In this letter, a multioctave voltage doubler rectifier using T-type matching network is demonstrated. The topology used to flatten the load impedance, which makes it easier achieve broadband impedance matching. for input design procedure of proposed provided and discussed. For validation, prototype fabricated, performance evaluated. measured results exhibit power conversion efficiency (PCE) more than 50% over frequency band 0.2–3.2 GHz at 15 dBm 70% from 1 2.7 GHz. Moreover, peak PCE 78.2%...

To reduce the weight of a satellite, an internal wireless system (IWS) for satellites was proposed in previous study. It is that can communicate between satellite's subsystems by using communication modules. In this paper, we propose complete IWS satellite microwave power transmission technology. The design 5.8-GHz high efficiency rectifier circuit-based charge pump circuit also presented. Furthermore, introduced class-F load process third harmonic components. rectifying efficiencies normal...

To achieve a high-efficiency microwave wireless power transfer system, high conversion efficiency rectifier is necessary. Brown (1974) designed rectifiers with approximately 3-W input achieved 90% for 2.45 GHz, and it maintains the record maximum efficiency. In this study, to design high-power rectifier, we larger semiconductor metal junction area GaAs Schottky diodes possessing very low series resistance breakdown voltage. addition, built SPICE model package diodes. The 91% at 5-W GHz.

This paper put forward a hybrid energy harvester for collecting RF and solar in quad-band (GSM-900/1800, ISM-2400 WiMAX-3500). By introducing diverse parasitic structures, good impedance matching with unidirectional radiation is achieved the multi-band. Below antenna, low-power rectifier circuit employed to achieve broadband rectification. Under input power of 0 dBm, maximum RF-DC conversion efficiency 56.94% realized. Accordingly, collects individually or simultaneously, then converts it...

Abstract Desiccation cracking is a common phenomenon of soil, which potentially affects irrigation and crop growth in farmland. Understanding behaviour aids developing an effective means crack prevention or utilization. In the present paper, we report on phenomenological investigation aimed at exploring effects methods soil during wetting–drying cycles. Nine identical specimens were prepared subjected to three (surface irrigation, sprinkling drip irrigation) Specimen was monitored by digital...

Pavement macrotexture contributes greatly to road surface friction, which in turn plays a vital role reducing accidents. Conventional methods for measurement are either expensive, time-consuming, or of poor repeatability. Based on multi-view smartphone images collected situ, this paper develops and evaluates an affordable convenient alternative approach pavement measurement. Photogrammetric computer vision techniques first applied create high resolution point clouds the pavement. Analytics...

For reducing the development period of satellite, we propose an internal wireless system satellite. In this paper, designed a highly efficient 5.8 GHz rectifier based charge pump circuit, and introduced class-F load that can make it on process third harmonic wave. adjusting most suitable applied voltage diodes, new filter. Owing to inserting filter into conversion efficiency increase 82% at 30 mW in circuit simulations. addition, output is higher than 5 V 1700 Ω.

Microwave power transfer (MPT) can solve certain types of problems. For example, Internet Things requires a flexible configuration sensor networks, which is hindered by wired-charging sensors. This problem be overcome MPT techniques. However, the transmission efficiency lower than that wired transmission. study focuses on operation rectifiers having pulse-modulated input signal. Although wave effective for improving RF-DC conversion efficiency, output voltage waves have high ripple content....

By providing a detailed analysis of the particle swarm optimization (PSO) principle and job-shop scheduling problems, this paper presents new hybrid discrete GAPSO combining genetic strategy. Adjusting factors are introduced to regulate generation convergence; proposed algorithm is tested by set benchmark problems. The results obtained show good convergence algorithm. On basis, event-driven strategy for dynamic JSP proposed, with regard some uncertain events like inserting jobs machine...

This paper analyzes the current research status of steel sintering ingredients at home and abroad, compares optimization algorithms used in ingredients. The linear programming method has been relatively mature, easy to operate; But solve complex nonlinear large-scale problem, genetic algorithm, particle swarm algorithm are more efficient. burden process is an important part process, key link studies. In future research, advantages each can be combined problem better.

An internal wireless system (IWS) for satellites was proposed in a previous study to reduce the weight of satellites. It is that uses communication modules communicate between satellite's subsystems. We complete IWS employs microwave power transmission technology, and we design GHz band high efficiency rectifier based charge pump rectifiers with class-f filter called rectifiers. theoretically compare diode losses single shunt rectifier, experimentally verify results. Apart from this,...

Based on the low turn-on voltage of GePb-based semiconductor materials, a Schottky diode for low-power microwave power transmission and energy harvesting is present in this paper, conversion efficiency rectifying circuit based SPICE model device significantly improved under input power, which will provide technological support development space solar station, wireless sensor network other technologies.

Rectifiers performance affects the overall efficiency of microwave wireless power transfer systems. The rectifier device (usually used Schottky diode) determines upper limit rectifier. In order to improve and input rectifier, we designed prepared thin barrier AlGaN/GaN heterojunction devices. achieved 80% conversion operates at 5.8 GHz with maximum 28.5 dBm.

Predicting soil–water dynamics in Moistube irrigation (ΜΤΙ) favours understanding ΜΤΙ functioning mechanisms and technical parameter design. This study proposed a physically based infiltration (PH) model extending the Green–Ampt (GA) to two-dimensional polar coordinate system. We treated as clay considered from internal surrounding soils. The performances of PH model, together with semi-physical–empirical (PH–EM) numerical simulation (NUM) were evaluated on regulated working pressure head...

To reduce the weight of a satellite, an internal wireless system for satellites was proposed in previous study. It is that can communicate between satellite's subsystems by communication modules. In this paper, we propose complete satellite using microwave power transmission technology and present design 5.8 GHz high efficiency rectifier circuit-based charge pump circuit. Further, introduced class-F load processes third harmonic component. We compare rectifying efficiencies single shunt...

The paper presents a scheme of high dynamic GNSS digital receiver using FPGA xc4vsx55 XILINX and DSP TMS320VC6701 TI as core controller. Besides brief introduction design hardware structure, the comprehensively introduces implementation algorithms fast acquisition tracking spread spectrum signal in environment. Through optimized design, both C code (coarse ranging code) P (precision are realized one chip FPGA, under control DSP. Employing FFT-based algorithm, unit realizes by duplicated two...