G9C09 : In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?
A
Approximately 1.5 dB higher
B
Approximately 3 dB higher
C
Approximately 6 dB higher
D
Approximately 9 dB higher
Correct Answer: Approximately 3 dB higher