Impedance matching

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Impedance matching

The use of electric circuits and devices to establish the condition in which the impedance of a load is equal to the internal impedance of the source. This condition of impedance match provides for the maximum transfer of power from the source to the load.

The maximum power transfer theorem of electric network theory states that at any given frequency the maximum power is transferred from the source to the load when the load impedance is equal to the conjugate of the generator impedance. When these conditions are satisfied, the power is delivered with 50% efficiency; that is, as much power is dissipated in the internal impedance of the generator as is delivered to the load. In general, the load impedance will not be the proper value for maximum power transfer. A network composed of inductors and capacitors may be inserted between the load and the generator to present to the generator an impedance that is the conjugate of the generator impedance (see illustration).

References in periodicals archive ?
Each of the three paths contain a tunable inter-stage and a final tunable matching network to optimize the performance of the multi-mode PA to the operating cellular band.
Fourth, with the input matching network in place, we place a second source at port 2 and find the quasi-linear value of [S.
They deliver up to +18dBm output power with 3 percent EVM for 64QAM/OFDM in the full 5GHz band, including all losses of the antenna switch and impedance matching network.
ZL70102-based MICS RF transceiver with integrated matching network, SAW filters for suppression of unwanted blockers and antenna tuning;
Qizheng Gu to Present Paper Entitled, 'Direct Calculation Method for Matching Network Dynamic Control'
Tenders are invited for supply, installation & commissioning of 600w automatic tuner impedance matching network and accessories for 13.
org features the largest statewide volunteer matching network in the nation and serves as a "one-stop shop" where visitors can enter their zip code, identify their areas of interest and then be matched with local volunteer opportunities and organizations.
Initiative Is Largest Statewide Volunteer Matching Network in the Nation, Connecting Californians to Volunteer Opportunities Across the Golden State
NasdaqGM:AEIS), a leader in power conversion solutions, announced todaythat it will launch the company's newest addition to its leading matching network product portfolio, the Navio(TM) digital matching network, at the 54th annual SVC TechCon 2011 scheduled for April 19-20 in Chicago, Ill.
Together, the Cesar RF generator and VarioMatch matching network comprise a full-featured RF power delivery system that meets ECD Ovonics' critical specifications.
Nasdaq: AEIS), a leader in power conversion solutions, announced todaythat it will showcase its innovative new products, the Paramount([R]) Series of power generators, and the Navigator([R] )II matching network, at SEMICON Korea 2011.
AE Also Showcasing Litmas(TM) RPS 1501 and 3001 Remote Plasma Source Platform, Summit(TM) Specialized DC Power System and Navigator(TM) Digital Matching Network