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Bioinspired Double-Broadband Switchable Microwave Absorbing Grid Structures with Inflatable Kresling Origami
Zhong Zhang1, Hongshuai Lei1, Shengyu Duan1
1Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 30, 2023
Summary
Researchers developed a novel tunable radar stealth structure using inflatable Kresling origami. This switchable microwave absorbing grid offers enhanced broadband performance for military applications.
Area of Science:
- Materials Science
- Electromagnetics
- Mechanical Engineering
Background:
- Tunable radar stealth structures are crucial for advanced military equipment.
- Previous origami-based structures lacked desired broadband microwave absorption.
- Enhancing design space and performance of stealth technology is an ongoing challenge.
Purpose of the Study:
- To develop a novel double-broadband switchable microwave absorbing grid structure.
- To achieve enhanced and tunable electromagnetic performance for radar stealth applications.
- To explore the use of inflatable Kresling origami for adjustable stealth properties.
Main Methods:
- Utilized inflatable Kresling origami structures as actuators for a novel grid design.
- Derived geometric constraints to impart a bistable feature, switchable via internal pressure.
- Employed particle swarm optimization for ultra-broadband microwave absorbing structure optimization.
Main Results:
- Developed a double-broadband switchable microwave absorbing grid structure.
- Achieved superior electromagnetic performance through mode switching activating different absorbing components.
- Demonstrated a continuously adjusting effect via a digital adjusting strategy.
- Confirmed superior robustness and minimal interaction between adjacent grid units.
Conclusions:
- The novel Kresling origami-based structure provides tunable, ultra-broadband microwave absorption.
- The design offers a feasible paradigm for developing other tunable microwave absorbers.
- This work enhances radar stealth capabilities through innovative material and structural design.
