Compact UWB Antenna with High Rejection Triple Band-Notch Characteristics for Wireless Applications

In this paper, small printed flower-shape triple notch ultra-wideband (UWB) monopole antenna with high band rejection is presented. Notch bands include WiMAX (IEEE802.16 3.30–3.80 GHz), WLAN IEEE802.11a/h/j/n (5.15–5.35, 5.25–5.35, 5.47–5.725, 5.725–5.825 GHz), and X-band downlink satellite system (7.1–7.9 GHz). By including inverted T-shape stub and etching two C-shaped slots on the radiating patch, triple band-notch function is obtained with measured high band rejection (VSWR = 14.52 at 3.58 GHz, VSWR = 15.88 at 5.69 GHz and VSWR = 6.95 at 7.61 GHz) and covers a UWB useable fractional bandwidth of 114.30% (2.74–10.57 GHz = 7.83 GHz). In short the antenna offers triple band-notch UWB systems as a compact multifunctional antenna to reduce the number of antennas installed in wireless devices for accessing multiple wireless networks with wide radiation pattern. The proposed antenna has a small size of about 0.25λ × 0.30λ at 4.2 GHz (first resonance frequency), which has a size reduction of 30% with respect to the earlier published antenna. Both the experimental and simulated results of the proposed antenna are presented, indicating that the antenna is a good candidate for various UWB applications.

     

Compact Coplanar Waveguide-fed Planar Antenna for Ultra-wideband and WLAN Applications

A novel compact planar antenna is presented for Ultra-wideband (UWB) applications in this paper. The proposed antenna has rectangle-like slot and it is fed by coplanar waveguide. The antenna is printed on FR4 substrate and it has compact size of $28 \times 31 \times 0.8 \,\,\text{ mm}^{3}$ . Parametric study is performed on the antenna by investigating the effect of various geometrical parameters on the frequency characteristics. The antenna is fabricated and measured. It has better return loss response and stable gain over the entire UWB band. The antenna has stable radiation pattern and good impedance matching over entire ultra-wide bandwidth of 3–10.6 GHz. The results show that there is good agreement between measured and simulated results. Various features such as compactness, simple configuration and low fabrication cost make the antenna suitable for UWB and wireless local area network systems.     

一款多频段小型单极子天线的设计

设计了一款多频段小型宽带单极子天线。采用Ansoft公司的HFSS13电磁仿真软件,对天线进行了仿真及优化,天线尺寸为39mm×29mm×1.7mm,该天线在多个频率点上谐振。仿真结果表明,该天线参数S11≦-10 dB,天线和馈线匹配的很好,覆盖了LTE2300,LTE2500和WLAN的2.4/5.2/5.8 GHZ及WiMAX的2.5/5.5 GHz的工作频段,适于目前的超薄智能手机。     

A Design of Planar Monopole Antenna for Wireless Applications

Wireless Personal Communications - This paper demonstrates the design of a planar monopole antenna with reduced size and high gain for wireless applications. In this design, a partial ground plane...     

Triple Band Dual Polarized CPW-Fed Planar Monopole Antenna

Wireless Personal Communications - This article presents a novel, simple and planar design of a CPW-fed tri-band and dual polarized monopole antenna. The proposed structure includes inverted...     

超宽带印制矩形单极天线设计

针对超宽带通信应用,研究影响印制单极天线阻抗带宽的主要因素,设计基于微带馈电的小型化印制矩形单极天线。按照等效性原理,采用黄金分割比设计矩形振子体;通过接地面上端引入渐变梯形或凹形结构,同时调整馈入端接地面间隙,可实现印制矩形单极天线的超宽带特性。对具有渐变梯形或凹形接地面结构的微带馈电矩形印制单极天线结构进行优化,仿真结果表明,前者的阻抗带宽为2.96～17.94GHz,后者的阻抗带宽为2.9～13.3GHz,而两者的辐射方向基本保持不变。实测结果与仿真结果基本一致,达到了超宽带通信应用的要求。     

一种新颖的应用于无线局域网的小型化单极子天线

给出了一个新颖的三频工作的单极子天线,并可以应用于无线局域网。这个天线由对称结构和地板组成,它们分别印刷在介电常数为4.4、厚度为1.6 mm 的FR4 介质板的两面,并且采用微带线的馈电方式。这个天线有着小型化尺寸26 mm×20 mm×1.6 mm。测量结果显示,低频和高频的-10 dB 阻抗带宽分别为2.3-2.5 GHz 和4.7-6.8 GHz;这个 带宽覆盖了2.4/5.2/5.8 GHz 无线局域网工作频段。同时得到了较好的全向方向图。这个天线的低频和高频的平均增益分别为2dBi 和3.7dBi。     

平面三频单极子手机天线设计

提出一种平面三频单极子手机天线,该天线通过对天线辐射贴片进行弯折、开缝等手段在单一天线上实现三频。天线的工作频段完全覆盖了GSM900M（890MHz~915MHz）,DCS1800M（1.71GHz~1.88GHz）,Bluetooth（2.4 GHz~2.48 GHz）的所有频率,工作性能良好。该天线结构易于实现,便于集成,适合在移动通信中大规模使用。     

Superwideband Triple Notch Monopole Antenna for Multiple Wireless Applications

Wireless Personal Communications - In this paper a CPW-fed triple band notch characteristics superwideband antenna is presented for multiple wireless applications. Proposed antenna consists of...     

小型化超宽带印刷单极子天线

该文提出一种小型化超宽带印刷单极子天线,阻抗带宽为3．17～50GHz。该天线采用圆彤单板子为辐射结构,利用共而波导馈电方式．天线的尺寸为30×32×1．6mm,通过适当地调整板尺寸和阋形辐射单元的半径,可以使天线得到很好的阻抗匹配。与以往的天线相比,带宽更宽,尺寸更小,天线具有良好的辐射性能,达到了小型化的婪求．可为将来的超宽带通信应用提供良好的选择。     

小型化超宽带平面单极天线的设计

针对超宽带系统对天线小型化及宽带化的要求,基于平面单极天线模型,采用辐射单元开圆形槽及缺陷接地板结构,提出了一种反L形接地板结构的超宽带平面天线。仿真分析表明,该天线谐振特性良好,阻抗带宽达到了12GHZ,同时天线体积仅为20mm 20mm 1.6mm,实现了小型化,且结构简单,易于加工及集成,适合未来无限通信发展的需求。     

Printed Planar Monopole Antenna Design for Ultra-Wideband Communications

This paper presents an ultra wideband (UWB) planar printed monopole antenna fed by microstrip line. The antenna configuration contains a beveled ground plane. The beveled partial ground plane improves the impedance bandwidth. The measured frequency response demonstrates that the fabricated antenna exhibits an impedance bandwidth of 7.9 GHz over 3.1 to 11 GHz for VSWR < 2. The proposed antenna has ultra-wideband characteristics with omnidirectional radiation pattern and stable gain. Ultra-wideband performance of the proposed antenna is examined through the simulated surface current distributions. Measured results confirm that the antenna is suitable for UWB applications due to its compact size and high performance characteristics.     

一种新型超宽带平面单极天线的设计

提出了一种新型超宽带平面单极子天线。该天线由一个倒置的月牙形金属贴片和一个槽口金属接地板构成,采用微带线对其进行馈电。通过数值仿真和实验测量,该平面结构的单极天线具有超宽带性能,实测天线的-10dB回波损耗的频率覆盖范围为3．2～1．8GHz,相对带宽达115％,阻抗带宽达到3．6倍频。且该天线体积小、结构简单、加工简便,适合应用于短程超宽带通信系统。     

Design of a Planar Ultrawideband Antenna With a New Band-Notch Structure

A novel planar ultrawideband (UWB) antenna with band-notched function. The antenna consists of a radiation patch that has an arc-shaped edge and a partially modified ground plane. The antenna that makes it different from the traditional monopole antenna is the modification in the shape of ground plane, including two bevel slots on the upper edge and two semicircle slots on the bottom edge of the ground plane. These slots improve the input impedance bandwidth and the high frequency radiation performance. With this design, the return loss is lower than 10 dB in 3.1-10.6 GHz frequency range and the radiation pattern is highly similar to the monopole antenna. By embedding a pair of T-shaped stubs inside an elliptical slot cut in the radiation patch, a notch around 5.5 GHz WLAN band is obtained. The average gain is lower than -18 dBi in the stopband, while the patterns and the gains at frequencies other than in the stopband are similar to that of the antenna without the band-notched function.     

低雷达截面的超宽带双环单极子天线

介绍了研制的一种新型可用于雷达低可见平台的超宽带双环单极子天线.该天线利用由金属通孔连接的 2 个环状结构作为辐射单元,利用两边倒有 90°圆弧角的矩形结构设计辐射地板.辐射单元和辐射地板印制在介电常数为 2.65 的介质材料板上.对天线的辐射和散射特性做了研究,并与参考天线作对比,发现在同样满足超宽带天线的相关指标要求下,文中提出的天线具有良好的雷达截面减缩效果.说明由金属通孔连接的双环结构辐射单元结构可使天线同时具有超宽工作频带和低雷达截面的特性.     

一种新型陷波特性超宽带天线设计

为了满足现代通信的需求,设计了一种新型的超宽带平面天线,实现了良好的超宽频带阻抗匹配.该天线的辐射贴片与接地板结构相似,通过在辐射贴片上加载U型槽以及在馈线一侧加载新型陷波结构分别在中心频率3.5 GHz和5.5 GHz处产生陷波.天线实测与仿真结果基本相近,通带内辐射效果良好,且该天线对WIMAX及WLAN波段有很好的抑制功能,可用于超宽带系统.     

一种小型双陷波超宽带天线的设计

设计了一种小型双阻带的超宽带天线。采用由两个半椭圆和一个长条矩形复合的一种新型地板结构,从而实现了超宽带天线小型化。通过开双U型缝隙实现了双阻带特性,阻带带宽分别是540 MHz和610 MHz。天线实物测量结果表明,天线驻波比＜2的带宽为2.7~12 GHz,在整个频段内天线增益较高,同时方向图全向特性良好。天线的测量结果和仿真结果有较好的一致性。     

一种宽频UWB平面单极子贴片天线设计

目前超宽带无线通信已成为研究的热点,基于此提出了一种小型超宽带酒杯形单极子天线结构,对地板采用做一对切角形处理,提高了宽频天线性能,对其他参数影响不大。通过数值模拟,天线主抗带宽为3.10～11.45 GHz,覆盖了FCC建议的频段。在辐射方向图E面和H面具有良好方向图稳定性,基本满足了超宽带通信对天线的要求。     

一种新型UWB平面单极子微带天线阵的设计

提出了一种新型平面单极子微带天线阵,以平面矩形单极子天线为原型,通过改变辐射贴片的形状实现对原有天线性能的优化。设计了中心频率为2.4 GHz,相对带宽是42%,增益达13 dBi的宽频带四单元平面单极天线阵。通过仿真与实验表明,该天线在1.93 GHz~2.93 GHz频带内反射系数均小于-10 dB。     

具有双陷波特性的超宽带平面天线设计

设计了一种带有2个陷波频段的超宽带天线。天线的缝隙和馈电枝节采用相反的梯形结构,以实现较好的阻抗匹配。通过在宽缝隙中增加2个线形枝节和1个"E"形结构,使得天线在3.0 GHz~3.9 GHz和5 GHz~6 GHz 2个频段内出现频率阻断。根据天线的阻抗曲线,给出等效谐振电路并对陷波产生的原理进行了分析。最后对天线的远场辐射特性进行分析和阐述,测试结果良好,达到了陷波超宽带天线频率阻断的效果。