MATLAB: How to use the SETOP function in RF Toolbox 2.4 (R2008b)

RF Toolbox

The documentation states that the SETOP function changes the operating conditions of a circuit or data object to those specified by the condition/value pairs. However, it does not give an example on how to use this function.

Best Answer

The condition/value pairs are defined in the .p2d or .s2d files. Some example .s2d files should be located in the $MATLABROOT/toolbox/rf/rfdemos directory. For instance, the default.s2d file has a condition called "Bias" defined.

Execute the following commands at the MATLAB prompt to create the data object and view the possible values:

a = read(rfckt.amplifier,'default.s2d');
setop(a)

To define additional condition/value pairs in the .p2d or .s2d file, simply edit the file and add "VAR $condition=$value" entries.

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MATLAB: Should the Coaxial Transmission Line block include the parameter tangential dielectric loss in RF Blockset 2.2 (R2008a)

This enhancement has been incorporated in Release 2009a (R2009a). For previous product releases, read below for any possible workarounds:

The parameter tangential dielectric loss is not available for the Coaxial Transmission Line block in RF Blockset.

To work around this issue, add this property to coaxial objects defined from the MATLAB command line and then use the General Circuit Element block from the Black Box Elements library to import the new coaxial object into RF Blockset as follows.

1. Rename two files under the folder ‘toolbox\rf\rf\@rfckt\@coaxial’: schema.p and calckl.m

2. Copy the attached two files, calckl.m and schema.p, to the same folder.

3. Quit MATLAB and restart it.

4. Define the coaxial object as follows:

mycoaxial = rfckt.coaxial

5. The object, mycoaxial, shows the following two new properties:

 DielLossSpec: 'SigmaDiel' 
 TanDiel: 0

6. Set the 'RFCKT object' parameter of the General Circuit Element block to the MATLAB variable mycoaxial.

MATLAB: Help needed with while loop code

while RF_tot<=8 && D_var <= 30
    D_var=D_var+1
    RF_tot=RF_tot+RF(D_var)
end

Best wishes

Torsten.

Best Answer

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MATLAB: Should the Coaxial Transmission Line block include the parameter tangential dielectric loss in RF Blockset 2.2 (R2008a)

MATLAB: Help needed with while loop code

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