• bias
• circular polarization.
• cork
• diodes
• Feedline
• Substrate Integrated Waveguide

In this thesis, a novel SIW cavity-backed antenna reconfigurable in polarization in a huge frequency band, based on a cork substrate, is discussed. The polarization reconfigurability is achieved by means P-i-N diodes properly biased applying a certain current on the coaxial cable. Making an antenna reconfigurable allows the design to be generic and suitable for various applications. Furthermore, an additional layer on the top of the antenna is avoided and this reduces the amount and length of interconnections needed, improving the reliability.