The Fine-Grained Parallel Micro-Genetic Algorithm and Its Application to Broadband Conical Corrugated-Horn Antenna

Abstract

Abstract-The fine-grained parallel micro-genetic algorithm (FGP-MGA) is developed to solve antenna design problems. The synthesis of uniformly exited unequally spaced array is presented. Comparison with the micro-genetic algorithm (MGA) has been carried out. It is seen that the FGPMGA significantly outperforms MGA, in terms of both the convergence rate and exploration ability. The FGPMGA can also reduce the optimization time. Then the FGPMGA and the body of revolution finite-difference time-domain (BOR-FDTD) are combined to achieve an automated design process for conical corrugated-horn antenna. Numerical simulation results show that the horn antenna has good impedance matching (the VSWR is less than 1.5), stable beamwidth and gain, as well as good rotation symmetry patterns over the whole band 8∼13 GHz.

Fast Synthesis of Large Planar Arrays Using Active Element Pattern Method and Fine-Grained Parallel Micro-Genetic Algorithm

“…Our research shows that the FGPMGA significantly outperforms microgenetic algorithm (MGA), in terms of both the convergence rate and exploration ability [28].…”

“…In each neighborhood, different crossover and mutation probability, as well as different methods of mutation and crossover. The procedure of the FGPMGA is described in [28].…”

Development and Calibration of a K-Band Ground-Based Hyperspectral Microwave Radiometer for Water Vapor Measurements

“…As shown in Fig. 4, the ultra-wideband antenna has a bandwidth of 36% (18)(19)(20)(21)(22)(23)(24)(25)(26), circular polarization, and a VSWR of 1.4, 1.8, and 1.6 at the radiometer typical operating frequencies, respectively. The performance of the antenna demonstrating the beamwidth of 10-14 • , gain of 19-25 dB, side lobe of less than 20 dB, and back lobe of less than 30 dB over the radiometer's frequency range.…”

“…The BHU-K80 uses a conical horn antenna with ultra-wideband, high directivity, narrow beamwidth, high main-beam efficiency, high radiation efficiency, low side lobe levels and simple structure [22]. As shown in Fig.…”

“…In this paper, the K-band ground-based hyperspectral microwave radiometer (BHU-K80) for water vapor profiling is introduced, which is used to measure the continuous atmospheric radiation spectral power in [18][19][20][21][22][23][24][25][26] GHz. The number of the spectral channels is 80.…”