Category Archives: RF

RF Modulation: Crash Course For Hackers

When you’re looking to add some wireless functionality to a project, there are no shortage of options. You really don’t need to know much of the technical details to make use of the more well-documented modules, especially if you just need to get something working quickly. On the other hand, …read more

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Posted in ask, FSK, Hackaday Columns, LoRa, modulation, OOK, radio hacks, RF, wireless, Wireless Module | Leave a comment

Mr. Carlson Gets Zapped by Snow

As a Canadian, [Mr. Carlson] knows a thing or two about extreme winter weather. Chances are good, though, that he never thought he’d get zapped with high voltage generated by falling snow.

[Mr. Carlson]’s shocking tale began with a quiet evening in his jam-packed lab as a snowstorm raged outside. …read more

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Posted in arc, discharge, high voltage, misc hacks, radio, RF, snow, statis, triboelectric, weather | Leave a comment

Full Duplex Radio Claimed Easier with Analog Module

There’s an old saying that we have one mouth and two ears so you can listen twice as much as you talk. However, talking and listening at the same time is fairly difficult and doing it with radio signals is especially hard. A company called Kumu Networks has an analog …read more

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Posted in diplexer, duplexer, noise cancellation, RF, wireless hacks | Leave a comment

Fail of the Week: Ambitious Vector Network Analyzer Fails To Deliver

If you’re going to fail, you might as well fail ambitiously. A complex project with a lot of subsystems has a greater chance of at least partial success, as well as providing valuable lessons in what not to do next time. At least that’s the lemonade [Josh Johnson] made from …read more

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Posted in AD8302, Fail of the Week, filter, fotw, harmonics, RF, thesis, vector network analyzer, vna | Leave a comment

Weird World of Microwaves Hack Chat

Join us on Wednesday, December 18 at noon Pacific for the Weird World of Microwaves Hack Chat with Shahriar Shahramian! We’ve been following him on The Signal Path for years and are excited to pick his brain on what is often considered one of the dark arts of electronics.

No

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Posted in antenna, ASIC, combiner, feedline, Hackaday Columns, microwaves, mixer, rat-race, RF, The Hack Chat, The Signal Path, waveguides | Leave a comment

Hackaday Superconference: An Analog Engineer Dives Into RF

Those of us who work with electronics will usually come to the art through a particular avenue that we master while imbibing what we need from those around it. For example, an interest in audio circuitry may branch into DSP and microcontrollers as projects become more complex. Some realms though …read more

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Posted in 2019 Hackaday Superconference, cons, radio, radio hacks, RF | Leave a comment

Raspberry Pi 4 HDMI is Jamming Its Own WiFi

Making upgrades to a popular product line might sound like a good idea, but adding bigger/better/faster parts to an existing product can cause unforeseen problems. For example, dropping a more powerful engine in an existing car platform might seem to work at first until people start reporting that the increased …read more

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Posted in hdmi, interference, news, radio frequency, Raspberry Pi, resolution, RF, wifi | Leave a comment

Side-Channel Attack Shows Vulnerabilities of Cryptocurrency Wallets

What’s in your crypto wallet? The simple answer should be fat stacks of Bitcoin or Ethereum and little more. But if you use a hardware cryptocurrency wallet, you may be carrying around a bit fat vulnerability, too.

At the 35C3 conference last year, [Thomas Roth], [Josh Datko], and [Dmitry Nedospasov] …read more

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Posted in cryptocurrency, exploit, HackRF, machine learning, RF, SCA, sdr, side channel attack, tensorflow, wallet | Leave a comment

Complex Impedences Without The Pain

Any grizzled electronic engineer will tell you that RF work is hard. Maintaining impedance matching may be a case of cutting wires to length at lower frequencies, but into the low centimetre and millimetre wavelengths it becomes a Dark Art aided by mysterious and hugely expensive test equipment beyond …read more

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Posted in complex impedance, impedance, radio hacks, RF, vna | Leave a comment

Antenna Tuning For GHz Frequencies

Antenna tuning at HF frequencies is something that radio amateurs learn as part of their licence exam, and then hone over their time operating. A few basic instruments and an LC network antenna tuner in a box are all that is required, and everything from a bit of wet string …read more

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Posted in antenna, ghz, matching, news, radio hacks, RF, vna | Leave a comment