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September 2010 [Test & Measurement] Multi-Paction Tests Run At High Power Satellite-communications (satcom) systems operating at high power levels are subject to a unique nonlinear breakdownvoltage phenomenon in a vacuum or near-vacuum environment. Known as multi-paction effects, they can degrade the performance of a space-based system and even lead to catastrophic damage to system components. Multi-paction effects are difficult to predict but, fortunately, can be measured with a system incorporating the proper combination of... May 2009 [Test & Measurement] System Simplifies Multiport S-Parameter Measurements Standard RF/microwave vector network analyzers (VNAs) are designed for testing twoport devices, such as amplifiers and, in some cases, components with as many as four ports, such as a power divider or combiner. But in the case of a device under test (DUT) with as many as 62 ports, special modifications are required. Such a specialized VNA-based system was developed recently by In-Phase Technologies (Clarksburg, NJ) for a custom requirement. At the heart... |
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