Well....
I could have stated a less controversial design I guess.
Such as an antiresonate antenna cap--folded from aluminum foil, and intended
to cancel out the moon bounced mind control rays from the aliens.
Since totally shielding the walls of my home with silver foil has failed to
block the penetration of these "antenna rays" into my home, the cap might be
just the ticket!
The burning question here would be what wavelength of foil the cap should it
be folded from, and heck, I don't even think the frequency of their mind
control rays registers on earth meters!
It is a conspiracy, I TELL YA!!! grin

Regards
"John Smith" wrote in message
...
My question(s):

For an example, on the 10 meter band:
If I take a 28" whip and mount it at the end of helical wound coil (wound
on
1" diameter form), where the "wire length" of the coil, PLUS, the length
of
the whip (28" + coil wire length) is equal to 1/2 wavelength (electrical
length)--BUT, the overall physical length of the antenna (top, tip of whip
to base of helical wound coil) is 1/4 wavelength, what would the radiation
pattern of such an antenna be?

Would it favor the pattern of a 1/4 or 1/2 wave antenna--or, would the
pattern be a compromise between the two--or, would the pattern be totally
unrelated to either?

What could I expect the impedance of such an antenna be? Would the
reactance be capacitive or inductive? What would be the best way to
provide
a match to 50 ohm coax from such an antenna?

What software is available to model such an antenna?

Thanks in advance,
warmest regards