This paper reviews the fundamentals and latest progress of modeling, analysis, and design technologies for signal integrity and electromagnetic compatibility on PCB and package in the past decades. Most results in this field are based on the very rich and highly educational literature produced by Prof. C. Paul in his long scientific career. The inclusion of parameters variability effects is also considered, and it is demonstrated how statistical simulations can become affordable by means of recently-introduced stochastic methods. Finally, the necessity of practical training of designers is mentioned, and an experience relying on realistic PCB demonstrators is illustrated.

Overview of Signal Integrity and EMC Design Technologies on PCB: Fundamentals and Latest Progress

Among many microstrip configurations, the open-circuited shunt stub is probably the most common and versatile one. It is capable of performing a wide range of functions. Despite extensive studies and applications of the open-circuited shunt stub, comparatively little is known about aperiodic stubs on a microstrip line. In this paper, aperiodic stubs on a microstrip line are exploited to implement a high-performance low-pass filter and a joint design of the artificial transmission line and low-pass filter. The experimental results validate the performance of the proposed circuits. For the low-pass filter application, the proposed circuit outperforms a seventh-order Butterworth filter while their circuit sizes are comparable. For the joint design, it may potentially enhance the degree of integration in RF and microwave systems.

Design of Artificial Transmission Line and Low-Pass Filter Based on Aperiodic Stubs on a Microstrip Line

Electromagnetic interference (EMI) couplings between a motor drive and an adjacent communication network induce a considerable common-mode (CM) current in a communication cable, which has a serious impact on the performance of the communication network. In order to estimate the CM current, it is necessary to study the coupling mechanism between the motor drive and the communication network. In this paper, a commercial motor drive system with an RS485 communication circuit is used for analysis. The conducted and near-field coupling paths are analyzed and modeled. By integrating the models of coupling paths with the EMI models of the motor drive and the dc/dc converter, an estimation model of the CM current coupled to the communication cable is built. Furthermore, online measurement methods and numerical simulation are presented to extract the impedance parameters of the conducted and near-field coupling paths. The estimation model is validated by comparing the simulated currents with the measured currents in the two configurations. This model is applicable for estimating the CM current coupled to the communication cable in various configurations.

Estimation of Common-Mode Current Coupled to the Communication Cable in a Motor Drive System

In this paper, a bended differential transmission line using the asymmetric coupled line (ACL) with surface mount device (SMD) capacitor is proposed to suppress the common-mode noise. The bended differential transmission line using the ACL with SMD capacitor can greatly reduce the mode conversion from ${-}{6.91}$ to ${-}{13.29}~{\rm dB}$ and the Time-Domain-Through common-mode noise from 0.063 to 0.023 V as compared with the bended differential transmission line using the right-angle bend. Also, the differential-mode transmission is increased and the small differential-mode reflection is maintained. To verify the simulation results, measurement is done in the frequency and time domains where the measurement results are in good agreement with the simulation results.

Common-Mode Noise Reduction Using Asymmetric Coupled Line With SMD Capacitor

A new method is proposed to suppress the differential-to-common mode conversion of bend discontinuity for differential signaling. Slow-wave sections are utilized for the inner line to compensate the length difference from the outer one. By properly selecting the geometry, a significant reduction of 87.5% can be achieved for the time-domain differential-to-common mode transmission response while the magnitudes of differential-mode and differential-to-common mode reflections are kept small. The differential-mode transmission is improved by 4 dB at 10 GHz. The method has been demonstrated by the simulated and measured results of the fabricated prototype.

http://ieeexplore.ieee.org/iel7/6462538/6469379/06469381.pdf

Slow-wave structure to suppress differential-to-common mode conversion for bend discontinuity of differential signaling

In this paper, a bended differential transmission line using a compensation inductance is proposed to efficiently suppress the common-mode noise. The bended differential transmission line using the compensation inductance can then be implemented by the bended differential transmission line using the short-circuited coupled line. It has been shown that the bended differential transmission line using the short-circuited coupled line can greatly reduce the mode conversion from -5.47 to -14.75 dB, and the time-domain-through common-mode noise from 0.068 to 0.02 V as compared with the bended differential transmission line using the right-angle bend. In order to verify the simulation results, measurement is done in the frequency and time domains where the measurement results are in good agreement with the simulation results.

Bended Differential Transmission Line Using Compensation Inductance for Common-Mode Noise Suppression

In this paper, a bended differential transmission line using the balanced model is proposed to efficiently reduce the common-mode noise. The bended differential transmission line using the balanced model can greatly reduce the mode conversion from ™5.47 dB to ™14.86 dB and the TDT common-mode noise from 0.068 V to 0.023 V as compared with the bended differential transmission line using the right-angle bend. In order to verify the simulation results, measurement is done in the frequency and time domains where the measurement results are in good agreement with the simulation results.

Bended differential transmission line using balanced model for common-mode noise suppression

In this paper, a bended differential transmission line using a short-circuited coupled line is proposed to efficiently suppress the common-mode noise. It has been shown that the bended differential transmission line using the short-circuited coupled line can greatly reduce the mode conversion from −5.47 dB to −14.75 dB and the TDT common-mode noise from 0.068 V to 0.02 V as compared with the bended differential transmission line using the right-angle bend. In order to verify the simulation results, measurement is done in the frequency and time domains where the measurement results are in good agreement with the simulation results.

Bended differential transmission line using short-circuited coupled line for common-mode noise suppression

In this paper, a bended differential transmission line using the compensation inductance and capacitance is proposed. The bended differential transmission line using the compensation inductance and capacitance can greatly reduce the TDT common-mode noise from 0.056 V to 0.019 V as compared with the bended differential transmission line using the right-angle bend. In order to verify the simulation results, measurement is done in the time domain where the measurement results are in good agreement with the simulation results.

Chia-Han Chang

Papers

Bended Differential Transmission Line Using Compensation Inductance for Common-Mode Noise Suppression

Common-Mode Noise Reduction Using Asymmetric Coupled Line With SMD Capacitor

Bended differential transmission line using balanced model for common-mode noise suppression

Bended differential transmission line using short-circuited coupled line for common-mode noise suppression

Bended differential transmission line using compensation inductance and capacitance