2007 ieee international symposium on electromagnetic compatibility

42EMC <strong>2007</strong> ADVANCE PROGRAMlent circuit model. Lumped capacitors and inductors are used as theparameters of the equivalent circuit model. I extracted the parameters byfitting the s-parameters of the equivalent circuit model to those of the3D full wave simulator. The frequency range of the proposed model is500 MHz to 3 GHz which is suitable for use with modern high speedapplications. The neural network approach is then introduced as thenovel behavioral modeling method of the board to FPC interfaces. Eachlength of the board to FPC interfaces are scalable parameters and used asthe training data of the neural network structures. The predictions of thes-parameters using the neural networks when arbitrary transition lengthis given are very good compared to the 3D full wave simulations, andthese results validate the neural network as the promising candidate forthe modern high-speed interconnects modeling techniques.The Solutions of LCD Panel (T-Con) EMI Noise for WirelessIntegrationSungkyu Lee, KEES; Jung-Man Lim, N/A; Ki-Seob Lee, N/A; Onsik Choi,N/A; Bae-Won Lee, N/A; Do-Wan Kim, N/A; Masashi Hayakawa, TheUniversity of Electro-Communications; and Yoshio Kami, The University ofElectro-CommunicationsElectromagnetic interference (EMI) noise from a liquid crystal display(LCD) panel reduces the performance of wireless network systemsin a notebook, including two Wireless network cards: WirelessLocal Area Network (WLAN) card and Wireless Wide Area Network(WWAN) card. One of the main EMI noise sources for the wirelessnetwork system in an LCD panel is the timing controller (T-Con) IC.This paper introduces an approach to solve the problems of the EMInoise in the T-Con of an LCD panel, and a method of measuring theEMI noise of the T-Con itself by the use of the TEM-cell. Secondly,the solutions from the TEM cell tests, signal analyses and other measurements,suggest that there is a reduction in the EMI noise level ofthe T-Con. Finally, the measurement results of the EMI noise levelof the LCD panel, with the improved T-Con, are presented. Becausethe EMI noise problem becomes more and more important issues forwireless network systems, the solutions to the problem and the rightproposals have to be studied. We suggested them in this paper.Comparative Analysis of Intel Pentium 4 and IEEE/EMC TC-9/ACEM CUP Heat SinksJunwei Lu; and Xiao Duan, — Griffith UniversityThis paper presents finite element frequency domain results for electromagneticradiation emitted from high power microelectronic circuitsconnected to a heat sink. The heat sink model associated with one of theIEEE EMC TC-9 challenge problems, 2000-4 CUP heat sink, has beenused to investigate different grounding configurations. A new simulationmodel for the Intel P4 CPU heat sink is proposed. In contrast to the2000-4 EMC challenge model, the Intel P4 CPU heat sink model exhibiteddifferent results. A resonant frequency of 2.6 GHz with a reflectioncoefficient of 8.3 dB was found for the Intel P4 CPU heat sink, which isclose to the operating frequency of 2.4 GHz for IEEE and Bluetooth wirelesscommunication systems. The comparison of frequency sweepingresults shows that the reflection coefficient was found to be -6 dB at 3.6GHz and -20 dB at 3.4 GHz from the conventional CUP heat sink. TheCPU heat sink can perform as an efficient radiator at these frequencies.Chip Level EMI Approach for LCD TV PanelsDowan Kim, Samsung ElectronicsIn this paper, chip level approach is accomplished for solving EMIproblems of LCD TV panels. All the EMI noises from 30 MHz to 1GHz are classified into three noise groups by their sources, that is,the IC blocks generating the signals. Then, IC level solution isapplied in order to reduce the noises and it is proved that thisapproach is more powerful and essential than the traditional countermeasuressuch as gasket tape or shielding method. Finally, thismethod is applied to a real LCD module and it is verified that theproposed method will have excellent effects on eliminating EMItroubles from LCD TV panels.A Study on the Reduction Method of the Magnetic FieldRadiated from a PCB Including Multi-Loops (n=2)Atsuo Mutoh, Tokyo Fuji University; Shuichi Nitta, Salesian Polytechnic;and Yuxin Yan, Tokyo University of Agriculture & TechnologyThe near magnetic field radiated from a printed circuit board (PCB)including two multi-loops is studied in this paper. It is found that themagnetic field radiated from the PCB can be reduced by means of theparts layout making the current direction flowing through Vcc-GNDpins of the adjacent IC to be opposite, based on the following phenomena:1) the total amounts of near magnetic field cannot always beobtained from the addition of each near magnetic field from a singlesub-circuit; and 2) Digital ICs can be characterized by the currentmodel flowing from the Vcc pin to GND pin of the digital IC.POSTER SESSION 03: EM MEASUREMENTSLow Cost Noise SourcesLukas Vojtech, Czech Technical University in PragueEMC Measurements are a classic and necessary condition of device testingprocedures. In the case of testing power EMI filters or device immunity,we need simulators of the interfering signal. We are teaching the mainprinciples of EMC in our department. Practical measurements for studentsare realized in the EMC laboratory. For continual interference testing, studentshave an older, but still working, interference simulator; but they needan another one. This paper presents a few types of low cost broadband noisesources. Designed and practical working models could be helpful foreverybody who needs to assemble cheap, but good working devices.A Low Cost Line Impedance Stabilization Network for EMCLaboratory InstitutionVuttipon Tarateeraseth, Srinakharinwirot University; Werachet Khanngern;and Damrong Sakulhirirak, — King Mongkut’s Institute ofTechnology Ladkrabang, ThailandThis paper proposes how to analyze and design the Line ImpedanceStabilization Network (LISN). Details of the component characteristicsare described, along with the design of the air coil inductors in singleand multi layers based on a high, self resonant, frequency responseconcept. According to the CISPR 16-1 standard, the stabilized impedanceof 50 for the LISN at the frequency range 150 kHz to 30 MHz isproved by simulation and experimental results. The proposed LISN isa successful low cost design in comparison with a commercial LISN.Finally, the performance of the proposed LISN is achieved compared tothe CISPR standard and also with a commercial LISN.3-D Radiated Spurious Emission Test SystemLin Guo, Ministry of Information IndustryWith the rapid advent of the wireless technologies, wideband high frequencywireless systems are becoming more popular. These productsbring a new challenge to the EMC compliance testing, especially forthe radiated spurious emission test. The traditional 2D test method ofthe spurious emission is no longer suitable for the high frequency technologiescertification test. A new radiated spurious emission test systemis being studied in this paper, which is more suitable for the higherdirective radiated emission measurements. The use of this test©<strong>2007</strong> IEEE www.emc<strong>2007</strong>.org