Graphene-based optically transparent dipole antenna

Kosuga, Shohei; Suga, Ryosuke; Hashimoto, Osamu; Koh, Shinji

doi:10.1063/1.4984956

Cited by 33 publications

(24 citation statements)

References 22 publications

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“…4(e) and 4(f), respectively. The graphene monolayer also shows potential applications as microwave antennas [89][90][91][92]. The metalinsulator reversible transitions of graphene via switch on the electrostatic bias for low surface resistance metal and switch off for high surface resistance insulator can efficiently control the microwave antenna's radiation patterns [93].…”

Section: Terahertz and Microwave Antennasmentioning

confidence: 99%

Graphene based functional devices: A short review

et al. 2018

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Graphene is an ideal 2D material system bridging electronic and photonic devices. It also breaks the fundamental speed and size limits by electronics and photonics, respectively. Graphene offers multiple functions of signal transmission, emission, modulation, and detection in a broad band, high speed, compact size, and low loss. Here, we will have a brief view of graphene based functional devices at microwave, terahertz, and optical frequencies. Their fundamental physics and computational models will be discussed as well.

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Section: Terahertz and Microwave Antennasmentioning

confidence: 99%

Graphene based functional devices: A short review

et al. 2018

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“…The angles in the radiation patterns are defined in Figure (A). We used two different horn antennas (WR‐90 and WR‐42) that have frequency ranges of 8.2‐12.4 and 17.6‐26.7 GHz for the measurements of the Au and graphene antennas, respectively, because the resonance frequency (f r ) between the Au and graphene antennas is not the same . The distance between them was kept at 2.5 m, which satisfied the far‐field condition.…”

Section: Measurements and Discussionmentioning

confidence: 99%

“…The CPW was tapered to 6 mm, adjusting to the width of an SMA connector. Other design details are reported a previous paper . We then designed the graphene‐based optically transparent dipole antenna shown in Figure (B).…”

Section: Design and Fabricationmentioning

confidence: 99%

“…Graphene layers were grown by CVD and transferred onto 1‐mm‐thick synthetic quartz substrates (10 × 13 mm 2 ). The detailed fabrication procedure of the graphene antennas are reported in a previous paper . An SMA connector was connected to the antenna using a conductive paste.…”

Section: Design and Fabricationmentioning

confidence: 99%

“…Graphene‐based flexible antennas, slot antennas, and electrically tunable antennas have been reported. Recently, we have demonstrated that an optically transparent dipole antenna fabricated using chemical vapor deposition (CVD)‐grown monolayer graphene can radiate microwave power in microwave bands . However, the radiation patterns and gain of the fabricated graphene antenna have not been characterized, and it has not been demonstrated that the graphene antenna operates as a half‐wavelength dipole antenna.…”

Section: Introductionmentioning

confidence: 99%

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Radiation properties of graphene‐based optically transparent dipole antenna

Kosuga

Suga

et al. 2018

Micro & Optical Tech Letters

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2.1 dB for the backward -z-radiation and 1.5 dB for the forward +z-radiation at 1.580 GHz and 2.230 GHz, respectively. The 3-dB AR bandwidths of about 15 MHz from 1.573 GHz to 1.588 GHz and 17 MHz from 2.223 GHz to 2.240 GHz were about 0.95% for the -z direction and 0.76% for the +z direction. The measured RHCP gain is observed by -4.55 dBic for backward radiation at 1.578 GHz and 0 dBic for forward radiation at 2.228 GHz. | CONCLUSIONThe novel microstrip antenna design method is investigated and demonstrated to reduce the cost and weight of a CubeSat payload. The single arrow-ended cross slot embedded on the ground layer is dually used for the slot antenna fed by the microstrip aperture and the perturbation of the square microstrip antenna. The capabilities of the dual-band bidirectional RHCP at the L1-band and S-band are obtained using a simple design and a single layered substrate. The results demonstrate the proposed antenna may be an excellent candidate for the wireless positioning and satellite communication of a CubeSat system. ORCID Seongmin PyoAbstract A compact wideband bandpass filter (BPF) with broad stopband using hybrid half-mode substrate integrated waveguide (HMSIW) resonator and open-circuit trisection SIRs (OTSIRs) is proposed. A BPF with 3 transmission poles (TPs) and 3 transmission zeros is obtained by cascading the HMSIW resonator and OTSIRs using J and K inverters. A demonstrated wideband BPF with

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Utilization of Synergistic Effect of Dimension‐Differentiated Hierarchical Nanomaterials for Transparent and Flexible Wireless Communicational Elements

Sun

Liu

Qiu

et al. 2020

Adv Materials Technologies

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as an essential part of the IoT network has attracted much attention in many areas such as wearable applications. Fully optical transparency becomes one of the necessities for these devices, e.g., a recent study reported an under-screen transparent antenna array, which was utilized in the assembly of next-generation cellphones. [1] The real-time noninterruptive transparent and flexible wireless communicational devices are needed in a wide range of scenarios. For example, transparency is in exact need in applications such as smart contact lenses for not blocking the user's vision while enabling the noninvasive method for continuous medical diagnosis. [2,3] Furthermore, on top of transparency, flexibility is also a very important ingredient, especially for wearable devices. Excellent flexibility of such wireless electronics is also necessary in order to closely match the curvature of the eyeballs, reducing the discomfort of patients. [4] To fabricate transparent and flexible wireless devices, the main challenge remains the realization of transparent and flexible antenna. Therefore, the demand of transparent and flexible antenna has been rapidly growing in recent years.The demand of emerging transparent and flexible wireless electronic devices is ever-increasing for Internet of Things (IoT) scenarios, like noninvasive healthcare, real-time wearable electronics, etc. However, as an essential part of the IoT wireless communicational devices, radio frequency (RF) antennas are still hampered by poor-flexibility, low-conductivity, and weaktransparency. Here, based on the unique electronic and optical properties of graphene, a method to obtain these appealing features concurrently through promoting synergistic effect between two-dimensional (2D) and one-dimensional (1D) materials is studied. It is found that this method could not only successfully maintain transparency and flexibility, but also greatly enhance the overall performance of the antenna. The fabricated antenna exhibits a 75% light transmittance, from 5.6 to 12.8 GHz ultrawide bandwidth and outstanding durability and stability. Moreover, a transparent and flexible radio frequency identification (RFID) tag is also designed and demonstrated with a remarkable reading distance. These findings show that the method by promoting synergistic effect of hybrid materials has great potential in the design of next generation novel and high-performance wireless electronics.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Graphene-based optically transparent dipole antenna

Cited by 33 publications

References 22 publications

Graphene based functional devices: A short review

Graphene based functional devices: A short review

Radiation properties of graphene‐based optically transparent dipole antenna

Utilization of Synergistic Effect of Dimension‐Differentiated Hierarchical Nanomaterials for Transparent and Flexible Wireless Communicational Elements

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