Collaborate Disseminate
The basic principle of radar systems is simple enough: send a radio signal out, and measure the time it takes for a reflection to return. Given the abundant sources of …read more Continue reading Using a Scientific Satellite for Passive Radar
If you own a handheld transceiver of any type then the chances are it will come with a “rubber duck” style antenna. These flexible rubber-coated antennas are a compromise in …read more Continue reading All Handheld Antennas Are Not Born The Same
Looking up at the sky just after sunset or just before sunrise will reveal a fairly staggering amount of satellites orbiting overhead, from tiny cubesats to the International Space Station. …read more Continue reading Building a Low-Cost Satellite Tracker
The magnetic loop antenna is a familiar sight in radio amateur circles as a means to pack a high performance HF antenna into a small space. It takes the form …read more Continue reading Cheap VHF Antenna? Can Do!
Using digital techniques has caused a resurgence of interest in VLF — very low frequency — radio. Thanks to software-defined radio, you no longer need huge coils. However, you still …read more Continue reading Optimizing VLF Antennas
For as mysterious, fascinating, and beautiful as lightning is at a distance, it’s not exactly a peaceful phenomenon up close. Not many things are built to withstand millions of volts …read more Continue reading Neon Lamp Detects Lightning Strikes
The ARRL used to have a requirement that any antenna advertised in their publications had to have real-world measurements accompanying it, to back up any claims of extravagant performance. I’m …read more Continue reading Field Testing An Antenna, Using A Field
Metalized Mylar “space blankets” are sold as a survivalist’s accessory, primarily due to their propensity for reflecting heat. They’re pretty cheap, and [HamJazz] has performed some experiments on their RF …read more Continue reading Mylar Space Blankets As RF Reflectors
We’ve seen tons of projects lately using the ESP32-C3, and for good reason. The microcontroller has a lot to offer, and the current crop of tiny dev boards sporting it …read more Continue reading Simple Antenna Makes for Better ESP32-C3 WiFi
When your homebrew Yagi antenna only sort-of works, or when your WiFi cantenna seems moody on rainy days, we can assure you: it is not only you. You can stop …read more Continue reading A Hacker’s Approach to All Things Antenna