"Art Unwin" wrote in message
...
A sloper antenna when resonant produces more gain
than a vertical dipole resonant at the same frequency.
True or false? prove it

Model parameters for sloping dipole: 60 ft at one end
13.3 ft at the other (45 deg slope). Horizontal dipole
at 60 ft. Length of both antennas 66 ft. Sloping dipole
resonant at 7.225 MHz, same length horizontal 7.3 MHz.
Average ground parameters: conductivity 5 mS/m, and
relative permittivity 13. Horizontal dipole maximum
gain off the sides (As expected). Sloping antenna
double lobed pattern with maximum gain at 80 degrees
either side of lowest end. Softwa Nittany's GNEC.

Simulation results:

EL. angle Sloping dipole Horizontal dipole
(deg.) Gain (dbi) Gain (dbi)
10 -1.5 +1.2
20 +1.4 +6
30 +2.4 +7
40 +2.7 +6.4
50 +2.7 +4.7
70 +2 -0.6
90 +1.5 -3.5

73, Frank