Wireless Engineering and Technology

Volume 3, Issue 1 (January 2012)

ISSN Print: 2152-2294   ISSN Online: 2152-2308

Google-based Impact Factor: 2.09  Citations  

Improving Bandwidth of Yagi-Uda Arrays

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DOI: 10.4236/wet.2012.31003    12,915 Downloads   20,944 Views  Citations
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ABSTRACT

A novel approach for improving antenna bandwidth is described using a 6-element Yagi-Uda array as an example. The new approach applies Central Force Optimization, a deterministic metaheuristic, and Variable Z0 technology, a novel, proprietary design and optimization methodology, to produce an array with 33.09% fractional impedance bandwidth. This array’s performance is compared to its CFO-optimized Fixed Z0counterpart, and to the performance of a 6-ele- ment Dominating Cone Line Search-optimized array. Both CFO-optimized antennas exhibit better performance than the DCLS array, especially with respect to impedance bandwidth. Although the Yagi-Uda antenna was chosen to illustrate this new approach to antenna design and optimization, the methodology is entirely general and can be applied to any antenna against any set of performance objectives.

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R. Formato, "Improving Bandwidth of Yagi-Uda Arrays," Wireless Engineering and Technology, Vol. 3 No. 1, 2012, pp. 18-24. doi: 10.4236/wet.2012.31003.

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