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2

Engineer999. While it might seem like a good idea to connect your antenna to the building ground wire, my experience has been that for those vertical antennas which are designed to operate without radials it makes little or no difference what the ground is connected to. You also should consider that if you are in a multi-tenanted building where you aren't ...


2

It may be great, it may not... that's definitely an empirical question due to the many factors: how much of the xmit current on the ground leg will be parallel and next to your vertical? this could cause destructive interference and make the antenna pattern more directional. are there other currents on the ground that will make their way into your antenna ...


5

That is a great idea. In fact antennas of this design are quite common, and you probably have a much smaller antenna of similar construction on your Wi-Fi router: Effectively, the lower dipole element, which is a tube, forms a "bazooka" or "sleeve" balun. See also W8JI's description of sleeve baluns. I'll let you follow the links for ...


0

If a feedline isn't centered in a balanced antenna's near field, it can couple into the EM near field, pick up induced currents, and thus distort the pattern. If you feed the feedline into a quarter wave length pipe segment of a half wave dipole, the end exit of that pipe will be a very high voltage node at resonance that can capacitively couple to the feed ...


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"RF ground" usually means "something that is at the same potential as the soil". This is important because if you have a wire (such as your feedline, for example) which is not at ground potential, then there exists a non-zero electromagnetic field between that wire and the soil. That means the feedline is radiating/receiving, which is ...


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