Broadside Array -- Stacked Dipoles
Free Space
28.5 MHz
2 wires, inches
20   0,-101,-136   0,101,-136   #12
20   0,-101,136    0,101,136    #12
2 sources
10,100,0
29,100,0
0 loads

This simple antenna provides a fair amount of bidirectional gain over a dipole,
without any narrowing of the pattern in azimuth.  This is a big plus for fixed
arrays used for general purpose work.  However, for the lower frequencies the
total height can get excessive if you really try to get the lower dipole off
the ground a ways.  Note the nice match to 50 ohms at each feedpoint, allowing
simple feed using 3/4 wave 75 ohm coax sections, which when joined result
in a single 50 ohm feedpoint.