共查询到18条相似文献,搜索用时 171 毫秒
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为实现射频系统中微波器件的宽带化、小型化,设计了一款具有滤波性能的功分器。该滤波功分器创新性地将带通滤波器与一分三功分器级联在一个封装器件中,大大减小了体积且解决了阻抗不匹配问题。其中带通滤波器采用四级半集总结构,加入耦合电容版提高滤波性能,一分三功分器采用LC集总结构,实现了小型化。利用ADS软件进行二维仿真,利用HFSS软件进行三维模型的仿真。本文设计的一分三滤波功分器尺寸仅为3 mm×5.6 mm×1.5 mm,工作频带为1.8~2.2 GHz。仿真后的结果为:插入损耗小于7 dB,回波损耗优于19 dB,隔离度优于17 dB,所设计的滤波功分器满足性能要求,且具有小型化高性能的应用优势。 相似文献
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提出了一种集总元件宽带Wilkinson功分器的分析及设计方法。从功分器的奇偶模阻抗理论分析出发,将功分器设计转化为在偶模下求解阻抗比为2:1的宽带阻抗变换和在奇模下求解宽带阻抗匹配的问题,采用LC阻抗变换节取代传统电路的λ/4传输线,减小功分器体积,并推导出两级功分器的元件解算公式。经ADS仿真验证,由解算公式得到的两级功分器,在760~1240MHz的带宽内功率分配损耗小于0.1dB,隔离度大于20dB,输入输出端口反射系数均小于-20dB,可用带宽fH/fL为1.64,实现了Wilkinson功分器小尺寸、带宽大的优点。 相似文献
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提出并设计了一种低成本宽带90°巴伦电路结构,电路由宽带耦合威尔金森功分器、弱耦合线和扇形阶跃阻抗谐振器级联的宽带90°移相器组成。利用电磁仿真软件HFSS对工作在中心频率为1.65GHz 的微带电路进行建模和仿真。采用PCB工艺制作了电路实物并利用矢量网络分析仪进行测试;对比得出仿真与测试结果十分吻合,该巴伦实测相对带宽大于117.0% (0.65~2.58GHz),带内各端口回波损耗好于12.6 dB,输出端口隔离度大于13.1dB,带内插入损耗小于0.5 dB,相位误差小于90°±7.6°。与现有的结构和设计相比,该巴伦不仅具有更大的工作频带和单层电路布局,而且具有容易加工、成本低的优点。 相似文献
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分别设计了一分四和一分八的宽带紧凑型基片集成径向波导(SIRW )功分器,通过馈电探针的阶梯化方式,使常规一分四和一分八SIRW功分器在回波损耗小于-15 dB条件下的相对工作带宽由原先的6%和15%分别提高至58%和61%,仿真得到的带内插耗分别在-6.25 dB和-9.25 dB以内。为了验证仿真数据的准确性,对一分四功分器进行了测试,测试结果性能良好,满足工程使用要求。 相似文献
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毫米波由于方向性强,要实现在同一直线上的前后向通信,通常采用功分器+双天线的方式。为进一步实现集成化,本文提出了一款将波导功分器和双矩形波导喇叭天线进行集成设计的波导喇叭天线。首先,根据波导的两级阻抗变换设计T型宽带波导功分器;然后,根据最佳角锥天线公式完成对矩形喇叭天线设计仿真;最后,将波导功分器和双矩形形喇叭天线按工程应用进行集成设计建模仿真。仿真结果表明该双向天线最大增益为22.48dBi,在71-86GHz的频带内S11优于15dB。除此之外,本次设计的波导喇叭天线具有结构简单、尺寸小、加工容易等优点,通过合理地集成到宽带通信设备中,可满足货运铁路准线性区上下行的双向无线接入。 相似文献
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A new broadband in-phase power divider based on multilayer technology is presented. A simple design procedure is developed for the proposed multilayer power divider. An S-band four-way multilayer power divider was designed and measured. The simulated results are compared with the measured data, and good agreement is reported. The measured 15 dB return loss bandwidth is demonstrated to be about 72%, and its phase difference between the output signals is less than 3deg. 相似文献
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功率分配器(简称功分器)作为微波电路中常用的射频器件,是构建5G系统多输入多输出(MIMO)馈电网络的重要组成单元。为了对已有固定频率的功分器结构进行重新快速地优化设计,以适用于包括5G工作频段在内的任意实际所需的工作频段,该文以预先设计的一种双频功分器作为优化设计目标,提出了一种基于改进后的一维卷积神经网络的深度学习方案。预测功分器在其他任意双谐振频率处拥有良好性能的几何结构参数,运用自组织映射神经网络进行样本的选取,提高卷积神经网络的训练效率。预测出的功分器在电磁仿真软件中进行验证,仿真结果显示功分器在工作频率处的回波损耗高于20 dB,隔离度高于25 dB,插入损耗低于3.4 dB,工作带宽约为450~600 MHz,证明了利用神经网络实现多参数目标功分器的优化设计是一种快速有效的方法。 相似文献
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Kaijun Song Fulong Chen Minghua Zhao Guoliang Li 《Wireless Personal Communications》2014,78(2):1103-1114
A broadband eight-way differential substrate integrated waveguide (SIW) power divider with bandpass-filtering response by using novel hybrid multiple-via probe and multiple radial slots has been presented in this paper. The novel hybrid multiple-via probe are employed to achieve broadband impedance matching, while the multiple radial slots are used to improve the out-of-band rejection level. An eight-way differential SIW power divider with bandpass-filtering response is designed, fabricated, and measured. The measured results agree with the simulated ones closely in the desirable frequency range. The measured average insertion loss of the eight-way power divider is approximately 9.3 dB and input return loss is greater than 15 dB from 3.2 to 8.1 GHz. Moreover, the out-of-band rejection band with more than 25 dB attenuation from 9 GHz to more than 11 GHz is observed. A maximum amplitude imbalance of \(\pm 0.7\,\hbox { dB}\) is observed over the entire operating frequency range. 相似文献
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In this paper, a novel unequal broadband out‐of‐phase power divider (PD) is presented. Double‐sided parallel‐strip lines (DSPSLs) are employed to achieve an out‐of‐phase response. Also, an asymmetric dual‐band matching structure with two external isolation resistors is utilized to obtain arbitrary unequal power division, in which the resistors are directly grounded for heat sinking. A through ground via (TGV), connecting the top and bottom sides of the DSPSLs, is used to short the isolation components. Additionally, this property can efficiently improve the broadband matching and isolation bandwidths. To investigate the proposed divider in detail, a set of design equations are derived based on the circuit theory and transmission line theory. The theoretical analysis shows that broadband responses can be obtained as proper frequency ratios are adopted. To verify the proposed concept, a sample divider with a power division of 2:1 is demonstrated. The measured results exhibit a broad bandwidth from 1.19 GHz to 2.19 GHz (59.2%) with a return loss better than 10 dB and port isolation of 18 dB. 相似文献
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针对传统基片集成波导(substrate integrated waveguide,SIW)功分器设计中宽带化和小型化不易兼顾的问题,提出了一种基于慢波SIW(slow-wave SIW, SW-SIW)的功分器. 采用微带折线构成的慢波结构单元加载于SIW金属表面上,代替传统SIW连续的金属表面,与同尺寸的SIW相比,SW-SIW的截止频率下降了40%,能够实现横向尺寸的缩减,尤其当SW-SIW达到与SIW相同的相移量时,SW-SIW所需纵向尺寸更小. 所提出的基于SW-SIW的功分器在具有较宽带宽的同时实现了器件尺寸的减小. 通过测试结果可得,该功分器在8.25~12.8 GHz频带内的反射系数|S11|10 dB,相对带宽达到了43.2%,相位一致性良好且小型化效果明显,适用于紧凑型微波射频前端. 相似文献