Circular Polarized Antenna Reflection Coefficient

[mickey123]

Dear all,

Is it always necessary that the circularly polarized antenna should show a 'w-shape' at the resonant frequency in the reflection coefficient graph?

Thanks in advance

 

[PlanarMetamaterials]

I'm not sure what a "w" shape refers to specifically, but no, there is no such requirement on the qualitative form of the reflection coefficient.

 

[mickey123]

Thanks very much for your reply

It is said that the 'w-shaped' means the two v shapes of the w are the orthogonal components of circular polarization. If you can help me regarding this, it would be helpful.

 

[PlanarMetamaterials]

I assume you're referring to the frequency-domain. That could be the case, but it's hard to say without any supporting information about the antenna in question. Many antennas support both polarizations at the same frequency.

 

[mickey123]

It looks like this

Any help regarding this ?