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How about an example situation where RF steering is commonly used both in ham radio and broadcast radio in the (so called) real world. You have a mountain with an antenna on top, and a town/city in the valley below. A high gain omni-directional antenna on top of the mountain will get no signal to the town/city below as it is pushing the signal out to the horizon, not down below. What do they do to solve this issue? The put two antennas in a colinear configuration (one right above the other in line), and feed them out of phase. They adjust the phasing so the RF is steered down towards the town/city below, hence where the term RF Steering comes from. You are steering the RF in the nearby environment.

Now we take EZNec (or 4Nec2 or whatever modeling program we happen to have) and we model this antenna, both with and without the phasing. The peak angle of radiation with an earth looks the same with both of them.

In one case, (no phasing) people in the town/city cannot pick op said signal, and in the other case (with the phasing) the signal comes in loud and clear. Yet our modeling software shows no change in angle between these two antennas when they are over an earth. So Eddie, why do you think that is?

The DB

<blockquote data-quote="The DB" data-source="post: 661955" data-attributes="member: 21346">How about an example situation where RF steering is commonly used both in ham radio and broadcast radio in the (so called) real world.&nbsp; You have a mountain with an antenna on top, and a town/city in the valley below.&nbsp; A high gain omni-directional antenna on top of the mountain will get no signal to the town/city below as it is pushing the signal out to the horizon, not down below.&nbsp; What do they do to solve this issue?&nbsp; The put two antennas in a colinear configuration (one right above the other in line), and feed them out of phase.&nbsp; They adjust the phasing so the RF is steered down towards the town/city below, hence where the term RF Steering comes from.&nbsp; You are steering the RF in the nearby environment.Now we take EZNec (or 4Nec2 or whatever modeling program we happen to have) and we model this antenna, both with and without the phasing.&nbsp; The peak angle of radiation with an earth looks the same with both of them.In one case, (no phasing) people in the town/city cannot pick op said signal, and in the other case (with the phasing) the signal comes in loud and clear.&nbsp; Yet our modeling software shows no change in angle between these two antennas when they are over an earth.&nbsp; So Eddie, why do you think that is?<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 661955, member: 21346"] How about an example situation where RF steering is commonly used both in ham radio and broadcast radio in the (so called) real world. You have a mountain with an antenna on top, and a town/city in the valley below. A high gain omni-directional antenna on top of the mountain will get no signal to the town/city below as it is pushing the signal out to the horizon, not down below. What do they do to solve this issue? The put two antennas in a colinear configuration (one right above the other in line), and feed them out of phase. They adjust the phasing so the RF is steered down towards the town/city below, hence where the term RF Steering comes from. You are steering the RF in the nearby environment. Now we take EZNec (or 4Nec2 or whatever modeling program we happen to have) and we model this antenna, both with and without the phasing. The peak angle of radiation with an earth looks the same with both of them. In one case, (no phasing) people in the town/city cannot pick op said signal, and in the other case (with the phasing) the signal comes in loud and clear. Yet our modeling software shows no change in angle between these two antennas when they are over an earth. So Eddie, why do you think that is? [COLOR=#000000][URL='http://hittman.us']The DB[/URL][/COLOR] [/QUOTE]

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