Title :
ESPAR Antenna System for Dynamic Tracking of Active Targets
Author :
Kausar, Shafaq ; Rahman, Hamood Ur ; Kausar, Asmz ; Hassan, Thomas
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Sci. & Technol., Islamabad, Pakistan
Abstract :
Paper encompasses formulation of mathematical model, simulation and later designing of ESPAR (Electronically Steerable Parasitic Array Radiator) antenna capable of dynamic tracking of active targets in 3D. Variable reactance set was loaded in array of elements surrounding center element. Reactance value for placement of maxima is specified direction in 3D axis is formulated using Quasi Newton Method. Using calculated values 3D beam steering is achieved. Around 8 dB gain is achieved in specified direction of Theta and Phi. Designed antenna is efficient in terms of size and cost as all the elements are placed at Lambda/4, thereby revolutionizing present day communication systems and replacing conventional Omni directional antennas in Radios, Laptops, Cell phones. Along with efficient beam forming designed antenna is a step forward towards green technology, operating at reduced powers without disrupting EIRP of antenna systems, thereby maintaining constant EIRP.
Keywords :
Newton method; antenna arrays; 3D beam steering; ESPAR antenna system; active target dynamic tracking; directional antennas; electronically steerable parasitic array radiator antenna; quasi Newton method; variable reactance set; Antenna arrays; Arrays; Beam steering; Dipole antennas; Load modeling; Mathematical model; Directivity; ESPAR (Electronically Steerable Parasitic Array Radiator); HFSS (High frequency structure simulator); Parasitic;
Conference_Titel :
Modelling Symposium (EMS), 2013 European
Conference_Location :
Manchester
Print_ISBN :
978-1-4799-2577-3
DOI :
10.1109/EMS.2013.88