The paper presents a loaded planar monopole ultra-wideband (UWB) antenna exhibiting quad-band notched characteristics. Triple U-shaped slots over the metallic radiating conductor and a meander line electromagnetic bandgap (EBG) structure are loaded near the feed line in the proposed design. These three U-shaped slots are responsible for generating triple band notches at 2.80 GHz (2.53–3.15 GHz, Aviation Service Band), 3.37 GHz (3.23–3.68 GHz, WiMAX band), 4.08 GHz (3.92–4.30 GHz, C-band Satellite Downlink), whereas the EBG unit cell placed near the feedline is responsible for creating additional notched band at 5.95 GHz (5.49–6.19 GHz, C-band satellite uplink), respectively. The antenna has very compact size of 0.71λ₀×0.8λ₀×0.03λ₀ and is modeled on FR4 substrate using ANSYS HFSS tool. The antenna without any extra arrangement covers an impedance bandwidth ranging from 2.9 to 10.5 GHz which suitably meets the requirement of UWB applications. However, the proposed antenna integrated with U-shaped slots and EBG-unit cell, filters out four different notched frequencies within working bands without disturbing the performance of the monopole antenna. Moreover, the designed antenna is compact in size with improved performance and having efficient notch controlling capacities. Also, the measured performance of the fabricated prototype is in very good agreement with the simulated counterparts.

本文介绍了一种负载平面单极超宽带 (UWB) 天线，该天线具有四波段陷波特性。在所提出的设计中，金属辐射导体上的三重 U 形槽和曲折线电磁带隙 (EBG) 结构在馈线附近加载。这三个 U 形槽负责在 2.80 GHz（2.53–3.15 GHz，航空服务频段）、3.37 GHz（3.23–3.68 GHz，WiMAX 频段）、4.08 GHz（3.92–4.30 GHz，C 频段）产生三频段陷波卫星下行链路），而放置在馈线附近的 EBG 单元负责分别在 5.95 GHz（5.49-6.19 GHz，C 波段卫星上行链路）创建额外的陷波频带。天线尺寸非常紧凑，为 0.71λ 0 _× 0.8λ ₀ × 0.03λ ₀并使用 ANSYS HFSS 工具在 FR4 基板上建模。天线无需任何额外布置，其阻抗带宽范围为 2.9 至 10.5 GHz，可适当满足 UWB 应用的要求。然而，所提出的天线集成了 U 形槽和 EBG 单元，在不影响单极天线性能的情况下，过滤掉了工作频段内的四种不同的陷波频率。此外，所设计的天线尺寸紧凑，性能提高，并具有有效的陷波控制能力。此外，制造的原型的测量性能与模拟的对应物非常吻合。