ABSTRACT

In this paper, a miniaturised band-notched Printed Log Periodic Dipole Array (PLPDA) is designed with fractal dipole for UWB Communication. The miniaturisation is achieved using Meander fractal geometry applied to each dipole element of the PLPDA. The sub-sectional tapered concept is integrated to achieve notches in the WLAN band (5.15 GHz-5.825 GHz) and the WiMAX band (3.4 GHz-3.6 GHz). A broad bandwidth of 7.78 GHz is achieved here by using this fractal geometry-based band-notch concept. The structure of UWB-PLPDA is fabricated on a RO3003 substrate material. Initially, a surface area reduction of 79% in the case of PLPDA with sub-sectional tapered dipole and later, a surface area reduction of 82% with improved performances in case of PLPDA with meander line fractal, are achieved compared to the simple PLPDA design. The simulated design models are physically fabricated, and the measured results found in good agreement with the simulated results. The proposed miniaturised PLPDA is a suitable candidate for high-speed-short-range wireless communications.

摘要

本文设计了一种带有分形偶极子的小型带隙印刷对数周期偶极子阵列（PLPDA），用于UWB通信。使用应用于PLPDA的每个偶极子元件的Meander分形几何形状可以实现小型化。集成了分段锥形概念，以实现WLAN频段（5.15 GHz-5.825 GHz）和WiMAX频段（3.4 GHz-3.6 GHz）的陷波。通过使用这种基于分形几何学的频带陷波概念，可以实现7.78 GHz的宽带宽。UWB-PLPDA的结构是在RO3003基板材料上制造的。最初，与简单的PLPDA设计相比，采用分段圆锥形偶极子的PLPDA的表面积减小了79％，之后，采用曲折线分形的PLPDA的性能得到了减小的82％的表面积。 。仿真设计模型是物理制造的，测量结果与仿真结果非常吻合。提出的小型化PLPDA是高速短程无线通信的合适候选者。