AR RF/Microwave Instrumentation has introduced a new Multi- tone RF Test System that reduces radiated immunity testing from days to hours. The Multi-tone system, model MT06000 (80 MHz – 6 GHz), includes all the necessary instruments to perform radiated immunity testing per IEC 61000-4-3 except the required amplifiers, antennas and directional couplers. Amplifiers are selected … [Read more...]
Amplifers
High Linearity Downconverting Mixer
Linear Technology announces the LTC5544, a 4GHz to 6GHz high dynamic range downconverting mixer. The LTC5544 mixer offers high linearity with 25.9dBm IIP3 (Input Third-Order Intercept), high conversion gain of 7.4dB owing to its integrated IF amplifier, and a noise figure of 11.3dB. These performance characteristics enable excellent dynamic range performance for both main … [Read more...]
Half Watt RF Driver Amplifier
Analog Devices, Inc. has introduced the ADL5324 half-Watt RF driver amplifier. The ADL5324 offers superior power efficiency and temperature tolerance. The ADL5324 operates over a wide temperature range (-40° C to +105° C), and can be biased to operate on less power. In addition, the ADL5324 features dynamically adjustable bias which allows RF designers to set the driver’s power … [Read more...]
IEC Publishes Optical Amplifiers Standard
IEC 61291-1:2012 applies to all commercially available optical amplifiers (OAs) and optically amplified assemblies. It applies to OAs using optically pumped fibers (OFAs based either on rare-earth doped fibers or on the Raman effect), semiconductors (SOAs), and waveguides (POWAs). This third edition cancels and replaces the second edition published in 2006. It is a technical … [Read more...]
Fundamentals of EMC Design: Our Products Are Trying To Help Us
INTRODUCTION We often design electronic products only to find that when we test them for electromagnetic compatibility (EMC), their emissions and/or immunity are not as good as we need them to be. Usually, at this time, we feel as if we are fighting against the laws of physics to contain the conducted and radiated emissions, or to reduce susceptibility. But in fact the laws of … [Read more...]
Multi-Tone RF Test System Tests Reduces Radiated Immunity Testing Time
AR RF/Microwave Instrumentation is introducing a new Multi- tone RF Test System, model MT06000 (80 MHz – 6 GHz), includes all the necessary instruments to perform radiated immunity testing per IEC 61000-4-3 except the required amplifiers, antennas and directional couplers. Amplifiers are selected and sized based on your required field levels and testing needs.The system mimics … [Read more...]
Simple Method for Predicting a Cable Shielding Factor, Based on Transfer Impedance
For a shielded cable, an approximate relationship valid from few kHz up to the first cable resonance can be derived from its Transfer Impedance (Zt) allowing to predict the cable shielding factor. This Cable Shielding factor, as a figure of merit, is often preferred by engineers dealing with product specifications and early design. Being not necessarily EMC specialists, they … [Read more...]
Christmas Music in the Chamber
How a sprinkler system brought radio noise to a chamber and the techniques used to find and remove it. Candace Suriano and John Suriano Auburn Hills, Michigan, USA Anechoic and semianechoic or ALSE (Absorber Lined Shielded Enclosure) chambers are supposed to prevent radio signals and other radiated noise in the environment from being detected inside the chamber. A chamber … [Read more...]
The HF Current Probe: Theory and Application
This article describes one of the most valuable tools in the EMC engineer's “bag of tricks” – the high-frequency current probe. Current probes are invaluable for measuring high-frequency common-mode (or “antenna”) currents flowing on wires or cables. Experience has proven that poorly terminated (bonded or filtered) cables are the no. 1 cause for radiated emissions failures at a … [Read more...]
RF DC/DC Switching Converters for 2G, 3G and 4G Power Amplifiers
Texas Instruments Incorporated added a duo of new RF DC/DC switching converters to its industry leading portfolio of RF power management integrated circuits (ICs). The new National LM3242 and LM3243 regulators are adaptive power supply ICs that minimize power consumption of the RF power amplifier (PA) across all operating conditions. Together with the National LM3241, the ICs … [Read more...]
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