Improving Bandwidth of Yagi-Uda Arrays

• 作者: Richard A. Formato
• 来源期刊: 无线工程与技术(英文)
• 学科: 工学
• 关键词: Variable Z0 Z0 Characteristic IMPEDANCE Feed System ANTENNA ANTENNA DESIGN ANTENNA OPTIMIZATION DESIGN Objectives Performance Objectives BANDWIDTH IMPEDANCE BANDWIDTH Broadband Ultra Wideband UWB Yagi Yagi-Uda Central Force OPTIMIZATION CFO Numerical OPTIMIZATION OPTIMIZATION Algorithm Metaheuristic Dominating Cone Line Search DCLS
• 年，卷（期）: 2012,（1）
• 页码范围: 18-24
• 页数: 7页
• 分类号: TP1

摘要

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.