Category: Microwave

via the ARRL: Microwavers Report Successful US-Canada Contacts on 78 GHz

Microwave enthusiast Mike Seguin, N1JEZ, has reported several successful 78-GHz contacts between the US and Canada on November 9. “We believe these contacts may be the first W/VE on 78 GHz,” Seguin said in a post to several VHF/UHF/microwave-oriented reflectors. “We hope to extend distances before winter sets in here in the Northeast and mountaintop access […]

Meet the Geek Who Tracks Rogue Satellites With Coat Hangers

EVERY 95 MINUTES, the Chinese satellite Zhuhai-1 02 makes a full pass around the planet, its solar-panel arms extending from its boxy body as it observes Earth. Sometimes, its path takes it over Pueblo, Colorado. There, more than 300 miles below, Mike Coletta’s receiving station can pick up Zhuhai’s transmissions. Because as sophisticated as space technology is, the […]

via the ARRL: New 10-GHz Earth-Moon-Earth World Record Set

A new 10-GHz Earth-Moon-Earth (EME or moon bounce) world record has been set. On September 9, Rex Moncur, VK7MO, and Jim Malone, WA3LBI, completed a 18,949.4-kilometer contact using QRA64D. This extends by approximately 600 kilometers the previous world record of 18,337 kilometers held by DL7FJ and ZL1GSG, who used CW. The participants said the key […]

via HACKADAY: Doppler Module Teardown Reveals the Weird World of Microwave Electronics

Oscillators with components that aren’t electrically connected to anything? PCB traces that function as passive components based solely on their shape? Slots and holes in the board with specific functions? Welcome to the weird and wonderful world of microwave electronics, brought to you through this teardown and analysis of a Doppler microwave transceiver module. We’ve […]

Amateur Radio Poised to Retain Full 76-81 GHz Band, Sharing with Vehicular Radars

In a draft Report and Order (ET Docket No. 15-26) to be considered at its July 13 open meeting, the FCC is proposing to lift a nearly 2-decade-old suspension of Amateur Radio access to 76-77 GHz, giving the Amateur and Amateur-Satellite services access to the full 76-81 GHz band on a secondary basis. The FCC […]

VHF/UHF/Microwave Pioneer Don Hilliard, W0PW, SK

A pioneer on VHF, UHF, and microwave bands, and the designer of a popular Yagi model, Don Hilliard, W0PW (ex-W0EYE), of Clayton, Oklahoma, died on March 25 following a lengthy period of ill health. An ARRL member, he was 81. “Over the decades, Don made numerous contributions to the hobby and specifically in the VHF, […]

via HACKADAY: Put That Amateur Radio License to Use on 915 MHz

Amateur radio enthusiasts in the US will be interested in Faraday, an open-source digital radio that runs on 915 MHz, which amateur radio enthusiasts may know better as the 33 cm band. You can transmit on 915 MHz without a license (in the US), taking advantage of the Industrial, Scientific, and Medical (ISM) exemption. This […]

via the RSGB: New terahertz band NoV

Frequencies above 275 GHz, the terahertz bands, are a new area for experimentation and propagation research. Ofcom have generously enabled low-power NoV access for Full licensees in order to facilitate innovation at the cutting edge of RF technology. The NoV includes a number of conditions related to frequency bands, and protection zones around key UK […]

via HACKADAY: A Lot Of WiFi Power, A Yagi, And A Sniper’s ‘Scope

Do you remember the early days of consumer wireless networking, a time of open access points with default SSIDs, manufacturer default passwords, Pringle can antennas, and wardriving? Fortunately out-of-the-box device security has moved on in the last couple of decades, but there was a time when most WiFi networks were an open book to any […]

via the ARRL: Amateur 47 GHz Allocation Avoids 5G Juggernaut in the US for Now, Worldwide Defense Continues

There’s good news regarding the future of Amateur Radio’s primary allocation at 47 GHz in the US. Still a test bed for point-to-point propagation experimentation by dedicated enthusiasts, the 47-47.2 GHz band is among those under consideration at the next World Radiocommunication Conference in 2019 (WRC-19) to accommodate so-called 5G wireless broadband devices. Early this […]

via HACKADAY: Two Great Radios Taste Great Together

[Johan Kanflo] sent us his latest recipe: a blend of one part RFM69 sub-gigahertz radio transceiver with one part ESP8266 module. The resulting dish looks absolutely delicious! We’re all charmed with the ease of use that the ESP8266 brings to the table — plug it in and you’re talking to your existing WiFi network — […]

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