Zeroeth-order resonator
First Claim
1. A resonator apparatus, comprising:
- a composite high frequency right/left-handed (CRLH) transmission line (TL);
means for combining unit cells having a desired equivalent shunt inductance and shunt capacitance within said CRLH-TL; and
at least one input and output port on said resonator for coupling high frequency signals into and out of said resonator;
wherein said TL is configured for resonating at the zeroeth-order characterized by an infinite-wavelength wave in the CRLH-TL and has a resonant frequency which is independent of the physical size characteristics of the resonator.
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Abstract
A high frequency resonator circuit and method of fabrication is described which has a resonant frequency independent of physical resonator dimensions. The resonator operates in a zeroeth-order mode on a composite right/left-handed (CRLH) transmission line (TL). The LH wave properties of the CRLH-TL contributing anti-parallel phase and group velocities. In one variation, the unit cells are formed from microstrip techniques, preferably creating alternating interdigitated capacitors and stub inductors. The resonant wavelength of the resonator is dependent on the electrical characteristics of the unit cells and not the physical size of the resonator in relation to the desired resonant wavelength. The resonator is created with at least 1.5 unit cells and the Q of the resonator is substantially independent of the number of unit cells utilized. The resonator circuit is particularly well suited for reducing resonator size, and allows resonators of various wavelengths to be fabricated within a fixed board area.
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Citations
20 Claims
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1. A resonator apparatus, comprising:
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a composite high frequency right/left-handed (CRLH) transmission line (TL); means for combining unit cells having a desired equivalent shunt inductance and shunt capacitance within said CRLH-TL; and at least one input and output port on said resonator for coupling high frequency signals into and out of said resonator; wherein said TL is configured for resonating at the zeroeth-order characterized by an infinite-wavelength wave in the CRLH-TL and has a resonant frequency which is independent of the physical size characteristics of the resonator. - View Dependent Claims (2, 3, 4, 5)
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6. A resonator apparatus, comprising:
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a composite high frequency right/left-handed (CRLH) transmission line (TL); wherein said CRLH-TL is configured for providing anti-parallel phase and group velocities; at least 1.5 unit cells having inductors and capacitors formed as microstrips providing a desired equivalent shunt inductance and shunt capacitance within said CRLH-TL; at least one input and output port on said resonator for coupling high frequency signals into and out of said resonator; and wherein said TL is configured for resonating at the zeroeth-order characterized by an infinite-wavelength wave in the CRLH-TL and has a resonant frequency which is independent of the physical size characteristics of the resonator. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of implementing high frequency resonators, comprising:
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forming an inductor-capacitor (LC) unit cell configured to include left-hand wave operation for contributing anti-parallel phase and group velocities; coupling at least 1.5 unit cells into a composite right/left-handed (CRLH) transmission line (TL) configured for resonating at the zeroeth-order characterized by an infinite-wavelength wave in the CRLH-TL with a resonant frequency which is independent of the physical size characteristics of the resonator; and coupling at least one input port and output port to said CRLH-TL. - View Dependent Claims (19, 20)
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Specification