Wide band shaped beam array of U-slot patches for high resolution SAR and satellite communications

This paper presents the design of practical antenna arrays with beam shaping controllability and beam steering capability for land imaging synthetic aperture radar (SAR) systems and satellite communications. The U-shaped slot patch antenna with optimal design parameters is suggested as a single element for the proposed antenna arrays. The proposed antenna exhibits a wide bandwidth enough for the target applications. It is shown that the mutual coupling between such elements in both E-plane and H-plane arranged arrays is naturally weak. The Particle Swarm Optimization (PSO) algorithm is customized and applied to optimize the elements feeding (both amplitude and phase) to get multiple radiation patterns including flat-topped (fan-shaped), cosecant-squared and Isoflux beams. The results obtained in the present work are compared with other published results showing superior performance.

[1]  Shuxi Gong,et al.  Implicit Space Mapping Applied to the Synthesis of Antenna Arrays , 2011 .

[2]  F. Ares,et al.  Pattern synthesis of array antennas with arbitrary elements by simulated annealing and adaptive array theory , 1999 .

[3]  Tommaso Isernia,et al.  OPTIMAL SYNTHESIS OF PHASE-ONLY RECONFIGURABLE LINEAR SPARSE ARRAYS HAVING UNIFORM-AMPLITUDE EXCITATIONS , 2012 .

[4]  M Ruzica Golubovic,et al.  Antenna Optimization Using Particle Swarm Optimization Algorithm , 2006 .

[5]  K. M. Luk,et al.  Experimental study of a two-element array of U-slot patches , 1996 .

[6]  Y. Chan,et al.  An Introduction to Synthetic Aperture Radar (SAR) , 2008 .

[7]  Khalid Fawzy Ahmed Hussein.  CONICAL LINEAR SPIRAL ANTENNA FOR TRACKING, TELEMETRY AND COMMAND OF LOW EARTH ORBIT SATELLITES , 2012 .

[8]  Durbadal Mandal,et al.  Synthesis of time modulated linear antenna arrays using particle swarm optimization , 2014, TENCON 2014 - 2014 IEEE Region 10 Conference.

[9]  Rowdra Ghatak,et al.  Synthesis of Digitally Controlled Cosecant Squared Pattern in Time-Modulated Linear Antenna Arrays using Differential Evolution , 2013 .

[10]  Y. Chow,et al.  Experimental study of a microstrip patch antenna with an L-shaped probe , 2000 .

[11]  Anyong Qing.  Differential Evolution: Fundamentals and Applications in Electrical Engineering , 2009 .

[12]  K. Luk,et al.  Experimental and simulation studies of the coaxially fed U-slot rectangular patch antenna , 1997 .

[13]  Y. Rahmat-Samii,et al.  Particle swarm optimization in electromagnetics , 2004, IEEE Transactions on Antennas and Propagation.

[14]  P. Woodward,et al.  The Theoretical Precision with which an Arbitrary Radiation-Pattern may be Obtained from a Source of Finite Size , 1948 .

[15]  S. Rengarajan,et al.  Genetic algorithms in the design and optimization of antenna array patterns , 1999 .

[16]  Kwai-Man Luk,et al.  A broad-band U-slot rectangular patch antenna on a microwave substrate , 2000 .