inductance of said lumped-mode resonator thereby maintaining a substantially constant resonate frequency; and a third conductor being connected to said dielectric material opposite said first and second conductors.

Claim 8

The apparatus of claim 5 further comprising a shield surrounding said lumped-mode resonator, said first and second conductors, said dielectric material and said third conductor.

Claim 9

The apparatus of claim 6 further comprising a coupling loop adjustably coupled to and extending through said shield.

Claim 10

Resonator apparatus comprising: a tubularly shaped lumped-mode resonator having first and second axially extending walls defining an axially extending gap in a side thereof, the gap defining the capacitance of said lumped-mode resonator; a printed circuit capacitor including a pair of juxtaposed metal plates having a dielectric therebetween, one of said pair of plates having a first wall and a second wall defining a groove therein; and said printed circuit capacitor being fixedly attached to said lumped-mode resonator with first and second walls of said lumped-mode resonator being disposed in a planar relation to said first and second walls respectively of said printed circuit capacitor, the groove of said printed circuit capacitor being positioned in overlying relationship to the gap in said resonator for reducing movement of said resonator gap.

Claim 11

Resonator apparatus comprising: a tubularly shaped lumped-mode resonator having first and second axially extending walls defining an axially extending gap in a side thereof, the gap defining the capacitance of said lumped-mode resonator; a printed circuit capacitor including a pair of juxtaposed metal plates having a dielectric therebetween, one of said pair of plates having a first wall and a second wall defining a groove therein; and said printed circuit capacitor being fixedly attached to said lumped-mode resonator with first and second walls of said lumped-mode resonator being disposed in a planar relation to said first and second walls respectively of said printed circuit capacitor, the groove of said printed circuit capacitor being positioned in overlying relationship to the gap in said resonator for reducing movement of said resonator gap.

Claim 12

The resonator apparatus of claim 8 wherein said dielectric of said printed circuit capacitor is formed of material that alters the capacitance of said printed capacitor with temperature changes to substantially offset changes in said lumped-mode resonator with the temperature changes.