Tuner and radiation shield for planar electron paramagnetic resonance microresonators

Area of Science:

• Physics
• Electrical Engineering
• Materials Science

Background:

• Planar microresonators offer high sensitivity for analyzing small samples.
• Lithographic manufacturing allows for versatile resonator design and integration of couplers.
• Tuning elements are needed to optimize coupling and compensate for manufacturing variations.

Purpose of the Study:

• To present a simple design for tuning planar microresonators.
• To enable undercoupled resonators to achieve critical coupling.
• To reduce radiation losses and enhance resonator performance.

Main Methods:

• Development of a novel, simple tuning element design.
• Integration of the tuning element with planar microresonators and microwave feedlines.
• Experimental adjustment of the tuning element to achieve critical coupling.

Main Results:

• The proposed design successfully transitions undercoupled resonators to critical coupling.
• Radiation losses are significantly reduced by the tuning element.
• The quality factor and overall sensitivity of the microresonators are increased.

Conclusions:

• The simple tuning element design effectively enhances planar microresonator performance.
• This method offers a practical solution for optimizing resonator coupling and sensitivity.
• The improved quality factor and sensitivity are beneficial for various sensing applications.