Search results
Results From The WOW.Com Content Network
In case the two measurement ports use the same reference impedance, the insertion loss is defined as: [1] [2]= | |. Here is one of the scattering parameters.Insertion loss is the extra loss produced by the introduction of the DUT between the 2 reference planes of the measurement.
Using this method, typical insertion losses are about 1 dB, a 20% power loss. Most of the power in voice-application audio systems is below 400 Hz, meaning that insertion loss at lower frequencies would be greater. The best transformers reduce mid-band frequencies by 0.5 dB (approximately 10% power loss) or less, resulting in a ten watt ...
The extra loss may be due to intrinsic loss in the DUT and/or mismatch. In case of extra loss the insertion loss is defined to be positive. The negative of insertion loss expressed in decibels is defined as insertion gain and is equal to the scalar logarithmic gain (see: definition above).
A Π pad can be viewed as being two L sections back-to-back as shown in figure 3. Most commonly, the generator and load impedances are equal so that Z 1 = Z 2 = Z 0 and a symmetrical Π pad is used. In this case, the impedance matching terms inside the square roots all cancel and,
6.2 Terms used. 6.3 Symbols used. 6.4 ... (this is usually the case since it is usually required that the input and output impedance Z 1 and Z 2 ... Loss ≥ 0 dB; L ...
One parameter in the passband that is usually set for filters is the maximum insertion loss. For impedance matching networks, a better match can be obtained by also setting a minimum loss. That is, the gain never rises to unity at any point. [48] Time-delay networks can be designed by network synthesis with filter-like structures.
One simply needs to know the input impedance R p and to choose the output impedance R s. Or conversely know R s and choose R p. Keep in mind that R p must be larger than R s. Because reactance is frequency dependent the L network will only transform the impedances at one frequency. Inclusion of two L networks back to back creates what is known ...
The input impedance of an infinite line is equal to the characteristic impedance since the transmitted wave is never reflected back from the end. Equivalently: The characteristic impedance of a line is that impedance which, when terminating an arbitrary length of line at its output, produces an input impedance of equal value. This is so because ...