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In this study, a position control scheme of a radio telescope(antenna) is presented. The controller is designed in MATLAB Simulink environment where the antenna model is created. PID controller is proposed to satisfy the requirement of high accuracy position control. However, with the presence of wind disturbance in the system model, it will disrupt the operation of the antenna since it is one of...
This paper presents the significance of the application of Firefly Algorithm (FA) in the Linearly Constrained Minimum Variance (LCMV) beamforming technique. In this work, in order to obtain the best result, different amounts of parameters such as iteration, null and the boundary have been implemented for more than 30 times. This is done to improve the null steering, signal to interference plus noise...
One of the important properties of Archimedean spiral antenna (ASA) is its unidirectional radiation pattern properties. This property is mainly achieved by using ground plane placed behind the spiral antenna. This paper presents the effects of air cavity ground plane on the design of two arms ASA. The GP is placed at λ/4 for the selected design frequencies. The GP deteriorates the antenna's performance...
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