一种新型超宽带双陷波平面单极子贴片天线设计

设计一种新型双陷波超宽带单极子贴片天线,辐射贴片为酒杯型天线结构,采用对底部边缘开槽曲流的办法,实现了良好超宽带天线性能。同时对辐射贴片加载了U形和C形缝隙,分别在3.5 GHz和5.5 GHz处产生陷波。利用HFSS软件对所设计天线进行仿真验证,仿真结果与实测结果表明,该天线在超宽带范围内能有效抑制双陷波能力,并且在通带范围有良好辐射和稳定增益特性。其天线尺寸为33 mmX26 mmX0.74 mm,便于集成在电路系统中。     

超宽带阶梯形微带单极子天线的设计与研究

针对当前已有超宽带(ultra-wideband,UWB)微带单板子天线带宽窄、尺寸大等缺陷,设计了一款小型化UWB阶梯形微带单极子天线,采用开槽的矩形辐射贴片、阶梯形微带馈电线和缺陷地面结构(defected ground structure,DGS)实现良好的UWB特性.对天线的回波损耗、电压驻波比(voltage...     

微带环形平面双频超宽带天线设计

提出了一种微带双频UWB天线的设计,结合ADS,HFSS仿真工具;对天线结构进行理论优化并通过大量仿真对天线尺寸进行调整;优化出适合UWB FCC提出的3.1-10.6GHz频带范围的双频微带天线,此天线的优点不需要任何加载,结构简单;仿真结果表明天线性能良好,满足一定的带宽需求。     

一种新型超宽带双陷波平面单极子贴片天线设计

设计一种新型双陷波超宽带单极子贴片天线,辐射贴片为酒杯型天线结构,采用对底部边缘开槽曲流的办法,实现了良好超宽带天线性能。同时对辐射贴片加载了U形和C形缝隙,分别在3.5 GHz和5.5 GHz处产生陷波。利用HFSS软件对所设计天线进行仿真验证,仿真结果与实测结果表明,该天线在超宽带范围内能有效抑制双陷波能力,并且在通带范围有良好辐射和稳定增益特性。其天线尺寸为33 mm×26 mm×0.74 mm,便于集成在电路系统中。     

一种具有陷波特性的多模态频率可重构UWB天线

为了应对在超宽带(Ultra-Wide Band, UWB)系统中频率可重构天线尺寸偏大、模式单一等问题,提出了一种具有陷波特性的多模态频率可重构UWB天线。该天线通过在圆形单极子的辐射贴片上添加T型枝节和刻蚀I型槽、倒U型槽,以获得UWB覆盖范围为2.7～11.6 GHz的宽阻抗带宽,并产生四个陷波带。仿真与实测表明：控制PIN二极管的偏置状态,可以实现单频段、双频段、三频段、四频段和五频段共五种频段下八种工作模式的多模态切换。此天线大小为16 mm×19 mm,较传统单极子天线体积减小了40%以上,实现了小型化。天线的最大增益为4.13 dBi,具有良好的辐射特性。     

超宽带带阻平面天线的快速化设计

提出了一种小型化,低剖面,同时具有带外抑制(WLAN)的平面UWB天线.该天线包括了一个菱形的辐射贴片,它的工作带宽大约为10GHz,覆盖了3-13GHz的频带,并且在5GHz到6GHz处形成了一个阻带.仿真优化了天线的性能指标包括电压驻波比,辐射方向图和增益.该天线采用的介质基板是FR-4,尺寸为25×35mm,由微带线馈电.该天线很容易和微波电路集成,且制造成本低.最后再通过CAD快速化设计其结构.     

Bi-directional UWB MIMO Antenna for Superior Spatial Diversity,and/or Multiplexing MIMO Performance

In this paper, a two-element UWB MIMO antenna with bi-directional radiation pattern is designed for superior UWB MIMO performance. The designed antenna adopts asymmetric coplanar waveguide ground feeding. The proposed antenna ECC is lower than the ECC of its omni-directional peer antenna. Simulated and measured ECC is lower than 0.016 over the entire ultra-wide bandwidth (3.1–10.6 GHz). The isolation between elements of the designed antenna is 20–25 dB exceeding the average in recently published works. The designed antenna has a diversity gain of almost 10 dB and average multiplexing efficiency of 85% over the entire ultra-wide bandwidth. The antenna preserves radiation efficiency higher than 0.96 and gain 3 dB. The diversity performance of the proposed UWB MIMO antenna is proven through real rich-multipath indoor environment measurements. Stationarity of the elected channel is evaluated through 100 successive measurements separated by a 3-min period for 5 h long. The measured spatial correlation coefficients are much lower than 0.5 in different scenarios.     

Design of an Ultra‐Wideband Antenna Using a Ring Resonator with a Notch Function

This paper describes an ultra‐wideband (UWB) antenna that uses a ring resonator concept. The proposed antenna can operate in the entire UWB, and the IEEE 802.11a frequency band can be rejected by inserting a notch stub into the ring resonator. The experiment results indicate that the measured impedance bandwidth of the proposed antenna is 17.5 GHz (2.5 GHz to at least 20 GHz). The proposed UWB antenna has omnidirectional radiation patterns with a gain variation of 3 dBi (1 dBi to 4 dBi).     

一种超宽带地板开槽单极子天线的设计

研制了一款超宽带印刷单极子天线。通过在接地板和单极子贴片底部开槽,展宽了天线频带,改善了天线带内特性,提高了天线增益。采用HFSS软件进行仿真,对天线模型参数进行优化,达到最佳设计效果。结果表明,改进后的天线-10 dB阻抗带宽为2.2~14.6 GHz,比原不开槽天线的-10 dB阻抗带宽增加了7.2 GHz。天线实现了小型化超宽带的同时,在整个超宽带匹配频段内,具有良好的驻波和方向图特性,在超宽带设备中有着很好的应用前景。     

一种新型的双陷波特性超宽带天线的设计

提出了一种新型的具有双陷波特性的超宽带天线。该天线在2.8～12 GHz 的宽频带范围内电压驻波比(VSWR)小于2,通过在馈线上引出两个枝节获得了3.3～3.9 GHz 和5～6 GHz 的双陷波特性。通过调节枝节的长度和宽度可以很容易的调节阻带的位置和宽度。仿真和测试结果表明这种新型的天线具有良好的阻抗特性和辐射特性。该天线结构简单,易于加工,便于集成。文中给出了天线的设计以及不同参数对天线性能的影响     

两种宽缝超宽带天线的脉冲波形保真度比较

设计了两种小型宽缝结构超宽带天线,一种采用接地CPW馈电方式,另一种采用带状线馈电方式。结果表明这两种天线都有较宽的阻抗带宽。分析了两种天线的特性参数,并比较两种天线的增益和辐射特性,给出两种天线在远区场的脉冲波形比较,并得出不同天线结构对脉冲波形的保真度的影响,这对实际超宽带脉冲天线的设计与应用意义重大。     

12–20GHz的TSA天线

该文设计并实现了一个用于超宽带(UWB)系统的TSA天线.计算结果与测量结果表明:工作频段为12-20GHz;天线的半功率波束宽度大于40(,方向图随频率的变化很小;天线的最大增益随频率增大而变化,基本呈增大趋势.该TSA天线基本满足UWB系统对天线的要求.     

一种新型的超宽带树形天线

提出了一种新型的双分枝树形超宽带天线,该天线是在矩形树形天线基础上由阶梯形缺口构成,采用了部分接地面技术和分形概念,测量结果表明天线的输入阻抗带宽达71.4%(2.7～5.7 GHz),同时数值仿真表明阶梯形缺口有利于天线阻抗匹配的改善,该天线为全向辐射,方向图与偶极子天线类似,天线增益为2.16～4.49 dB(3～5 GHz),与矩形树形天线相比,双分枝树形辐射单元面积减少28.5%。     

Ultra-wideband antipodal slot antenna with improved radiation performance

A novel antipodal wide-slot antenna for ultra-wideband (UWB) applications is proposed and studied in detail. The antenna is fed by a microstrip line terminated with a rectangular tuning patch. An antipodal structure is employed to improve the radiation performances. The return losses, surface E-field, current distribution, radiation patterns and gains of the antenna are numerically and experimentally investigated. Results show that the proposed antipodal antenna has an impedance bandwidth from 0.79 to 4.0?GHz, which is about 5:1. Compared with conventional rectangular wide-slot antenna, more stable radiation pattern with lower cross-polarisation level and flatter gain variation over a 3:1 bandwidth can be obtained. Thus, the proposed antenna should be more suitable for future UWB-multiple-input multiple-output applications using polarisation diversity than conventional UWB rectangular slot antennas.     

Design of novel ultra-wideband antenna with individual SRR

A novel small ultra-wideband antenna (UWB) design using an individual split-ring resonator and coupled microstrip line structure is proposed. The radiation property of the antenna is numerically simulated and experimentally measured. The absolute frequency band, where S11 is less than 210 dB, is found to be across the entire UWB spectrum from 3.6 to 14.6 GHz. The gain at every frequency for the antenna is larger than 2.4 dBi.     

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.     

Compact linear tapered slot antenna for UWB applications

A novel ultra-wideband (UWB) antenna consisting of a linear tapered slot in the ground plane and a microstrip to slotline transition is investigated. The antenna possesses a wide bandwidth from 2.95?14 GHz for |S₁₁| < - dB and shows stable radiation patterns with an average gain of 3 dBi throughout the band. Measured group delay and transmission characteristics indicate that the antenna has good pulse handling capabilities.     

具有双带阻特性的超宽带缝隙天线

设计了一款微带馈电的超宽带缝隙天线,整体尺寸仅有30 mm×30 mm×1.6 mm,在3.08～11 GHz范围内驻波比小于2,可覆盖超宽带频段.为了实现对WiMAX和WLAN频段的陷波,分别在地板和馈线上蚀刻不同缝隙,仿真结果表明:在3.2～3.7 GHz,5 ～5.9 GHz驻波比大于2,增益显著下降,而在通带内仍然保持良好的全向辐射特性和稳定的增益.该天线结构简单、性能优良,能广泛应用于超宽带通信系统中.     

新型集成超宽带开槽天线的研制及其应用

研制出一种用于超宽带短脉宽射和接收的新型集成超宽带槽天线，该天线采用共面波导到槽线的宽带过渡方式馈电，实验结果显示了其高保真的宽带特性及高增益高效益特性。利用所研制的ＵＷＢ天线建立起超宽超带雷达实验系统，测量几种简单目标特性及涂层目标特性，证明了该种天线可用作实际的ＵＷＢＲ天线。     

Ultra-Wideband Compact Circularly Polarized Antenna

In this research work, a circularly polarized (CP) monopole antenna is designed for Ultra-Wideband (UWB) applications. The CP UWB antenna is be made up of a reformed ring patch and ground plane. The slots and stubs are inserted in the ground to achieve CP in the UWB antenna. This antenna attained an Axial Ratio Bandwidth (ARBW) of 5 GHz (4.0–9.0 GHz) that lies in the UWB frequency range that is from 3.1 to 10.6 GHz. The designed antenna has a radiation efficiency of around 80% for the complete UWB frequency range. The CP UWB antenna is designed and fabricated using the FR4 with a compact size of 32?×?30?×?1.6 mm³ and with a peak gain of 6.8 dBi. Tested results are in good resembles with simulated ones.