Design and simulation of variants of koch models for fractal antenna
Fractal antennas are multi-resonant, wideband and smaller in size and have good applications in areas like mission-oriented activities. Many fractal shapes work better as antenna than circular antenna. A good antenna is mainly measured in terms of return loss (RL), Voltage Standing Wave Ratio (VSWR)...
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| Format: | Thesis |
| Language: | English |
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2011
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| Online Access: | http://umpir.ump.edu.my/id/eprint/9104/ http://umpir.ump.edu.my/id/eprint/9104/ http://umpir.ump.edu.my/id/eprint/9104/1/CD8505%20%40%20108.pdf |
| Summary: | Fractal antennas are multi-resonant, wideband and smaller in size and have good applications in areas like mission-oriented activities. Many fractal shapes work better as antenna than circular antenna. A good antenna is mainly measured in terms of return loss (RL), Voltage Standing Wave Ratio (VSWR) and bandwidth. The performance of a fractal antenna is directly related to its dimension. Koch curve and many of its variants have been studied widely as fractal antennas and their antenna characteristics have been improved. There is a continuous need to improve the performance of fractal antenna in terms of reduced size, lesser VSWR, lesser RL and wider bandwidth. For improved performance, shapes of further lesser dimensions with smaller sizes are required. It is also required to have more flexibility in design of fractal antennas of smaller sizes. The self-similarity dimension of the Koch curve geometry can be varied by changing the generator used in the recursive Iterated Function System (IFS). In the research work, new variants of Koch models have been generated by dividing the initiator into unequal parts and their mathematical properties have been analyzed. Many of the new variants of Koch models are of reduced size. One of the reduced-sized Koch model have been simulated and it was found that it has better performance than the von Koch curve in terms of RL, VSWR and bandwidth. One of the new variants, which is of the same size and dimension as conventional Koch curve but with different design, have been generated, simulated and compared with the conventional Koch curve. It was found that the two curves of the same size and dimension performed differently due to different designs |
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