Lazy H -- Combination Broadside and Collinear Array
Free Space
28.5 MHz
2 wires, inches
20   0,-207,-136   0,207,-136   #12
20   0,-207,136    0,207,136    #12
2 sources
10,100,0
29,100,0
0 loads

This antenna provides considerable bidirectional gain.  Part of the gain is
achieved by the broadside elements sharpening the pattern in the vertical
plane, and the rest by the collinear elements narrowing the pattern in azimuth.
This antenna can be used down to half the design frequency, assuming a suitable
feed arrangement, with some gain over a dipole still available.