On 12 Feb, 05:02, "AndyS" wrote:
Andy writes;

I know I could go to my EZNEC and find this out for myself,
but I figure someone here has already done this and a quick
answer is all I need..

In "normal" Yagi antennae, the elements are parallel
and at 90 degrees to the mounting boom.

In some TV antennae, the elements are at an angle to the
mounting boom, slanted in the direction of the station being
received. Otherwise, they look pretty much like a Yagi.

My question is, what effect does "slanting" the elements
forward have on the impedance, and the pattern ?

[ [ [ [ [ [

Normal Yagi Slanted Yagi

Thanks in advance for the meaningful answers..

Andy W4OAH

Very true, a yagi is a planar antenna i.e on a single plane whereas
only one element is resonant and where ALL others are parasitic. This
also holds true for a log periodic except the frequency is a variable
which selects the element closest to resonance for the theoretical
feed point i.e. of matching impedance to the feed point impedance. The
point about just one element that is resonant is the reason in my mind
that antenna advancement
has been retarded over the last hundred years excabated by the design
of the yagi which is really an empirical design that denies the
simplicity of normal radiation and its corresponding mathematics. Now
I know somebody will immediately jump to the dual driven element forms
but that is beside the point under discussion.
Art