Our progress in 120-GHz-band wireless link technologies enables us to transmit 10-Gbit/s data transmission over a distance of more than 1 km. The uses high-speed uni-traveling carrier photodiodes (UTC-PD) and InP high-electron mobility transistor (HEMT) millimeter-wave (MMW) monolithic integrated circuits (MMICs) for the generation MMW signals. We investigate maximum output power these devices compare phase noise signals generated by UTC-PDs HEMT MMICs. describe antennas we used their...

We have developed a 120-GHz-band wireless link whose maximum transmission data rate is 11.1 Gbit/s. The uses millimeter-wave monolithic integrated circuits (MMICs) for the generation of signal. MMICs were fabricated using 0.1-mum-gate InP-HEMTs and coplanar waveguides. can handle four kinds OC-192 10-Gbit Ethernet standards with without forward error correction (FEC). succeeded in error-free 10-Gbit/s signal over distance 800 m. introduction FEC into decreased minimum received power...

We present a terahertz wave wireless link operating at 300 GHz which has potential for use in ultra fast future services short range. Terahertz was generated and modulated with photonic technologies the transmitter, allowing us to radio on fiber system concept as well. For receiver, we used Schottky barrier diode detector integrated planar antenna. With link, error free data transmission 12.5 Gbps experimentally demonstrated. Taking performance margin of transmitter receiver into...

We have developed 120-GHz-band wireless equipment that can transmit 10-Gbit/s data signal over a distance of more than 5 km. In order to increase the output power the120-GHz-band equipment, we used millimeter-wave amplifier integrates 0.08-μm-gate-length InGaAs/InP composite-channel high-electron-mobility transistors. The becomes 16 dBm. handle rates 1 Mbit/s 11.1 Gbit/s and 10-Gbit/s-class signals with without forward error correction (FEC). conducted transmission experiments 4.8 km 5.8...

8 Gbit/s wireless data transmission using a 250 GHz millimetre-wave carrier signal is demonstrated. Photonic devices and technologies, including an electro-optic modulator J-band uni-travelling-carrier photodetector (UTC-PD) module, were used for the transmitter. In addition, high-efficiency Schottky barrier diode detector monolithically integrated with ring slot antenna was developed fabricated receiver on same epi-layer as UTC-PD.

The transmission characteristics of a 120-GHz-band millimeter-wave wireless link are described. uses photonic technologies for generation, modulation, and signals. This configuration enables set up the generator transmitter core separately; therefore, can be used as kind radio-over-fiber system. effects transmitting optical subcarrier signals through single-mode fibers were theoretically experimentally investigated. It was confirmed that time shift code edges, because chromatic dispersion,...

A pseudo-traveling-wave resonator with magnetically tunable phase gradient of field distribution is investigated, and a new type beam-steering antenna based on the experimentally demonstrated for first time. It short-ended transmission-line composed nonreciprocal phase-shift composite right/left-handed transmission line using polycrystalline yttrium-iron-garnet rod. The operates as zeroth-order if there no dc magnetic field, radiation beam directs to broadside. By increasing an externally...

This paper describes the fabrication process of quarter-micrometer-gate fully depleted CMOS/SIMOX devices, which is characterized by a new lateral isolation technique that can easily achieve 30-nm-class surface planarization and 0.2-/spl mu/m-class with no degradation device characteristics. The distinctive feature this to use high-temperature two-step LOCOS oxidation. devices have 50-nm-thick body regions dual N/sup +//P/sup +/ poly-Si gates so they surely operate in mode. By applying CMOS...

We measured the effects of rain attenuation on 120-GHz band wireless link during heavy rainy period (from July to September, 2008) and annual March December, 2008). The data are used as a basis for design, calculate reliability link. with V polarization was operated 400-m-long path from December 2008 in Atsugi, Japan. rate distribution Atsugi is good agreement conditional M distributions. As attenuation, coincide ITU Laws Parsons models. Cumulative distributions bit-error-rate deterioration...

Epitaxial growth of SrO thin films onto Si(111) and (100) substrates by means molecular-beam epitaxy has been demonstrated. The orientation relationships between epitaxial Si were found to be (111)SrO//(111)Si [112̄]SrO//[112̄]Si, (100)SrO//(100)Si [011]SrO//[001]Si. composition the grown was Sr:O=1:1. In addition, it shown that possible grow layers with no surface oxidation noticeable interdiffusion at interfaces. These possess a low dielectric constant (3.0) high breakdown field (5×106 V/cm).

This article describes a network concept called the wide area ubiquitous (WAUN) and its research activities. WAUN is for sensors actuators, can support low-end wireless terminals, which are expected to be used new applications. Among many types of R&D being performed in project, this focuses on feasibility basic feature target. The "wide coverage using very-low-power-consumption terminals," specific target "5-km cell radius 10-mW transmission power terminals with battery life 10 years."...

Abstract We propose a Y configuration power router as unit cell to easily construct delivery system that can meet many types of user requirements. The controls the direction and magnitude flows between three ports regardless DC or AC. constructed prototype three‐way isolated DC/DC converter is core router. electrical insulation assures safety reliability for network systems. then tested operation flow control. experimental results revealed our methodology based on governing equation was...

We have proposed a human-area networking technology that uses the surface of human body as data transmission path and an AC electric field signal below resonant frequency body. This aims to achieve “touch connect” intuitive form communication by using propagates along body, while suppressing both radiating from mutual interference. To suppress radiation field, excites transmitter electrode must be lowered, sensitivity receiver raised reducing power its minimally required level. describe how...

We have developed a 120-GHz-band wireless link that uses MMICs for the generation, modulation, and amplification of 125-GHz signals. succeeded in error-free (BER=10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup> ) transmission 10-Gbit/s signal over distance 800 m, maximum was estimated to be about 2 km.

In recent years, the demand for high-reliability systems has been on rise, while DC power distribution are widely used in data centers. The authors propose a system that uses triple active bridge (TAB) DC-DC converter, toward realization of such higher-reliability systems. TAB converter is based an isolated and can control flow among three ports. First, this paper presents basic procedure using phase-shift control. Further, two types proposed converter. experimental design simulations...

Emerging technologies for long-range broadband wireless link systems were introduced. The common problem presented is how to construct a 10-Gb/s modem block with better performance at low cost. A single-carrier system simple modulation technique has the advantages of cost and fast deployment. However, drawback poor spectral efficiency. using multiple carriers enables higher-order modulation; nevertheless, hardware presently very expensive. We described circuit design ICs their waveguide...

We discuss a novel communication technology that uses the human body as path. The conventional body-channel systems are composed of only transceivers (TRX) on body. Our proposed system is not (wearable TRX) but also embedded in floors, PCs, equipments, etc (embedded TRX). Therefore, our broadens fields application. To estimate transmission quality system, we measured packet error rates (PER) between wearable TRX and an TRX. PER during downlink was better than uplink. describe method for...

An autonomous DC microgrid system that uses a triple active bridge converter as power routing unit is proposed. A control can independently manage the transmission between each port needed to construct microgrid. This paper describes how decoupling flow implemented in prototype (TAB) rated at 400 V, 10 kW, and 20 kHz. The validity of was demonstrated by measuring step response TAB converter. experimental waveforms show converges command value within specified integral time constant T <sub...

An extremely low-power CMOS/SIMOX divide-by-128/129 dual-modulus prescaler that operates at up to 1 GHz and dissipates 0.9 mW a supply voltage of V is presented. The capable 2-GHz performance with dissipation 7.2 2 V. This superior primarily achieved by using an advanced ultrathin-film process technology combined circuit configuration uses divide-by-2/3 synchronous counter. Using these same technologies, single-chip CMOS phase-locked-loop (PLL) LSI the developed was fabricated. It can...

We have demonstrated that a superconductor-insulator-superconductor (SIS) mixer pumped by photonic local oscillator (LO) covers the whole frequency range of 0.2–0.5THz. In bandwidth 74% center frequency, this single-band receiver exhibits noise temperature TRX⩽20hf∕kB, where h is Planck’s constant, f and kB Boltzmann’s constant. Resultant TRX almost equal to identical SIS three conventional frequency-multiplier-based LOs which share 0.2–0.5THz band. This technique will contribute simple,...

This paper describes our recent challenges for ultrahigh-speed wireless communications technologies using millimeter and terahertz waves. Instrument-limited 14-Gbit/s transmission has been demonstrated at 300 GHz.

We propose a Y-configuration power router as system component to easily construct distribution that meets the requirements of many types user. The controls direction and magnitude flow among three ports regardless DC AC. fabricated prototype three-way isolated DC/DC converter is core demonstrated control operation. experimental results revealed our methodology based on governing equation was an effective means controlling converter.

In this paper, we present a microwave photonic technique to produce noise signal from the sub-terahertz region with an optical amplified spontaneous emission noise, filter, and photodetector. With scheme, it is easy control level by simply controlling input power. addition, output spectral density scheme can be accurately estimated well-known shape of filter. For demonstration as source, figure measurements for commercial devices such amplifiers mixer, were performed in frequency range...