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Awhile back I put a post on this website about a window antenna I built and I am still using that antenna. It’s not too complicated, and can be used with or without a loading coil, so it’s good for future experimentation. If you have metal framed windows it’s very easy, but you could also do the same thing with wire.
My sstran3000 is located on a small laminated board on the floor underneath the corner of a desk located right by a front porch window.
A 2.5-foot antenna wire runs straight up to the bottom of the window well, slips underneath the closed window, and is electrically connected to the center at the bottom of the metal window frame, making the entire 6-foot height of the frame part of the antenna, and of course it radiates both indoors and outdoors.
Out on the porch up at the top of the metal frame there were already four screws as part of the window design, so I attached a 2-foot wire to each one and ran them straight up to the underside of the porch ceiling, where cracks between boards allowed adding small “wedges” made from thick twist ties to hold the four antenna wires in place. I view this four element top section as kind of a modified “cage monopole antenna.”
This antenna is a form of “pressure-zone” design, comparing it to the PZM (pressure zone microphone) design, since it’s “in phase” with the flat wall surface.
The range is very strong in all directions and rolls off as one goes uphill, and being in a “bowl” all directions are uphill from here.
I have never found an antenna that radiates uphill.