Reconfigurable meta-surface reflectors, which are key components of intelligent radio environment (IRE) and reflecting surfaces (IRSs), have recently been gathering attention as a solution for coverage hole problems mobile communication areas. In recent researches, many proposals related to reconfigurable reflector using diodes new materials such liquid crystal (LC) graphene reported. Although metasurface reflectors the capability control reflection waves, it remains concept simulation in...

Intelligent reflecting surfaces (IRSs) have been attracting attention as a solution to coverage hole problems in millimeter-wave communication areas. They are considered be one of the key technologies next-generation mobile systems. Since polarized multiple-input-multiple-output (MIMO) is utilized systems deliver high-speed data transmission, an IRS also required applied for MIMO and reflect signals wide angle range. To realize MIMO, signal each polarization same direction with high...

The problem of a sheet LCD using plastic substrates is the narrow viewing angle large retardation typical materials. We have developed optical compensation and new process for IPS-LCD with wide angle.

The liquid-crystal molecular order near the rubbed polymer surface is reexamined by improved torque balance method. azimuthal anchoring strength measured method several times larger than that believed conventionally, considered to be significantly affected phase-transition behavior. Based on this result, it can argued correlation between rubbing and should in consideration of mechanism order.

In this paper, the development of a series fixed-frequency heterojunction bipolar transistor (HBT) oscillators from W- to D-bands is reported. The are designed based on feedback theory with small-signal equivalent circuit. This design method enables achievement high-output-power for management power that generated at current source inside HBT. We use 1 /spl mu/m/spl times/10 mu/m single-emitter InGaP/InGaAs HBT as an active device each oscillator, and 50-/spl Omega/ coplanar waveguides...

A monolithic sampling head IC composed of a resonant tunneling diode (RTD) for the pulse generator and Schottky barrier diodes bridge has been developed. The RTD was made using an In/sub 0.53/Ga/sub 0.47/As-AlAs structure (pseudomorphic strained superlattice). For this type high switching voltage RTD, peak-to-valley ratio (P/V ratio) 9 at 202 degrees C peak-to-peak voltages 1.5 V or more room temperature were achieved. from (In/sub 0.47/As)/sub 0.5/(In/sub 0.52/Al/sub 0.48/As)/sub 0.5/...

Abstract We investigated an autostereoscopic 3D display using a Liquid Crystal Gradient Refractive Index (LC GRIN) lens, called LCL (Liquid Lens) display. The characteristics of the are high luminance and switchable 2D images by switching between states lens non‐lens. does not influence image quality. However, crosstalk is relatively compared with other methods used in displays, such as barrier type, lenticular so on. Therefore, we have reduction for

This paper reports on a fully monolithic W-band Schottky diode downconverter with an IF amplifier using heterojunction bipolar transistors (HBTs). We use coplanar waveguide (CPW) as transmission line element for rat-race, because CPW requires one-side wafer processing only. The conversion gain is +9.5 dB the HBT and -8.8 without at RF of 95 GHz. isolation from LO port to 29 27 amplifier.

Abstract In‐cell retarder technology enables two kinds of display modes with different features to be realized in the pixels transflective LCDs. Using this concept, we have developed a prototype 2.2″ QVGA LCD that combines transmissive IPS for wide viewing angle performance and reflective in‐cell ECB high reflectance.

A 64 GHz monolithic fundamental frequency oscillator was fabricated using an AlGaAs heterojunction bipolar transistor (HBT) technology which performs a unity current gain fT = 100 and maximum of oscillation fmax 180 GHz. This uses co-planar waveguides (CPWs) for transmission lines resonators.

In this paper, the development of 104 and 134 GHz InGaP/InGaAs heterojunction bipolar transistor oscillators is reported. The oscillator exhibits an output power -3.4 dBm with a phase noise -95 dBc/Hz at 1 MHz offset. -10.4 -72 To our knowledge, highest-frequency fundamental mode using device technology ever

The switching process of BiNem liquid crystal displays (LCDs), which has been so far argued, is reexamined from the viewpoints anchoring breaking and flow effects. By numerical simulation based on continuum theory nematic crystals, between two stable states was investigated by changing surface condition LCDs to optimize bistable conditions. From results director distributions, polar distinguished clearly azimuthal in switching. regime observed be limited strength at slave plate; therefore,...

Abstract We investigate a 3D display using Liquid Crystal Gradient Refractive Index (LC GRIN) lens and the factors needed to decrease crosstalk. Crosstalk in latest displays LC GRIN lenses is 0.6%.

Abstract This paper describes the development of auto‐stereoscopic three‐dimensional (3D) display with an eye‐tracking system for not only X ‐axis (right–left) and Y (up–down) plane directions but also Z (forward–backward) direction. In past, 3D XY ‐axes that we had developed a narrow viewing space in direction because occurrence crosstalk variation on screen. The screen was occurred when viewer's eye position moved back forth along reason liquid crystal (LC) barrier pitch fixed LC able to...

組織からの散乱光のパワースペクトルの積分強度は, 光子と動いている赤血球間の平均衝突回数 (m) が1以下ならば, 組織中の血液量に比例する. 我々は血流モデルシステムの粒子分散液の粒子密度と, パワースペクトルの積分強度の関係を示す. さらにこの方法を用いて組織血流量と組織血液量を測定するレーザー血流計により, 犬腸管の組織血流量 (FLOW) と組織血液量 (MASS) の関係を調べた. 犬腸管の組織血流量は, 定量ポンプによって制御される注入血液量と比例関係にあった. しかし, 組織血液量は注入血液量に依存せず, ある一定の注入血液量以上ではほぼ一定であった. さらに組織血流量と組織血液量の間には相関がなかった.

Abstract Plastic liquid crystal displays (LCDs) termed sheet LCDs with transparent polyimide (PI) substrates were constructed. There is a lot of potential to expand the use these in LCD applications. Herein, we investigated structure for such as high‐density main post spacers (PSs) and PI aid barrier layer control residual stress protect from moisture. Drawing on this, propose an ultra‐narrow border that makes developed LCDs. The most significant improvement four borders can be folded wrap...

For next-generation mobile communications, the application of millimeter wave bands is being explored for high-speed and large-capacity communications. However, coverage holes occur because waves are found to be blocked by objects. To overcome this problem holes, we have developed a reconfigurable liquid crystal metasurface reflector applying thin film transistor display technology. The was designed operate at 28 GHz, measurement findings confirmed that reflection phase control range 260°...

Plastic film IPS‐LCDs were fabricated with transparent polyimide (PI) substrates. Conventional PI substrates have a large coefficient of thermal expansion and cause high retardation in thickness direction. We developed new fabrication process sheet design that improves upon these characteristics.

Polymer-stabilized ferroelectric liquid crystals (PS-FLCs) photocured in the SmA phase can show monostable V-shaped electrooptical characteristics. In this study, we have researched influence of fabrication conditions such as polymer concentration, cell gap, and alignment film materials on characteristics PS-FLCs. As a result, it is confirmed that capability strongly depends concentration. However, driving voltage increases concentration increases. Therefore, to fabricate practicable PS-FLC...

This paper describes the design and performance of a high-speed 6-bit ADC using SiGe HBT for measuring-instrument applications. We show that Gummel-Poon model suffices modeling then we describe folding/interpolation architecture as well simple, differential circuit are suitable with HBT. Measured results nonlinearity is within /spl plusmn/1/2 LSB, effective bits 5.2 at an input frequency 100 MHz 4.2 200 768 MS/s. also some issues ADC.

In this study, we focus on vertical alignment ferroelectric liquid crystals (VA-FLCs), because an FLC display with a high contrast ratio is expected. the VA, although normal of smectic layers to substrate surface, director molecules must tilt surface at angle molecules. Thus, it usually difficult obtain uniform VA in FLCs. We determine optimum conditions for fabrication VA-FLC cells terms molecules, anchoring strength film, and cell gap. Results indicate that small tends form good which can...

Reconfigurable meta-surface reflectors are a promising technology to overcome the problem of coverage holes in millimeter wave communications. This reflector is composed many tunable passive elements, whose reflection amplitude changes depending on phase. Thus, fill with higher reflected power, it necessary design scattering pattern considering both phase and amplitude. However, previous studies, which focus adjustment reconfigurable reflector, assume that constant regardless In this paper,...

Polymer-stabilized ferroelectric liquid crystals (PSFLCs), in which photocurable mesogenic monomers are doped into and UV photocure is carried out the SmA phase, can show monostable electrooptical characteristics. In this research, we have investigated dependence of characteristics PSFLCs on ratio binary mixture monomers. As a result, it found that polymer anchoring strength acrylic acid does not moiety be almost ignored, monomer controlled by variation their ratio.

The Intelligent reflecting surface (IRS) has recently been attracting attention as a solution for coverage hole problems in mobile communication areas. Since the reflection range of IRS depends on each direction and beamwidth IRS, half-power (HPBW) becomes an important parameter to reflect signals user equipment widely distributed hole. On other hand, power decreases HPBW increases. Therefore, design pattern with appropriate is sufficient desired range. Although conventional method, which...