![]() The computational values are required to set up the type of structure and target component values. In-situ RF lab measureme nts, along with tuning work, have to be consid ered for determ ining the proper final values. So in a sense yes the Smith form is the same as equivalence of a complex matrix to the diagonal matrix with 1 on diagonal with nonzero rows equal to rank of the matrix. Each (curved) line is a contour of constant x. Each circle on the Smith Chart is a contour of constant r. Above a few tens of megahertz, theoretical calculations and simulations are often insufficient. complex plane right in the center of the Smith Chart (Figure 2), then for any plotted on this plane, the Smith Chart computes the real and imaginary parts of the normalized impedance. The matching task is required for a proper transfer of signal and energy from a "source" to a "load." At high radio frequencies, the spurious elements (like wire inductances, interlayer capacitances, and conductor resistances) have a signif icant yet unpredic table impact on the matching network. Typically these incl ude the antenn a to the low-noise amplifier (LNA), power- ampli fier output (RFOU T) to the antenna, and LNA/VCO output to mixer inputs. One is the need to match the different impedances of the interconnected blocks. When dealing with the practical implementation of RF applications, there are always some nightmarish tasks.
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