Synthesis of compromise sum-difference arrays through time-modulation

• Published in: IET radar, sonar & navigation Vol. 3; no. 6; pp. 630 - 637
• Main Authors: Rocca, P., Manica, L., Poli, L., Massa, A.
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 01.12.2009; The Institution of Engineering & Technology
• Subjects: Antennas; Applied sciences; Arrays; Electromagnetism; Engineering Sciences; Exact sciences and technology; Information, signal and communications theory; Mathematical models; Modulation, demodulation; Navigation; Optimization; Radar; Radiocommunications; Signal and communications theory; Signal and Image processing; Sonar; Switches; Synthesis; Telecommunications; Telecommunications and information theory; Partition method; Modulation; Evolutionary computation; Numerical simulation; Swarm intelligence; Radiofrequency; Antenna array; Sideband; Pulse sequence
• ISSN: 1751-8784; 1751-8792; 1751-8792
• DOI: 10.1049/iet-rsn.2009.0058

In this study, time-modulation is exploited for the synthesis of monopulse sub-arrayed antennas. The solution of the compromise sum-difference problem is obtained by setting the set of static excitations to an optimal sum set and synthesising the 'best compromise' difference pattern through a contiguous partition method based approach. The array elements are aggregated into sub-arrays controlled by means of radio frequency switches with optimised 'on' time-durations. The switch-on instants of the pulse sequences are then computed by means of a particle swarm optimiser to reduce the interferences caused by the sideband radiations. A selected set of numerical results is reported to assess the potentialities of time-modulation in dealing with the synthesis problem at hand.