Design and Demonstration of a Microelectromechanical System Single-Ring Resonator with Inner Ring-Shaped Spring...

Area of Science:

• Mechanical Engineering
• Electrical Engineering
• Materials Science

Background:

• Micro-electromechanical systems (MEMS) resonators are crucial for various electronic applications.
• Understanding the dynamic behavior and frequency tuning of resonators is essential for device optimization.
• Previous designs often lack simplicity or efficient tunability.

Purpose of the Study:

• To present a novel, simple single-ring resonator design.
• To investigate its dynamic behavior, including mode shapes, resonance frequencies, and frequency shifts.
• To explore the influence of applied DC and AC bias voltages on resonator performance and frequency splitting.

Main Methods:

• Numerical simulations and analytical calculations were employed to determine mode shapes and frequencies.
• Resonance frequencies, pull-in voltage, and harmonic response were analyzed for different silicon orientations.
• Experimental verification was performed on fabricated prototypes using a silicon-on-insulator (SOI) wafer technique.

Main Results:

• The minimum split frequency was observed in the n = 3 mode of vibration.
• Applied DC bias voltage increased the split frequency in the n = 3 mode uniformly across silicon types.
• AC voltage phase influenced the number of resonance frequencies in the n = 2 mode (two frequencies for 180-degree phase, one for same phase).

Conclusions:

• The novel single-ring resonator design exhibits predictable and tunable dynamic behavior.
• The applied bias voltage offers a method for controlling resonance frequencies, particularly the split frequency.
• Experimental validation confirms the resonator's performance and the effectiveness of the design for frequency tuning applications.