Design and realization of ga-optimized wire monopole and matching network with 20 : 1 bandwidth
Authors:
- 28 May 2003
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 51 (3) , 493-502
Abstract
This paper presents the successful design and physical realization of broadband loaded wire monopoles with matching networks. The loads are parallel inductor/resistor circuits that are adjusted by means of genetic algorithm (GA) optimizers to maximize bandwidth, and the matching networks are transmission-line transformers. The micro-GA is shown to be more convenient and efficient for optimizing these loaded antenna systems than is the simple-GA. The measured voltage standing-wave ratio (VSWR) of the loaded antennas confirm broadband performance and agree with data obtained from moment method computations. Antennas having bandwidth ratios of 12.6 : 1 and 18 : 1, with measured VSWR less than 3.5 and calculated system gain greater than -4.5 dBi, are presented. Finally, an antenna system is given that has measured VSWR less than 3.0 and calculated system gain greater than -3.2 dBi over a 20 : 1 band.Keywords
This publication has 11 references indexed in Scilit:
- Very broadband loaded monopole antennas2002
- Genetic algorithm optimization and realization of broadband loaded wire monopoles2002
- Realization of a genetic‐algorithm‐optimized wire antenna with 5:1 bandwidthRadio Science, 2001
- On the application of the microgenetic algorithm to the design of broad-band microwave absorbers comprising frequency-selective surfaces embedded in multilayered dielectric mediaIEEE Transactions on Microwave Theory and Techniques, 2001
- Inductance of a shielded coilIEEE Transactions on Antennas and Propagation, 2001
- Monopoles Loaded With Coils: a Comparison of Measured and Computed ResultsJournal of Electromagnetic Waves and Applications, 2001
- New designs of ultra wide-band communication antennas using a genetic algorithmIEEE Transactions on Antennas and Propagation, 1997
- Design of electrically loaded wire antennas using genetic algorithmsIEEE Transactions on Antennas and Propagation, 1996
- Micro-Genetic Algorithms For Stationary And Non-Stationary Function Optimization1990
- Generation of wide-band data from the method of moments by interpolating the impedance matrix (EM problems)IEEE Transactions on Antennas and Propagation, 1988