Fan dipole radiation pattern

2018-11-13 23:14:32

I'm looking at dual band (2 m & 70 cm) antenna designs for my next project. A very interesting one to me is the Mighty Woof, which is essentially a fan dipole made of copper pipe.

Would the extra elements in this antenna affect the radiation pattern at all, or should it have essentially the same pattern as a regular dipole?

Basically, fan dipoles should have similar patterns, as only one dipole is resonant at a time.

However, individual dipoles in any arrangement where they all share a common feedpoint should be spaced far enough apart from each other so as to minimize the interaction between them. Whether the design that you mention has them far enough apart would have to be determined by modeling.

Note that in this case, they are nearly harmonically related (3*146.6=440).

  • Basically, fan dipoles should have similar patterns, as only one dipole is resonant at a time.

    However, individual dipoles in any arrangement where they all share a common feedpoint should be spaced far enough apart from each other so as to minimize the interaction between them. Whether the design that you mention has them far enough apart would have to be determined by modeling.

    Note that in this case, they are nearly harmonically related (3*146.6=440).

    2018-11-13 23:23:12