Arrangement and method relating to coupling of signals to/from microwave devices
First Claim
1. An arrangement for coupling electromagnetic waves into and/or out of a microwave device comprising at least one dielectric resonator including a non-linear dielectric substrate with a high dielectric constant, and a coupling loop, wherein the dimensions of the resonator and the coupling loop are related to the resonant frequency of the resonator, the coupling loop having such a geometry and being arranged in relation to the resonator such that the magnetic field lines provided around the coupling loop match an internal field distribution of at least one mode of the resonator so that only said at least one mode is excited in the resonator, and coupling being provided only for said at least one mode, the coupling loop having a length nearly equal to, or larger than, dimensions of the resonator, and wherein one end of the coupling loop is connected to one of the resonator plates, DC-biasing being applicable through the coupling loop, thus providing for electrical tuning of the resonator.
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Abstract
An arrangement for coupling electro magnetic waves, particularly microwaves, into and/or out of a device which includes a dielectric resonator having a non-linear dielectric substrate with a high dielectric constant and a coupling loop. The dimensions of the resonator and the coupling loop are related to the resonant frequency of the resonator. The coupling loop is so arranged in relation to the resonator that the magnetic field lines around the coupling loop match the internal film distribution of at least one mode, which has been selected to be excited, so that only that mode is excited. Coupling is provided only for this mode. The length of the coupling loop is comparable to or larger that the dimensions of the resonator.
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Citations
26 Claims
- 1. An arrangement for coupling electromagnetic waves into and/or out of a microwave device comprising at least one dielectric resonator including a non-linear dielectric substrate with a high dielectric constant, and a coupling loop, wherein the dimensions of the resonator and the coupling loop are related to the resonant frequency of the resonator, the coupling loop having such a geometry and being arranged in relation to the resonator such that the magnetic field lines provided around the coupling loop match an internal field distribution of at least one mode of the resonator so that only said at least one mode is excited in the resonator, and coupling being provided only for said at least one mode, the coupling loop having a length nearly equal to, or larger than, dimensions of the resonator, and wherein one end of the coupling loop is connected to one of the resonator plates, DC-biasing being applicable through the coupling loop, thus providing for electrical tuning of the resonator.
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26. A method of coupling microwave signals into/out of a microwave device comprising at least one dielectric resonator with a nonlinear dielectric substrate having a high dielectric constant, comprising the steps of:
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selecting a mode of the resonator which is to be excited, arranging a coupling loop, the coupling loop having a length which is nearly equal to, or larger than, dimensions of the resonator in such a way that the magnetic field lines provided around the coupling loop match an internal field distribution of the mode selected to be excited, and coupling a microwave signal into/out of the resonator, wherein one end of the coupling loop is connected to one plate of the resonator, DC-biasing being applicable through the coupling loop, thus providing for electrical tuning of the resonator.
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Specification