Title :
A wide-bandwidth electronic scanning antenna for multimode RF sensing
Author :
Phu, Phuong ; Dahlstrom, Robert ; Scheiner, Barry ; Adler, Eric ; Lilly, James
Author_Institution :
US Army Res. Lab., Adelphi, MD, USA
Abstract :
A wide-bandwidth electronic scanning antenna (ESA), based on a Rotman lens beam-former, has been developed for shared aperture applications. The key feature of the Rotman lens is that it allows multiple simultaneous beams to be transmitted in different directions and at different frequencies. Since the Rotman lens is a true time-delay element, it is inherently wide-bandwidth and other components of the antenna were designed to support a bandwidth of 8 to 18 GHz. In the ESA, the input signal to the Rotman lens is controlled by a PIN diode beamswitching network, and the outputs are fed to a two-dimensional array of Vivaldi notches. The ESA performance is characterized, and the results is presented
Keywords :
antenna radiation patterns; aperture antennas; lens antennas; linear antenna arrays; microwave antenna arrays; military radar; multibeam antennas; p-i-n diodes; radar antennas; scanning antennas; 2D Vivaldi notch array; 8 to 18 GHz; PIN diode beamswitching network; Rotman lens; Rotman lens beamformer; input signal; linear antenna array; multimode RF sensing; multiple simultaneous beams transmission; performance; point-to-point communications; radar antenna; shared aperture applications; tactical platforms; time-delay element; wide-bandwidth electronic scanning antenna; Aerospace electronics; Antenna arrays; Aperture antennas; Azimuth; Bandwidth; Laboratories; Lenses; Radio frequency; Space technology; Switches;
Conference_Titel :
Radar Conference, 1999. The Record of the 1999 IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-4977-6
DOI :
10.1109/NRC.1999.767305
