generalized scattering matrix of an antenna

Mehmet_5971

How can we determine the generalized scattering matrix (with network and radiation ports)  of a single antenna using spherical wave expansion in FEKO ?  

Generalized scattering matrix contains input reflection coefficient (Γ), antenna receiving coefficients (R), antenna transmission coefficients (T) and antenna scattering coefficients (S) for spherical harmonic modes.  Antenna scattering matrix  defines the relation between incoming and outgoing (scattered) spherical waves from the antenna.

 

 

 

 

Torben Voigt

Hi Mehmet,

Please have a look at tattached Hybrid Methods Based on Generalized Scattering Matrices.pdf

For the antenna scattering matrix / generalised scattering matrix (GSM), you can also refer to the publication Multipole and S-Parameter Antenna and Propagation Model.pdf, also attached. Another Feko customer is computing the GSM out of the spherical mode expansion (exported to the *.sph file) following the formulations in the book J. E. Hansen: Spherical Near-Field Antenna Measurements, 1988.

For waveguide ports, Feko can natively compute and export the GSM into an XML based *.chr format (should be easy to parse externally). Request at the DA card via EDITFEKO:

Hope this helps!

Best regards,
Torben Voigt

Hybrid Methods Based on Generalized Scattering Matrices.pdf

Multipole and S-Parameter Antenna and Propagation Model - Haynes.pdf