ESE – Andrew Rusek
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Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1) PowerPoint PPT Presentation


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ESE – Andrew Rusek. Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1). P8 . Field Pattern of Three Radiating Objects (0.6 GHz) All Sources in Phase. Field Pattern of Three Radiating Objects (1.0 GHz)

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Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1)

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Applications of computer modeling in electromagnetic compatibility emc tests part1

ESE – Andrew Rusek

Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1)

P8. Field Pattern of Three Radiating Objects

(0.6 GHz) All Sources in Phase

Field Pattern of Three Radiating Objects (1.0 GHz)

All Sources in Phase

P7. Example 2: Simulated EMC Radiation Test for Three Radiating Objects

Field Directivity Tests for 0.6 GHz, 1.0 GHz, and 1.5 GHz

Test Antenna

Radiating Objects

Field Pattern of Three Radiating Objects (1.5 GHz)

All Sources in Phase

Current Distribution in Various Segments of Test Antenna

Versus Frequency. All Sources in Phase

changes of current magnitude show effects

of directivity variations with frequency

P10. Two Cell Phone Antennas, Field Directivity

for 0.8 GHz, Opposite Phases

Two Cell Phone Antennas, Field Directivity

for 0.8 GHz, The Same Phases

P9. Example 3: Two Cell Phone Antennas and Two Receiving Objects

Suspended Object

Cell Phone Antennas

Receiving Objects

Two Cell Phone Antennas

Field Directivity Changes for 1.5 GHz, Opposite Phases

Two Cell Phone Antennas, Field Directivity Changes

for 1.5 GHz, The Same Phases

Grounded Object

The Same Phases

P11. Opposite Phases

Grounded Object

Grounded Object

Summary:

EMC measurements are performed to protect electrical equipment from potential interfering signals

caused by uncontrolled and intentional sources. The presentation includes examples of simulated

basic Controller Area Network (CAN) experiments, including conducted and radiated emissions.

Simulated CAN immunity tests are also shown. In addition, results of computer simulations

of EM fields generated by GHz frequency basic structures are presented. Necessity of testing

GHz devices is due to high speeds of clocks of computers and signals of new cell phones.

At GHz frequencies the distribution of EM fields emitted by Devices Under Test (DUT) become

non-uniform. Computer simulation of experiments can be the way to reduce time required to find

the DUT field directivity.


Applications of computer modeling in electromagnetic compatibility emc tests part1

ESE – Andrew Rusek

Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part2)

P2. Example 1: Transceiver Modeling

P1. New Electromagnetic Interference Issues Investigated at OU:

GHz frequency range interference and radiating device

directivity (necessity of introduction of new EMC standards and measurement methods to

recognize device directivity)

Simulations helpful to detect peaks of radiation, and prepare experimentation and training

Cell phone and other wireless device interference into sensitive medical and automotive systems (Hospitals, Automobiles, etc)

GPS and other navigation instrumentation EMC problems

PRESENTED: Examples of Modeling

Example 1: CISPR (EMC Standards) based conducted and radiated emissions tests;

Immunity tests. Controller Area Network (CAN) transceivers are tested

(Research completed in cooperation with DaimlerChrysler)

Example 2: Simulated GHz range EMC radiation test for three radiating objects to observe

field directivity effects

Example 3: Example 3: Two Cell Phone Antennas and Two Receiving Objects

Model of CAN Transceiver with External Components

Mid-Layer Model of CAN Transceiver

Common-Mode Filter Structure

P3.

P4. Conducted and Radiated Emission Test

CAN Transceiver

Transmitting Pulses

CAN Receiver

Receiving Pulses

Internal Transmitter Model

Twisted Pair Cable

Antenna Model for CISPR 25 Radiated Emission Tests

Developed by Mr. W. Hall, DaimlerChrysler

Internal Receiver Model

P6. Simulated Immunity Tests

P5.

Measured Conducted Emissions

Max. freq = 5 MHz

Simulated Conducted Emissions

Interference

Generator

Measured Conducted Emissions

MHz

Interfering Signals

Simulated Radiated Emissions

Measured Conducted Emissions

Max. freq. = 50 MHz

Transmitted

Signal

Received

Signal

Interrupted Communication

OK signals


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