SimSmith: Smith Charts made simple

Описание

Mike, KA4CDN presents SimSmith: a powerful free tool for interactive RF circuit analysis using Smith charts. SimSmith helps us understanding what impedance is, how Smith Charts represent impedances and simplify the process of using Smith Charts to visualize and solve many important matching problems amateur radio operators are likely to encounter. SimSmith is an key tool when solving problems with transmission line and designing RF matching circuits.

Once you finish watching the video, please visit @ae6ty channel for more info on SimSmith: https://www.youtube.com/@ae6ty
@w2aew channel has tons of fascinating RF nerdity: https://www.youtube.com/@w2aew

Slides from @w2aew Smith Charts video (https://www.youtube.com/watch?v=TsXd6GktlYQ) and @ae6ty SimSmith video (https://www.youtube.com/watch?v=XAefghg6BLw) used with permission from authors.

00:00:00 Intro
00:02:08 Basics of complex impedance
00:04:59 Plotting impedance on a rectangular graph
00:06:19 Impedance v.s. Admittance
00:06:47 Series and parallel connection of components
00:08:06 Quick review of Smith Charts
00:09:48 What is a Smith Chart?
00:10:05 Impedance normalization
00:10:56 Z regions on the Smith Chart
00:11:33 Key points on the Smith Chart
00:12:17 Constant resistance circles
00:12:54 Constant reactance arcs
00:13:22 Plotting a complex impedance on a Smith Chart
00:14:10 Adding series impedances on a Smith Chart
00:15:07 Plotting admittance
00:16:15 Admittance curves
00:17:00 Adding complex impedances in parallel
00:17:36 Adding elements
00:18:29 More Smith Chart tricks
00:19:12 Transmission lines
00:20:57 Impedance matching
00:22:37 SimSmith
00:27:55 The basics
00:32:05 Experiment: Changing the load impedance seen by the generator
00:38:39 Matching impedance of an Extended Double Zepp antenna
00:43:56 Matching the antenna using a ladder line
00:47:35 Matching the antenna using coax stubs
00:52:50 Shorted coax stub in series
00:53:41 Open coax stub in series
00:56:21 Shorted coax stub in parallel
00:57:21 Open coax stub in parallel
00:59:40 Matching impedance using L networks
01:06:51 Finding antenna impedance from measurements
01:10:46 Evaluating coax stub filters
01:14:51 References


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