Nearly 40,000 amateur radio operators (also known as “ham” radio operators) from the United States and Canada will participate in the annual “Field Day” drill, sponsored by ARRL–The National Associati ...

I tested the Mohu Leaf Supreme Pro, one of the biggest indoor antennas you can buy, to see whether the extra size actually ...

With LISA, ESA plans to catch gravitational waves from space, using a triangle of spacecraft millions of kilometers ...

In this paper, the performance of an underlay multiple-input multiple-output (MIMO) cognitive radio system is analytically studied. In particular, the secondary transmitter operates in a spatial ...

New video of crews in Butte upgrading a TV transmitter to UHF, enhancing reception and picture quality for over-the-air ...

Members of the North Florida Amateur Radio Club have given high school robotics teams a blueprint for connecting to the International Space Station with ham radio.

A novel time-division MIMO technology enables phased-array receivers to operate faster with exceptional area efficiency and ...

A hybrid polarization-phase tuning methodology is presented for reflectarray antenna designs. First, three representative phasing approaches for reflectarray designs are briefly reviewed, and it is ...