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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

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Published on: January 29, 2013

A Multilayered GaAs IPD Resonator with Five Airbridges for Sensor System Application.

Xiao-Yu Zhang¹, Zhi-Ji Wang², Jian Chen²

¹Department of Electronic Convergence Engineering, Kwangwoon University, Seoul 139-701, Republic of Korea.

|March 28, 2024

Summary

This study presents a compact gallium arsenide microwave resonator using integrated passive device technology. The novel design demonstrates high sensitivity for real-time sensing applications.

Keywords:

airbridges gallium arsenide integrated passive device microwave resonator

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Area of Science:

Electrical Engineering
Materials Science
Microwave Engineering

Background:

Integrated Passive Device (IPD) technology offers a robust, cost-effective solution for miniaturized electronic systems.
Microwave resonators are crucial components in various communication and sensing systems.
Gallium arsenide (GaAs) is a semiconductor material with excellent high-frequency properties.

Purpose of the Study:

To design and fabricate a novel microwave resonator using GaAs and IPD technology.
To investigate the performance characteristics of the resonator, including return loss, insertion loss, and quality factor.
To explore the potential of the resonator for high-sensitivity, real-time sensing applications.

Main Methods:

Fabrication of a three-layered interlaced spiral resonator with airbridges and interdigital structures using IPD technology.
Electromagnetic simulation to analyze E- and H-field distributions and the impact of airbridges.
Experimental characterization of the resonator's S-parameters, return loss, and insertion loss at 1.99 GHz.
Sensing experiments using glucose solutions of varying concentrations to evaluate sensitivity and response time.

Main Results:

The fabricated resonator operated at 1.99 GHz with a return loss of 39 dB and insertion loss of 0.07 dB.
Achieved a quality factor of 1.15, demonstrating efficient energy storage.
Demonstrated a minimum detectable glucose concentration of 0.2 mg/mL with a sensitivity of 14.58 MHz/mg·mL⁻¹.
Exhibited a linear response and short response time in sensing applications.

Conclusions:

The proposed GaAs microwave resonator fabricated using IPD technology shows excellent performance for integrated systems.
The device exhibits high sensitivity and fast response, making it suitable for real-time biosensing.
This work highlights the potential of compact, high-performance resonators in advanced sensing and communication systems.