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Liquid Metal-Based Frequency and Pattern Reconfigurable Yagi Antenna for Pressure Sensing.

Xiaofeng Yang¹, Xiang Ma², Jiayi Yang³

¹School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710061, China.

Sensors (Basel, Switzerland)

|March 17, 2025

Summary

This summary is machine-generated.

This study presents a reconfigurable Yagi antenna using liquid metal switches for pressure sensing. The antenna

Keywords:

Yagi antenna frequency- and pattern-reconfigurable liquid metal switch stress sensing

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Area of Science:

Electromagnetics and Antenna Design
Sensor Technology
Materials Science

Background:

Reconfigurable antennas are crucial for adaptive wireless systems.
Liquid metal (LM) technology offers unique solutions for tunable electronic components.
Existing pressure sensors may lack wireless or reconfigurable capabilities.

Purpose of the Study:

To propose and demonstrate a novel frequency- and pattern-reconfigurable Yagi antenna.
To utilize liquid metal (LM) switches for pressure-induced reconfiguration.
To explore the application of this antenna in wireless pressure sensing and health monitoring.

Main Methods:

Design of a Yagi antenna incorporating four flexible liquid metal (LM) switches.
Investigation of the antenna's response to external pressure, affecting LM switch states.
Analysis of frequency tuning and radiation pattern reconfiguration based on switch activation.
Fabrication and experimental validation of the proposed antenna design.

Main Results:

The antenna demonstrated frequency tunability from 2.28 GHz to 2.5 GHz.
Radiation patterns were reconfigured between bidirectional end-shot and end-fired modes.
A maximum gain of 6 dBi was achieved.
Experimental results closely matched simulation predictions.

Conclusions:

The proposed LM-based reconfigurable Yagi antenna effectively senses pressure.
The antenna's frequency and radiation pattern can be dynamically altered by external pressure.
This technology holds promise for advanced wireless pressure-sensing and health-monitoring applications.