scholarly journals Development of Generic Radiating Model for Rectangular Capacitors: Magnetic Near Fields Analysis and Modeling

2021 ◽  
Author(s):  
Walid Labiedh ◽  
Bessem Zitouna ◽  
Mohamed Tlig ◽  
Jaleleddine Ben Hadj Slama
Keyword(s):  
Printed Circuit Board ◽  
Near Field ◽  
Optimization Method ◽  
Potential Interaction ◽  
Circuit Board ◽  
Equivalent Model ◽  
Generic Model ◽  
Model Parameters ◽  
Field Zone ◽  
Radiating Model

This chapter deals with modeling the radiation from rectangular film capacitors as a power electronics component. The rectangular film capacitors are sources of electromagnetic radiation, where its characterization is crucial for electronic circuits EMC. Our study presents the analyses and modeling of the magnetic near field radiated by the plastic and the polyester capacitors. An electromagnetic inverse method is combined with an optimization method based on genetic algorithms to create a radiating equivalent model. A very good agreement is observed between the magnetic near field cartography measured above the studied structure and calculated using the developed model parameters. Finally, a generic radiating model is proposed for various types of rectangular film capacitors. The generic model is validated using the measurements on a rectangular capacitor. The obtained equivalent model can calculate the magnetic field at any near field zone and far field around the capacitors. Circuit designers can use the field distribution to optimize the placement of the capacitors on the printed circuit board to reduce their coupling and potential interaction with other equipment in the vicinity of the system.

Analysis and Modeling of Film Capacitor Radiation Generic Radiating Model for the Rectangular Capacitors

2021 ◽  
Vol 36 (4) ◽  
pp. 425-434
Author(s):  
Walid Labiedh ◽  
Bessem Zitouna ◽  
Mohamed Tlig ◽  
Jaleleddine Slama
Keyword(s):  
Inverse Method ◽  
Printed Circuit Board ◽  
Near Field ◽  
Source Model ◽  
Circuit Board ◽  
Generic Model ◽  
Radiating Model ◽  
Em Field ◽  
The One ◽  
Good Agreement

Capacitors are sources of EM field emissions whose characterization is crucial for electronic circuits EMC. This paper presents the modeling of equivalent radiating sources of rectangular film capacitors. It presents and analyses the magnetic near field measured above plastic and polyester capacitors. The measurements are then used by the inverse method to create a radiating source model for the capacitor. The results show a good agreement between the measured cartography and the one obtained when using radiating sources model. Finally, a generic radiating model is proposed for various types of rectangular film capacitors. The generic model is validated using the measurements on a rectangular capacitor. The suggested radiating model accelerates solving the inverse method. It can be used by circuit designers to optimize the placement of capacitors on the printed circuit board to reduce their coupling with other components of the studied system.

scholarly journals Research on Anti-Radiation Noise Interference of High Definition Multimedia Interface Circuit Layout of a Laptop

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 426 ◽  
Author(s):  
Wei Chien ◽  
Yu-Ting Cheng ◽  
Chiuan-Fu Hsiao ◽  
Kai-Xu Han ◽  
Chien-Ching Chiu
Keyword(s):  
Electromagnetic Interference ◽  
Printed Circuit Board ◽  
Near Field ◽  
Circuit Board ◽  
High Definition ◽  
Interface Circuit ◽  
Noise Interference ◽  
Multimedia Interface ◽  
Pcb Layout ◽  
Detection Instrument

In this paper, several aspects were studied, including the effect of an electromagnetic interference (EMI) noise interference strategy with High Definition Multimedia Interface (HDMI) 1.4, the analysis of a test on a printed circuit board (PCB) layout, and a comparison of the near field intensity radiation distribution between an EMI with a modified HDMI layout and an original layout. In this study, the near field detection instrument of APREL EM-ISight was employed to analyze the distribution of the strength of an electromagnetic noise field. After the practical validation, we found that the PCB layout complies with the standards after the modifications. Meanwhile, the PCB layout satisfies the requirements of most laptop HDMI-related products for EMI.

Equivalent model of circular-type spiral inductor in printed circuit board

2012 ◽  
Vol 55 (2) ◽  
pp. 337-340 ◽  
Author(s):  
Tong-Ho Chung ◽  
Hee-Do Kang ◽  
Tae-Lim Song ◽  
Jong-Gwan Yook
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Equivalent Model ◽  
Spiral Inductor ◽  
Printed Circuit

scholarly journals Design and Study of a Wide-Band Printed Circuit Board Near-Field Probe

Electronics ◽  
2021 ◽  
Vol 10 (18) ◽  
pp. 2201 ◽  
Author(s):  
Pedro A. Martinez ◽  
Enrique A. Navarro ◽  
Jorge Victoria ◽  
Adrian Suarez ◽  
Jose Torres ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Interference ◽  
Printed Circuit Board ◽  
Transmission Loss ◽  
Near Field ◽  
Fem Simulation ◽  
Numerical Results ◽  
Circuit Board ◽  
Frequency Range ◽  
Printed Circuit

Magnetic near-field probes (NFP) represent a suitable tool to measure the magnetic field level from a small electromagnetic interference (EMI) source. This kind of antenna is useful as a magnetic field probe for pre-compliance EMC measurements or debugging tasks since the user can scan a printed circuit board (PCB) looking for locations with strong magnetic fields. When a strong H-field point is found, the designer should check the PCB layout and components placement in that area to detect if this could result in an EMI source. This contribution focuses on analyzing the performance of an easy to build and low-cost H-field NFP designed and manufactured using a standard PCB stack-up. Thereby, the frequency range and sensitivity of the NFP-PCB are analyzed through a Finite Element Method (FEM) simulation model that makes it possible to evaluate its sensibility and effective frequency range. The numerical results obtained with the FEM models are validated against measurements to verify the design and performance of our NFP. The FEM model reproduces the experimental procedure, which is used to evaluate the performance of the NFP in terms of sensitivity by means of the simulated near-field distribution. The NFP-PCB has almost a flat response from 180 MHz to 6 GHz, with an almost perfect concordance between numerical and experimental S21 results. The numerical results show an average transmission loss of −27.9 dB by considering the flat response bandwidth, whereas the experimental one is −29.7 dB. Finally, the designed NFP is compared to two high-quality commercial probes in order to analyze its performance.

Design of Antenna for UHF Near-Field RFID Reader

2012 ◽  
Vol 236-237 ◽  
pp. 889-891
Author(s):  
Zou Tao ◽  
Yong Zhong Zhu
Keyword(s):  
Radio Frequency Identification ◽  
Printed Circuit Board ◽  
Near Field ◽  
Impedance Matching ◽  
Magnetic Coupling ◽  
Circuit Board ◽  
Printed Circuit ◽  
Rfid Reader ◽  
Frequency Identification ◽  
Operating Bandwidth

A segmented loop antenna is presented for ultra-high frequency (UHF) near-field radio frequency identification (RFID) reader. The segmented antennas have been constructed that can operate at resonant diameters while still providing good magnetic coupling. The antenna printed on a FR4 printed circuit board (PCB) with an overall size of 170× 170 × 1 mm3 achieves good impedance matching and uniform magnetic field distribution over an operating bandwidth of 840–1120 MHz, which is desirable for UHF near-field RFID reader applications.

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