By Harkins W. D.
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Additional resources for An Electromagnetic Hypothesis of the Kinetics of Heterogeneous Equilibrium, and of the Structure of
96 dB, which is reduced by 6 dB compared with that of an equally spaced linear array . 9: Geometry of a 10-element, unequally spaced linear array. The element excitations are uniform, and the locations are optimized to suppress the SLLs. 10: Convergence curve of the fitness value of the 10-element, unequally spaced linear array for the suppressed SLL design. 11: Array factor of the 10-element linear array. The SLL of the optimized unequally spaced array is 6 dB lower than that of the equally spaced array.
75. When this optimization process has been executed for 23 iterations, an optimal null control pattern is obtained, as presented in Fig. 2. 4º, and nulls are below -55 dB in the angle ranges of [50º, 60º] and [120º, 130º], as desired. 046], as shown in Fig. 3. 2: Null controlled pattern of an optimized 20-element linear array. 4º. From , copyright © IEEE 2007. 3: Optimized excitation magnitudes of the linear antenna array with a null-controlled pattern shown in Fig. 2. From , copyright © IEEE 2007.
3) is used again for evaluating the fitness value during the optimization process. 1, which offers five optimization parameters corresponding to the location of five antenna elements, is used in this study. To start the optimization2 process, the initial level values of the parameters d (n ) 1 are set to the locations of an equally spaced linear array, and LD1 is set to quarter wavelength. 2 shows the initial values of each element in the first iteration. 9, respectively. After 60 iterations, an optimized pattern is obtained since the fitness is converged, as shown in Fig.
An Electromagnetic Hypothesis of the Kinetics of Heterogeneous Equilibrium, and of the Structure of by Harkins W. D.