impedance matching

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impedance matching

n.
The use of electric circuits, transmission lines, and other devices to make the impedance of a load equal to the internal impedance of the source of power, thereby making possible the most efficient transfer of power.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Otherwise, with an automatic system, a better impedance match can be achieved within milliseconds while the manual impedance process usually takes a few seconds.
The sheet with well-designed parameters (permittivity, thickness, and height above the array) acts as a shunt susceptance to achieve an impedance match at one scan angle.
This means that a good impedance match can be designed directly into the antenna, and a high antenna efficiency can be achieved.
From Figures 3 and 4, the existence of external coupling network makes the port impedance match well.
Since the RFID tag is designed to provide an impedance match between two components with complex impedances, the power reflection coefficient (PRC) is used to determine the bandwidth of the RFID tag antenna by using the criterion PRC < -3dB [11].
A small amount of reflected amplitude, an indication of a good impedance match, would be a large, negative number in dB.
In an array application, the notch array element can be designed for a good impedance match to free space for all polarizations over a wide bandwidth and field of view.
This may be due to the impedance discontinuity between the feed line and the radiation patch, so the way to improve the impedance match is making the impedance change gradually.
The hybrid is set at 1.575 GHz and proceeded to adjust the transmission line width to achieve better impedance match. The simulated S parameters of the design circular branch-line hybrid in [11] are given in Figure 2.
This is not a good impedance match and the pull up current changes with the termpwr voltage.
The SCSI bus termination provides the negation of the signal when no driver is actively driving the bus and provides an impedance match. SCSI buses must be terminated at each end of the bus; there should be no termination enabled in the middle of the bus, only the end devices.
Therefore, if one of these L configurations is borrowed from an existing design and applied to a new device or load it is likely to fail to provide an impedance match, even after lengthy attempts to use an optimizer.