IEEE 1302-2019 pdf download – IEEE Guide for the Electromagnetic Characterization of Conductive Gaskets in the Frequency Range of DC to 40 GHz.
3. Definitions, acronyms, and abbreviations 3.1 Definitions For the purposes ofthis document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.’ decibel (dB): Ten times the logarithm to base 10 of a ratio of two powers. dBμA/m: Decibels above a microampere per meter. dBpuV/m: Field strength in decibels referenced to one microvolt per meter. dBm: Decibels relative to a milliwatt. dynamic range (DR): The range of amplitudes over which the receive system operates linearly. For a measurement, the DR is the difference between the reference level and the minimum discernable signal above the noise floor, normally with an amplitude of3 dB (or more) above the noise floor. electromagnetic compatibility (EMC): The ability ofa device, equipment, or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment. electromagnetic interference (EMD): Any conducted or radiated electromagnetic energy that interrupts, obstructs, or otherwise degrades or limits the effective performance of telecommunications or other electrical and electronic equipment. far field: The elecric and magnetic field of an antenna at distances more than one sixth (/2π) the wavelength of the carrier signal being used for communications. In this region, waves are dominated by planar wave mode transmission. gasket (RF): A flexible component made of ectrically conductive material, used to form a low impedance connection between two pieces of electrically conductive materials to seal an aperture in a conductive enclosure.
All gaskets behave as a complex network of resistors, inductors, and capacitors at frequencies where their physical dimensions become significant fractions of a wavelength, or the spacing between constituent elements approach or exceed resonant dimensions. Further, the gasketed joint is polarized. This polarization is the consequence of the joint being long and narrow and of the gasket conductors being preferentially aligned with a field component of the incident wave. Furthermore, the cross section of the gasket (circular, rectangular) and the mechanical design of application (fat/flat surfaces, groove structure, compression, or closing pressure, etc.) may have a dominant effect on the final behavior or the gasketed joint. Also, special care shall be taken for the mating surfaces, concerning possible corrosion over the lifetime and the requirements set by the restriction ofhazardous substances (RoHS) restrictions.