共查询到18条相似文献,搜索用时 109 毫秒
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双频贴片天线研究与设计 总被引:2,自引:0,他引:2
无线通信的发展对天线(尤其是贴片天线)的各项性能提出了新的要求。与此同时,双频天线的应用也愈为广泛。总结了贴片天线的主要双频解决方案,包括正交模、多贴片、电抗性加载以及空气缝隙双频贴片等方式,并提出了相应双频贴片天线的适用场合。最后,结合HFSS仿真设计了一个双频双贴片天线,讨论了该天线特性,并对双频天线未来的发展趋势进行了展望。 相似文献
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提出了一种用于双频MIMO天线的谐振器去耦结构。通过双频单极子MIMO天线对该解耦结构进行验证。双频单极子天线分别工作在低频2.4GHz和高频5.8GHz。 双频解耦结构在低频段主要是采用两个反向的π型微带谐振器解耦,高频段主要是采用π型缝隙谐振器解耦。天线采用微带线馈电,解耦谐振器与天线地板印刷在PCB同一面,结构紧凑易于与系统集成,可以广泛应用于物联网通信系统中。 实测结果:双频谐振器去耦结构实现隔离度高于22dB,单极子天线阻抗带宽分别为2.0GHz-3.0GHz和5.0-6.0GHz(S11<-10dB),低频段增益最大增益点1.5dBi,高频段最大增益点3dBi。 相似文献
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文中提出并设计了一款应用于5G微基站的双频双极化电磁偶极子天线,工作带宽完整覆盖了长期演进(long term evolution,LTE)技术的主要频段和5G的全部中频段.该天线首先采用正交放置的渐变式Γ形馈电线对两个交叉放置的电磁偶极子馈电实现双频双极化,随后通过在电偶极子上添加H形缝隙有效扩展了低频段的带宽,最后创新性地引进具有电容性质的圆形寄生贴片将高频频点降低.此外,利用一款添加金属围栏的反射板来改善天线增益和辐射方向图的稳定性.测试结果表明:该天线S11,22 < -10 dB的阻抗带宽为58.2%(2.11~3.84 GHz)和8.9%(4.72~5.16 GHz),端口隔离度(|S12|)高于25 dB,双频段内的平均增益分别为8.7 dBi和7.2 dBi;天线E面的半功率波瓣宽度在整个工作频带内的变化为61°±6°,交叉极化比高于20 dB.仿真与测试结果达到了良好的一致性.该天线结构简单、性能优良,可以作为LTE/5G室内基站天线的良好的候选. 相似文献
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平面双频单极天线研究 总被引:2,自引:1,他引:1
研究了一种小型化的平面双频天线,利用一个斜F加倒L图形结构并通过在天线结构中的电感平衡加载来设计一种平面单极双频天线.它具有接地板小且天线低端谐振点频带宽的特点,为平面双频单极天线的小型化设计提供了一种新的方案. 相似文献
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Compact broadband E-shaped microstrip antennas 总被引:1,自引:0,他引:1
A broadband E-shaped microstrip antenna is discussed. Its bandwidth is further increased by cutting a pair of tapered slots. Using the even-mode symmetry of an E-shaped microstrip antenna, a compact single slot loaded rectangular microstrip antenna is proposed, which reduces the antenna size by half. 相似文献
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一种小型化双频天线的设计与分析 总被引:2,自引:0,他引:2
提出了一种小型化宽频带双频天线的设计。该天线由一个E形微带贴片和一个偶极子天线组合而成,产生高低2个频率,且低频段带宽可控。仿真的-10dB阻抗带宽分别为83MHz(2.4~2.485GHz)和812MHz(5.1~5.912GHz)。能够覆盖IEEE802.11b/g(2.4~2.483GHz)和IEEE802.11a(5.15~5.825GHz)工作频段,并对仿真结果进行了分析。同时给出的设计双频段宽带小型化天线的方法,可以对高低2个频段分开设计,对工程实践有一定的指导意义。 相似文献
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提出了一种基于槽天线的小型化、高隔离度的超宽带(Ultra Wideband, UWB)多入多出(Multiple-Input Multiple-Output, MIMO)天线.该MIMO天线由两个槽天线单元构成, 为了增加天线阻抗带宽, 每个槽天线单元由末端带有圆形贴片的微带线和末端为圆形的槽线两部分耦合馈电.采用在地板上开槽和方向图分集方法, 减少地板表面波和空中电磁波影响, 达到提高天线隔离度的目的.数值仿真和实验结果表明:该天线在3.1~11 GHz频段内满足端口反射系数|S11| < -10 dB, 隔离度|S12|在7~11 GHz频段内小于-25 dB, 在3.1~7 GHz频段内小于-16 dB, 并根据仿真和测试S参数计算了包络相关系数. 相似文献
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介绍了一种用于WLAN(2.45 GHz,5.15~5.85 GHz)和WiMAX(3.50 GHz)3个频段的MIMO天线。该天线包含两个呈直角放置的E型单极子,使其产生3条耦合路径以获得3频特性。两个天线元间放置一个由接地面上凸起的T型隔离单元,降低了天线元间的耦合。仿真结果表明,该天线在其3个工作频段内的回波损耗<-10 dB,且在工作频带内可获得15 dB的隔离度。 相似文献
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A compact Ultra-WideBand(UWB) slot antenna is presented in this paper. The slot is modified rectangular in shape and asymmetrically cut in the ground plane. A hexagonal patch with two stepped CoPlanar Waveguide(CPW) feed is used to excite the slot. Wider impedance bandwidth is achieved due to the extra inductive reactance created by the asymmetric slot which neutralizes the capacitive reactance of the hexagonal patch. The measured impedance bandwidth of the proposed antenna is 11.85 GHz(2.9–14.75 GHz). The radiation patterns of the proposed antenna are obtained and found to be omni-directional in H-plane and bi-directional in E-plane. 相似文献
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Abbas Ali Lotfi Neyestanak Farrokh Hojjat Kashani Kasra Barkeshli 《Wireless Personal Communications》2007,43(4):1257-1265
In this paper a novel form of the familiar E-shaped patch antenna is presented. In the presented approach, by using the genetic
algorithm (GA) based on fuzzy decision-making, some modifications have been implemented to the incorporated slots which lead
to even more enhancement in the antenna bandwidth. The MOM (Method of Moment) is employed for analysis at the frequency band
of 1.8GHz–2.6GHz by the optimization parameters of supply locations and slot dimensions. In the implemented fuzzy system,
inputs are parameters like population, and outputs are parameters like recombination to produce the next generation. Fuzzy
inference system (FIS) is used for the control of GA parameters. The design is also optimized by successive iterations of
a computer-aided analysis package and experimental modifications. Prototype antenna, resonating at wireless communication
frequencies of 1.88 and 2.37 GHz, has been constructed and experimental results are in relatively good agreement with the
analysis. Dimensions of the modified slots for bandwidth enhancement, while maintaining good radiation characteristics, have
been determined and the obtained antenna bandwidth of 36.7% is larger than that of a corresponding unslotted rectangular microstrip
antenna or a conventional E-Shaped patch antenna. Details of the antenna design approach and experimental results are presented
and discussed. 相似文献
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