Variable resonator
First Claim
1. A variable resonator, comprising:
- a dielectric substrate;
an input/output line formed on the dielectric substrate;
a first resonator that has one end connected directly to said input/output line and another end directly grounded; and
a second resonator that has one end connected to the point of connection of said one end of said first resonator to said input/output line and another end grounded via a terminal switch,wherein the first and second resonators are configured so that a combined admittance of the first and second resonators seen from the point of connection is zero at both a predetermined first frequency when the terminal switch is ON and a predetermined second frequency different from the first frequency when the terminal switch is OFF.
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Accused Products
Abstract
A variable resonator has a dielectric substrate 2, an input/output line 3 formed on the dielectric substrate 2, a first resonator 4 that has one end connected to the input/output line 3 and the other end grounded, and a second resonator that has one end connected to the input/output line 3 at the point of connection of the one end of the first resonator 4 and the other end grounded via a terminal switch 7. When the terminal switch 7 is turned off, resonance occurs at a frequency at which the sum of the line lengths of the first resonator 4 and the second resonator 6 equals to a quarter of the wavelength. When the terminal switch 7 is turned on, resonance occurs at a frequency at which a half of the sum of the line lengths equals to a quarter of the wavelength.
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Citations
11 Claims
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1. A variable resonator, comprising:
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a dielectric substrate; an input/output line formed on the dielectric substrate; a first resonator that has one end connected directly to said input/output line and another end directly grounded; and a second resonator that has one end connected to the point of connection of said one end of said first resonator to said input/output line and another end grounded via a terminal switch, wherein the first and second resonators are configured so that a combined admittance of the first and second resonators seen from the point of connection is zero at both a predetermined first frequency when the terminal switch is ON and a predetermined second frequency different from the first frequency when the terminal switch is OFF. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification