Neill Tucker

Hi Changshun,
The change in coordinate system for the rectangular patch is only a transposition of axes : x->Z, y->X and z->Y where x,y,z are the original model and X,Y,Z are those used by ArrayCalc. This means that the same formulas can be used as long as the axes are transposed before the formulas are applied. (Ref patchr.m lines 32-38 in the element models directory).

The reason for the transposition is to ensure the Patch's E-field is aligned with ArrayCalc's X-axis. (See section 4.2 the Theory of operation for why this convention is used).

I hope this helps,

Neill

Dear Chandra,

I'll e-mail you directly as the answer might be a little long for this forum.

Kind regards,

Neill

Dear Sam,

It looks like you might have run the rect_array.m file without running init.m first. Rect_array.m fills the array_config matrix and this is initialised in init.m. Check out the example ex2a for a typical application.

Hope this helps,

Neill

I would suggest changing line 37 of loads2p.m to if ( any(L~=(-1)) && ~strncmpi(L,'!',1) && ~strncmpi(L,'#',1) );

This accounts for more than just two header lines and takes care of the option line.

I also noticed that the file assumes that the data is in dB magnitude format. Perhaps there should be something in the header of loads2p similar to % Data must be save in # Hz S DB R 50 format.

This may not be the best way to phrase it, but its an idea.

A revision down the road might analyze the option line (line start with #) and adjust accordingly.

Thank you for writing these routines. It has saved me countless hours over the past five years.