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Strain-Insensitive Hierarchically Structured Stretchable Microstrip Antennas for Robust Wireless Communication.

Jia Zhu¹, Senhao Zhang^2,3,4, Ning Yi⁵

¹Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA, 16802, USA. jmz5364@psu.edu.

Nano-Micro Letters

|June 17, 2021

Summary

This summary is machine-generated.

This study introduces a novel stretchable antenna for flexible electronics that maintains stable performance during stretching, enabling robust wireless communication and energy harvesting. This design also allows for tunable frequencies for sensing applications.

Keywords:

RF energy harvesting Strain-insensitive resonance frequency Stretchable microstrip antennas Wearable and bio-integrated electronics Wireless communication

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Area of Science:

Materials Science
Electrical Engineering
Electromagnetics

Background:

Stretchable antennas are crucial for flexible electronics but suffer from frequency detuning during mechanical deformation.
This limitation restricts their use in wireless transmission and energy harvesting, primarily confining them to wireless sensing applications.

Purpose of the Study:

To develop a hierarchically structured stretchable microstrip antenna with enhanced stretchability and tunable resonance frequency.
To enable robust wireless communication, radio frequency (RF) energy harvesting, and versatile wireless sensing capabilities in flexible electronic devices.

Main Methods:

Design of a stretchable microstrip antenna featuring meshed patterns arranged in an arched shape.
Utilizing coupled mechanical-electromagnetic simulations to engineer antenna structure and predict performance under deformation.
Experimental validation of antenna performance, including wireless communication efficiency and resonance frequency stability during stretching.

Main Results:

The proposed antenna demonstrated tunable resonance frequency upon deformation, offering versatility for different applications.
Achieved robust on-body wireless communication and RF energy harvesting due to almost unchanged resonance frequency during 25% stretching.
Efficient wireless communication was maintained over 100m with a receiving power higher than -100 dBm.

Conclusions:

The developed stretchable microstrip antenna overcomes the frequency detuning issue, enabling reliable wireless transmission and energy harvesting in flexible electronics.
The design provides a versatile platform for both stable wireless communication and deformation-based sensing.
The combination of structural engineering and simulation tools offers a powerful approach for designing advanced stretchable antennas and wireless devices.