Details

Autor(en) / Beteiligte

• Kolpatzeck, Kevin
• Haring, Lars
• Czylwik, Andreas

Titel

Power budget analysis and optimization of photonic beamforming concepts for terahertz transmitters

Ist Teil von

• 2016 German Microwave Conference (GeMiC), 2016, p.7-10

Ort / Verlag

Institut für Mikrowellen und Antennentechnik - IMA

Erscheinungsjahr

2016

Quelle

IEEE/IET Electronic Library

Beschreibungen/Notizen

• Among all concepts for beamforming in terahertz frequency transmitters, those based on a photonic approach are particularly interesting, given the possibility of terahertz generation by photomixing. By moving the power distribution as well as phase and amplitude adjustment network of a photodetector-fed array from the electrical into the optical domain, antenna design is greatly simplified and better use can be made of the small terahertz power delivered by photomixing. However, for highest RF output power, optical input power of the photodetectors needs to be optimized. A photonic phase shift beamforming approach is presented along with its mathematical description. For this approach, a power budget analysis is carried out and most effective placement of optical amplifiers in the beamforming network is investigated. Based on these results, the improvement in equivalent isotropically radiated power over a single radiator is numerically calculated for arrays of different sizes.