Frequency tunable oscillator
First Claim
1. A frequency tunable oscillator comprising a negative resistance element and a resonator together forming a feedback circuit, and further comprising, in at least a part of the feedback circuit, a distributed constant material so configured as to have a distributed constant such that an electrical length in the resonator is modulated and a modification means for externally modifying the distributed constant material, wherein the oscillation frequency is allowed to vary through the external modification by the modification means.
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Accused Products
Abstract
There is provided a frequency tunable oscillator that has less degradation of oscillation characteristics due to a parasitic reactance component or the like without mounting therein a lumped constant element such as a variable capacitance element. The frequency tunable oscillator includes a negative resistance element and a resonator which together form a feedback circuit. The frequency tunable oscillator further includes in at least a part of the feedback circuit, a distributed constant material so configured as to have a distributed constant such that an electrical length in the resonator is modulated, and a modification means for externally modifying the distributed constant material, wherein the oscillation frequency can be varied through the external modification by the modification means.
37 Citations
8 Claims
- 1. A frequency tunable oscillator comprising a negative resistance element and a resonator together forming a feedback circuit, and further comprising, in at least a part of the feedback circuit, a distributed constant material so configured as to have a distributed constant such that an electrical length in the resonator is modulated and a modification means for externally modifying the distributed constant material, wherein the oscillation frequency is allowed to vary through the external modification by the modification means.
Specification