The orientation of the electric field lines in the electromagnetic field radiated or received by the antenna.
- Dipole-Type Antennas in EMC Testing: Part IIPart II of this two-article series focuses on log-periodic and biconical antenna impedance, VSWR, and radiated emissions measurements.
- A Historical Look Back: The 1977 CBEMA Paper on Electromagnetic Emanations: Part 2
The first part of this paper reviewed the first one-third of the report including the Title of the Paper, the Background to its development, the Members of the Subcommittee that developed the report, Definitions, Table of Contents, Scope and Section 4. This second part of the paper will look at Section 5 (Susceptibility of Communications Receivers to Commercial EDP/OE Emanations) of the Report.
- Time-Saving Effects of FFT-Based EMI Measurements
In the world of RF and microwave testing, measurements required for EMI are among the most complex and time-consuming since they incorporate a wide array of specific tests that must be performed over an array of frequencies. They typically require not only many hours of test time but even more for configuring and reconfiguring the test set-up.
Fortunately, advances in the signal processing abilities of test equipment have reduced test time over the years. However, the real improvements are the result of enhancement measurement software, greater integration, automation of the test process, and increasing acceptance of time-domain techniques based on Fast Fourier Transform (FFT) for use in preview measurements of the disturbance spectrum, for example. Together they are slowly making the EMC measurement process faster, and more efficient and accurate.