Santa Net is an annual December event where licensed amateur radio operators use RF and EchoLink technology to connect children with Santa Claus on the airwaves.

ABSTRACT: On 25 October 2013, the Sun emitted two significant solar flares. The first solar flare, classified X1.7, peaked at 08:01 UT. The second one, X2.1, peaked at 15:03 UT and was accompanied by ...

6 Best HF Antennas for 2025 to Boost Your Ham Radio Signal Anywhere Links to the best HF Antennas are listed down below: 6. Moonraker Ltd GPA-80 5. DX Engineering XB-5 Hexx Beam HF Antenna 4. Foul ...

ABSTRACT: This note describes optimally matching the seminal Fano Load using Central Force Optimization with Negative Gravity. This approach improves the best fitness by more than eighteen percent and ...

A misaligned antenna could be the difference between mobile signal or not, that’s why Vodafone is using satellites to guarantee positioning. Vodafone will begin rolling out satellite-guided sensors ...

SiTime’s Symphonic is a mobile clock generator built around the SiT30100, which integrates a MEMS resonator and a temperature sensor in a compact 2.22 mm² chip. Designed for 5G and GNSS chipsets, ...

Waveform is a US-based company that sells cellular-related equipment and also manufactures some of its own, including cellular antennas. Most of Waveform's antennas are designed for stationary/fixed ...

Raspberry Pi Zero 2 W-based 3-antenna switch for HF (100W), controlled via Flask. Uses ANMBEST 4-channel relay (active HIGH), Freenove Breakout Board HAT, and SO-239s in a DXE-UE-2P box with Alpha ...

Abstract: The working band of the airborne HF antennas is 2-30MHz (wavelength 10-150m), which can communicate over long distances. Limited by antenna size, airborne HF antennas have the disadvantages ...

Abstract: Research on miniaturization of HF antennas is one of the hot research areas. A novel miniaturized broadband HF antenna whose largest size is only 3.6m is presented in this paper. Simulated ...