Variable resonator, variable bandwidth filter, and electric circuit device
First Claim
1. A variable resonator, comprising:
- a ring-shaped conductor line provided on a dielectric substrate and having a circumferential length of a wavelength or an integral multiple of the wavelength at a resonance frequency of the variable resonator; and
at least two first circuit switches, whereineach of said at least two first circuit switches has one end electrically connected to said ring-shaped conductor line and an other end electrically connected to a ground conductor formed on the dielectric substrate, and each of said at least two first circuit switches is configured to select interchangeably electrical connection or electrical disconnection between said ground conductor and said ring-shaped conductor line;
positions on said ring-shaped conductor line, each of which is electrically connected to said one end of a corresponding one of said at least two first circuit switches, are different from one another;
only one of said at least two first circuit switches is selected to turn to an on-state; and
a bandwidth at the resonance frequency changes in response to a change of said selection of said only one of said at least two first circuit switches with said resonance frequency being constant.
1 Assignment
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Accused Products
Abstract
A variable resonator includes a ring-shaped conductor line (2) which is provided on a dielectric substrate (5) and has a circumferential length of a wavelength at a resonance frequency or an integral multiple of the wavelength, and at least two circuit switches (31, 32), wherein the circuit switches (31, 32) have one ends (31) electrically connected to the ring-shaped conductor line (2) and the other ends (32) electrically connected to a ground conductor (4) formed on the dielectric substrate (5), electrical connection/disconnection between the ground conductor (4) and ring-shaped conductor line (2) can be switched, and the one ends (31) of the circuit switches (31, 32) are connected to the ring-shaped conductor line (2) on different portions.
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Citations
24 Claims
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1. A variable resonator, comprising:
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a ring-shaped conductor line provided on a dielectric substrate and having a circumferential length of a wavelength or an integral multiple of the wavelength at a resonance frequency of the variable resonator; and at least two first circuit switches, wherein each of said at least two first circuit switches has one end electrically connected to said ring-shaped conductor line and an other end electrically connected to a ground conductor formed on the dielectric substrate, and each of said at least two first circuit switches is configured to select interchangeably electrical connection or electrical disconnection between said ground conductor and said ring-shaped conductor line; positions on said ring-shaped conductor line, each of which is electrically connected to said one end of a corresponding one of said at least two first circuit switches, are different from one another; only one of said at least two first circuit switches is selected to turn to an on-state; and a bandwidth at the resonance frequency changes in response to a change of said selection of said only one of said at least two first circuit switches with said resonance frequency being constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification