The magnetic loop antenna is a familiar sight in radio amateur circles as a means to pack a high performance HF antenna into ...

Global carbon dioxide emissions from fossil fuels hit a record 38 billion tons last year, putting the world’s most ambitious ...

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 ...

I using the portable install and I get "Invalid credentials in Authorization header" errors when the script tries to auto download depth v2 so I'm trying the manual instructions and I'm not having ...

Guelph, ON /PRNewswire/ - Valcom Antennas (Valcom Manufacturing Group Inc.) is proud to announce its participation in the Polar Over-the-Horizon Radar (P-OTHR) project in collaboration with ATCO ...

Abstract: A mechanically-tuned electrically small loop antenna for HF use is proposed. The antenna is composed of a tuned outer loop that is inductively coupled to a smaller coaxial loop. Measurements ...

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 ...

Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, China ...