zer0

📡 RF hardware and practical radio engineering. Filters, LNAs, bias tees and tools for SDR and wireless systems.
Sharing RF tips and lessons from real hardware.

[zer0 @hellogpio]

⚖️ Selectivity & sensitivity are in tension. A narrow filter rejects out-of-band signals but is vulnerable to frequency drift. A wider one tolerates drift but lets more interference through. The right bandwidth depends on hardware stability, environment & interference.

[zer0 @hellogpio]

Your City’s Cell Towers Could Soon Track Every Drone in the Sky.

Each base station in a cellular network sees a drone's Doppler shift from a different angle. Solve enough of those equations simultaneously and you get a precise 3D position fix, for free.

https://t.co/lXW7dokW1k

[zer0 @hellogpio]

@bloggersarvesh Seo

[zer0 @hellogpio]

@mrjackychou Letter

[CaribouLabs.co @cariboulabs]

CaribouLite Software-defined Radio SDR - a design review https://t.co/56UnnJ3IVJ

Thank you #OneSDR for the post and a Design Review! We appreciate it.

[RAKwireless @RAKwireless]

We agree with OneSDR: Time is #HNT. In this blog, they share how @getmntd_’s delivery and customer support sets it apart from other #Helium miners. MNTD. ships directly to you. No time like right away to connect to #ThePeoplesNetwork.

Read more here: https://t.co/3px7xrJu4o

[RAKwireless @RAKwireless]

In this blog, OneSDR mentions the #RAK 5.8 dBi & 8dBi Fiberglass Antenna as a potential solution for maximizing coverage of your #RAK Hotspot Miner & improve your earnings.

Discover more about how to orchestrate an effective miner setup here: https://t.co/WabBTf5YAe

[zer0 @hellogpio]

https://t.co/KDMoHtzjyb

[Tindie Maker Marketplace @tindie]

#NEW ADS-B Filtered LNA 978 MHz + 1090 MHz Dual Band https://t.co/zYWUXkzdbx #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW Low Noise Amplifier 4GHz, 20dB Gain, 0.65dB NF https://t.co/pMYScmhVBF #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW 169 MHz Bandpass Filter for ISM band https://t.co/POFMyvDlwk #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW 144 MHz RF Filter; 144-148 MHz; Bandpass Filter https://t.co/yeEFS8Zxdx #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW Low Noise Amplifier 10-4000MHz Wide 3.6V-24V https://t.co/wErRaQthOU #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW 315 MHz Bandpass Filter with 500 kHz Bandwidth https://t.co/Sxs19RfkPk #DIY-Wireless

[rtl-sdr.com @rtlsdrblog]

How to Not Break Your SDR + Other Articles from oneSDR https://t.co/Bfmw6NHzye

[Tindie Maker Marketplace @tindie]

#NEW 2.45 GHz 2450MHz Bandpass filter; 2 Watt / +33 dBm https://t.co/IcNdQWpnf2 #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW FM Notch Filter 88-108MHz in Enclosure https://t.co/8kPZjo0apY #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW 433 MHz Filtered Low Noise Amplifier LNA G=40dB https://t.co/okA0aghDQk #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW AIS Receive Band Pass Filter 162MHz with Enclosure https://t.co/53IXnBcvss #DIY-Wireless

[Tindie Maker Marketplace @tindie]

#NEW 869 MHz Dual Filtered Amplifier LNA 30 dB gain https://t.co/P8kyE0zYbc #DIY-Wireless