共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
3.
设计了一种十字交叉耦合型结构的左手材料,左手材料构成的超宽带陷波滤波器通带范围为3.16~11.84GHz,陷波范围为7.01~8.56GHz。针对现有平面天线设计难、体积大和滤波性能低等问题,将左手材料的滤波器加载于两款结构简单、易于加工的平面天线上,构成基于左手材料的超宽带滤波天线。相比于现有平面天线,该滤波天线同时具有辐射和滤波功能。经HFSS软件仿真和计算得出该滤波天线工作在超宽带范围内,X波段陷波处回波损耗可达-1.30dB,实现了超宽带天线集成化、小型化的设计。 相似文献
4.
5.
6.
7.
随着无线通信和雷达系统的不断完善发展,对天线性能提出了体积小、重量轻、制作简单和宽频带等特性要求,超宽带天线技术应运而生。通过介绍超宽带贴片天线的技术特性、研究现状及趋势,提出了一种特有的超宽带贴片天线设计方案。简要介绍了Ansoft HFSS仿真软件,且用其对回波损耗和远场辐射图进行仿真及优化设计,使得设计的天线的带宽大致在1.50~11.50GHz范围内,且在WLAN频段达到了良好的陷波特性,有效地抑制了超宽带通信与窄带通信之间的潜在干扰,实验结果表明该设计满足了超宽带的频带要求。本文网络版地址:http://www.eepw.com.cn/article/164389.htm 相似文献
8.
给出了一种小型化超宽带微带天线,该天线采用微带线对半圆形和矩形组成的阶梯状辐射单元进行馈电,基板背面为相似形缺陷地结构窗口。天线参数采用电磁仿真软件CST进行仿真和优化。所设计的小型化超宽带微带天线相对带宽达144.9%(2.15~13.47GHz),带内回波损耗均在-10dB以下,整个工作频段内天线的增益平均在4dB以上,天线的辐射方向图形状在频带内基本保持不变。该天线具有结构紧凑和形状简单的特点,易于加工和集成。最终实际制作了天线样品,并进行了测试,实测数据与仿真结果吻合良好。实验结果表明该微带天线具有良好的小型化和超宽带特性。 相似文献
9.
10.
设计了一款栅栏形式的“V”型结构超宽带多入多出(MIMO)天线,将对角线上的2个基本天线单元置于介质板的另一侧,并引入一种栅栏形式“V”型结构的耦合器来降低天线单元间的耦合,用于改善天线的隔离度。该天线工作频段为3.3~12.02 GHz。经过对回波损耗和隔离度的仿真和测试,证明该款MIMO天线在不影响超宽带(UWB)天线基本性能的基础上满足了MIMO天线对隔离和分集增益的要求。 相似文献
11.
A simple and successful design method that yields a wideband and compact antenna without a ground plane is proposed. The antenna, referred to as the folded loop antenna, can, with the right parameters, achieve wideband characteristics. Calculated and measured results agree well and more than 50% bandwidth (return loss /spl les/-10 dB) is obtained. 相似文献
12.
将缺陷型一维光子晶体应用在微带天线上,设计了一款工作在0.2 THz 频段处的光子晶体微带天线,并且利用基于有限元法的三维电磁仿真软件 HFSS 以及软件 Origin 进行模拟仿真及作图。研究表明:光子晶体微带天线的增益可以达到9.3 dB,与普通微带天线相比增益增加了2.5 dB。并且讨论了光子晶体的周期层数对微带天线的影响,发现光子晶体周期层数为3层时,天线的回波损耗最低。然后以周期层数为3层的光子晶体微带天线为例,讨论了不同的光子晶体与微带天线的距离对天线的增益和回波损耗的影响。 相似文献
13.
14.
设计了一种基于腔结构的双模偶极子天线,其频率在2.44GHz和4.38GHz,利用MEMS开关实现双波段的操作.根据偶极子天线原理,设计了单模微带偶极子天线,使用开关结构将两个单模偶极子天线连接在一起,实现了双模天线的功能.利用三维电磁场软件HFSS分析了设计结构,包括开关、天线,在0~10 GHz得出开关性能插入损耗在-1dB以下,天线回波损耗在-26dB以下.频率为2.44GHz时、回波损耗为-13.2dB、2dB的辐射效率为89%,频率为4.38GHz时,回波损耗为-21.9dB、3dB辐射效率为96%,带宽都在0.5GHz左右. 相似文献
15.
In this paper, a simple transmission line model for an edge‐coupled patch antenna is presented. The coupled section is modeled with a lump network which represents the mutual admittance between patches and from patch to ground. Theoretical analysis of two edge‐coupled patch antenna models are compared by simulation and experiment in antennas designed to operate at the 2 GHz band. The proposed model predicts the return loss of the antenna accurately. 相似文献
16.
Surendra K. Gupta Manish Sharma Binod Kumar Kanaujia Abhishek Gupta Ganga Prasad Pandey 《Wireless Personal Communications》2014,77(1):633-647
In this paper a novel structure of annular ring loaded stacked circular patch microstrip antenna is theoretically analysed to observe various parameters such as return loss, input impedance, gain, directivity and radiation pattern. It is found that antenna possess three band of operation which signify the compactness and multiband operation of antenna. The antenna is resonating at three operating frequencies 1.720, 2.950, 3.060 GHz. The proposed theory is verified by simulation using Ansoft’s HFSS and theoretical results are in good agreement with simulated results. The antenna is useful for multi-services operations such as WLAN, GSM, UMTS, and WiMAX services. 相似文献
17.
18.
Ashraf A. Adam Sharul Kamal Abdul Rahim Kim Geok Tan Ahmed Wasif Reza 《Wireless Personal Communications》2013,69(2):535-549
This paper presents a new design of an elliptical disc monopole antenna for ultra wideband (UWB) applications. The antenna is fed by a 50 Ω microstrip line and printed on a dielectric FR4 substrate of permittivity ε r = 4.7 and height h = 1.6 mm. The optimization on the planar elliptical disc monopole has been presented to accomplish an ultra wide 10 dB return loss bandwidth. The design includes a half-modified circular ground plane with two short I-shaped sleeves in the middle to enhance the S-parameter characteristics across the whole UWB frequency band. Furthermore, compared to a simple rectangular shaped ground plane, the proposed design enhances the bandwidth and improves input return loss. The obtained results confirm that the proposed antenna achieves greater than 90 % radiation efficiency, better than 10 dB return loss, and 0.1 ns group delay in the frequency range of 3.1–12 GHz. The parameters, which affect the performance of the antenna with respect to frequency domain and time domain characteristics, are investigated also. In addition, the proposed antenna is fabricated and the simulation results are compared to the measurement results to prove the superiority of the antenna. 相似文献
19.
为了克服正交磁环天线结构误差角造成的测向角度(测角)误差较大的问题,该文提出一种结构上改进的三磁环测向天线设计方案。阐述了两两呈60°夹角磁环嵌套结构的三磁环天线的测向原理,建立了三磁环天线测角误差关于结构误差角的仿真模型。仿真分析表明,在相同结构误差角的条件下,相比正交磁环天线,三磁环天线测角误差最大值理论上能够降低50%。低频(f<200 kHz)情况下的对比实验结果表明,相比于正交磁环天线,三磁环天线测角误差最大值降低65%,测角误差总体优化约50%,实验与仿真结果符合较好。 相似文献