EMC Antenna Fundamentals
The antenna is an essential part of a
test system. In some applications, selecting the best antenna for the
job may be very important. Unfortunately, selecting the right
antenna for the job can be a difficult task, because of variation in the
way manufacturers specify and describe them. This article explains the
basic terminologies employed and their limitations.
5 Volts / Meter Field Strength
10 Volts / Meter Field Strength
20 Volts / Meter Field Strength
50 Volts / Meter Field Strength
100 Volts / Meter Field Strength
200 Volts / Meter Field Strength
Conducted Immunity Testing Overview
Discusses the concept of electromagnetic
immunity testing by means of injecting current into the input and output
cables of a system under test.
Dual Directional Couplers
We often overlook the contribution of the
ubiquitous Dual Directional Coupler in modern EMC immunity test set-ups.
While seasoned EMC test veterans have
voluntarily used directional couplers for
years, they are now required by many EMC standards when conducting a fully
compliant test.
EMC Problems and Their Solutions as Experienced in the EMC Test Lab
This paper will discuss actual EMC problems
encountered in electronic products. The EMC problems are those encountered
in EFT, Surge, ESD,
power fail and emission testing. This paper
will show how to correct these problems using various methods. It will make
a case as to why EMC problems
should be considered in the initial design of
a product before it is submitted to the EMC test lab. Using these methods
will result in a product of
higher quality and lower cost.
EM Test Automotive Transient Generator Product Selector
Updated February 6, 2003
Equipment Selection Criteria for IEC 1000-4-3 Testing
The EMC Directive adopted by the European
Union requires that , for the first time, manufacturers must test their
product for
intrinsic electromagnetic immunity
Importance of Load Tolerance in Specifying RF Power Amplifiers for Radiated
Immunity/Susceptibility Testing
Real world variations in load VSWR cause Class
AB amplifiers to "foldback". Minimum Available Power (MAP) is presented as
a
clear and distinguishing measure of a Class A
amplifier's ability to deliver rated power under these realistic test
conditions.
Power Amplifier Requirements for IEC61000-4-6 Testing
Answers to the commonly asked question: How
much power is required to perform RF conducted immunity testing according to
IEC61000-4-6?
Pulse TWTAS
Amplifier Research's PULSE traveling wave tube
amplifiers (TWTAs) offer a cost-effective source of high RF power for
applications in
which only a low to moderate RF duty cycle is
required.
Radiated Immunity Recs for EMC 89/336/EEC and MDD 93/42/EEC
Amplifier Research packages for radiated
immunity testing per the European Union's EMC Directive (89/226/EEC) and the
Medical
Devices Directive (MDD 93/42/EEC)
RF Conducted Immunity and Bulk Current Injection Testing Article
The CWS500D is built as a modular test system
to control RF immunity tests.
Typical Radiated RF Susceptibility Test Configuration
For test applications which call for real-time
testing.
Update on Proposed IEC 61000-4-4 (EFT) Standard Changes
The most significant changes in the standard
are in paragraph "5 Test Levels" and in paragraph "6 Test Equipment"
specifying the
generator and the coupling/decoupling
networks.
Update on Proposed IEC 61000-4-4 (EFT/Burst Test)
Reprinted from Interference Technology: Annual
Guide 2003 by Harold Kunkel (EM Test AG) and Tom Moyer (Amplifier Research)
Wireless Telecommunications Testing with Ultra-Linear "S" Series Amplifiers
Focuses on the "S" series, a line of microwave
power amplifiers that has been optimized for wireless telecommunications
test use.
|
Using Tapered Chamber to Test Antennas
An industry expert offers some suggestions
for dealing with the challenges of testing today's high-frequency
antennas.
New Broadband EMC Double-Ridge Guide Horn Antenna
Broadband antennas, due to the large frequency bands required by
standards, are the work horse of electromagnetic compatibility testing.
Traditionally the antenna
parameter of interest to the EMC engineer was the antenna factor. The
advent of higher frequency testing has brought the development of a new
double-ridge guide horn design.
A Power Engineer’s Guide to Navigating the EMC Directive
The EMC Directive introduces a mass of
test and measurement requirements that many engineers actively try to
avoid. Understanding the basics is no longer optional,
and is nowhere near as difficult as you
may have been led to believe.
|
