IEC 61000-4-21-2011 pdf free.Electromagnetic compatibility (EMC) – Part 4-21: Testing and measurement techniques – Reverberation chamber test methods.
The objective of this part is to establish a common reference for using reverberation chambers to evaluate the performance of electric and electronic equipment when subjected to radio-frequency electromagnetic fields and for determining the levels of radio-frequency radiation emitted from electric and electronic equipment.
NOTE Test methods are defined in this part for measuring the effect of electromagnetic radiation on equipment and the electromagnetic emissions from equipment concerned. The simulation and measurement of electromagnetic radiation is not adequate for quantitative determination of effects. The defined test methods are organized with the aim to establish adequate reproducibility and repeatability of test results and qualitative analysis of effects.
This part of IEC 61000 does not intend to specify the tests to be applied to a particular apparatus or system. Its main aim is to give a general basic reference to all concerned product committees of the IEC. The product committees should select emission limits and test methods in consultation with CISPR. The product committees remain responsible for the appropriate choice of the immunity tests and the immunity test limits to be applied to their equipment. Other methods, such as those covered in IEC 61000-4-3, CISPR 16-2-3 and CISPR 16-2-4 may be used.’
2 NormatIve references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050(161):1990, International Electrotechnical Vocabulary — Chapter 161:
Electromagnetic compatibility
Amendment 1 (1997)
Amendment 2 (1998)
IEC 60068-1, Environmental testing — Part 1: General and guidance
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2007)
CISPR 16-1-1, Specification for radio disturbance and immunity measuring apparatus and methods — Part 1-1: Radio disturbance and immunity measuring apparatus — Measuring apparatus
CISPR 16-2-3. Specification for radio disturbance and immunity measuring apparatus and methods — Part 2-3: Methods of measurement of disturbances and immunity — Radiated disturbance measurements
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions together with those in IEC 60050(161) apply.
3.11 antenna
that part of a radio transmitting or receiving system which is designed to provide the required coupling between a transmitter or a receiver and the medium in which the radio wave propagates
(IEC 60050-712:1992, 712-01-011
NOTE For the purpose of this pcocedure. antennas are assumed to have an efficiency of 75 % or greater.
3.1.2 electromagnetic wave EM wave
wave characterized by the propagation of a time-varying electromagnetic field and caused by acceleration of electric charges
[IEC 60050-705:1995, 705-01 -09, moditiedj
3.1.3 far field region
that region of the electromagnetic field of an antenna or unintentional radiator wherein the predominant components of the field are those which represent a propagation of energy and wherein the angular field distribution is essentially independent of the distance from the antenna.IEC 61000-4-21 pdf free download.