IEC PAS 62431:2005

1 Scope
2 Normative references
3 Terms, definitions and acronyms
   3.1 Terms and definitions
   3.2 Acronyms
4 Specimen
   4.1 Specimen specification
   4.2 Reference metal plate
   4.3 Reference specimen for calibration
5 Specimen holder
6 Measurement equipment
   6.1 Network analyser
   6.2 Antenna
   6.3 Amplifier
7 Measurement condition
   7.1 Temperature and environment
   7.2 Calibration temperature of measurement equipment
   7.3 Warming-up of measurement equipments
   7.4 Electromagnetic environment
   7.5 Calibration of measurement equipment
   7.6 Cable calibration
8 Calibration of measurement system and measurement
   conditions
   8.1 Calibration of measurement system
   8.2 Measurement conditions
9 Horn-antenna method
   9.1 Measurement system
   9.2 Measurement conditions
   9.3 Measurement procedures
10 Dielectric lens antenna method - Focused beam type -
   10.1 Outline
   10.2 Measurement system
   10.3 Measurement procedures
11 Dielectric lens method - Parallel beam method
   11.1 Principle
   11.2 Measurement system
   11.3 Specimen
   11.4 Measurement procedures
12 Test report
   12.1 Content
   12.2 Specimen
   12.3 Measurement data
   12.4 List of test equipment
   12.5 Unit
   12.6 Measurement method
   12.7 Measurement condition
Annex A (informative) Reflection and scattering from metal
                      plate - Horn antenna method
   A.1 Reflection characteristics
   A.2 Scattering characteristics theta = 0 degrees
Annex B (informative) Reflectivity of reference specimens
                      using the horn-antenna method
Annex C (Informative) Specifications of commercially available
                      antennas
   C.1 Horn antennas
   C.2 Antennas consisting of dielectric lens
Annex D (informative) Calibration using network analyzer
   D.1 Type of calibration
   D.2 Calibration procedures
Annex E (informative) Dynamic range and measurement errors
Annex F (informative) Enlargement of dynamic range - Calibration
                      by isolation
Annex G (informative) Example of method of calculation of
                      directional gain of horn antenna
Annex H (informative) Relative permittivity of Styrofoam and
                      foamed polyethylene based on foam ratio
Annex I (informative) Calculation of Fraunhofer region - Horn
                      antenna method
Annex J (informative) Electromagnetic field distribution near
                      the focus -
Annex K (informative) Time-domain and gating function of network
                      analyser
   K.1 Time domain
   K.2 Time resolution and aliasing
   K.3 Time resolution
   K.4 Maximum measurable range (aliasing-free range)
   K.5 Time gating and optimal gate limit
Annex L (informative) Specimen holder and antenna positioner
Annex M (informative) Example of design of dielectric lens
   M.1 Design of dielectric lens
   M.2 Design of antenna

specifies the measurement methods for the reflectivity of electromagnetic wave absorbers (EMA) for the normal incident, oblique incident and each polarized wave in the frequency range from 30 GHz to 300 GHz. In addition, these methods are also equally effective for the reflectivity measurement of other materials.