Bandpass filter having magnetically coupled resonators
First Claim
Patent Images
1. A bandpass filter comprising:
- a plurality of resonators; and
a magnetic induction coupling being established between adjacent pairs of said resonators, wherein each of said resonators includesan LC series circuit, andfirst capacitance element connected in parallel to said LC series circuit,said LC series current including a second capacitance element and two inductance elements, said second capacitance elements connected in series between said two inductance elements, andsaid magnetic induction coupling being provided by a coupling between at least one of said inductance elements of each adjacent pair of said resonators.
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Abstract
A bandpass filter comprising a plurality of resonators coupled by a magnetic induction coupling. Each of the resonators includes an equivalent circuit having an LC series circuit and a capacitance element connected in parallel, the LC series circuit including one capacitance element and two inductance elements connected in series to both sides of the one capacitance element. This construction realizes the magnetic induction coupling by utilizing the inductance elements constituting the resonators, without necessitating a separate coupling means such as a capacitance element.
26 Citations
15 Claims
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1. A bandpass filter comprising:
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a plurality of resonators; and a magnetic induction coupling being established between adjacent pairs of said resonators, wherein each of said resonators includes an LC series circuit, and first capacitance element connected in parallel to said LC series circuit, said LC series current including a second capacitance element and two inductance elements, said second capacitance elements connected in series between said two inductance elements, and said magnetic induction coupling being provided by a coupling between at least one of said inductance elements of each adjacent pair of said resonators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A bandpass filter comprising:
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a plurality of resonators; and a magnetic induction coupling being established between adjacent pairs of said resonators, wherein each of said resonators includes a substrate, two coil layers formed on one of principal surfaces of the substrate, and two capacitors each interconnecting opposed ends of said two coil layers, said magnetic induction coupling being provided by a coupling between at least one of said coil layers of adjacent pairs of said resonators. - View Dependent Claims (12, 13)
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14. A bandpass filter comprising:
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a plurality of resonators formed on a dielectric substrate means; and a magnetic induction coupling being established between adjacent pairs of said resonators, wherein each of said resonators includes two pairs of capacitor electrode layers formed on a front face and a back face of said dielectric substrate means and opposed to each other across said dielectric substrate means, a first coil layer interconnecting two of said capacity electrode layers formed on the front face of said dielectric substrate means, and a second coil layer interconnecting two of said capacitor electrode layers formed on the back face of said dielectric substrate means, said magnetic induction coupling being provided by a coupling between said coil layers of an adjacent pair of said resonators. - View Dependent Claims (15)
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Specification