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 ?
The width and the length of the line used to calculate the effective dielectric constant have been chosen according to the dimensions of the impedance matching network, as will be seen in the next section.
P]) before the input matching network is used to compensate the phase difference between the two branches, reducing the power-combining loss and maximizing the saturated power of the proposed IADPA.
The parameters of decoupling network and matching network elements are calculated and specified in Table 1.
1111] to design the input matching network with the well-known single, open-circuited stub technique.
IMS2012 will serve as backdrop for the release of a new WiSpry paper entitled, "Direct Calculation Method for Matching Network Dynamic Control.
The transmission line is terminated by a short at one end and connected to a tunable L-shaped matching network at the other end.
Next, the proposed decoupling and matching network is used to reduce the mutual coupling of this compact array.
Advanced Energy has extended its digital matching network platform to include simplicity yet high reliability in one of the most affordable matching networks on the market today.
a suitable matching network to match the complex load impedance to the antenna impedance, iii.
The effect of the offset on the perturbation segment and the design of a simple matching network are discussed
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.
Limited Tenders are invited for Supply And Installation Of Rf Power Supply, Digital Matching Network And Required Cables With Essential Accessories And Spares Etc.