Liquid Metal-Based Flexible Band-Stop Frequency Selective Surface

Mitra, Arkadeep; Xu, Kevin; Babu, Sachin; Choi, Jun H.; Lee, Jeong

doi:10.1109/mems51782.2021.9375361

Cited by 3 publications

(7 citation statements)

References 7 publications

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“…In recent years there has been growing interest in using LMs as tuning components for radio frequency/microwave applications such as filters [9][10][11][12], resonators [13] and frequency selective surfaces [14,15]. Compared with solid metal, LM not only has high conductivity but also has the natural advantages of good fluidity, controllable deformation and portability.…”

Section: Microwave Devicesmentioning

confidence: 99%

“…Ref. [14] proposed a physical flexible (bendable, foldable) gallium-based LM band stop frequency selective surface for PDMS package. LM was embedded in PDMS microfluidic channels replicated from deep-etched silicon molds.…”

Section: Microwave Devicesmentioning

confidence: 99%

“…The prepared FSS was characterized in a waveguide environment, and the simulated and measured S parameter values with stop FSS response were in good agreement. A flexible, adjustable, and tunable second-order bandpass FSS was proposed in [15], which used an elastomer microfluidic channel similar to [14] to encapsulate gallium-based LM. The method changed the position of the LM and adjusted the capacitor linearly, to achieve high-precision real-time continuous tuning.…”

Section: Microwave Devicesmentioning

confidence: 99%

“…There is growing interest in using LMs as tuning components for radio frequency/microwave applications, such as filters [9][10][11][12], resonators [13] and frequency selective surfaces (FSS) [14,15]. Strain sensors are essential to study the changes of the human body in the medical field.…”

Section: Introductionmentioning

confidence: 99%

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Liquid Metal-Based Devices: Material Properties, Fabrication and Functionalities

et al. 2021

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This paper reviews the material properties, fabrication and functionalities of liquid metal-based devices. In modern wireless communication technology, adaptability and versatility have become attractive features of any communication device. Compared with traditional conductors such as copper, the flow characteristics and lack of elastic limit of conductive fluids make them ideal alternatives for applications such as flexible circuits, soft electronic devices, wearable stretch sensors, and reconfigurable antennas. These fluid properties also allow for innovative manufacturing techniques such as 3-D printing, injecting or spraying conductive fluids on rigid/flexible substrates. Compared with traditional high-frequency switching methods, liquid metal (LM) can easily use micropumps or an electrochemically controlled capillary method to achieve reconfigurability of the device. The movement of LM over a large physical dimension enhances the reconfigurable state of the antenna, without depending on nonlinear materials or mechanisms. When LM is applied to wearable devices and sensors such as electronic skins (e-skins) and strain sensors, it consistently exhibits mechanical fatigue resistance and can maintain good electrical stability under a certain degree of stretching. When LM is used in microwave devices and paired with elastic linings such as polydimethylsiloxane (PDMS), the shape and size of the devices can be changed according to actual needs to meet the requirements of flexibility and a multistate frequency band. In this work, we discuss the material properties, fabrication and functionalities of LM.

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Section: Microwave Devicesmentioning

confidence: 99%

Section: Microwave Devicesmentioning

confidence: 99%

Section: Microwave Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Liquid Metal-Based Devices: Material Properties, Fabrication and Functionalities

et al. 2021

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“…Metasurface-based frequency selective surfaces are spatial filters that exist in 1D or 2D as band-pass, band-stop, low-pass, and high-pass [6]. A metasurface comprises of artificially engineered man-made structures that transmit, reflect, or absorb electromagnetic (EM) waves of specific frequency bands [6].…”

Section: Introductionmentioning

confidence: 99%

Physically Flexible Multi-Layer Liquid Metal-Based Band-Pass Metasurface

Mitra,

Xu,

Choi

et al. 2022

2022 Solid-State, Actuators, and Microsystems Workshop Technical Digest

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A liquid metal-based physically flexible (stretchable, bendable, twistable, and foldable) thickness customized multi-layer second-order band-pass metasurface in the X-band (7 ~ 11.2 GHz) has been designed, fabricated, and characterized. The multi-layer metasurface consists of a liquid metal-based inverter layer in the middle to enable the metasurface extremely thin (total thickness of 4.81 mm, < λ0/7.5). Liquid metal has been sprayed into the PDMS replicated patterns by using an airbrush operating at 36 psi. Sparameters of the metasurface sample measured using a WR-90 waveguide setup showed good agreement with simulated results.

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Fabrication of a Multilayer X-Band Band-Pass Metasurface Using Liquid Metal

Mitra

Payne

et al. 2022

IEEE Electron Device Lett.

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Liquid Metal-Based Flexible Band-Stop Frequency Selective Surface

Cited by 3 publications

References 7 publications

Liquid Metal-Based Devices: Material Properties, Fabrication and Functionalities

Liquid Metal-Based Devices: Material Properties, Fabrication and Functionalities

Physically Flexible Multi-Layer Liquid Metal-Based Band-Pass Metasurface

Fabrication of a Multilayer X-Band Band-Pass Metasurface Using Liquid Metal

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