In this paper, an ultra-wideband (UWB) dual-notch planar antenna is presented. The antenna, in its structure, utilizes a compact electromagnetic bandgap (EBG) structure with new open meander slits to notch two frequency bands at around 3.5 and 5.5 GHz. The main idea is to place the new slitted mushroom-type EBG structure at the vicinity of the feedline to achieve filtering ability for the antenna. The presented EBG structure has many benefits, like notched bands with sharp roll off, independent control over the notched bands, little effects on antenna performance, easy switching configuration and reduction of the required number of EBG cells. The fabricated antenna shows −10 dB bandwidth of 2.63 up to 13 GHz with dual-notched in the frequency bands of 3.11–4.01 GHz and 5.15–5.98 GHz. Simulation and experimental results exhibit a close agreement with each other. The proposed UWB antenna with a flat transfer function and a constant group delay at the notched bands is a suitable choice for compact UWB communication systems.

本文提出了一种超宽带（UWB）双陷波平面天线。该天线在结构上采用了紧凑的电磁带隙（EBG）结构，带有新的开放式曲折缝，可以在3.5 GHz和5.5 GHz附近对两个频段进行陷波。主要思想是在馈线附近放置新的切开的蘑菇型EBG结构，以实现天线的滤波能力。所呈现的EBG结构具有许多优点，例如带陡峭滚降的陷波带，对陷波带的独立控制，对天线性能的影响很小，易于切换的配置以及所需EBG单元数量的减少。制成的天线在13 GHz时显示出2.63的−10 dB带宽，在3.11–4.01 GHz和5.15–5.98 GHz的频带中具有双陷波。模拟和实验结果相互之间有着密切的一致性。所提出的具有平坦传递函数和在陷波频带处具有恒定群时延的UWB天线是紧凑型UWB通信系统的合适选择。