Aside from the wok, which serves as the main reflector, you’ll need a bit of coaxial cable and some stiff copper wire to fashion a small dipole antenna ... 1420-MHz hydrogen line signal, which ...

Foil-lined foam insulation board, scraps of lumber, and a paint-thinner can ... antenna is then piped into an inexpensive low-noise amplifier (LNA) specifically designed for the hydrogen line ...

If I ask you to picture a radio telescope, you probably imagine a large dish pointing to the sky, or even an array of dish antennas ... the hydrogen emission line is sometimes called the 21 ...

A 19.8 kW PV system is powering a telecommunications antenna at a French air control center. When it produces more energy than needed, the surplus is used to produce hydrogen which is then ...