IEEE Spectrum on MSN

Chilean telescope array gets 145 new powerful amplifiers

Thanks to the Fraunhofer Institute for Applied Solid State Physics (IAF) and the Max Planck Institute for Radio Astronomy, ...
IEEE

Active Calibration Approach Addressing Antenna Mutual Coupling and Power Amplifier Output Mismatch in Fully Digital MIMO Transmitters

Abstract: This article introduces an active calibration scheme tailored for fully digital multiple-input multiple-output (MIMO) transmitters, a key step toward ensuring channel reciprocity. The ...
IEEE

Low Sidelobe Level, High-Gain Patch Antennas Operating at Higher-Order Modes

Abstract: High-gain patch antennas with low sidelobes are proposed in this article. First, the patch antennas are operating at higher-order modes to realize a larger electrical size and higher ...