TY - JOUR
T1 - Beamsteering in pattern reconfigurable arrays using directional modulation
AU - Daly, Michael P.
AU - Bernhard, Jennifer T.
N1 - Funding Information:
Manuscript received June 17, 2009; revised November 06, 2009; accepted December 23, 2009. Date of publication March 29, 2010; date of current version July 08, 2010. This work was supported by an NDSEG Fellowship. The authors are with the Electromagnetics Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA (e-mail: [email protected]). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TAP.2010.2046854 Fig. 1. Block diagrams of a simplified traditional reconfigurable array transmitter with baseband and RF portions (top) and the reconfigurable array DM transmitter (bottom).
PY - 2010/7
Y1 - 2010/7
N2 - An array with pattern-reconfigurable elements is used to generate a digital modulation by switching the elements for every symbol. This technique is known as directional modulation. Because the modulation is generated at the antenna level, it gives control over the directions in which data is sent, unlike baseband modulation which transmits the same data in all directions at different power levels. A procedure for determining how to switch the elements to transmit only in a specified direction is outlined. Results indicate that compared to a traditional reconfigurable array, the directional modulation array allows information to be sent over a narrower beamwidth. Additionally, the method provides more selectivity in the possible transmit angles. Measured and calculated results from a four-element reconfigurable array are presented.
AB - An array with pattern-reconfigurable elements is used to generate a digital modulation by switching the elements for every symbol. This technique is known as directional modulation. Because the modulation is generated at the antenna level, it gives control over the directions in which data is sent, unlike baseband modulation which transmits the same data in all directions at different power levels. A procedure for determining how to switch the elements to transmit only in a specified direction is outlined. Results indicate that compared to a traditional reconfigurable array, the directional modulation array allows information to be sent over a narrower beamwidth. Additionally, the method provides more selectivity in the possible transmit angles. Measured and calculated results from a four-element reconfigurable array are presented.
KW - Digital modulation
KW - reconfigurable antenna
KW - reconfigurable array
KW - secure communication
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U2 - 10.1109/TAP.2010.2046854
DO - 10.1109/TAP.2010.2046854
M3 - Article
AN - SCOPUS:77954553584
SN - 0018-926X
VL - 58
SP - 2259
EP - 2265
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 7
M1 - 5439878
ER -