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Analysis and Optimization of Dual Arm, Center Excited, Surface Micro-machined Archimedean Spiral Antenna with Improved Wideband Characterestics

G. Miranda[1], N. S. Pamidighantam[1], R. V. Iyer[2], S. Shukla[3], P. Suresh[3], and P. M. Soundarajan[3]
[1]Department of Telecommunications, PESIT, Bangalore,Karnataka,India
[2]Department of Science and Humanities, PESIT, Bangalore,Karnataka,India

An Archimedean Spiral antenna is the common frequency independent antenna which have very large bandwidth. Archimedean Spiral antenna are circularly polarized and typically have radiation patterns with peaks perpendicular to the plane of the spiral.

Micro-machining techniques improves the bandwidth characteristics and the radiation efficiency of the antenna. Simulations and results with COMSOL Mutiphysics 4.1 focus on showing the far-field radiation patterns, S parameter varying with frequency and its impedance view, and the Voltage Standing Wave Ratio with varying frequency.

Results also show that micro-machined antenna show better radiation efficiency than non micro-machined antenna.