The wave antenna: A new type of highly directive antenna

Directive Effects for Impulses. The question will naturally arise whether directivity curves calculated for continuous waves, are applicable to the steep wave fronts and pulses of static. The experimental evidence is that they are applicable. It is clear that in the case of the wave antenna, waves on the wire will build up in the direction of travel of the space wave, and relatively feeble waves will reach the opposite end of the antenna, whatever the wave shape or number of waves in the train. As applied to antennas or circuits in which a balance of some sort is employed, to give zero reception for continuous waves from certain directions, the explanation of our experience with static is to be found in the great frequency selectivity of our receiving sets. Harmonic analysis of a pulse would show it to be equivalent to the sum of a large number of trains of waves of different frequencies. Of these the receiving set rejects all but the waves of signal frequency. Another view of the problem is the following: