Power management and charging of batteries for wireless sensors become a problem when using them in the field applications. In this paper, we present RF energy harvesting circuit with three different approaches: resonator, number multiplier stages low pass filter (LPF). Resonator provide 30 times improvement amplitude input (100 mV) AC signal. proposed L type network, between power source rectifier, works as resonator well matching network at resonant frequency. It results maximum efficiency...

A microstrip feed, double-sided printed monopole antenna is presented for radio frequency (RF) energy harvesting application. The structure consists of a circular patch with truncated ground plane. plane rectangular notch right below the feed line, which helps to increase bandwidth antenna. In addition, using in increases effective area radiator due loading effect, leads downshifting lower cut-off frequency, and subsequently enhancement. It found that provides total size reduction 35.2%...

Abstract This paper addresses the crucial need for a non-invasive method precisely detecting subsurface defects in wooden logs. The utilises ground penetrating radar (GPR) technology which has potential to be implemented real time saw mills near future. Internal such as knots, decays and embedded metals are of great concern lumber production. Nondestructive scanning logs using GPR detect prior sawing can greatly increase productivity yield high value defect-free by optimal orientation blade,...

This letter reports a first time study on enhanced temperature (~800°C) stability of type-IIa as compared with type-I fiber Bragg gratings (FBGs) written by high repetition rate (5.5 kHz) 255 nm UV beam. Both the FBGs were in photosensitive Ge doped (~10 mole%) single mode without hydrogen loading. survived 800°C over 9 h, however, fall FBG reflectivity was ~3 times lower type-I. The is attributed to core-cladding stress release strong seed grating highly stabilized interference fringes and...

In this study, a rectenna operating at the GSM-900 frequency band has been fabricated and tested. This composed of 2 × 1 T-shaped monopole array antenna an energy processing circuit. order to reduce gap between adjacent elements in structure, proposed uses ground stub. Compared with other antennas, stub reduces size up 50% without affecting gain bandwidth. An prototype is experimentally The measured antenna's bandwidth are 3.2 152 MHz, respectively, hence showing its suitability for...

This paper presents a broadband hybrid slot-dielectric resonator antenna for radiofrequency (RF) energy-harvesting application. The geometry consists of simple pentagon-shaped dielectric (PDRA) excited by microstrip feed underlying rectangular slot with narrow notch. It is investigated that the bandwidth proposed PDRA improved significantly owing to electromagnetic coupling between feeding and resonator. measured results demonstrate achieves an impedance 110.8%, covering frequency range from...

This paper presents the first-time results on design and implementation of a fiber Bragg grating (FBG)-based distributed temperature sensor up to 500°C in high-voltage high-electromagnetic interference (EMI) environment. The multiple FBGs at different peak wavelengths were inscribed single length 2 m spacing about 30 cm by controlling geometrical divergence highly coherent UV (255 nm) beam falling biprism. developed multipoint is tested high-EMI environment such as copper bromide (CuBr)...

An effective performance enhancement model for the thin film solar cell conjointly based on extraordinary transmission and nanoantenna is proposed investigated. The absorber layer of contains a metallic with periodic holes. Maximum accomplished as has same refractive index both sides. Increased light causes to absorb more light, which increases short circuit current density subsequently efficiency cell. presented analysis demonstrates that adding square nano patch top surface can further...

AbstractIn this manuscript, a new vertically stacked GaSb-source stepped oxide split-pocket vertical dielectrically modulated tunnel field effect transistor (SOSPVDMTFET) is presented for the first time. The novelty of device lies in its oxides with full gate length cavity and n + split-pockets source region. These design features significantly suppress ambipolar current at drain/channel junction improves drain (ION), subthreshold swing (SS), threshold voltage (Vth), ratio (Iratio). In...

Higher altitude platform (HAP) is considered in this paper for broadband wireless communication at millimeter wavelengths. Path loss due to vegetation calculated using exponent decay model. Excess path also the presence of summer and winter season. Rician factor seasonal excess wind Delhi (India) based HAP link. Channel capacity loss.

This paper focuses on various design constraints of radio frequency energy harvesting circuit (RFEHC). Matching networks such as L- and Π-type are used to investigate the RFEHC performance. The simulation results show that yields improved output voltage while using a matching network high-Q value. Further, theoretical analysis efficiency gain under different load conditions lumped element values is discussed. A tradeoff between maximum bandwidth observed for given impedance. Moreover,...

A novel compact rectifier for dual-band operation in the RF energy harvesting is presented. The circuit comprises a 4th order impedance matching and single-series with one double diode, both are integrating into shape to occupy small area of 30×35mm2. merit proposed that it can be extended n number frequency band by using only 2×n elements. To validate design method experimentally, prototype fabricated two public telecommunication bands GSM-900 1800. In reduce complexity sensitivity arising...