View Single Post
  #20   Report Post  
Posted to sci.electronics.repair
[email protected] tnom@mucks.net is offline
external usenet poster
 
Posts: 903
Default One more antenna question: Antenna pitch?

On Tue, 01 Dec 2009 02:46:53 -0500, mm
wrote:

One more antenna question: Antenna pitch?

That is, my attic has a pitched roof and the antenna for channels 7 to
60 that I'm thinking of now is almost 13 feet long.

It would fit more easily in the attic if I pointed it down a little
bit just like the roof pitches down from the center. Does the angle
of the axis matter that much if the individual elements are all
horizontal?

After all, if the tranmitter is higher than the antenna, it's as if
even a horizontal antenna is pointed down, from the pov of the
transmitter.

I've been reading but nothing has addressed this. All outdoor
antennas are of course horizontal, and I don't get to see people's
indoor antennas.


A small amount of tilt won't make a significant difference. Those that
suggest tilting the antenna will increase the gain are misguided. The
antenna can take advantage of ground reflection up to a theoretical
6db of gain. This gain is seldom reached but the in phase reflected e
field that causes this gain is best achieved when the antenna is
horizontal.