Efficiency-Improved UWB Transparent Antennas Using ITO/Ag/ITO Multilayer Electrode Films

Kim, Jeong-Wook; Oh, Ju-Ik; Kim, Kwang‐Seok; Yu, Jong‐Won; Jung, K.B.; Cho, Ilnam

doi:10.1109/access.2021.3131868

Cited by 12 publications

(7 citation statements)

References 63 publications

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“…Lower R S can also be obtained for a thicker film, which decreases T. Therefore, metal-oxide transparent conductor films also have the same tradeoff between T and R S as metal-based transparent conductor films. Recently, metal-oxide/metal/metal-oxide transparent conductor films such as ITO/Ag/ITO have been proposed, where the plasmon resonance at the interface between the metal ultrathin film and metal oxides enhances optical transparency, resulting in good compatibility of high T and low R S [10,11].…”

Section: Carbon Reportsmentioning

confidence: 99%

Graphene transparent antennas

et al. 2023

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Transparent antennas have attracted much attention because they can meet the demands of the Internet of Things (IoT) and fifth generation (5G) mobile communication technologies. From this point of view, intensive research and development has been carried out to produce materials with high optical transparency and low electrical resistance. Research on graphene transparent antennas is reviewed along with our experimental demonstration. The unique features of graphene as a material for transparent antennas are introduced and compared to the characteristics of metal-based and metal-oxide transparent conductors. The challenges involved in the fabrication of transparent antennas using graphene films grown by chemical vapor deposition (CVD) are described. Fabrication techniques of transparent antennas (transfer and patterning methods) and techniques to decrease the sheet resistance of the graphene films (stacking and doping methods) are described. The performance of the CVD graphene transparent antennas we have fabricated are presented.

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Section: Carbon Reportsmentioning

confidence: 99%

Graphene transparent antennas

et al. 2023

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“…With the gradual rise of fifth generation (5G) wireless technology and the Internet of Things, the research and application of optically transparent antennas have received increasing attention in recent years [1][2][3][4][5][6][7]. Optically transparent antennas can be attached to the surface of various transparent substrates in applications that are not easily recognized by the naked eye and can play an important role in concealment and aesthetics [1][2][3][4][5][6][7]. Therefore, transparent antennas have been installed on vehicle glass, solar panels of satellites, architectural glass, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The substrate material and the conductive material of the antenna are key factors for the light transmission, flexibility, and stretchability of the antenna. So far, a variety of transparent substrates have been used to manufacture transparent antennas, including glass [1,3,12,13,[17][18][19], polyimide (PI) [2], polydimethylsiloxane (PDMS) [5], plexiglass [6], polyethylene terephthalate (PET) [7,20,21], polyvinyl chloride (PVC), and Ecoflex™. These materials are different in various aspects, such as dielectric properties, hardness, brittleness, and light transmission.…”

Section: Introductionmentioning

confidence: 99%

“…However, conductive oxides have problems of large square resistance and high brittleness. Researchers have tried to sandwich a conductor layer in the middle of the transparent conductive oxide [2,3,[17][18][19][20][21] or coat it with gold on its surface [1] to improve the conductivity of the transparent antenna. However, due to the limited thickness of the added conductor layer, the conductivity improvement is also limited, and the brittleness problem remains unavoidable.…”

Section: Introductionmentioning

confidence: 99%

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A Highly Transparent Flexible Antenna Based on Liquid Metal Mesh Film

Qin

Wang

Zhang

et al. 2023

International Journal of RF and Microwave Computer-Aided Engine

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In this paper, a convenient process for the fabrication of flexible liquid metal mesh films (LMMF) is proposed first. Then, the light transmittance and square resistance characteristics of LMMF are studied theoretically and experimentally. The light transmittance of the LMMF can reach 85% when the line width and spacing are 50 μm and 1000 μm, respectively. Furthermore, as an example of LMMF, a coplanar waveguide loop antenna is designed and fabricated that contains an LMMF with a line width of 50 μm and a line spacing of 500 μm. The measured square resistance and transmittance for the LMMF are 0.0456 Ω/sq and 72%, respectively. The measured peak gain of the antenna is 3.38 dBi while the average efficiency is 61%. The antenna’s working frequency covers most of the S-band, C-band, and X-band, as well as multiple channels of fifth generation (5G) communication. Therefore, the antenna can be used in fields such as radar and mobile communication. Uniquely, the fabricated antenna performs well in terms of light transmission, conductivity, and flexibility. In particular, it remains stable in stretching and bending deformation. As a highly light-transmissive stretchable flexible antenna, the antenna is equipped with various functions such as concealability, conformability, and reconfigurability. This LMMF-based antenna has good prospects for applications in the fields of flexible electronics and transparent electronics.

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“…[20][21][22][23] Antennas with 80% or more optical transmittance have been reported as antennas focusing on high optical transmittance. [24,25] However, the radiation efficiency of these antennas is less than 70%, so their performance as antennas remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

Transparent Antenna with High Radiation Efficiency and High Optical Transmittance Using Dielectric-metal-dielectric Composite Materials Based on ITO/Ag/ITO Multilayer Film

Koshiji

Yasuda

Yamada

et al. 2022

Transactions of The Japan Institute of Electronics Packaging

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Koshiji et al.: Transparent Antenna with High-radiation Efficiency and -transmittance (1/7) surface without compromising the product design and aesthetics.[4] Various materials, such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), silver-coated polymer (AgHT), and graphene, have been investigated as transparent conductive materials.[5-8] They have been applied to flat panel displays, smart windows, solar cells, gas sensors, and electrochromic materials.[9-11] However, in transparent conductive films, there is a trade-off between their conductivity and their optical transmittance.[12] The radiation efficiency of antennas operating at a few gigahertz-using transparent conductive films composed of a single material, such as ITO, with an optical transmittance of approximately 80%-is approximately 30% to 50%. It is thus difficult to obtain high radiation efficiency.[13] The application of thin metal wire grids to the transparent conductive films can increase their conductivity and radiation efficiency; however, the optical transmittance is significantly reduced.[14] Meanwhile, transparent conductive films composed of multilayer composite materials have been reported.[15] It has been reported that a

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Efficiency-Improved UWB Transparent Antennas Using ITO/Ag/ITO Multilayer Electrode Films

Cited by 12 publications

References 63 publications

Graphene transparent antennas

Graphene transparent antennas

A Highly Transparent Flexible Antenna Based on Liquid Metal Mesh Film

Transparent Antenna with High Radiation Efficiency and High Optical Transmittance Using Dielectric-metal-dielectric Composite Materials Based on ITO/Ag/ITO Multilayer Film

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