Category: Microwave

via the ARRL: IARU Region 1 Editorial Sounds Clarion Call on Danger VHF/UHF/Microwave Spectrum Grabs

The chair of the International Amateur Radio Union Region 1 (IARU R1) VHF-UHF-µW Committee, Jacques Verleijen, ON4AVJ, has highlighted extant threats to the Amateur Radio spectrum above 30 MHz. In an editorial that heads the latest edition of the IARU R1 VHF-UHF-µW Newsletter, issued on May 29, Verleijen invited all IARU member-societies to consider ways to “promote, […]

via the ARRL: ARRL Asks FCC to Protect Amateur Radio Millimeter-Wave Bands

ARRL has asked the FCC to avoid authorizing developmental technologies in two Amateur Radio bands above 95 GHz that some radio amateurs may not be unaware of. The ARRL commented on May 2 in response to a Notice of Proposed Rule Making and Order (NPRM&O) in ET Docket 18-21, released in February. The so-called “Spectrum Horizons” proceeding seeks to […]

via HACKADAY: Teardown Of An UWB Location Beacon

Outdoor navigation is a problem that can be considered solved for decades or maybe even centuries, depending on the levels of accuracy, speed and accessibility required. Indoor navigation and location, on the other hand, is a relatively new field and we are still figuring it out. Currently there are at least four competing technologies pushed […]

via the ARRL: NTIA Targets Portion of 3.4 GHz Band for Potential Wireless Broadband Use

The National Telecommunications and Information Administration (NTIA) has identified 3450 to 3550 MHz for potential wireless broadband use. Amateur Radio has a secondary allocation of 3300 to 3500 MHz, sharing the spectrum with government radars; the popular “weak-signal” frequency is 3456.1 MHz. The NTIA oversees the use of spectrum by federal government agencies. “America is […]

via the ARRL: VFlorida Weak Signal Society 3.4 GHz Beacon Back on the Air

The Florida Weak Signal Society (FLWSS) reports that its beacon on 3,456.075 MHz is back on the air and invites reports. The FLWSS said all of its beacons, located in EL98 in the Orlando area, are subject to some drift with temperature; each operates independently with its own crystal reference. “We can’t provide individual frequency accuracy, but […]

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 […]

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