3 Wired Antenna Build.
 

Hi,
I want to build a new antenna.
The design I have seen is a 3 wired type each side, where the 3 wires join
together at each end.
There are two of these, and the two are centred, and fed with coax.
The one I saw was flat, but understand that they could be in-verted.
I am hoping it is multi-band :)
I would like to find information on this antenna, measurements, and
construction hints.
If anyone can help, could you please advise.

Regards in advance.

Kevin, ZL1KFM.

3 Wired Antenna Build.
 

"Kevin & Natalia" wrote in message
news:1146994748.542651@ftpsrv1...
Hi,
I want to build a new antenna.
The design I have seen is a 3 wired type each side, where the 3 wires join
together at each end.
There are two of these, and the two are centred, and fed with coax.
The one I saw was flat, but understand that they could be in-verted.
I am hoping it is multi-band :)
I would like to find information on this antenna, measurements, and
construction hints.
If anyone can help, could you please advise.

Regards in advance.

Kevin, ZL1KFM.


You appear to be describing a FAN or BOW-TIE DIPOLE.
http://www.hamuniverse.com/multidipole.html

http://www.cebik.com/a10/ant9.html

http://www.99main.com/~w1amf/dipole.PDF

http://www.angelfire.com/nb/ni4l/ni4ldipole.html

gb

3 Wired Antenna Build.
 

The design I have seen is a 3 wired type each side, where the 3 wires join
together at each end.
....[snip]....

Someone mentioned a bowtie, but with just a bit of not-looking-carefully-
enuf, it might be a three-wire folded dipole?

IIRC, put a one-wire (each side) dipole high enuf and its impedance is
about 72 ohms.

Use two wires and get 2x2x72 = 288 ohms (which everyone says matches
300-ohm line).

Use three wires and get 3x3x72 = about 650 ohms, which might be well fed
with open-wire feeders?

I also recall folded dipoles are somewhat more broad-band than single-wire
dipoles. (Because they are effectively "thicker"?)

Brings up another question: can folded-dipoles be good multi-band antennas?

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)