Title :
A Monopulse Rotman Lens Phased Array for Enhanced Angular Resolution
Author :
Schulwitz, Lora ; Mortazawi, Amir
Author_Institution :
Univ. of Michigan, Ann Arbor
Abstract :
A low cost monopulse phased array is described, which is based upon a Rotman lens and switched line phase shifting network. An amplitude comparison monopulse scheme is implemented, where the phased array is capable of scanning the sum and difference beams throughout a 60deg field of view. The sum beam directivity is better than 12 dB within a 6 GHz bandwidth at Ka band. Over 20 dB difference beam nulls were achieved throughout a 1 GHz bandwidth. The entire phase shifting circuit occupies a size of 62 mm by 62 mm, which is no larger than conventional Rotman lens circuitry.
Keywords :
antenna phased arrays; beam steering; lens antennas; microwave antennas; phase shifters; amplitude comparison monopulse scheme; angular resolution; monopulse Rotman lens phased array; phase shifting circuit; phase shifting network; sum beam directivity; Antenna arrays; Bandwidth; Beam steering; Circuits; Control systems; Costs; Dielectric materials; Lenses; Phase shifters; Phased arrays; Beam steering; Rotman lens; monopulse; multiple beam; phased array;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380136
