#HOW TO USE A SMITH CHART SOFTWARE#
#HOW TO USE A SMITH CHART SERIES#

This article was originally published on EDN. I don't know for sure that these L1, C1, and C2 values are real-world proper, but lowering L1 to only 1 mHy yields a Smith chart result that is visually indistinguishable from the track shown.

#HOW TO USE A SMITH CHART SERIES#

The right side of Figure 2 includes in red going clockwise as frequency is swept upward through series resonance, the crystal's Smith chart track for ESR = 6 ohms, L = 10 mHy, C1 chosen for series resonance at 10 MHz, and for C2 = 30 pF. The left side of Figure 2 is simply the Smith chart for limited ranges of the real and imaginary coefficients based on the previously-presented equations. The equivalent circuit of a crystal is taken as follows.ДЇigure 1 Here is the equivalent circuit of a quartz crystal.Дoing a Smith chart plot of this circuit yields the following result.ДЇigure 2 This is a Smith chart plot for the circuit in Figure 1. вЂњOne of my interview questions is, what does a quartz crystal look like on a Smith chart? That throws most people.вЂќ It makes learning to use the Smith Chart fun and easy.

#HOW TO USE A SMITH CHART SOFTWARE#

The software Smith facilitates an interactive use of the Smith Chart. Smith Chart is taught in almost all EE curriculums. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit.

but instead Im getting something like 2e-12 as the prime center. Im plotting results on a Z-Smith, which i thought should give me Re (Z)1 (normalized). The Smith Chart has been used for matching a transmission line using a single or a double stub. sp analysis with a simple setup-port set to 100ohm, with 100ohm load. Remember the distance on the Smith Chart is in terms of wavelength. Travel clockwise (transform towards the generator) on the circle by a distance equivalent to the line length, starting at zL. Enter the normalized load impedance, zL 1 + j 1 2. One comment in particular, from Dan Bullard, caught my attention: It has be en a proven tool for many decades. Now consider this process on the Smith Chart. In response to the prior Smith chart essay, several comments were offered via LinkedIn groups. The Smith Chart is a clever way of graphically solving impedance matching problemsit is still useful today despite the availability of computer based solutions.

How to use a smith chart