While iPhones can operate on cellular networks, it is better to use their data features on a Wi-Fi network, if one is available. Not only is Wi-Fi data typically faster than cellular data, but it is ...

The Family Radio Service, or FRS, is a system allowing short-range communications between friends and/or family. The system uses frequency modulation, or FM, signals, improving on the older citizen's ...

To use a smaller antenna, we need a higher signal frequency, and that’s what we do when we apply modulation to the signal. Modulation is simply encoding the low frequency signal in the information of ...

I've constructed hundreds of antennae in the past. Bowtie dipole arrays, biquads, parabolic reflector dipoles, straight up yagi, logarithmic yagi, log periodic, heliacal and simple 1/4 whips. So when ...

Lo and behold, the humble yet mighty biquad. The gain figure on one of these things is pretty impressive, you're looking at 8-10 dBi. The double biquad detailed a bit lower is about 2-3 dBi higher. A ...

A very low-tech way to make field recordings. The process I was intending to follow was simple enough. Set up the antenna in the middle of the field, have it transmit some RF, and measure the signal ...

David leads the Hardware team at CNET, covering phones, wearables, laptops, TVs, streaming, future tech and more. We provide helpful, expert reviews, advice and videos on what to buy and how to get ...