Espectro de Rádio

Earth’s Magnetic Whispers

Spacecraft have recorded 'chirping' radio emissions far from Earth’s surface — a discovery that rewrites where and how magnetospheric waves form and raises fresh questions about s… Fev 07, 2026

Technology

China’s Smart Surface Aims to Turn Radar into Aircraft Power

A paper from Xidian University describes a reconfigurable metasurface that can switch between scattering and radiation modes and harvest ambient radar energy—an advance that could… Jan 05, 2026

Science

Secret SpaceX Satellites Emitting Wrong‑Way Signals

An amateur astronomer discovered that a fleet of classified SpaceX satellites is transmitting on uplink frequencies normally reserved for ground stations, raising questions about … Nov 21, 2025

espectro de rádio

Articles about espectro de rádio

Earth’s Magnetic Whispers

China’s Smart Surface Aims to Turn Radar into Aircraft Power

Secret SpaceX Satellites Emitting Wrong‑Way Signals