How the height affects the antenna

After the third article, I decided to perform more general work and calculate the same antenna on the different height. In a nutshell, the antenna parameters depend on the height the antenna is placed at. I stored some number of pictures, looking at which worse thousands of words.

The antenna is a quarter-wave GP with two radials. I know that the number of radials does matter, but this is very quick, thus not very thorough exercise. The antenna is made of aluminum pipe (R=10 mm, 3/8 inches), counterpoises are an aluminum wire (R=0.8 mm). The antenna was designed to be mounted on the 1 meter (3 feet) tall mast.

Ground plane height and overall efectiveness

In my previous post, I have shown the Ground Plane antenna for 80 meters. It was designed to use the 16.5 meters tall mast. There on the market higher masts do exist. For example, it's not a problem to buy 19.2 meters semi-telescopic aluminum mast. I changed the model to see how big is the difference between the two antennas built on 16.5 and 19.2 meters tall masts.

Ground Plane for 80 meters without tuner.

Being a HAM for years I always thought of an efficient antenna. My current goal is to make the effective antenna for 80 meters so that I could spend long winter evenings on listening to DXes. I'm living in a private house in the heart of the big city and not able to hang out wire antennas at enough height. Although my experiments with ground standing masts and wire antennas have shown me some positive result I decided to build the one-band GP.