Impedance matching networks are electrical circuits which, when connected between two networks, match the output impedance of the source (the first network) to the input impedance of the load (the receiving or second network). The purpose of matching these two impedances is to minimize wave reflection and/or to maximize the transfer of power between the system and the load. In this product area, impedance matching networks are complete systems with either manual or automatic modes of operation. Manual devices must be set by the user to monitor or tune a particular load. Automatic devices monitor or tune loads automatically. Typically, both types of impedance matching networks are used in large systems such as telecommunications and computer networks.
Selecting impedance matching networks requires an analysis of cooling types and performance requirements. Typically, devices are cooled by either forced air or water. Frequency range, rated power range, input impedance, tuning range, output current rating and output voltage rating are important performance specifications to consider. In a system, impedance mismatches cause some of the transmitted energy to be reflected back to the source. The signal frequency determines the amount of energy that is reflected. Voltage standing wave ratio (VSWR), a unit-less ratio ranging from 1 to infinity, represents the amount of reflected energy at the input or output of the device. A value of 1 indicates that all the energy passes through the impedance matching networks. Any other value indicates that a portion of the energy is reflected.
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MKS Instruments - Impedance Matching Networks ENI® Impedance Matching Networks Matchwork® Impedance Matching Networks provide efficient, quick tuning from 40W to 10kW and 2MHz to 40.68Mhz. See MKS Instruments, Inc. Profile & Catalog |
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MKS Instruments the world's broadest source of instruments,... Impedance Matching Networks Plasma Metrology See MKS Instruments, Inc. Profile & Catalog |
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