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US 12,548,879 B2Granted
Apparatus and method for coupling electromagnetic energy into a cavity of a resonator which includes one or more loop-gap resonators
AssigneeHoneywell International Inc.
InventorsCharles Rhoads, Chad Fertig
Life of this patent
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Abstract
Techniques are provided for efficiently coupling radio frequency spectrum electromagnetic energy into a central cavity of a resonator also including one or more loop-gap resonator. The electromagnetic energy is first coupled into each loop-gap resonator. A portion of each electromagnetic energy is coupled from each loop-gap resonator into the central cavity.
Claims17
An apparatus for efficiently coupling electromagnetic energy into a central cavity of a primary resonator in an electrically conductive ring, the apparatus comprising:
- the central cavity in the electrically conductive ring;
- one or more satellite cavities in the electrically conductive ring;
- one or more gaps in the electrically conductive ring, wherein each gap commences at a unique satellite cavity and terminates at the central cavity, and wherein each gap, the central cavity, and each satellite cavity are each a void in the electrically conductive ring;
- one or more loop-gap resonators, wherein each loop-gap resonator comprises the unique satellite cavity and a unique gap between the unique satellite cavity and the central cavity;
- wherein each loop-gap resonator is configured to receive radio frequency spectrum electromagnetic energy from a source external to the electrically conductive ring;
- and
- the primary resonator comprising each loop-gap resonator and the central cavity;
- wherein each loop-gap resonator is configured to electromagnetically couple at least a portion of the radio frequency spectrum electromagnetic energy into the central cavity;
- wherein each loop-gap resonator has a first resonance centered around a first resonant frequency;
- wherein the primary resonator has a second resonance centered around a second resonant frequency;
- and
- wherein a difference between the first and the second resonant frequencies is less than or equal to three line widths of a broadest resonance of the first resonance and the second resonance.
9 more elements
A method for efficiently coupling electromagnetic energy into a central cavity of a primary resonator in an electrically conductive ring, the method comprising:
- receiving radio frequency spectrum electromagnetic energy in one or more loop-gap resonators, wherein each loop-gap resonator is configured to receive the radio frequency spectrum electromagnetic energy from a source external to the electrically conductive ring, wherein each loop-gap resonator comprises a unique satellite cavity and a unique gap connecting the unique satellite cavity to the central cavity, wherein each gap, each satellite cavity, and the central cavity are in the electrically conductive ring, and wherein each gap, the central cavity, and each satellite cavity are each void in the electrically conductive ring;
- and
- electromagnetically coupling from the one or more loop-gap resonators at least a portion of the radio frequency spectrum electromagnetic energy into the central cavity, wherein the primary resonator comprises each loop-gap resonator and the central cavity;
- wherein each loop-gap resonator has a first resonance centered around a first resonant frequency;
- wherein the primary resonator has a second resonance centered around a second resonant frequency;
- and
- wherein a difference between the first and the second resonant frequencies is less than or equal to three line widths of a broadest resonance of the first resonance and the second resonance.
4 more elements
An apparatus configured to efficiently couple electromagnetic energy into a central cavity in an electrically conductive ring, the apparatus comprising:
- the electrically conductive ring comprising an electrical conductor, the central cavity in the electrical conductor defined by an inner radius, a plurality of gaps in the electrical conductor, and a plurality of satellite cavities in the electrical conductor, wherein each satellite cavity is disposed about the central cavity, is equally spaced with respect to each adjacent satellite cavity, and is equally spaced with respect to the central cavity, wherein each satellite cavity is connected by a unique gap, wherein each satellite cavity has a satellite cavity radius, wherein each gap, the central cavity, and each satellite cavity are each a void in the electrical conductor;
- at least one loop-gap resonator, wherein each loop-gap resonator comprises a unique satellite cavity and a gap connecting the unique satellite cavity to the central cavity;
- a primary resonator comprising each loop-gap resonator and the central cavity;
- and
- a plurality of a set of at least one shielded transmission line and an electromagnetic coupling element, wherein each shielded transmission line of a set is electromagnetically coupled to a coupling element, wherein each coupling element is configured to electromagnetically couple radio frequency spectrum electromagnetic energy to a unique loop-gap resonator, and wherein each loop-gap resonator is configured to electromagnetically couple at least a portion of the radio frequency spectrum electromagnetic energy into the central cavity;
- wherein each loop-gap resonator has a first resonance centered around a first resonant frequency;
- wherein the primary resonator has a second resonance centered around a second resonant frequency;
- and
- wherein a difference between the first and the second resonant frequencies is less than or equal to three line widths of a broadest resonance of the first resonance and the second resonance.
6 more elements
Dependencies are inferred from the claim text.