3D Smith Chart
3D Smith Chart
Is a new 3d telecommunications design tool with applications mainly in high frequency engineering
News: An extended free demo version of the 3D Smith chart tool was added on 10 January 2013!
A desktop version of the 3d Smith chart tool will be availabe online before July 2013
The 3D Smith was most recently presented on 24 April 2013 at the Telecom Faculty of the UPV Valencia (Spain) .
A novel application of the 3D Smith chart was presented at Asia-Pacific Microwave Conference on 7 December 2012- Kaohsiung, Taiwan
The free 3D Smith chart Java demo generalizes the Smith chart on circles on the unit sphere (thus just on the surface- sphere= surface of the unit ball)
It is intented to be a complete and compact Smith chart that includes both the entire reflection coefficient and impedance planes,
one may switch to the other through a rotation
It is desired to be a design tool for both passive and active circuits
Amplifiers, Oscillators, Active filters, lossy matchings designs are eased.
An important visual feature is the capability to plot stability circles in a compact manner
All possible situations for stability circles are included on the 3D Smith chart
an impossible thing on an extended 2D Smith chart. Some examples are plotted below
The main mathematical "trick" of the 3D Smith chart was used by Escher in his arts and by Mandelbrot in the fractal theory too
Tool: It uses just circles on the surface of the unit sphere
The north hemisphere is only for passive circuits.The south hemisphere is for active circuits
or try the
In the last years several attempts were done to develop a 3D Smith chart suitable for both active and passive design. The 3D Smith chart presented here is based on the June 2011 MWCL journal article "A 3D Smith chart based on the Riemann sphere for active and passive microwave circuits" The article uses for the first time inversive geometry on the Riemann sphere (used sometimes without knowledge in arts too) and unifies the active circuits and passive circuits design generalizing the Smith chart. Latitude and longitudes become the important 3D Smith chart tool options in designing-while the theory behind is from pure mathematics-South pole = mapping of infinity. Important details can be found in the IEEE June 2011 MWCL and in the July 2012 Microwave Journal articles
( tks to prof T.J. Brazil, University College Dublin, Ireland and to Stepan Lucyszyn- EUMC chairman)