In rec.radio.amateur.antenna Jeff Liebermann wrote:
On Sun, 27 Dec 2015 18:46:42 -0000, wrote:

I can not think of any antenna that modulates signals.

I talk to my antennas all the time. I only worry when they talk back.

DAM (Direct Antenna Modulation):
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5464640&url=http%3A%2F%2Fie eexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber% 3D5464640
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1339221&url=http%3A%2F%2Fie eexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber% 3D1339221
https://www.google.com/search?q=direct+antenna+modulation

Got plans for one for 40 meters?



--
Jim Pennino

On Sun, 27 Dec 2015 20:15:10 -0000, wrote:

In rec.radio.amateur.antenna Jeff Liebermann wrote:
On Sun, 27 Dec 2015 18:46:42 -0000, wrote:

I can not think of any antenna that modulates signals.

I talk to my antennas all the time. I only worry when they talk back.

DAM (Direct Antenna Modulation):
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5464640&url=http%3A%2F%2Fie eexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber% 3D5464640
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1339221&url=http%3A%2F%2Fie eexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber% 3D1339221
https://www.google.com/search?q=direct+antenna+modulation

Got plans for one for 40 meters?

Of course not. I just wanted to point out that there is such a thing
as an antenna modulator.

Skimming the literature, it seems to be made for very wide band mm
wave communications, not HF. I also don't have much of a clue as to
how it works. I think the ham radio version will need to wait until
the military and governments are done with their testing.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On 27/12/2015 20:33, Jeff Liebermann wrote:


Of course not. I just wanted to point out that there is such a thing
as an antenna modulator.



I can think of one - the wind. A friend uses a VHF vertical. In very
strong winds, his signal is amplitude modulated as the thing gets bent
right over!

Les.