As 6G trials accelerate and regulators finalize additional mid-band allocations, the dominant question facing RF engineers is no longer “Can Sub-6 GHz deliver coverage?” but “How do we maintain spectral efficiency and linearity when Sub-6 GHz must coexist with dense 5G-Advanced and early 6G waveforms in the same 3–7 GHz Continue Reading
Silent Signals: How the USAF HFGCS Connects the Skies
From silent skies to encrypted commands, the U.S. Air Force’s High Frequency Global Communications System (HFGCS) keeps aircraft connected across the globe—no matter how far they fly or what threats emerge. While today’s military leans heavily on satellites and digital networks, one system continues to earn trust when absolute reliability Continue Reading