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 ...

Massive MIMO and beamforming are essential technologies enabling 5G's current success and will be critical for achieving 6G's ambitious performance goals and applications. So, you want to create a ...

This passive device lets you steer signal beams for over-the-air wireless test systems. Because it’s designed for antenna, amplifier, and RF system testing, the LBM-7250-4 Lab Brick Butler Matrix lets ...

A novel method using signals of opportunity from low-Earth orbit (LEO) satellites is redefining what’s possible in satellite-based navigation. Researchers have developed a joint pseudo-range and ...

DSA 2 (Deep Space Antenna 2) is used to transmit a musical message into deep space. Credit: ESA The European Space Agency (ESA) has sent a famous piece of classical music deep into space “for aliens” ...

A novel method using signals of opportunity from Low Earth Orbit (LEO) satellites is redefining what’s possible in satellite-based navigation. Researchers have developed a joint pseudo-range and ...

Abstract: Due to variation of High frequency as well as distance between transmitting and receiving stations, it is not always feasible to change the height of wide band HF dipole antenna in order to ...

This passive beamforming topology is not well known but is widely used – a common situation in the RF world. Part 1 was an introduction to the electronic steering of an antenna beam and the Butler ...