A UWB filtering antenna (or filtenna) with a band-notched characteristic has been proposed in this paper. A square-shaped-stepped patch UWB antenna and an inverted T--shaped bandpass filter based integrated filtering antenna (IFA) with band-notch characteristic has been designed and fabricated. The size of the proposed filtenna is the same as the UWB patch antenna. The UWB patch antenna has a bandwidth from 3 GHz to more than 14 GHz. A UWB filter having a notched band is proposed and integrated with the primarily offered square-shaped--stepped patch antenna to design an IFA for UWB wireless communication system. The filter is placed on the feeding position of the patch antenna, and the output of the filter is coupled with the radiating patch to achieved the desired result. Proposed filtenna achieves circular polarization, minimum of 14 dB out of band gain rejection, and a notched band from 5.55 to 6.98 GHz, which avoids the interference from Dedicated Short Range Communication (DSRC) applications. A wide axial-ratio bandwidth (AXBW) from 3.1 to 5.5 GHz and 7–9.8 GHz along with a maximum gain of 6.8 dBi within the operating frequency range of the proposed filtenna has been achieved.

本文提出了一种具有带隙特性的UWB滤波天线。设计并制造了方形阶梯式贴片UWB天线和具有带陷波特性的基于倒T型带通滤波器的集成滤波天线（IFA）。拟议的短纤天线的尺寸与UWB贴片天线的尺寸相同。UWB贴片天线的带宽从3 GHz到14 GHz以上。提出了一种具有陷波频带的UWB滤波器，并将其与最初提供的方形阶梯式贴片天线集成在一起，以设计用于UWB无线通信系统的IFA。滤波器放置在贴片天线的馈电位置上，并且滤波器的输出与辐射贴片耦合以实现所需的结果。拟议中的filtenna可实现圆极化，至少有14 dB的带外增益抑制，以及5.55至6.98 GHz的陷波频带，避免了专用短程通信（DSRC）应用的干扰。在拟议的天线的工作频率范围内，已实现了从3.1到5.5 GHz和7-9.8 GHz的宽轴比带宽（AXBW），以及最大6.8 dBi的增益。