Tag: antennas

via the ARRL: FAA Reauthorization Act Language Serves to Exclude Vast Majority of Amateur Radio Towers

Language in the Federal Aviation Administration (FAA) Reauthorization Act of 2018 will exclude all but a small number of Amateur Radio towers from marking requirements. Thanks to action taken in 2017 and 2018 by ARRL, the bill’s original language was amended to the extent that amateur towers, as well as residential towers used for over-the-air TV reception, […]

via the ARRL: Tuning Electrically Short Antennas for Field Operation is Research Topic

An article by two well-known radio amateurs, “Tuning Electrically Short Antennas for Field Operation,” appeared in Microwave Journal. Authored by QEX Editor Kai Siwiak, KE4PT, and award-winning researcher Ulrich Rohde, N1UL, the article points out that both Amateur Radio and military applications exist for 20-W battery-powered radios equipped with whip antennas. “In general, the whip antenna which makes the […]

via HACKADAY: Eavesdropping On Cosmonauts With An SDR

Usually when we hear about someone making contact with astronauts in orbit, it’s an intentional contact between a ham on the ground and one of the licensed radio amateurs on the ISS. We don’t often see someone lucky enough to snag a conversation between ground controllers and a spacecraft en route to the ISS like this. For […]

via HACKADAY: Justin McAllister’s Simple, Post-Apocalypse-Friendly Antennas

Watch Justin McAllister’s presentation on simple antennas suitable for a zombie apocalypse and two things will happen: you’ll be reminded that everything antennas do is amazing, and their reputation for being a black magic art will fade dramatically. Justin really knows his stuff; there is no dangle-a-wire-and-hope-for-the-best in his examples. He demonstrates that it’s possible to communicate […]

via HACKADAY: No Moving Parts: Phased Array Antennas Move While Standing Still

If you watch old science fiction or military movies — or if you were alive back in the 1960s — you probably know the cliche for a radar antenna is a spinning dish. Although the very first radar antennas were made from wire, as radar sets moved higher in frequency, antennas got smaller and rotating […]

via HACKADAY: Manhole Covers Hide Antennas

5G is gearing up to be the most extensive implementation of mesh networking ever, and that could mean antennas will not need to broadcast for miles, just far enough to reach some devices. That unsightly cell infrastructure stuck on water towers and church steeples could soon be hidden under low-profile hunks of metal we are […]

PODCAST: This Week in Amateur Radio #1023

This Week in Amateur Radio #1023 Release Date: October 6, 2018 Here is a summary of the news trending this week. This week’s edition is anchored by: Chris Perrine, KB2FAF, Don Hulick, K2ATJ, Amy Jo Clarke, Fred Fitte, NF2F, George W2XBS, and Jessica Bowen, KC2VWX. Produced and edited by W2XBS. Running Time: 1:19:58 Download here: […]

via HACKADAY: Antennas That You Install With A Spray-Can

With the explosion in cell phones, WiFi, Bluetooth, and other radio technologies, the demand for antennas is increasing. Everything is getting smaller and even wearable, so traditional antennas are less practical than ever. You’ve probably seen PCB antennas on things like ESP8266s, but Drexel University researchers are now studying using titanium carbide — known as […]

via HACKADAY: The Biggest Corner Antenna We’ve Ever Seen

Radio waves are received on antennas, for which when the signal in question comes over a long distance a big reflector is needed. When the reception distance is literally astronomical, the reflector has to be pretty darn big. [The Thought Emporium] wants to pick up signals from distant satellites, the moon, and hopefully a pulsar. […]

via HACKADAY: Piezomagnetic Trick Shrinks 2.5 GHz Antennas

To a ham radio operator used to “short”-wave antennas with lengths listed in tens of meters, the tiny antennas used in the gigahertz bands barely even register. But if your goal is making radio electronics that’s small enough to swallow, an antenna of a few centimeters is too big. Physics determines plausible antenna sizes, and […]