I performed an electromagnetic simulation of a circularly polarized antenna to observe its far-field characteristics. Instead of focusing on directivity or gain, I wanted to examine the E-field. When the polarization is set to "Circular Directional" in the top menu, and at theta=0 degrees and phi=0 degrees, the value of the left-handed polarization is 11.7 dB (V/m), the right-handed polarization is 25.3 dB (V/m), but the absolute value of the E-field is 22.52 dB (V/m). Also, when the polarization is set to "Linear Directional," the value of the cross-polarized component is 22.5 dB (V/m), the value of the co-polarized component is 22 dB (V/m), but the absolute value is also 22.5 dB (V/m).
How can this happen? Why is the absolute value of the far-field not larger than the orthogonal components of the field? Shouldn't the absolute value be the vector sum of the orthogonal far-field components?
