共查询到19条相似文献,搜索用时 93 毫秒
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随着对超宽带平面天线的研究和广泛应用,在超宽带天线中实现对其他无线通信设备特别是WLAN设备的干扰抑制成为近年来的研究热点。介绍了陷波特性超宽带天线的技术背景,对近几年国内外关于陷波超宽带天线的最新研究成果进行了分析总结,研究成果对超宽带天线的设计和频带的抑制具有一定的指导作用。最后对无线通信中超宽带天线的发展趋势进行了展望。 相似文献
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通过在超宽带印刷单极子天线上开设不同形状和尺寸的缝隙,设计了一种由共面波导馈电的,具有双频陷波特性的超宽带天线.并且通过对天线仿真结果的分析,总结出了缝隙结构参数对天线陷波特性的影响规律.仿真和实测结果表明,除陷波频带外,天线在3.1到10.6GHz频带上的VSWR小于2,在3.4-3.77GHz和4.91-5.87GHz频段上具有良好的陷波特性,较好地避免了系统与WiMAX及WLAN之间的干扰.在非陷波频段上天线具有较好的全向辐射特性.此外,通过对天线表面电流分布情况的详细分析,推导出了天线的等效电路结构. 相似文献
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设计了一个基于圆环型互补开口谐振环(CSRR)结构的双陷波超宽带天线。通过在超宽带天线的辐射体上蚀刻圆环形CSRR结构实现了双陷波特性,对CSRR结构实现陷波特性的机理进行了分析。测量结果表明,天线在超宽带系统3.1~11.0GHz工作频段内的电压驻波比小于2,在WiMAX和WLAN频带内具有良好的陷波特性。天线体积较小,便于加工,适用于超宽带天线单元。 相似文献
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师娅楠张斌珍段俊萍徐永庆徐洪成 《固体电子学研究与进展》2018,(4):268-273
设计了一种新颖的具有双陷波特性的新型超宽带天线。通过在径向贴片上添加弧形寄生单元和馈线上刻蚀U型槽相结合的方法实现天线的双陷波特性。利用仿真软件对天线不同参数进行仿真分析得到了天线的最优尺寸。并且结合加入陷波结构前后天线表面电流分布与输入阻抗曲线得到了天线的等效电路,定性地解释了陷波特性的工作原理。仿真和测试结果表明,天线在通带2.54~11.22GHz的频段范围内满足电压驻波比小于2,在WiMAX和WLAN两个频段内实现了良好的陷波特性,且尺寸小、辐射特性良好,对超宽带系统的应用具有一定的参考价值。 相似文献
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文章设计了一种具有陷波特性的超宽带印刷天线,使用高频结构仿真软件HFSS11.0对天线尺寸进行仿真和优化,对天线的阻抗特性、方向图进行了研究.仿真和测试结果表明,该天线在2.3GHz-5GHz和5.9GHz~12.6GHz的工作频段内电压驻波比小于2,且具有稳定的方向图;在5GHz~5.9GHz的阻带范围内具有良好的陷... 相似文献
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提出一种具有双陷波特性的燕尾形平面超宽带天线.天线的辐射体和地板分别采用椭圆和梯形的渐变结构,具有良好的宽带阻抗匹配特性.通过在辐射体上嵌入两种不同类型的缝隙,使天线具有双陷波功能.计算和实测结果表明,天线在通带(2~3.2GHz、4.3~5.3GHz和6.2~14GHz)频段范围内满足电压驻波比小于2,在3.2~4.3GHz和5.3~6.2GHz两个频段内同时具有陷波特性,并且,天线在通带频段内呈现良好的辐射特性.文末结合天线的实测阻抗曲线给出了一个概念性电路,定性地解释了陷波特性的工作原理. 相似文献
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小型平面超宽带天线的研究进展 总被引:5,自引:0,他引:5
对小型平面超宽带(UWB)天线的研究现状进行了分析总结.首先介绍超宽带无线通信的技术背景,描述了超宽带天线的几种常见定义.然后分别对小型超宽带印刷单极子天线的设计、小型超宽带缝隙天线的设计、具有陷波功能的小型超宽带天线的设计进行了详细的评论,并讨论了超宽带天线的性能评价方法.最后展望了小型平面超宽带天线的未来研究方向. 相似文献
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《Antennas and Propagation, IEEE Transactions on》2008,56(9):2894-2902
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Abdo AbdelMonem Shaalan M. I. Ramadan 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(8):958-968
This paper presents two design compact hexagonal monopole antennas for ultra-wideband applications. The two antennas are fed
by a single microstrip line . The Zeland IE3D version 12 is employed for analysis at the frequency band of 4 to 14 GHz which
has approved as a commercial UWB band. The experimental and simulation results exhibit good agreement together for antenna
1. The proposed antenna1 is able to achieve an impedance bandwidth about 111%. The proposed antenna2 is able to achieve an
impedance bandwidth about (31.58%) for lower frequency and (62.54%) for upper frequency bandwidth. A simulated frequency notched
band ranging from 6.05 GHz to 7.33 GHz and a measured frequency notched band ranging from 6.22 GHz to 8.99 GHz are achieved
and gives one narrow band of axial ratio (1.43%). The proposed antennas can be used in wireless ultra-wideband (UWB) communications. 相似文献
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超宽带天线和可重构天线是当今天线领域研究的热点。将可重构天线技术应用到超宽带天线设计中,讨论了频率可重构超宽带天线的设计思路。以印刷单极子椭圆天线为原型,给出了两个可重构天线的具体结构,并对天线进行了可重构带阻设计,避免与相关频段之间的干扰。仿真结果表明:重构后天线Ⅱ的低频获得了扩展,其相对尺寸的长和宽分别减小到最大工作波长的0.116倍和0.087倍,工作频段为0.174~10.9GHz,可重构阻带为5.1~5.95GHz,带宽比可高达62:1. 相似文献
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Wen-jun Lui Chong-hu Cheng Hong-bo Zhu 《Antennas and Propagation, IEEE Transactions on》2007,55(9):2445-2450
An improved frequency notched ultrawideband (UWB) microstrip slot antenna with a square ring resonator embedded in the tuning stub is proposed. The antenna is investigated numerically and experimentally for its impedance matching property, frequency notched characteristic and radiation performance in detail. As will be reported, compared with conventional frequency notched slot antennas, after incorporating a square ring resonator with the slot antenna's tuning stub, high, sharp band-rejection characteristic of over 20 dB is achieved, which is improved significantly. 相似文献
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A mixed model of two-dimensional (2D) genetic algorithm (GA) and finite-difference time-domain (FDTD) is applied to the automatic design of band-notched ultra-wideband (UWB) planar antennas of a finite size. The geometric shape of a band-notched UWB antenna is constructed by the method. Measured return losses, radiation patterns and gains are in good agreement with the designed ones. These results illustrate that the method is valid and a new band- notched UWB antenna is designed successfully in the designated small size. 相似文献
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Mahmoud Bahmani Jalil Mazloum Naser Ojaroudi Parchin 《Wireless Personal Communications》2017,96(1):125-134
Ultra-wideband (UWB) planar antennas with single or multiple notched frequency bands properties have recently been considered for various communications between wireless devices. In this study, a low profile microstrip monopole antenna with double band-filtering function is designed and investigated. FR-4 dielectric with properties of ε = 4.4 and δ = 0.02 has been employed as the antenna substrate. The configuration of the proposed design is composed of a modified fork-shaped radiating patch with inverted Ω-shaped slot and a pair of coupled Γ-shaped parasitic structures, a feed-line and a ground plane. The proposed dual band-notched UWB antenna provides good impedance bandwidth characteristic from 2.89 to 12.43 GHz for VSWR <2 with two notched bands which cover all the 5.2/5.8 GHz of WLAN, 3.5/5.5 GHz of WiMAX and 4-GHz of C bands ranges. The antenna provides good radiation behavior with sufficient gain levels over its operation frequency band. 相似文献
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With quad-notched band characteristic, a compact ultra-wideband (UWB) multiple-input-multiple-output antenna is proposed in the article. There are two identical monopole elements in the system. By inserting symmetrical L-shaped slots, complementary split-ring resonators) and C-shaped stubs in each element, four notched bands are achieved to filter 3.5 GHz WiMAX, 5.25 GHz lower WLAN, 5.8 GHz upper WLAN, and 7.5 GHz X-band. Without decoupling structures, the antennas were placed vertically to obtain high isolation. Results indicate that the antenna operates from 2.6 to 13 GHz except four rejected bands, and port isolation (S21) is better than ?25 dB, envelope correlation coefficient is below 0.002 in UWB spectrum frequency of 3.1–10.6 GHz. 相似文献