![]() (The methodology of impedance matching in the wideband case introduced and discussed in this chapter was developed in 2005 by the author specially for a UWB (ultra wideband) system and has not been made public until now).įigure 4.1 shows the difference of the return loss or impedance on the Smith Chart between the narrow and wideband cases. In this chapter, we will apply the same process of impedance matching as in the narrowband case, but the main effort will to expand the skill from narrow to wide bandwidth. In the wideband case, instead of a single frequency, the entire wide bandwidth must be taken care of, which makes impedance matching somewhat difficult. However, in the narrowband case, only one frequency needs to be taken care of in the process of impedance matching because a narrow bandwidth can be represented approximately by the central frequency. ![]() The methodology of impedance matching is basically the same between narrow and wideband cases. Impedance Matching in the Wideband Case 4.1 Appearance of Narrow and Wideband Return Loss on a Smith Chart
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