What does “front-to-back ratio” mean in reference to a Yagi antenna?
The number of directors versus the number of reflectors
The relative position of the driven element with respect to the reflectors and directors
The power radiated in the major lobe compared to that in the opposite direction✓الإجابة الصحيحة
The ratio of forward gain to dipole gain
الشرح
Front-to-back ratio compares the power radiated in the main lobe with the power radiated 180 degrees away from it, expressed in decibels. The ratio of forward gain to dipole gain is instead the antenna's gain in dBd.