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The main purpose of this paper is to analyze the electrostatic and electromagnetic interferences of HV power lines on aerial metallic pipeline. The proposed modelling is based on charge simulation method (CSM) and Efficient Simulation Method (ESM) coupled with Genetic algorithm (GA). This is typically done for safety reasons, to ensure workers who come into contact with the pipeline and to protect...
A novel single-wire power transmission system (SWPT) was introduced in this paper. This system consists of the transmitter and the receiver which are connected via only single-wire. The Tesla's transformer is used in both the transmitter and the receiver. The electric energy was transmitted through the spatial electric field between the transmitter and the receiver. In this paper, the lumped-parameter...
This work deals with the known problem of forecasting overall capacity and viability of a complete distribution feeder as the medium for Power Line Communication (PLC). The estimation involves previewing the input impedances and power loss for each coupling arrangement on every position pair at the feeder, calculated for frequencies between 9 kHz to 10 MHz. When we deal with PLC in primary distribution...
On the basis of analyzing the structural characteristics of low-voltage power distribution network, the input impedance of out-door low-voltage distribution network is measured and analyzed. Taking a university laboratory and a residential neighborhood as representative, the input impedance of the low-voltage distribution network within the frequency band from 1MHz to 30MHz is measured. The results...
A comparison of coplanar waveguides (CPWs) for MMIC applications fabricated on AlGaN/GaN HEMT heterostructures grown on both high-resistivity Si (GaN-on-Si) and semi-insulating SiC (GaN-on-SiC) substrates is reported. In addition to the two substrate types, two fabrication process flows-one suitable for mesa-isolated MMICs and the other appropriate for MMIC flows incorporating implant isolation-were...
We have studied a high impedance antenna in order to improve the rectifier efficiency for energy harvesting applications. Folded dipole antenna (FDA) with high impedance of over 10 kΩ is proposed. To obtain higher impedance stepup ratio compared with the conventional FDA, an FDA consisting with three strip conductors is investigated. Impedance stepup ratio is calculated and the results in theory,...
This paper proposes a novel design of low profile wideband artificial magnetic conductor (AMC) surface structure. The ±90° reflection phase bandwidth of the AMC surface is 7.93–12.23 GHz (S11≤ −10 dB), while the 0° reflection phase center frequency is 10 GHz. With the utilizing of the 6 × 6 AMC surface, a patch antenna can achieve a bandwidth enhancement of 233% and increased gain of more than 2 dB...
Characteristic mode (CM) theory is widely used nowadays for analysis and design of radiation and scattering problems. In this paper, we discuss the recent developments of advanced characteristic mode theory and its applications in complex electromagnetic (EM) problems. Following the deep physical insights into the radiation and scattering mechanisms of complex electromagnetic open problems, the effective...
Accurate modeling of planar transmission line is very important in microwave communication and radar systems, especially at high frequencies. The present paper computes the conductor loss of planar transmission line in full-wave band by the method of lines considering the surface roughness. The new concept presented here derives a complex surface impedance from conductivity Gradient Model, reflecting...
An efficient hybrid method of SJMCFIE combined single integral equation with the electric/magnetic current combined field integral equation is used for analysing scattering from composite conductor and multiple dielectric objects, in which, SIE can reduce one half unknowns in dielectric regions. SJMCFIE can greatly reduce the storage requirement. Moreover, Multilevel Fast Multipole Algorithm is employed...
The transmission characteristics of a two-dimensional coaxial Bragg structure have been investigated in this paper. The dielectric layer between the outer and the inner conductors of the coaxial waveguide in the structure is helically corrugated and the grooves are loaded with a metallic strip. It is found that, a dominant transmission bandgap can be obtained from the mode conversion induced by the...
In this paper, we design an all-dielectric polarization conversion metasurface using high-permittivity ceramics. The metasurface is composed of 2D arrays of ceramic resonators. A nearly 1 GHz polarization conversion is demonstrated in 3.68–4.64GHz. Since such polarization conversion metasurface are made of high-permittivity ceramics, they are of important values in high-temperature or high-power applications...
A class of 3D printed waveguide structures is presented based on the epoxy coating. An arbitrary 3D structure of a waveguide system is designed and fabricated by 3D printing technique. Then, the whole structure is dipped into a low viscosity solution of silver epoxy and Isopropanol in order to coat a conductor layer on the inner surfaces of the waveguides. The ordinary coaxial cables are used to feed...
Capacitance macromodel is a novel idea recently proposed for encrypting sensitive structures and bringing acceleration in the capacitance extraction of integrated circuits. The existing technique of macromodeling employs boundary element method (BEM), but may lead to unreliable results due to computational error. In this work, we present the technique of generating the capacitance macromodel based...
Based on the requirement of gain improvement and directivity in the wireless communication, we proposed a “V” antenna reflector, which belongs to a kind of artificial magnetic conductor (AMC). The reflector could be placed near the antenna and does not change the antenna's design. It contains two planar reflectors built from air loaded AMC units on two layer dielectric substrates. The gap of air loaded...
Based on the reflecting phase properties of the artificial magnetic conductor (AMC), a broadband low radar cross-section (RCS) reflection screen is designed by combining two types of AMC cells in a novel pattern in this paper. By partially modifying AMC units on the diagonal of the traditional chessboard patterned AMC blocks, the AMC-based reflective screen is designed. Simulation results show that...
In this paper, a procedure based on three-dimension matrices is presented: it is the generalization of multiconductor cell analysis to any transmission line where the positions of all the active and passive conductors may change with continuity along their development. A meaningful example of this is given by three-core single lead-screened armoured cables where cores and armour wires are wound helically...
The continuously growing electrical power demand is more and more faced by the increase of generation from renewable energy sources. Given the uneven distribution of those resources in the power system, an increase in the transmission lines current rating (also called ampacity) is expected in the next future, to avoid the formation of bottlenecks. Given the difficulties in building new lines, due...
Global warming, also referred to as climate change, is the observed century-scale rise in the average temperature of the Earth and its related effects. Many scientific studies show that the climate system is warming. In 2013, the Fifth Assessment Report issued by the Intergovernmental Panel on Climate Change (IPCC) concluded that “It is extremely likely that human influence has been the dominant cause...
Implementation of millimeter-wave passive components on low-resistivity silicon using narrow and thin film structures is discussed in this paper. Dielectric narrow films in the order of a few tens of micron thick and with lateral dimensions similar or smaller than the top signal trace are implemented on silicon wafer by a simple but innovative microfabrication approach to significantly improve performance...
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