On another note... I tossed a simulation of your earlier antenna (post #10 of this thread) together, using 4NEC2
Code:
CM
CE
SY AGL=0
GW 100 33 33/2 0 0+AGL -33/2 0 0+AGL #16
GW 101 3 33/2 0 0+AGL 33/2 0 3+AGL #16
GW 102 3 -33/2 0 0+AGL -33/2 0 3+AGL #16
GW 103 16 33/2 0 3+AGL 0.5 0 3+AGL #16
GW 104 16 -33/2 0 3+AGL -0.5 0 3+AGL #16
GW 105 3 0.5 0 3+AGL 0.5 0 6+AGL #16
GW 106 3 -0.5 0 3+AGL -0.5 0 6+AGL #16
GW 201 16 33/2 0 6+AGL 0.5 0 6+AGL #16
GW 202 16 -33/2 0 6+AGL -0.5 0 6+AGL #16
GW 203 3 33/2 0 6+AGL 33/2 0 9+AGL #16
GW 204 3 -33/2 0 6+AGL -33/2 0 9+AGL #16
GW 205 16 33/2 0 9+AGL 0.5 0 9+AGL #16
GW 206 16 -33/2 0 9+AGL -0.5 0 9+AGL #16
GW 207 3 0.5 0 9+AGL 0.5 0 12+AGL #16
GW 208 3 -0.5 0 9+AGL -0.5 0 12+AGL #16
GW 301 16 33/2 0 12+AGL 0.5 0 12+AGL #16
GW 302 16 -33/2 0 12+AGL -0.5 0 12+AGL #16
GW 303 3 33/2 0 12+AGL 33/2 0 15+AGL #16
GW 304 3 -33/2 0 12+AGL -33/2 0 15+AGL #16
GW 305 16 33/2 0 15+AGL 0.5 0 15+AGL #16
GW 306 16 -33/2 0 15+AGL -0.5 0 15+AGL #16
GW 307 3 0.5 0 15+AGL 0.5 0 18+AGL #16
GW 308 3 -0.5 0 15+AGL -0.5 0 18+AGL #16
GW 401 16 33/2 0 18+AGL 0.5 0 18+AGL #16
GW 402 16 -33/2 0 18+AGL -0.5 0 18+AGL #16
GW 403 3 33/2 0 18+AGL 33/2 0 21+AGL #16
GW 404 3 -33/2 0 18+AGL -33/2 0 21+AGL #16
GW 405 16 33/2 0 21+AGL 0.5 0 21+AGL #16
GW 406 16 -33/2 0 21+AGL -0.5 0 21+AGL #16
GW 407 3 0.5 0 21+AGL 0.5 0 24+AGL #16
GW 408 3 -0.5 0 21+AGL -0.5 0 24+AGL #16
GW 501 16 33/2 0 24+AGL 0.5 0 24+AGL #16
GW 502 16 -33/2 0 24+AGL -0.5 0 24+AGL #16
GW 503 3 33/2 0 24+AGL 33/2 0 27+AGL #16
GW 504 3 -33/2 0 24+AGL -33/2 0 27+AGL #16
GW 505 33 33/2 0 27+AGL -33/2 0 27+AGL #16
GS 0 0 0.0254
GE 0
GN -1
EK
EX 0 100 17 0 1 0 0
FR 0 0 0 0 584 0
EN
The impedance is quite high making for a very high SWR.
Also, the pattern does not project front and rear as one would expect a panel antenna to do. Rather it has 4 lobes pointing downward... (see the attached 3DView which is from a perspective below the antenna.)