Design Analysis of Broadband Stacked Microstrip Patch Antenna for WLAN Applications

Wireless Personal Communications - A novel configuration of stacked microstrip patch antenna is designed, simulated and fabricated for WLAN applications. Return loss is calculated below...     

A Dual Polarized Triple Band Stacked Elliptical Microstrip Patch Antenna for WLAN Applications

In this paper, a single coaxial feed dual polarized triple band stacked microstrip patch antenna for wireless applications is presented. The proposed stacked antenna has two resonating elements with lower layer consisting of a truncated corner square patch and upper layer with an elliptical patch. Both the layers of proposed antenna are printed on RT Duroid^® 5880 substrate (having ?_r?=?2.2). The antenna shows triple band resonance at 4.2, 4.8 and 5.8 GHz with circular polarization behaviour at the first two resonances and linear polarization characteristic in the third resonance respectively. The typical realized gain of proposed antenna is around 7 dB in all three resonating bands.     

一种共面带状线馈电的圆极化双频微带天线

提出一种工作于2.4GHz（圆极化）和5.8GHz（线极化）的双频微带天线,由共面带状线（CPS）馈电。在菱形环中内嵌小方环实现双频工作,菱形环上槽口实现圆极化特性,背面加反射板以提高天线增益。为了实测天线性能和应用于不平衡馈电方式,还设计了CPS至微带线的巴伦。实测结果与仿真结果比较吻合,在2.4GHz与5.8GHz的S11〈-10dB工作带宽分别为33.3%和17.4%,增益分别达到9.05dBi和6.59dBi,2.4GHz频点3dB轴比带宽为15.8%。该天线频带宽、增益高、结构简单、易于集成,可用于无线通信和微波输能系统的整流天线中。     

微带线馈电的宽带单层贴片天线

微带贴片天线已广泛应用于雷达系统,文中介绍了一种新型背腔式单层微带贴片天线,辐射贴片采用微带线馈电,为增加工作带宽,提供了两种不同的贴片形状,第一种是E形贴片,仿真及测试结果表明,此种单元在驻波比优于2的条件下可实现45%的阻抗带宽,但该单元的波瓣带宽较窄。为抑制交叉极化,通过在E形贴片上开四个槽,得到了第二种改进的E形贴片。该单元可实现14%的频带内驻波比优于1.5,同时交叉极化优于-15dB。对C波段8×16单元实验小阵的测试结果表明,该天线在17.9%的频段内具有良好的交叉极化性能及较高的工作效率。     

A New Compact Microstrip-Fed Dual-Band Coplanar Antenna for WLAN Applications

A novel compact microstrip fed dual-band coplanar antenna for wireless local area network is presented. The antenna comprises of a rectangular center strip and two lateral strips printed on a dielectric substrate and excited using a 50 Omega microstrip transmission line. The antenna generates two separate resonant modes to cover 2.4/5.2/5.8 GHz WLAN bands. Lower resonant mode of the antenna has an impedance bandwidth (2:1 VSWR) of 330 MHz (2190-2520 MHz), which easily covers the required bandwidth of the 2.4 GHz WLAN, and the upper resonant mode has a bandwidth of 1.23 GHz (4849-6070 MHz), covering 5.2/5.8 GHz WLAN bands. The proposed antenna occupy an area of 217 mm² when printed on FR4 substrate (epsiv_r=4.7). A rigorous experimental study has been conducted to confirm the characteristics of the antenna. Design equations for the proposed antenna are also developed     

A Novel Elliptical Ring Microstrip Patch Antenna for Ultra-Wideband Applications

This paper proposes a new ultra-wideband (UWB) antenna. The proposed antenna is designed for operation from 3 to 15 GHz. It consists of a Sierpinski fractal based ellipse etched onto the radiating patch and a rectangular defected ground structure in the ground plane. Details of the proposed antenna as well as with variations in design variables are presented and the results discussed.

     

Patch Loaded Slot Antenna for Super Wideband Applications with Dual-Band Notch Characteristic

Wireless Personal Communications - This paper presents a patch loaded slot antenna for super wideband (SWB) application. To obtain SWB characteristic, the proposed antenna geometry combined a...     

Ultra Wideband Co-planer Microstrip Patch Antenna for Wireless Applications

In this paper, a comparative study of co-planar gap coupled rectangular and elliptical microstrip patch antenna is presented. It is analyzed by using circuit theory concept. The proposed antennas show ultra wideband operations which depend on dimensions of the patches, gap between them as well as air gap thickness. It is observed that the performance of gap coupled elliptical patch antenna is better than that of rectangular patch antenna while the area of rectangular and elliptical patches is same. The bandwidth of proposed rectangular patch antenna is found to be 50.7 % with average gain of 6.5 dBi while for elliptical patch antenna the bandwidth and gain further improves up to 57.6 % and 9.5 dBi respectively. The theoretical results are in good agreement with the simulated results obtained from IE3D simulation software.     

一种带有寄生贴片的全向印刷天线

提出了一种带有寄生贴片的全向印刷天线。该天线采用平行双线串馈的方式,以印刷振子作为辐射单元,通过引入寄生贴片,有效地平衡了水平面各个方向的辐射强度,使得水平面不圆度小于0.5 dB,并且改善了阻抗特性,天线VSWR≤1.5 的带宽达到6.6%。     

Design of Wideband Flower-Shaped Microstrip Patch Antenna for Portable Applications

Wireless Personal Communications - Energy consumption and the secure transmission are the increasing fields of research challenge in wireless sensor network (WSN) applications. Heterogeneous WSN is...     

InSb Based Microstrip Patch Antenna Temperature Sensor for Terahertz Applications

Reconfigurable sensing antennas (RSA) play a significant role in modern internet-of-things (IOT) applications. The RSAs are capable of transmiting and receiving electromagnetic waves besides sensing different enviroment parameters. This paper introduces a reconfigurable sensing microstrip patch antenna desinged to sense high temperature variations in harsh environment. The indium antimonide (InSb) semiconductor material is a temperature sensitive material employed in RSA designs in the Terahertz (THz) frequency band. An investigation of the temperature dependency of the electrical properties of the InSb-material is introduced. The proposed sensing antenna introduces high sensitivity of 1.588 GHz shift in resonance frequency per unit change in temperature (Kelvin). The resonance frequency of the InSb sensor antenna is changed according to the surrounding environment temperature from 264 GHz to 502.2 GHz with a broadband tuning range of 90.2%. The InSb patch sensor have temperature sensing range of 150 K starting from 250 up-to 400 K. At 300 K the InSb sensor antenna proposes a peak gain of 6.4 dBi with impedance matching bandwidth of 9.57%. An equivalent circuit consists of five lumped elements is estimated for the InSb sensor antenna using particle swarm optimization (PSO) technique at different temperatures. At T?=?250 K the maximum radiation efficiency is 2.5% and is increased up to 86.3% at T?=?400 K.

     

Trapezoidal Microstrip Patch Antenna Array for Low Frequency Medical Applications

Wireless Personal Communications - This paper presents the design of low cost FR4 substrate trapezoidal patch microstrip feed antenna array for low frequency wireless medical applications....     

宽带双极化微带天线中不同寄生单元的研究

在层叠结构宽带双极化微带天线单元中,常见的是寄生单元和主辐射单元形状相同,尺寸略微不同.目前,寄生单元形状与主辐射单元不同的宽带双极化微带天线结构极少有报道研究.文中提出了2种新型天线结构和2种常见结构,即正方形-圆形、正方形-圆环、正方形-正方形、圆形-圆形4种组合.计算结果表明:不同的单元组合,得到的天线电性能不同,新型结构与常见结构相比,在隔离度和交叉极化电平等性能上较优.     

L 型探针馈电在WLAN 天线设计中的应用

介绍了一种L形探针耦合馈电的天线形式。天线为正交双极化贴片天线,每一个极化由双端口反相合成馈电,具 有隔离度高,工作频带宽,剖面低等特点。阻抗带宽可达25%,隔离度大于30dB,天线的最大高度小于23mm。该天线形 式在实际产品中得到了应用。     

一种新型圆极化贴片天线的研究

研究了圆极化微带贴片天线,通过在普通圆形贴片上开槽,提出了一种结构新颖的圆极化微带贴片天线.仿真以及实测结果表明,该天线具有较宽的3dB波瓣宽度(±50°)和良好的圆极化轴比性能,并且新型微带贴片天线的尺寸要远小于普通的圆形或圆环形贴片天线的尺寸.     

新型光子带隙微带贴片天线

提出一种新型光子带隙(PBG)结构微带贴片天线。在同轴线馈电型微带贴片天线的接地板上蚀刻出新颖PBG结构,通过数值仿真得到有效提高增益的结构。实际制作了PBG结构微带天线,并实测了天线特性参数。数值结果和实验结果进行了比较,取得了较为一致的结果.实测天线增益达8.8dB,比无PBG时提高约3dB,验证了该PBG结构的有效性。     

应用于WLAN/WiMAX的三频段微带贴片天线设计

设计了一种应用在无线局域网络(WLAN 2.4 GHz)和微波存取全球互通(WiMAX 3.5 GHz/1.8 GHz)无线通信领域中的小型化三频段微带贴片天线。结构设计主要通过在圆形贴片上开出一个近似T形槽的方式,该天线结构简单、尺寸小、加工方便、成本低且全向特性理想。为了便于数值分析和优化,在HFSS建立了该天线的电磁仿真模型。其研究表明,实测和仿真的结果吻合良好,该天线在其各频段内的回波损耗＜-10 dB,并具有良好的方向性和增益。在3个工作频带内电压驻波＜2,阻抗匹配特性良好,验证了该设计的合理性。     

用于天线RCS减缩的分形微带贴片天线

本文给出一种分形微带天线在天线雷达散射截面(RCS)减缩中应用的示例.分形结构具有独特的空间填充性能,利用该性能可以探索分形天线在天线RCS减缩中的应用.设计出的分形天线与常规天线的辐射性能进行了比较,可以看出分形天线基本保持了原辐射性能.同时比较了两者的散射性能,可以看出分形天线有一定的RCS减缩效果.本文的内容对天线隐身有一定的借鉴作用.     

High Gain Triple Band Microstrip Patch Antenna for WLAN,Bluetooth and 5.8 GHz/ISM Band Applications

Wireless Personal Communications - A high gain triple bands microstrip patch antenna with modified radiating patch is proposed. Two slits and a T-shaped slot are loaded at the optimum positions on...