This performance is characterized in that:
All this is explained because in EAntenna:
Features of the 432LFA23
That is the question when designing this antenna. To have such an extraordinary gain and gain ratio F / B (front vs. back) close to 40 dB.
* Gain dBi (gain over isotropic dipole in free space) = -2.15 dBd
** Ratio Gain Front / Back "F / B" (gain when the antenna is rotated 180 ° azimuth direction)