Images of plants painted on pottery made up to 8,000 years ago may be the earliest example of humans’ mathematical thought, a study has found.

Abstract: With the rapid development and commercialization of fifth-generation (5G) technology, calibration and RF testing using over-the-air (OTA) is becoming increasingly important. Due to the large ...

Abstract: The article proposes a novel approach for in-orbit satellite antenna pattern measurement by means of a dedicated small measurement satellite (MES) that flies in Double-Cross-Helix formation.