ANSI C63.5:2001 pdf download.Electromagnetic Compatibility- – Radiated Emission Measurements in Electromagnetic Interference (EMI) Control- Calibration of Antennas(9 kHz to 40 GHz).
ANSI C63.5 provides methods for determining antenna factors of antennas used for radiated emission measurements of electromagnetic interference (EMI) from 9 kHz to 40 GHz. Antennas included are linearly polarized antennas, such as loops, rods (monopoles), tuned dipoles, biconical dipoles. log-periodic dipole arrays. hybrid linearly polarized arrays, broadband horns, etc., that are used in measurements governed by ANSI C63.4-2000. The methods include standard site, reference antenna, equivalent capacitance substitution, standard transmitting ioop, standard antenna, and standard field methods. The latter three methods arc incorporated by reference in Clause 4.4.
Harmonization of this standard with international standards is achieved by providing one measurement geometry in the 30 MHz to 1000 MHz frequency range. The word shall” is used in this document to indicate mandatory requirements. The words ‘should” or “may” are used to indicate that among several possibilities one is strongly recommended but not mandatory.
2. References
The Ibilowing references shall form a part of this standard to the extent referenced. When the standards referred to in this standard are superseded by a revision, the revision shall apply.
[l]ANSI C63.4-2000. American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.
[2] ANSI C63.6-1996. American National Standard Guide for the Computation of Errors in Open-Area Test Site Measurements.
[3] ANSI C63.7-1992, American National Standard Guide for Construction of Open-Area Test Sites for Performing Radiated Emission Measurements.
[4] ANSI C63.l4-l99. American National Standard 1)ictionary for Technologies of’ lilectromagnetic Compatibility (EMC), Electromagnetic Pulse (EMP), and Electrostatic Discharge (ESD).
3.0 Definitions
The following definitions apply specifically to the subject treated in this standard. For additional definitions, see ANSI C63.14-1992 and IEEE SW 100-1996.
3.1 ambient level: The magnitude of radiated and conducted signals and noise existing at a specific test location in the absence of signals from a test sample.
3.2 antenna factor: Ratio of the electric field in the polarization direction of the antenna to the voltage induced across the load connected to the antenna and expressed in decibel form (20 log (E/V0).
3.3 free-space antenna factor: Antenna factor that is not influenced by adjacent objects (in dB).
3.4 Geometry Specific Correction Factors (GSCF): Correction factors (in dB) that are calculated or measured for each specific geometry and that are added to the site-attenuation that has been calculated using the theoretical model that employs near free-space or free space antenna factors. These correction factors include the effect of the 1/r2 and 1/r3 radiation terms, non-uniform illumination of the receive antenna, mutual coupling between the transmitting and receiving antennas, and mutual coupling between the antennas and the ground plane.ANSI C63.5 pdf download.