Anyone use this type of OTA TV antenna?
This antenna seems to be something that Roadtrek uses. It is similar to a Jack antenna where it doesn't need to be raised or lowered, but it is omnidirectional, so one doesn't even need to turn a kno...
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I notice they do not give a range in typical use.
Generally Omni directional antennas are not the best choice, they suffer big time from multipath reception which can really mess up a digital signal, and relative low gain.
What is gain in this case and where does it come from.. This is not precidse but illistrative.
Take a common necklace chain (Remove pendent if any) a penny and some toothpicks and a pencil.
Oh, and a paper map.
Place the penny in the center of the map (on a table) and arrainge the necklace so the chain is a circle, concentric with the penny, around it. This is the range of an OMNI (Ideal Omni at that)
Now remove the penny and lay the penil in it's place, Pull the chain perpenducular to the pencil (So the pencil lies on the short axis of an oval) and that's your range with a dipole antenna like the batwing. See how much farther out it goes.
Now lay a few toothpicks on one side of the pencil like this
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Pull the chain back into it's original circle and move it so on the LEFT (As pictured) side of the pencil it's about half as far away as it was with the penny,,, Now pull the RIGHT side out as you did before till the sides (Top and bottom in the diagram) nearly touch the ends of the pencil.
That's the added WINGMAN
Now .. Install the Sensar Pro (Double the length of the chain).
As I said, this is not precise, or even to scale, but it is illistrative.
Generally Omni directional antennas are not the best choice, they suffer big time from multipath reception which can really mess up a digital signal, and relative low gain.
What is gain in this case and where does it come from.. This is not precidse but illistrative.
Take a common necklace chain (Remove pendent if any) a penny and some toothpicks and a pencil.
Oh, and a paper map.
Place the penny in the center of the map (on a table) and arrainge the necklace so the chain is a circle, concentric with the penny, around it. This is the range of an OMNI (Ideal Omni at that)
Now remove the penny and lay the penil in it's place, Pull the chain perpenducular to the pencil (So the pencil lies on the short axis of an oval) and that's your range with a dipole antenna like the batwing. See how much farther out it goes.
Now lay a few toothpicks on one side of the pencil like this
|
| | | |
|
Pull the chain back into it's original circle and move it so on the LEFT (As pictured) side of the pencil it's about half as far away as it was with the penny,,, Now pull the RIGHT side out as you did before till the sides (Top and bottom in the diagram) nearly touch the ends of the pencil.
That's the added WINGMAN
Now .. Install the Sensar Pro (Double the length of the chain).
As I said, this is not precise, or even to scale, but it is illistrative.
