Yinchao Chen

• 硕士
• China University of Geosciences

A wearable dual-band and dual-circularly polarized (DBDCP) antenna using a dodecagonal truncate pyramid-shaped artificial magnetic conductor (AMC) reflector for gain enhancement is proposed in this paper. Firstly, a compact deformed quadruple inverted-F antenna (QIFA) with meander-line-shaped radiation patches has been developed as the radiator. Th...

An innovative artificial magnetic conductor (AMC)-backed quad-band antenna is proposed with gain enhancement, high out-of-band (OoB) rejection, forward radiation improvement, and backward radiation reduction for intelligent Internet of Vehicle (IIoV)-based sensing and communication. It includes a quad-band microstrip radiator and a tetracyclic nest...

A gain-enhanced wideband multiple-input multiple-output (MIMO) antenna with dual polarization and high isolation is proposed for microbase station application. It includes two mutually orthogonal bowtie dipole radiators, four bowtie parasitic elements with the switch function of ON-/OFF-state, four vertical stubs, and a cavity, which are fed by a p...

In this paper, a novel planar active artificial magnetic conductor (AAMC) frequency-reconfigurable antenna printed on an FR4 substrate is proposed. Its AAMC metal pattern in a unit cell consists of a compound-five-ring nesting (CFRN) structure. It is loaded with only one varactor diode connected to the ground plane by a metallic via. In comparison...

In this paper, a novel super-wideband multiple-input multiple-output (SWB-MIMO) antenna system with high isolation has been proposed, each antenna element consisting of a spade-shaped radiation patch, a defected ground structure (DGS) as well as a windmill-shaped decoupling structure. The elliptical slot etched on the radiation patch and the rectan...

In this paper, a multi-band AMC-backed antenna system characterized with high gain and low-profile is proposed. It is constructed by placing a quad-band coplanar-waveguide (CPW) antenna over an AMC with four zero-phases in the reflection coefficient. The CPW antenna consists of an ornamentalpillar-shaped patch with the specially designed parasitic...

A compact tricyclic nested triband microstrip antenna is designed in this paper, which is composed of three metal rectangular rings, an input feed line, and an elliptic-shaped defected ground structure (DGS). To enhance the antenna's radiation performance, a novel artificial magnetic conductor (AMC) reflector characterized with three zero-phases in...

Here, a silicon‐substrate‐based four element antenna system is investigated by using a coplanar frequency selective surface (FSS) as a novel parallel reflector to improve radiation and transmission characteristics of the antennas. The four antennas are arranged around the square FSS, and one of the antennas is used as the transmitting element, whil...

A novel tricyclic nested electromagnetic bandgap (TN-EBG) structure has been proposed to restrain the simultaneous switching noise (SSN) in high-speed digital systems. The presented TN-EBG structure was fabricated and measured based on the simulated performance of the configuration. It is found that the measured S-parameters are in good agreement w...

This paper presents a simplified composite right/left-handed trans-mission-line (SCRLH-TL) unit-cell, which is primarily consisted of a rectangular ring with two grounded vias. Superposing this unit-cell onto a high–low–high step-impedance resonator (SIR) leads to a novel SCRLH-TL multiple-mode resonator (SCRLH-TL MMR). By combining the SCRLH-TL MM...

First, the chapter presents a novel design of electromagnetic bandgap (EBG) absorber with the characteristics of broad bandwidth, low profile, and polarization‐independence to a normal incident electromagnetic wave. The absorber is composed of three consecutive octagon or decagon loops, and highly‐resistive frequency selective surface (FSS) layers....

An asymmetric stepped-impedance ring resonator (ASIRR) is proposed for the design of a triple-bandpass filter. This resonator is applied to create the former two passbands by utilizing a stepped-impedance circular ring and the third passband by introducing two asymmetric coupling structures. It is found that the S-parameter performance can be impro...

Presented is a miniaturized microstrip dual-band bandpass filter (BPF). An asymmetric stepped impedance resonator (ASIR) is employed with a dumbbell-shaped notch. Compared with the conventional stepped impedance resonator (CSIR) and the multiple-mode resonator (MMR), the ASIR utilizes the first two modes to produce a wider lower passband, while the...

This paper presents the fundamental principle, circuit implementation, and measurement of wireless power transfer (WPT) technology through both Colpitts and Hartley oscillation prototype circuits. The Colpitts and Hartley oscillation prototypes are used to convert DC voltages into AC ones. Meanwhile, both half- and full-wave rectification circuits...

This letter demonstrates the feasibility of applying I/O pins as chip Tx/Rx antennas for implementing wireless inter/intra-chip communications (WIICs). An innovative printed circuit board (PCB) medium is presented as a signal propagation channel, which is specially bounded by a metamaterial electromagnetic wave absorber to improve electromagnetic e...

A design scheme is proposed for wireless interconnection communication between chips. The PCB medium channel is built with absorber layers. Two chip pin antennas are designed and simulated. Their scattering parameters are extracted and compared with three different cases. It evaluates the bit error rate (BER) performance via a interconnect communic...

A stepped-impedance circular ring resonator (SICRR) with two pairs of stubs is proposed for the design of a dual-bandpass filter. This quad-mode resonator is applied to produce two passbands. It is found that the centre frequencies and bandwidths of the two passbands can be tuned by varying the lengths of the stubs. Simulation results show that the...

A novel design of electromagnetic wave absorber is presented with the characteristics of broad bandwidth, low profile, and polarization independence to a normal incident electromagnetic wave. The absorber is composed of a single-layer, highly resistive frequency selective surface layer printed on a 1-mm-thickness foam substrate. It is observed that...

Wireless sensor networks have been widely studied for decades. There are many research areas that have been explored such as service availability and energy efficiency. Load balancing is one of the key techniques which can be used to solve the tradeoff between the both sides. In this paper, we propose a novel real-time load balancing technique whic...

In this paper, the system on chip (SOC) and system in package (SiP) are discussed as two main approaches for system integration. The system on package (SOP) is introduced with the discussion of the integrated passive device (IPD). IPD based on silicon with high resistance is investigated and the SOP using silicon-based IPD is analyzed. It is found...

This paper studies and analyzes the low noise amplifier applied for 2.4GHz RFID reader fused MGA-665P8. The design introduces low noise amplifier's circuit structure and the principle of work. In the circuit, the schematic simulation and co-simulation are offered to obtain the S parameter and noise figure and two types of results have a comparison....

Based on the IEEE 802.11a protocol , ADS software was used to simulate the OFDM signal wave and system spectrum ,data rate ranging from 6 to 54 Mbps. Then a 24Mpbs rate OFDM signal generator was designed based on the FPGA simulation ,and the simulation results were analyzed and compared . Xilinx Spartan-3E was selected as the FPGA platform and Veri...

Based on the design and improvement of traditional hairpin microstrip bandpass filter, a cross-hairpin bandpass filter is designed in this paper. The filter is used in WCDMA operating between 1920GHz and 1980GHz. This paper analyzes the filters consisting of two hairpin resonators of differential coupling structures and their 3D models are simulate...

Based on analyzing the characteristics of coupled microstrip lines, a design of RF microstrip bandpass filter for WLAN is studied. This paper presents on bandpass filter operating at center frequency of 5.5GHz with 1GHz bandwidth. The results of full-wave electromagnetic simulation indicate that the filter shows a very good performance with inserti...

A design of bow-tie dual-frequency microstrip antenna is proposed for L and S bands application. A single layer dual-frequency microstrip antenna is designed in this paper, which used bow-tie geometry with an approximate U-shaped slot embedded near the one of two radiation edges, and has the virtues of saving space and agility in construction. The...

In this paper, a systematic analysis of the integrated balun circuits based on the principle of transformers is presented. Firstly, the characteristics of an ideal transformer is discussed. Then, equivalent circuits for an actual balun are presented, where the standard and mixed-mode S-parameters for the baluns are derived. Finally, ADS simulation...

In this paper, a practical 50-100 Ω balun, based on the principle of transformers, was designed and fabricated, which was printed on the copper cladded FR4 PCB. First, a full wave model of the balun was designed using ADS; then, the fabricated structure was measured for the insertion loss, phase difference, and amplitude imbalance. It is found the...

In this paper, we show how statistical decision theory can be used to solve real life product problems. Global Positioning System (GPS) performance in a mobile handset degrades whenever it is simultaneously used with a 3G data or voice service. This degradation is due to the 3G transmitter interference. Mitigation methods to interference in GPS hav...

Co existence of Global Positioning System services (GPS) with cellular and other services and features in a mobile handset presents challenges to GPS performance. Particularly challenging is the over the air (OTA) interface to the GPS receiver that results from carriers like the Global System for Mobile (GSM) and Wideband Code Division Multiple Acc...

Vias can introduce impedance discontinuity, slow down signal edge rate, add jitter and reduce eye openings, and cause data misinterpretation by the receiver in high-speed channel. This paper presents the design and optimization of differential vias for high-speed serial ATA connection at the data rate of 6 Gb/s. First, differential vias on a specif...

High-speed data transmission can suffer significant degradation after the signal has passed through a long transmission path. Proper design of PCB differential transmission pairs is one of the most important steps in creating a reliable serial ATA link. Based on a typical Intel 8-layer stackup, a design of 100 Omega microstrip and stripline differe...

The speeds of computers need to increase. A limitation to increasing this speed is the layout design of printed circuit boards (PCB's). One of the critical limiting factors of the PCB is the orientation of differential capacitors with respect to one another. This paper determines the optimal orientation of these capacitors in order to reduce the re...

In this paper, we extend the mixed mode S-parameter representation and its properties for a differential network commonly used in integrated circuits and printed circuit boards (PCBs). As an example of a differential network circuit, we illustrate the analysis of a pair of differential traces printed on a PCB using Ansoft HFSS to simulate the S-par...

In this paper, we target to investigate the crosstalk between two adjacent traces by studying the effects of their spacing and orientation. It is found that the trace routing is a critical way to reduce the crosstalk between two traces designed in high-density integrated circuits. Simulation results show that two vertical traces result in the small...

This paper presents a systematic methodology to design a tunable inductor for potential applications of contactless couplers. The design applies the Ansoft software tool HFSS (High Frequency Structure Simulator) in conjunction with Microsoft Visual C++ programming to optimize an inductor's dimensions, e.g., number of trace turns, diameter of the wi...

Crosstalk is one of the greatest concerns in the design of integrated high-density circuits, especially in high frequency range, due to that it seriously leads to a wireless communication system deviating from its designed performance. In this paper, we analyze the frequency and time domain crosstalk effects between two traces as a function of thei...

In this letter, a novel ultra-wideband (UWB) bandpass filter with compact size and improved upper-stopband performance has been studied and implemented using multiple-mode resonator (MMR). The MMR is formed by attaching three pairs of circular impedance-stepped stubs in shunt to a high impedance microstrip line. By simply adjusting the radius of th...

The paper explores the properties of mixed-mode (MM) S-parameters, which are widely used in computer PCB and wireless RF industries and have not received serious discussion in the current literature. In this paper, to compare these MM S-parameter properties to the corresponding ones of the conventional single-ended S-parameters, we have developed t...

In this paper, we propose the lumped equivalent circuit models for the distributed coupled line directional and branch line directional couplers. Firstly, we have developed the conversion topologies from distributed microwave circuits to the lumped element circuits. Secondly, as applications of the proposed topologies, we have generated two 3 dB lu...

The paper targets to explore the properties of the mixed-mode S-parameters, which are widely used in the computer PCB and wireless RF industries and have not received serious discussion in the currently published literature. In this paper, in order to compare these properties with the corresponding ones defined in the conventional single-ended S-pa...

In this work, we apply a virtual-focus scanning method to detect a tumor inside a simplified two-dimensional breast model via the finite difference time domain method. For the purpose of simplification, we construct a microwave detection system with an N-element infinitesimal dipole array, and excite the central element of the array while letting a...

In this paper, we explore algorithms for an evaluation of the space transformation factor (STF) in the application of the transformed-space nonuniform pseudo-spectral time-domain (TSNU-PSTD) scheme. We apply these algorithms to both typical propagation problems and scattering analyses. Before implementing the PSTD technique, we first transform nonu...

In this paper, we apply a biorthogonal multiresolution time domain (MRTD) scheme based on the Cohen-Daubechies-Feauveau (CDF) scaling functions for vehicle communication applications. We create a car model using a model based on a 1995 Ford Contour Sedan and simulate the field distribution inside of the car model under the frequency of blue tooth.

This article presents study of a dual-band integrated-circuit package antenna (ICPA), which operates concurrently on dual bands at 2.4 and 5.25 GHz. The antenna is designed and printed on the top surface of an IC package and fed by a single coaxial line, while the transceiver is implemented on the opposite side of the package, through the separatio...

In this paper, various planar printed microwave bandpass filters (BPFs) are designed and analyzed by applying a nonuniform finite-difference time-domain (NU-FDTD) method. These filters, referred to as integrated-circuit package filters (ICPFs), are designed in such a way that they operate in dual mode (DM), that is, at TM and TM, to ensure a good e...

Purpose To study the photonic band‐gap (PBG) characteristics constructed by periodic conducting vias on various guided transmission‐line structures. Design/methodology/approach The finite difference time domain (FDTD) method is adopted to analyze various PBG via structures. Conventionally, PBG characteristics on guided‐wave structures, such as mic...

In this paper, we compare the different versions of multiresolution time-domain (MRTD) approaches based on the cubic-spline Battle–Lemarie scaling and high-level multiresolution wavelet functions, Haar scaling functions, and Cohen–Daubechies–Feauveau (CDF) scaling functions. First, by analyzing a TEM wave propagating along a specified direction, we...

Purpose To demonstrate the flexibility and advantages of a non‐uniform pseudo‐spectral time domain (nu‐PSTD) method through studies of the wave propagation characteristics on photonic band‐gap (PBG) structures in stratified medium Design/methodology/approach A nu‐PSTD method is proposed in solving the Maxwell's equations numerically. It expands th...

An on-package dual-mode square-loop band pass filter is studied by applying a non-uniform finite difference time domain (NU-FDTD) method. The filter is integrated on a package containing a transceiver, and it is designed to operate in dual-modes, i.e., TM 100 z and TM 010 z, to ensure a good electric performance around the center frequency at 5.25...

There are two major challenging issues encountered in using the conventional finite-difference time-domain (FDTD) methods for solving electromagnetic field problems, namely, reducing the errors introduced by the staircasing approximation used to model objects with curved surfaces, and the dispersion effects when the number of cells per wavelength i...

We begin by reviewing the foundation of the MRTD scheme—the multiresolution analysis (MRA ), and then exploring the properties of the scaling functions and wavelets. Also, we demonstrate the applications of the MRTD technique by analyzing a transverse electromagnetic (TEM ) wave propagation in a dielectric layered stratified space and an integrated...

We begin by reviewing the foundation of the MRTD scheme—the multiresolution analysis (MRA ), and then exploring the properties of the scaling functions and wavelets. Also, we demonstrate the applications of the MRTD technique by analyzing a transverse electromagnetic (TEM ) wave propagation in a dielectric layered stratified space and an integrated...

First Page of the Article

In this paper, various planar printed microwave and photonic band-gap (PBG) filters have been designed and analyzed by applying the finite difference time domain method, together with an unsplit-anisotropic perfectly matched layer technique as treatments of boundary conditions. The implemented solver was first validated by comparing the computed da...

One of the current topics in computational electromagnetics is the study of electromagnetic band-gap (EBG) structures using planar printed transmission lines. In fact, structures using microstrip-line circuits have been comprehensively applied in recent years. However, studies involving transmission lines using the coplanar waveguide (CPW) have not...

In this paper, a number of photonic band-gap (PBG) structures, which are formed by periodic circuit elements printed on transmission-line circuits, are studied by using a well-known numerical method, the finite-difference time-domain (FDTD) method. The results validate the band-stop filter behavior of these structures, and the computed results gene...

Although the multiresolution time-domain (MRTD) scheme has excellent potential as a Maxwell solver, the numerical implementation of the time updating in this scheme in a region near an inhomogenous material interface, as well as the incorporation of boundary truncation on the shielded structure, is quite involved and prevents the extensive applicat...

In this work, we extend the transformed-space, non-uniform pseudo-spectral time domain (TSNU-PSTD) Maxwell solver for a 2D scattering analysis. Prior to implementing the PSTD in this analysis, we first transform the non-uniform grids {xi} and {yj} sampled in the real space for describing complex geometries to uniform ones {ui} and {vj}, in order to...

Horns and reflector antennas, which are bodies of revolution (BORs), find widespread use in the areas of communication and radar systems. In this work, we present a highly efficient, BOR finite-difference time-domain (BOR/FDTD) technique for the analysis of these antennas. This approach allows us to employ a 2D finite-difference lattice that projec...

We apply an anisotropic perfectly matched layer (APML) absorber for open boundary truncation in implementation of the multiresolution time domain (MRTD) scheme. We develop an APML update algorithm to handle a general APML region in the MRTD formulations with the content of the leapfrog algorithm applied in the conventional finite-difference time-do...

In this paper, a higher-order alternative-direction-implicit (ADI) finite-difference time-domain (FDTD) method is presented. The dispersion analysis is performed and the results are compared with those derived from the regular ADI-FDTD method. Based on the dispersion analysis, a guideline for choosing an appropriate time step in the ADI-FDTD implem...

A second-order in time and fourth-order in space alternative direction implicit (ADI) finite difference time domain (FD-TD) method has been developed. The dispersion relation is derived and compared with the ADI-FDTD method. Numerical results demonstrated that the higher-order ADI-FDTD has a better accuracy compared to the ADI-FDTD method.

This research applies an efficient two-dimensional cylindrical finite-difference–time-domain (2D-CFDTD) algorithm implemented on the transverse plane of a guided-wave structure to analyze a photonic crystal fiber (PCF) structure. An unsplit anisotropic perfectly matched layer (APML) is used for mesh termination along the radial direction of the PCF...

In this paper, we analyse scattering parameters for a sandwiched-type coplanar waveguide (SCPW) with three pairs of vias that are adjacent to each other. The above structure is frequently encountered in printed circuit board (PCB) designs, and is analysed by using a non-uniform finite difference time domain (FDTD) algorithm on an auto-adjustable me...

In this paper, we apply a pseudospectral time domain (PSTD) algorithm for calculation of the radar cross section of three-dimensional scattering objects. For the purpose of exciting an incident wave without leading to unwanted Gibbs' phenomenon, we utilize an initial condition-excitation technique. Meanwhile, we adopt the pure scattered field formu...

This paper employs a hybrid method that combines the pseudo-spectral time-domain (PSTD) algorithm and the finite-difference–time-domain (FDTD) method to analyze the scattering problems involving fine structures. In principle, the PSTD is applied in a direction with low-density variation of structures but large computation volume, whereas the FDTD i...

This paper presents an adjustable multiple image technique (MIT) and an anisotropic perfectly matched layer (APML) employed in the context of multiresolution time-domain (MRTD) scheme for the truncation of the computational boundary, with the MIT used for perfect electrically conducting (PEC) shields and the APML for open structures. We begin by pr...

In this Letter a unified nonuniform cylindrical finite-difference–time-domain (NU-CFDTD) algorithm is utilized for the analysis and design of cylindrical millimeter-wave integrated circuits (CMICs). It is shown that the algorithm is efficient in coding and flexible in treating various materials and discontinuities without adding computational resou...

In this research, we apply an efficient two-dimensional cylindrical finite difference time domain (2D-CFDTD) algorithm to analyze a photonic crystal fiber (PCF) structure. An unsplit anisotropic perfectly matched layer (APML) is used for mesh termination along the radial direction of the photonic crystal fiber (PCF). The propagation characteristics...

In this research, a cylindrical, nonuniform finite difference time domain technique is developed for solving Maxwell's equations with body of revolution (BOR) geometries. The rotational symmetry of structures enables us to employ a two-dimensional (2D) finite difference lattice in the field timestepping procedure by projecting a three-dimensional (...

In this research, a generalized nonuniform finite difference time-domain (NU-FDTD) Maxwell's solver has been developed using a memory-saving technique, the MFC class templates. The dynamic sizing property of the MFC array classes is integrated to the solver such that there is more memory flexibility in handling complicated structures. The algorithm...

In this research, we develop a transformed-space, nonuniform pseudo-spectral time domain (TSNU-PSTD) Maxwell solver for modeling a simplified indoor wave propagation in a multilayer dielectric system for wireless local area network (WLAN) communications. Herein, we transform a nonuniform grid {x_i} to a uniform one {u_i} to fit...

In this research, a cylindrical, nonuniform finite difference time domain technique is developed for solving Maxwell's equations with body of revolution (BOR) geometries. The rotational symmetry of structures enables us to employ a two-dimensional (2D) finite difference lattice in the field timestepping procedure by projecting a three-dimensional (...

In this paper, we have made fundamental investigation on a generalized multiresolution time domain (MRTD) scheme on the basis of the cubic spline Battle?Lemarie scaling and high-level resolution wavelet function expansions for electromagnetic applications. Focusing on a one-dimensional electromagnetic plane wave propagation problem, we summarize ge...

We present a novel configuration of a U-shaped dual-frequency single feeding port planar inverted-F microstrip antenna for mobile communication applications in both the GSM and DCS 1800 systems operated at 0.9 and 1.8 GHz, respectively. Starting from an initial design derived from an empiric approximation and transmission line model for a standard...

We describe a stacked, dual-frequency microstrip planar inverted-F antenna (DF-PIFA) for mobile telephone handsets that can concurrently work in two frequency-bands, viz., those associated with the GSM and DCS 1800 systems operating at 0.9 GHz and 1.8 GHz, respectively. The proposed microstrip DF-PIFA is fed by a coaxial line, as opposed to two sep...

In this paper, a new nonuniform pseudospectral time-domain (NU–PSTD) method is presented for electromagnetic applications. In this method, we transform a nonuniform grid {xi} into a uniform one {ui} before applying the fast Fourier transform (FFT) to obtain the spatial derivatives. These transformed-space derivatives are then converted back to the...

In this paper, we present a hybrid scattering transfer function (STF) and finite-difference time-domain (FDTD) approach for the calculation of electromagnetic transient responses with the incidence of an extremely slow-decaying pulse, e.g., a double-exponential pulse. We first introduce a scattering transfer function (STF) into the scattering syste...

In this paper, we have developed a multiresolution time-domain (MRTD) scheme to analyze two-dimensional (2-D) scattering objects with comparison to the corresponding finite-difference time-domain (FDTD) method. We have applied an anisotropic perfectly matched layer (APML) absorber for open boundary truncation in the content of the MRTD scattering a...

An efficient non-uniform, orthogonal mesh generation algorithm was presented for the analysis and design of cylindrical microwave devices and integrated circuits using the cylindrical finite-difference time-domain methods. The total computational domain was divided into a number of subregions. All cells in each subregion were homogenous and contain...

This paper describes EM Wave Simulation, a windows-based animated electromagnetic wave simulation package, developed as a supplementary tool for teaching electromagnetic field theory at the undergraduate level. For the purpose of rapid display of electromagnetic wave images, the implemented algorithm assumes a structure sandwiched between two perfe...

In this paper, we present a hybrid algorithm that combines the finite-difference time-domain (FDTD) and finite-volume time-domain (FVTD) methods to analyze microwave integrated-circuit structures that may contain curved perfect electric conductor (PEC) surfaces. We employ the conventional nonuniform FDTD in regions where the objects are describable...

In this paper, the well known Finite Difference Time Domain (FDTD) algorithm is utilized to design and analyze a number of planar printed microwave integrated circuits (MICs). Such designs and analyses are based on a developed FDTD computer solver. Prior to the designs, the solver has been validated through comparisons of its computed results with...

A microstrip fed dual-frequency planar printed antenna (DF-PPA) is proposed. This antenna can operate in parallel at two distinct frequency bands that are commonly used in nowadays communication systems, viz., the GSM and DCS 1800, at the operating frequencies of 0.9 GHz and 1.8 GHz, respectively. To increase its compactness, the proposed antenna i...

This paper makes a comparison study by using both the pseudospectral time-domain (PSTD) and finite-difference time-domain (FDTD) methods for a two-dimensional (2-D) scattering analysis. The time-domain incident plane-wave pulse used in the PSTD technique is herewith simulated with an initial-condition excitation technique to eliminate the unwanted...

The traditional approach of implementing FDTD techniques is to develop different sets of update relations that accommodate for different computational regions, for example, normal FDTD and absorbing boundary condition (ABC) regions. In particular, when a perfectly matched layer (PML) is used for termination of computational grids, we have to deal w...

We present a systematic and memory-saving algorithm to formulate a scaling function based multiresolution time domain (S-MRTD) scheme for electromagnetic applications. The algorithm retains simplicity of time domain leapfrog feature, employs a systematic image technique to truncate PEC or PMC boundaries, and requires only a little computation space...

A new numerical method, the pseudospectral time domain (PSTD) algorithm with an infinite order of accuracy and high efficiency, is used to obtain the RCS of a three-dimensional object. In implementation of the PSTD, the incident plane wave pulse is simulated with an initial-condition excitation technique based on a pair of one-dimensional PSTD upda...

This paper aims at presenting a unified nonuniform cylindrical finite-difference time-domain (NU–CFDTD) algorithm for the analysis of generalized cylindrical electromagnetic problems, which requires no need for splitting a computational volume into the FDTD and absorbing boundary regions. The algorithm is designed to be easy for coding and flexible...

We have applied an anisotropic perfectly matched layer (APML) type of absorber for mesh truncation in the context of a three-dimensional multiresolution time domain (MRTD) scheme. We have developed a generalized APML update algorithm to handle the faces, edges and corners of the APML regions in the MRTD formulation that retains the philosophy of th...

In this paper, we present a highly efficient one-dimensional cylindrical nonuniform finite-difference time-domain (1-D CNUFDTD) method, which utilizes the unsplit anisotropic perfectly matched layer (APML) for mesh truncation along the radial direction to analyze axisymmetric optical-fiber waveguides. As a first step, we validate the proposed FDTD...

In this paper, we apply an efficient two-dimensional (2-D) finite-difference time-domain (FDTD) algorithm to an analysis of uniform transmission fines printed on various anisotropic substrates. By investigating the transverse resonant properties of the structures, we obtain their propagation characteristics, as well as the field images at specified...

We have successfully implemented a one-dimensional non-uniform FDTD algorithm that utilizes an unsplit anisotropic perfectly matched layer, and have used it to analyze a number of representative optical fiber waveguides. The algorithm is highly-efficient computationally, as well as versatile enough to be useful for analyzing a large class of axisym...

Summary form only given. Many microwave devices and integrated circuit components, waveguides and absorbers employ anisotropic materials, and, to efficiently formulate boundary value problems associated with these structures, a number of different matrix representations to Maxwell's equations have been proposed in the literature. Most have only dea...