Wideband connected arrays of dipoles are a very promising solution for broadband, wide-angle scanning phased arrays. Unlike tapered slot antennas, connected arrays can operate over wide bandwidth maintaining polarization purity. However, an open issue for the practical implementation of these arrays is the propagation of common-mode currents along the differential feeding lines. A solution for this problem is here proposed and is constituted by a loop-shaped transformer that acts as common-mode rejection circuit. Simulated results are presented for connected arrays of dipoles for both linear and dual polarization, with 30% relative bandwidth (from 10.7 to 14.5 GHz) and scanning capability up to 45° for any azimuth.
|Title of host publication||Proceedings of the 2010 IEEE International Symposium on Phased Array Systems and Technology (ARRAY), 12-15 October 2010, Waltham, Massachussetts|
|Place of Publication||Piscataway|
|Publisher||Institute of Electrical and Electronics Engineers|
|Publication status||Published - 2010|