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Article: Amplifier considerations for the new IEC 61000-4-3.(EMC TEST)
- Article from:
- EE-Evaluation Engineering
- Article date:
- September 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Nelson Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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The third edition of IEC 61000-4-3, published in 2006, has mandated changes in some key areas that may require the replacement of your radiated immunity test amplifier. Along with extending the test frequency range to 6 GHz and better defining the calibration of the uniform field, the standard requires verification of the power amplifier linearity and output harmonics. As a result, some existing systems may fail to meet the new requirements because the amplifier in use is being run near saturation, and consequently, the modulated field is distorted.
[FIGURE 1 OMITTED]
Amplifier Linearity
A linear relationship exists between the input power and ...