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Helical Antenna with PEC Reflector

Directional helix antenna backed by a perfect ground plane.

A directional radiation pattern is obtained pointing towards the helix axis as can be expected since the helix size (diameter and number of turns) was set according to the theoretical helix formula.

The input impedance shows that the helix is practically a resonant antenna having 300 Ohm as radiation resistance (input reactance is almost zero).

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