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In this talk, the current research status of China 5G is briefly introduced, including the candidate frequency bands, goal and key technologies etc. Then, the research advances in millimeter wave indoor and outdoor communications for 5G is presented. Especially, the research advance in IEEE 802.11aj(45GHz) or Q-LINKPAN in China is reviewed, which was proposed mainly by the authors and now is considered...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
Digital satellite broadcasting and digital terrestrial broadcasting have been launched in 2000 and 2003, respectively. Through these developments, the digital HDTV broadcasting spread out widely across Japan. In parallel, NHK has been advancing research and development of 8K Super Hi-Vision — ultra high-definition TV (UHDTV) surpassing the resolution of HDTV. 8K images are composed of horizontal resolution...
The 5G network will allow ultra-fast data transfer, significantly decrease latency, and also support massive connectivity of heterogeneous devices. Although the telecoms industry has already started working on 5G, network operators, vendors. and regulatory bodies have yet to agree on a standard for spectrum and radio technologies. To clear this hurdle and timely roll out commercial 5G services, KT...
As an effective approach for manipulating propagation of waves, transformation optics has inspired many novel applications during past decades. In this paper, our recent efforts in metamaterial devices for manipulation of waves in microwave region are reviewed with emphasis on (1) multifunctional device with three different kinds of electromagnetic properties, (2) homogeneous illusion device exhibiting...
Novel metasurface-backed loop antenna is proposed for ISM-band wearable devices. The antenna is printed on a small-area and thin substrate the bottom of which is designed to get the characteristics of artificial magnetic conductor(AMC) for acceptable antenna performances and robustness over human skin contact. The advantages and validity of the structure are verified by full-wave simulation and experiments.
Split-ring resonators (SRRs) and continuous metallic wires were used to realize double negative materials (DNGs). In this paper, we discuss two kinds of DNG structures with different periodic arrangement. One is the conventional model with air separation, and the other is the solid-state structure. Full-wave simulations are used to analyze the effective medium characteristics and the figure of merit...
We propose an active metasurface based on graphene magnetic resonator in reflection mode. The reflection angle is controlled by the phase gradient, which can be tuned by engineering the Fermi level distribution in the super-cell along the metasurface. By changing the period of the super-cell from n = 4 to n = 8 (thus the phase gradient of the metasurface), the beam direction is steered approximately...
We report the design of a metamaterial-based antenna beamformer that transforms 7 stipulated inputs to 7 prescribed output beams. The beamformer is printed and exhibits a broad bandwidth of operation. It is modeled as an inhomogeneous, anisotropic 2D medium, and is designed using an constrained optimization approach. This design technique offers improved flexibility and feasibility over coordinate-transformation...
In the last few years, much interest has grown in the control and manipulation of electromagnetic surface waves. The aim of this paper is to present a new design and manufacturing approach based on Transformation Optics. To validate the proposed design, an all-dielectric structure for surface wave propagation will be presented: the device shows good performance in terms of wide bandwidth, polarization...
It has been demonstrated that metamaterial-inspired electrically small antennas (ESAs) can be designed to have high radiation efficiencies and even large bandwidths with non-Foster circuit augmentations. However, being electrically small, it still remains a challenge to obtain directivities over interesting bandwidths which exceed those of simple dipoles, especially with only passive constructs. Different...
Low profile zeroth-order resonant antennas with monopole-like omnidirectional radiation in the horizontal direction with vertical polarization is proposed. It is composed of a rotationally symmetric mushroom structure including multiple metal patches and vias, a microstrip loop outside the patches, and a feed line connected to the outer loop. For comparison, conventional mushroom antennas with the...
In our previous report, the authors realized a slender omnidirectional leaky wave antenna with a single branch using CRLH line. This paper presents measurement results of a dual branch antenna orthogonally arranged the CRLH line. The diameter of the antenna including a cover is 0.14 wavelength at 3.5 GHz, and the antenna has high isolation characteristic.
This article presents a conformai integrated multi-layer thin-film antenna design implemented by novel LITA (Laser-Induced Integrated Thin-Film Antenna) technologies for smartwatch device applications. Through the proposed LITA technology which is jointly developed by ITRI and ACON in Taiwan, metal layouts of antennas can be formed on the internal surface of a smartwatch casing successfully with conform...
A single-feed compact dual-band antenna based on multi-branch monopole structure is proposed for LTE/WWAN handset applications. Its operational principles are illustrated via a series of parametric analyses, showing the origin and characteristic of each of the resonant modes. For verification, a prototype antenna was built, and the measured performance agrees well with those simulated.
This article presents a compact multi-layer handset phone 13.56 MHz NFC antenna design by novel LITA (Laser-Induced Integrated Thin-Film Antenna) technologies, which is jointly developed by ITRI and ACON in Taiwan. Through the proposed LITA technology, metal layouts of antennas can be formed on the internal surface of a smartwatch casing successfully with conformal, thin-film type, multi-layer and...
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