Title :
Including spatial correlation of thermal noise in the noise model of high-sensitivity arrays
Author :
Craeye, Christophe
Author_Institution :
Lab. TELE, Univ. Catholique de Louvain, Louvain-la-Neuve, Belgium
Abstract :
The design of very-high sensitivity arrays requires the analysis of thermal noise generated by the slightly lossy antennas. In strongly coupled arrays, thermal noise available on different ports may be correlated. A method is proposed for the computation of this correlation and for the estimation of its effect on the system noise temperature, which becomes dependent on scan angle. A numerical simulation example shows that the correlated part of the noise can play an important role in the fraction of system noise originating from the lossy antennas.
Keywords :
antenna arrays; correlation theory; electromagnetic coupling; numerical analysis; thermal noise; coupled array; high-sensitivity array; lossy antenna; noise model; numerical simulation; spatial correlation; system noise temperature; thermal noise; Antenna arrays; Antenna measurements; Extraterrestrial measurements; Impedance; Noise generators; Noise level; Reflector antennas; Temperature; Thermal conductivity; Working environment noise; Arrays; noise; sensitivity;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.858825