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A common-mode radiation problem induced by cable-attached structure will be discussed and simulated. We will focus on how a cable-attached structure radiates, and how its victim, a Wi-Fi antenna, is affected. Mechanism of common-mode radiation will be showed, and verified by simulated results. Also, a solution using a common-mode filter (CMF) will be proposed, and it will largely suppressed the common-mode...
System-level ESD test is conducted into laptop using three different ESD generators. It is observed there is a large variation in ESD test result even if the same ESD generator is used. The current waveform from the ESD generator is a unique individual characteristic varies depending on ESD gun manufacturers and it can result in a different ESD test result. The effect of the current waveform is analyzed...
A method on developing pre-layout PDN model utilizing 3D full-wave simulation was proposed in this work. The proposed method divides the PDN into different blocks and obtains the network parameters of each block using 3D full-wave simulation. The proposed method was validated with post-layout simulation. Results show that PDN impedance obtained from pre-layout PDN model developed using proposed method...
A general circuit model for the field-wire coupling effect of electrically small irregular wire structures of various geometries is proposed in this paper. The formulas for the circuit elements are presented in analytical form and the limitations are discussed in detail. Finally, the model is validated on three typical cases by comparing the coupling currents on the terminal load with the counterpart...
A traveling wave circular loop antenna (CLA) model was demonstrated to generate the OAM carrying wave. Three different structures of the antennas based on this model are proposed to verify the generation of OAM waves, and its features are discussed.
An improved hybrid leapfrog ADI-FDTD method is developed for accurately characterizing complex electromagnetic environment effects (E3) on a warship with multi-wire antennas in this paper. It has the capabilities for fast extracting mutual couplings (S-parameters) among different wire antennas as well as capturing induced current and electric field distributions on such an electrically large platform...
High conductive fiber reinforced composite materials are widely used in several industry applications due to the excellent mechanical properties and good performance of shielding effectiveness. In this paper, equivalent modeling of a dielectric matrix filled in with a square array of long conductive fibers is considered. A modified homogenization model is presented by taking the skin effect into account...
This paper presents an analysis of the filtering characteristic for a coplanar symmetrical meander lines structure. The effects of geometrical parameters, which are length of vertical and horizontal elements as well as the distance of the gap between two symmetrical lines, on the filtering property of the structure are discussed. A novel direct derivation of the filtering performance of the coplanar...
This paper analyzes and compares the frequency responses of both Cu based interconnect and heterogeneous interconnect which consists of graphene sheets and Cu. By using partial element equivalent circuit (PEEC) method, the equivalent electric parameters of these two kinds of interconnects are obtained. A driver-interconnect-load (DIL) model and an equivalent single conductor (ESC) circuit are utilized...
The near future 5G wireless/mobile communication systems may adopt 60-GHz millimeter waveband as one of main operating frequencies for its advantages of higher achievable transmission rate and wider available bandwidth, when compared with ones for 4G/3G/2G communication systems. In this paper, a novel structure design of microstrip antenna array working at the central frequency of 60-GHz waveband...
This paper presents the investigation of the low frequency noise interference in the injection locked frequency divider (ILFD). A ring oscillator based ILFD with noise injection is applied for analysis. The ILFD's performance is studied in two circumstances, namely, when the ILFD is not injection locked, the noise effects lead to frequency modulation (FM), and the hybrid effect is observed when both...
A hybrid plasmonic parallel transmission line scheme constructed by a spatial single-mode with time-domain multi-line waveguide is presented in this paper. The proposed configuration enables a nanometer field localization with zero crosstalk between data channels. Furthermore, the proposed plasmonic transmission line shows the advantages of enabling an integrated circuits (IC) with a large number...
In this paper, a flexible Yagi-Uda antenna with polyimide substrate for wireless body area network (WBAN) is proposed. The prototype covers 2.45GHz Industrial, Scientific and Medical (ISM) band. The effects of bending along x-axis and y-axis for flexible Yagi-Uda antenna is analyzed. The resonant frequency, bandwidth and radiation patterns are simulated with various bending conditions. Results indicate...
Conformal FDTD method is developed for simulating an electromagnetic pulse (EMP) with multiple wedge structures made of PEC, dielectric, and even PEC and dielectric composites, respectively, where the FDTD result agrees very well with that of the Method of Moments (MoM) and Physics Optics (PO). Numerical investigations are further carried out for capturing transient responses corresponding to scattering,...
Where errors, malfunctions or failures in digital systems could increase safety risks, Functional Safety standards and/or Product Liability laws/regulations might not be complied with. Electromagnetic (EM) disturbances can cause interference (EMI) with all digital processors, so must be taken into account for Functional Safety and/or Product Liability. However, it is impossible to do enough EM immunity...
A transparent broadband absorber consisting of two periodic graphene resistive patterns separated by dielectric layers is investigated in the paper. The proposed absorber achieves 95% absorption from 39.2 GHz to 200 GHz with 134% fractional bandwidth, due to the multiple resonances provided by periodic patterns and tunability of graphene surface conductivity. Furthermore, the absorber shows relatively...
In order to mitigate the hazards of arc fault occurring in neutral non-effective grounding system, two arc-suppression methods based on cascaded H-bridge converter were proposed. The converter in shunt in the distribution network produces a proper current to compensate for the fault current, which results in zero voltage between faulty phase and ground. The implementation of proposed methods is presented...
In this work, a behavioral model of tubular wave couplers (TWC), whose use was recently included into automotive Standards for immunity verification of wiring harnesses in the frequency range from 400 MHz to 3 GHz, was derived. The model is based on scattering parameter measurements with the TWC mounted onto the calibration structure provided by the manufacturer, and the spurious effects related to...
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