IEC PAS 62431:2005
Withdrawn
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A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Measurement methods for reflectivity of electromagnetic wave absorbers in millimetre wave frequency
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
15-02-2019
English
22-07-2005
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
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