Radar cross sections at terahertz frequencies are measured on scale models of aircrafts. A time domain broadband THz system generates freely propagating THz pulses measured with sub-picosecond time resolution. The THz radiation is generated using fs laser pulses by optical rectification in a lithium niobate crystal with application of the tilted wave front method, resulting in high electric field THz pulses with a broad band spectrum from 100 GHz up to 4 THz. The corresponding wave lengths are two orders of magnitude smaller than normal radars and we therefore use scale models of size 5-10 cm in order to measure realistic radar cross sections. RCS polar and azimuthal angle plots of F-16 and F-35 are presented.
|Title of host publication||proceedings SET-159|
|Publication status||Published - 2010|
|Event||Sensors & Electronics Technology Panel Specialists’ Meeting : Terahertz and other electromagnetic wave techniques for defence and security - Vilnius, Lithuania|
Duration: 1 Jan 2010 → …
Conference number: 159
|Conference||Sensors & Electronics Technology Panel Specialists’ Meeting : Terahertz and other electromagnetic wave techniques for defence and security|
|Period||01/01/2010 → …|