ORIGINAL: Dave

JOHN SOHM IS ABSOLUTELY RIGHT. (Post # 304)

The 2.4GHz wavelength is directional. Since we can not focus a high gain directional parabolic dish antenna
between our constantly moving model airplane and our transmitter, we have to use an omnidirectional vertical
antenna system which has much lower signal intensity. Since we have to use an omnidirectional antenna system,
the electromagnetic waves will scatter and diffract from objects and from the terrain around us. When the diffracted
wave reaches the receiver antenna, it is slightly lags behind the signal which traveled to the receiver antenna in a
straight line that creates interference due to the phase canceling effect.