Radiation from an antenna
There are lots of questions about radiation from antennas or wires specifically. It is not well understood by many amateurs. There are several ways to try and explain it without using high level math. There are also many variables for any particular installation. However, regardless of the installation, radiation is caused by and is proportional to the current on the wire. I and other engineers use the term Meter—amperes. To try and simplify a complex topic, it is the integral of rms current over the length of the wire. Another way is to say it is that its the area under a plot of rms current against distance along the antenna. If you look at a plot of current on a halfwave wire, regardless of where it’s fed, you see a current minimum at the two ends ( high impedance points) and a maximum in the center ( low impedance point). Most of the radiation is from that center part where the standing wave ( not to be confused with the standing wave on a transmission...