"Ross Anderson" wrote in message
oups.com...
In an earlier post
http://groups-beta.google.com/group/...0469fb25ccbc17
I asked if anyone could identify this antenna
http://home.comcast.net/~ross_anders...ionAntenna.htm .
Mike, NZ4K, suggested I look at this site
http://www.starkelectronic.com/wing4.htm .
A close match is the Winegard CA-8098.
This is a fascinating antenna (the VHF part), consisting of two booms
coming together in a V, with the elements attached to the boom off
center, and the elements on the upper boom placed asymmetrically with
respect to the elements on the lower boom.
Now my question is: Has anyone seen this type of antenna written up in
any journal, conference proceedings, book, patent, web page, or message
board; or is anyone willing to share their thoughts or unpublished work
on this type of antenna?
Thanks, Ross W1HBQ


Ross

I've tried to build antennas with this "technology" back in the 1960s. I
couldnt give you any specific referance to where design data is available.
But, it might be interesting to you to note that the stations being received
are in the direction that the Big V is pointed.
The fundamental concept is to feed the "Big V" at its "pointed end".
Then, the radiating elements get increasingly longer as the feed line
spreads. When the elements are about right for radiation at the frequency
of interest, the majorty of the signal is either radiated or received. In
addition, each succeeding element is reversed in phase. Since the VP of the
transmission line is about the same as velocity of the radiated wave from
the previous element, a Null is created in that direction (away from the
pointed end).

When I learned about the LPV antenna, I considered it to be more practical
for the TV frequencies. They work with elements 1/2 wave long and when the
elements are 3/2 wave long. That works quite well with TV frequencies.

I'd bet you can get the attention of some "real" antenna designers in this
news group to explain the Log Periodic Antenna design. I was never a
really good antenna designer and havent worked in antennas since 1969.

Jerry