Research on planar antennas and arrays: ´structures Rayonnantes´

The basic research on radiowave systems dealing with electromagnetism, electronics, and signal processing at the University of Rennes is discussed. The fusion of these different domains occurs for studies concerning systems where radiating structures, active devices and interfaces, and signal processing play a fundamental role and cannot be separated. Different geometries and methods developed for various types of patches, dipoles, and slot antennas, including patch antennas with coaxial or microstrip feeds, printed slot antennas, slot-fed patches, slot-loaded patches, and electromagnetic coupled dipoles and patches, are described. Different kinds of arrays have been designed with active or passive feed networks. The analysis includes mutual-coupling effects, especially when beam steering is considered with small element spacing. Arrays considered include planar phased arrays, planar passive arrays, dual-beam printed antennas, and arrays of microstrip dipoles.<>