Transparent and Flexible Patch Antenna Using MMF for Conformal WiFi-6E Applications

Nguyen, Tien Dat; Lee, Yongkeun; Jung, Chang Won

doi:10.26866/jees.2023.4.r.172

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…The realization of a transparent MMA involves the integration of a transparent substrate, such as glass or polyethylene terephthalate (PET), with a patterned transparent conductor. Among the various candidates for transparent conductors [29,30,34], indium tin oxide (ITO) and silver (Ag) nanowire composites have been validated. In particular, ITO is favored for its optimal balance of transparency and conductivity [19,27,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Bark,

Kim,

Lee

et al. 2024

Fractal Fract

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In this paper, we propose an optically transparent dual-band metamaterial absorber (MMA) that uses Ag nanowire screen-printed fractal structures. The proposed MMA exhibits near-perfect absorption in the C- and K-bands. This dual-band absorption property is achieved through two inductive–capacitive (L-C) resonances located at 6.45 and 21.14 GHz, which are generated by the second-order fractal structures. We analyzed the microwave absorbing mechanisms through the distributions of the surface current and electromagnetic field on the top and bottom layers. The MMA demonstrates an optical transmittance of 63.1% at a wavelength of 550 nm. This high optical transmittance is attained by screen printing transparent Ag nanowire ink onto a transparent PET substrate. Since screen printing is a simple and low-cost fabrication method, the proposed MMA offers the advantages of being low cost while having the properties of optical transparency and effective dual-band absorption. Consequently, it holds great potential for the radar stealth application of C- and K-bands in that it can be attached to the windows of stealth aircraft due to its optical transparency and dual-band near-perfect absorption property.

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Section: Introductionmentioning

confidence: 99%

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Bark,

Kim,

Lee

et al. 2024

Fractal Fract

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show abstract

“…Transparency can be achieved in the following two ways, similar to radar absorption techniques: material selection and structural design. Constructing devices with transparent substances such as polyethylene terephthalate (PET) and polymethyl methacrylate (PMMA) is one such strategy [17][18][19]. Moreover, transparent conductive materials such as indium tin oxide (ITO) and silver nanowires are viable options [20,21].…”

Section: Introductionmentioning

confidence: 99%

Screen-Printed Metamaterial Absorber Using Fractal Metal Mesh for Optical Transparency and Flexibility

Choi,

Lim,

Lim

2024

Fractal Fract

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In stealth applications, there is a growing emphasis on the development of radar-absorbing structures that are efficient, flexible, and optically transparent. This study proposes a screen-printed metamaterial absorber (MMA) on polyethylene terephthalate (PET) substrates using indium tin oxide (ITO) as the grounding layer, which achieves both optical transparency and flexibility. These materials and methods enhance the overall flexibility and transparency of MMA. To address the limited transparency caused by the silver nanoparticle ink for the top pattern, a metal mesh was incorporated to reduce the area ratio of the printed patterns, thereby enhancing transparency. By incrementing the fractal order of the structure, we optimized the operating frequency to target the X-band, which is most commonly used in radar detection. The proposed MMA demonstrates remarkable performance, with a measured absorption of 91.99% at 8.85 GHz and an average optical transmittance of 46.70% across the visible light spectrum (450 to 700 nm), indicating its potential for applications in transparent windows or drone stealth.

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“…To address this issue and meet the growing demand for wireless networks, WiFi 6 GHz (5.925-7.12 GHz) has been developed. References [1][2][3][4][5] introduced a design of a single-port antenna for 6 GHz WiFi; however, there are some limitations in the design of a single-port antenna, especially in complex wireless environments where there are still problems such as multipath effects and interference, which may lead to degradation of the signal quality and reduce the data transmission rate.…”

Section: Introductionmentioning

confidence: 99%

Design of a Dual-Band WiFi Antenna Using the Theory of Characteristic Modes and Nested Chinese Characters

Wang,

Nie

2023

Electronics

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In this paper, a dual-band WiFi antenna and its Multiple Input Multiple Output (MIMO) system application is designed, fabricated, and measured based on the Chinese characters “Men” and “Wei”. The antenna uses a 40 × 40 × 1.6 mm3 FR4 substrate to analyze the combinatorial structure of Chinese characters using the theory of characteristic modes, to optimize the antenna dimensions by analyzing the mode current distribution, and to broaden the antenna bandwidth by etching rectangular slots on the ground. The measured and simulated results show that the four-element MIMO antenna covers 5.68–8.01 GHz, the isolation between the antennas is higher than 20 dB in the working band, the envelope correlation coefficient and the channel capacity losses of the simulation are lower than 0.001 and 0.18 bits/s/HZ, respectively. The efficiency of the antenna is higher than 90%, and it can be used for WiFi communication bands (5.8 GHz and 6 GHz).

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Transparent and Flexible Patch Antenna Using MMF for Conformal WiFi-6E Applications

Cited by 7 publications

References 23 publications

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Optically Transparent Dual-Band Metamaterial Absorber Using Ag Nanowire Screen-Printed Second-Order Cross-Fractal Structures

Screen-Printed Metamaterial Absorber Using Fractal Metal Mesh for Optical Transparency and Flexibility

Design of a Dual-Band WiFi Antenna Using the Theory of Characteristic Modes and Nested Chinese Characters

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