Category: Radio Technical

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RF Energy Exposure

Are you concerned that your Wi-Fi router is causing cancer? Worried that your smart electric meter is giving you headaches? There is a lot of pseudoscience, crazy theories, and false information out there when...

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Handheld Power Obsession

Or, also known as “linear units in a logarithmic world”. Among the cheap handheld radio community, especially after the release of the Baofeng BF-F8HP, there seems to be this huge obsession with RF transmit...

2-FSK 0

Frequency Shift Keying (FSK)

Almost everyone has heard of FM, but not everyone has heard of FSK. Frequency Shift Keying is a modulation scheme which utilizes changes in the frequency of the carrier wave to communicate data. For...

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Why 50 ohms?

Coaxial cables, antennas, amplifier inputs and outputs, typically have either a 50 ohm or 75 ohm characteristic impedance. Why? It all comes down to the characteristic impedance value for maximum power transfer being 30...

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Baofeng UV-5R+ Harmonics

It seems that the ARRL and a number of individuals have been taking a serious look at harmonics and other spurious emissions from various ham transceivers, including the ubiquitous Baofeng range of handheld transceivers....

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Antenna Field Regions

Antenna radiation is made up of several different regions. The transitions between these regions are not distinct and changes between them are gradual. The reactive near-field region is the region close to the antenna....

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