On the previous page we introduced impedance matching with parallel inductors and capacitors. On this page, we'll illustrate how transmission lines can be placed in parallel to perform impedance match ...
Just as the standard "impedance" Smith Chart made working with series inductors and capcitors easy, the admittance Smith Chart will make working with parallel inductors and capacitors simple. We'l ...
The discussion thus far has centered around the "standard" Smith Chart, also known as the impedance Smith Chart. The impedance Smith Chart isn't great for working with parallel components (paralle ...
On the previous page, we showed how to use series inductors and capacitors to cancel out the reactance of a load. However, as seen in the second example on the previous page, this method won't work un ...
On this page, we'll start the beginning of impedance matching, by illustrating the effect of a series inductor or a series capacitor on an impedance. The Smith Chart makes this easy to visualize.
I ...
On this page, we'll see how the Smith Chart makes viewing the impedance transformation due to transmission lines very simple. That is, suppose that we have an impedance ZL on the end of a transmission ...
On the previous Smith Chart page, we looked at the set of curves defined by zL = R + iY, where R is held constant. The result were constant resistance circles on the Smith Chart.
On this page, we wil ...
On this page, we'll start filling in the Smith Chart, to understand where all the complicated curves come from on the Smith Chart (See Figure 1 on the intro to Smith Chart Page). Before we jump in to ...
In this tutorial, we will introduce and explain Smith Charts, and then given an introduction to impedance matching. We will then use the Smith Chart to perform impedance matching with transmission lin ...
Specific Absorption Rate (or SAR) is a measure of how transmitted RF energy is absorbed by human tissue. SAR is a function of the electrical conductivity (, measured in Siemens/meter), the induced E-f ...
For the best estimate of an antenna's performance in real conditions, the measurement of the antenna should be performed in a location that closely resembles the antenna's real world operating environ ...
In this section, we'll be concerned with measuring the impedance of an antenna. As stated previously, the impedance is fundamental to an antenna that operates at RF frequencies (high frequency). If th ...
Fundamental to an antenna's radiation pattern is its polarization. On this page, we'll discuss methods and techniques for measuring the polarization of an antenna. Note that the polarization varies de ...
For an antenna's radiation pattern to be completely specified, we need the magnitude of the power received or transmitted, AND the phase. These measurements should be specified in two orthogonal direc ...
On the previous page on measuring radiation patterns, we saw how the radiation pattern of an antenna can be measured. This is actually the "relative" radiation pattern, in that we don't know what ...
