Out-of-Plane Bending Resonator Structure for Stable Resonant Frequency
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Solution Overview
Problem
Resonators with vibration arms in out-of-plane bending mode experience attenuation of vibrations, leading to distorted resonance waveforms and shifts in resonant frequency, which negatively impact resonance characteristics and phase noise.
Innovation Solution
A resonator design featuring vibration arms with fixed and open ends, a base section that bends during out-of-plane vibration, and holding arms connecting the vibration section to a frame, where the holding arms bend in conjunction with the base section, effectively suppressing resonant frequency shifts by dispersing moment and enhancing vibration characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If vibration arms perform out-of-plane bending vibration with large amplitude, then vibration energy is sufficient for resonance operation, but resonant frequency shifts and waveform distortion occur due to vibration attenuation in the base unit
Solution Approach 1:
The holding arm acts as an intermediary element between the vibration section and the base unit. It transmits vibration energy from the base section to the holding unit while isolating the vibration section from direct attenuation by the base unit, thereby maintaining resonance characteristics stability even at large vibration amplitudes
Solution Approach 2:
The resonator is divided into distinct functional sections: the vibration section (with vibration arms), the base section, and the holding unit (with holding arms). This segmentation allows each part to perform its specific function independently, preventing vibration attenuation from affecting the resonance characteristics
2Power
If vibration amplitude is increased to improve signal strength, then resonance operation is enhanced, but resonant frequency shifts occur due to attenuation effects
Solution Approach 1:
The holding arm serves as a mediator that allows high vibration amplitude for strong signal output while preventing the attenuation-induced frequency shifts from affecting the resonant frequency accuracy. It decouples the power transmission function from the frequency stability function
3Strength
If the base unit holds the resonator firmly between substrates, then mechanical support is sufficient, but vibration attenuation distorts resonance waveforms
Solution Approach 1:
The resonator structure is segmented into the vibration section, base section, and holding unit. The holding unit provides mechanical support through the holding arms without causing vibration attenuation, thus maintaining both mechanical strength and resonance waveform stability
Solution Approach 2:
The holding arms act as intermediaries that provide mechanical support from the holding unit to the base section while allowing vibrations to pass through without significant attenuation, preventing waveform distortion
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively suppresses resonant frequency shifts and improves vibration characteristics, reducing phase noise and maintaining resonance stability even at larger vibration amplitudes.
Implementation Method 1
a plurality of vibration arms each having a fixed end and an open or free end, at least two vibration arms of which perform out-of-plane bend with different phases
Implementation Method 2
the rear end of the base sections is configured to bend, when the vibration arms perform the out-of-plane bend, in a direction of the out-of-plane bend
Implementation Method 3
at least one holding arm that is provided between the vibration section and the holding unit... the at least one holding arm bends in the direction of the out-of-plane bend when the base section bends
Data Source
AI summary
A resonator is provided that suppresses a shift in resonant frequency. The resonator includes a vibration member including vibration arms extending therefrom with two or more of the vibration arms performing out-of-plane bend with different phases. Moreover, the resonator includes a base having a front end connected to the vibration arms and a rear end opposing the front end and structured to bend in a direction of the out-of-plane bend when the vibration arms perform the out-of-plane bend. Moreover, a frame surrounds a periphery of the vibration member and one or more holding arms are positioned between the vibration member and the frame. One end of each holding arm is connected to the base and the other end of the holding arm is connected to the frame. The holding arms bend in the direction of the out-of-plane bend when the base bends.