The U.S. government recommends that everyone have a disaster kit that includes a weather radio. These radios tune to a ...

Parabolic reflectors are pretty handy devices. Whether you’re building a microwave antenna or a long-distance directional microphone, suitable commercial dishes aren’t that hard to come by.

There are better ways to build a radio telescope in your back yard, but the thought of having a gigantic parabolic dish out back, peering into the heavens, has stuck with me. I’ve even designed ...

Also called a "dish" or "mirror," parabolic antennas are used for satellite signals and planetary telescopes. The reflective mirror design can also emit energy such as in a flashlight or ...

We can replace the solid surface of a large dish by a set of small dishes positioned along the parabolic surface as in Figure 2. Each small dish brings radio waves to a focus and converts them to ...

We can replace the solid surface of a large dish by a set of small dishes positioned along the parabolic surface as in Figure 2. Each small dish brings radio waves to a focus and converts them to ...