A detailed examination of radiated field and transmitted power test techniques MICHEL LE CLECH, EMITECH ABSTRACT HIGH PULSED E-FIELD TEST LEVELS increased at the end of the 1990s. At the same time, many efforts were made to develop a very efficient test technique with the mode-stirred chamber. However, by improving the antenna design and test distances, comparable levels can … [Read more...]
Photonic Bandgap Structures and Their Application to EMC Antennas
PBG structures have been explored as a way of reducing harmonics. Vincente Rodríguez-Pereyra, Ph.D., ETS-Lindgren The concept of photonic structures has recently been applied to the study of the microwave frequency (MW) range [1, 2]. Photonic bandgap (PBG) structures are analogous to a crystal lattice. It is known that in natural crystals there are certain non-occurring or … [Read more...]
EMC Design Considerations for Medical Products
Collocation of sensitive medical electronic devices can result in equipment malfunction in medical settings ANTHONY A. DIBIASE INTERACTION BETWEEN MEDICAL products and their electromagnetic environment (EME) presents new challenges to medical device manufacturers, medical service providers, and the regulatory authorities who are responsible for insuring the health and safety … [Read more...]
Impedance Termination of Cable Shields to Reduce EMI Coupling
Surge damage as a result of long cables connected to low voltage data systems can be prevented RICHARD MEININGER & ROBERT BLOUCH This article proposes a solution to the problems encountered when long cables are used to connect low voltage data systems, and either data interference or lightning surge damage is encountered. Three separate interference regimes are addressed: … [Read more...]
Introduction to Measurement Uncertainty for Antenna Calibration
Critical items need to be identified for a particular calibration method MIKE HOWARD The purpose of this article is to introduce the reader to basic elements and concepts in the computation of measurement uncertainty for antenna calibration. Measurement uncertainty is a tool used to account for errors associated with a measurement system. Uncertainty can be used for … [Read more...]
Understanding the Measurement Uncertainties of the Bicon/Log Hybrid Antenna
Surge damage as a result of long cables connected to low voltage data systems can be prevented RICHARD MEININGER & ROBERT BLOUCH Since their first introduction in 1994 at the Roma International Symposium on EMC, bicon/log hybrid antennas have become very popular in EMC labs worldwide. Because there are no band breaks in frequency sweep, test time and effort are reduced. … [Read more...]
