DocumentCode :
3612288
Title :
Application of multi-objective fractional factorial design for ultra-wideband antennas with uniform gain and high fidelity
Author :
Yen-Sheng Chen
Author_Institution :
Dept. of Electron. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Volume :
9
Issue :
15
fYear :
2015
Firstpage :
1667
Lastpage :
1672
Abstract :
An efficient design methodology is presented for developing ultra-wideband (UWB) antennas with uniform gain and high fidelity. The major challenge for designing UWB antennas is to simultaneously meet all the frequency-domain and time-domain performance criteria including good impedance matching throughout the operational frequencies, relatively uniform gain over the UWB, and high waveform fidelity on pulse-preserving capabilities. If the framework of Pareto-based evolutionary algorithms is adopted, it may require thousands of tests to find an optimum structure due to the blind-search feature. In this study, all the requirements of UWB antenna design can now be efficiently achieved by the proposed methodology, which integrates the processes of fractional factorial design of experiments and Derringer´s desirability functions into a multi-objective optimisation technique. The detailed procedure and its capability are demonstrated by an UWB planar monopole antenna design which comprises nine design parameters. By performing merely 64 predefined simulations, the optimum antenna structure is determined with an excellent impedance matching by 2:1 voltage standing wave ratio and a relatively constant gain (2.48-5.04 dBi) over the frequency band of 3.1-10.6 GHz. Meanwhile, the time-domain distortion is greatly reduced in comparison with the reference design which simply optimises the characteristic of impedance matching.
Keywords :
Pareto optimisation; evolutionary computation; microwave antennas; monopole antennas; planar antennas; ultra wideband antennas; Derringer desirability functions; Pareto based evolutionary algorithms; UWB antenna design; UWB planar monopole antenna design; blind search feature; fractional factorial design of; frequency 3.1 GHz to 10.6 GHz; frequency domain performance; gain 2.48 dB to 5.04 dB; impedance matching; multiobjective fractional factorial design application; multiobjective optimisation technique; operational frequencies; optimum structure; time domain performance; ultrawideband antennas; uniform gain;
fLanguage :
English
Journal_Title :
Microwaves, Antennas Propagation, IET
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2015.0150
Filename :
7355449
Link To Document :
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