Title :
Pulse-Shaping Strategy for Time Modulated Arrays—Analysis and Design
Author :
Bekele, Ephrem T. ; Poli, Lorenzo ; Rocca, Paolo ; D´Urso, Michele ; Massa, A.
Author_Institution :
Dept. of Inf. Eng. & Comput. Sci., Univ. of Trento, Trento, Italy
fDate :
7/1/2013 12:00:00 AM
Abstract :
Time-modulated arrays (TMAs) are antenna systems where the transmitted or received signal is modulated by periodic time pulses. Several strategies have been proposed for defining the characteristics of the pulse sequence to control the antenna radiation pattern starting from the hypothesis of ideal radio-frequency (RF) switches with instantaneous rise and fall time. In this paper, the use of switches having a non-null transition between the on and off state is taken into account and the impact on the radiation features is studied and verified through a set of numerical results also in comparative fashion with ordinary rectangular pulses.
Keywords :
antenna arrays; antenna radiation patterns; array signal processing; antenna radiation pattern; antenna systems; fall time; ideal radio-frequency switches; non-null transition; off state; on state; periodic time pulses; pulse sequence; pulse-shaping strategy; radiation features; received signal; rise time; time modulated arrays; transmitted signal; Beam-forming; pulse-shaping; sideband radiation; time modulated array (TMA);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2256096