For an extended band frequency, where a 3 meter antenna is about 6 degrees, what is the angle for the peak of the lobe for the radiation pattern?
From figure 3 in http://www.km5kg.com/halfwave.htm it looks like the angle changes as the electrical length of the antenna changes. However I have not seen any modeling that goes as low as 6 degrees.
I wonder if the angle of the radiation has something to do with the discussion of mounting height in another thread.
Good question, stvcmty !
All vertical monopoles of all electrical heights of 5/8-wavelength (225 degrees) and less radiate/launch maximum relative field [E/E(max)] in the horizontal plane.
"Takeoff Angle" refers to the maximum field of the received skywave radiation that was originally launched by that antenna that survives at an infinite distance over a flat, real-earth (non-perfect) ground plane.
This is an inappropriate measure for evaluating Part 15 AM systems, as the only useful radiation receivable from such systems is via the surface, or ground wave -- which was not included in those "takeoff angle" evaluations.