I've been toying with this idea for awhile ... for apartment dwellers with balconies.
Loop antenna made from 5/8 refrigeration copper (soft bendable). The length would be the same @ about 3 meters, makes it about 3' dia. The PVC wire wound loading coil would be mounted between the ends with an inline tuning stylus device, connected to one end ... the other end isolated by PVC fittings on that end.
The TX connection end bracketed to the TX box and the whole thing hung from a balcony. Could even use a iron railing (if the balcony has one) as counterpoise. Put a small hanging flower basket in the middle and you have a balcony garden piece ... no one will know what it is unless they inspect it close-up and recognize it.
I think you could build the project for $50 or less if you're a good scrounger.
Yeah, I'm not sure what Talking House bases that info on. I suppose just because glass passes visible light doesn't mean it passes all forms of energy.
But, I do remember experimenting with microwave using a glass lens to focus the wave front. Seemed to work quite well.
Just had to throw a bad pun or two in there.
Glass is both a solid and a liquid made of several materials depending on what type of glass is being manufactured.
The most common and perhaps the oldest way of creating glass is sand or rather the silica found in sand. If you have ever been on the beach and noticed the glimmering in the sand that more than likely is silica a form of natural occurring silicone.
You can see it if you hold sand in your hand, it looks like tiny smooth cubes of glass. That was and probably still to this day was used to create panes of glass. Melted, blown or flattened and cooled into a pane of glass you can see through. Will radio waves pass through it, of course they will. The only time radio waves may not pass through glass or be hindered is when a metallic based material is added to the molten glass. Some hospitals, prisons and courtrooms have a type of safety glass with a wire mesh embedded in the glass meant to slow down a would be attacker. This glass could make reception difficult but only if it was on the windows along an outside wall. Usually this type of glass is only found on doors.
Since lead is a major no-no these days, i doubt there are many buildings or homes that still contain lead in the windows even if they do i doubt it would be enough to slow radio waves.
And let's not forget, light, light is indeed a wavelength.
I don't know where Talking House got that information but they were fed a load of bull.
And that my friends is today's lesson in Glass 101 . lol