共查询到19条相似文献,搜索用时 140 毫秒
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基于经典的半波长滤波器理论,设计了一种用于太赫兹通信系统的半波长磁耦合矩形波导带通滤波器。仿真结果表明,该滤波器中心频率为118 GHz,通带为114.3~123 GHz,相对带宽为7.4%;在131.8 GHz处的抑制度大于30 dB,通带插入损耗小于0.8 dB,通带回波损耗大于20 dB。经过实物测试,测试结果与仿真结果基本一致。这种滤波器的结构简单,制作难度低。 相似文献
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设计并实现了一种采用进口电火花技术加工的D波段电感膜片耦合的矩形波导空腔滤波器。采用等效电路法设计了一个140GHz矩形空腔带通滤波器。采用有限元仿真软件HFSS分析了腔体个数对滤波器主要性能的影响,最终成功设计了一个性能优良的四阶空腔滤波器,中心频率(140±3)GHz,带内插入损耗S21在-3dB以内,回波损耗S11在-20dB以下。采用电火花微加工技术成功加工出了四阶滤波器的主体部分,相应完成了结构键合等关键工艺,首次制作了基于电火花技术的D波段矩形波导空腔滤波器。测试结果为中心频率(138.5±3)GHz,带内插入损耗最好达到了-4.4dB。结果表明滤波器在140GHz具有带通特性和滤波功能,尽管与理论上的-3dB有差异,但考虑到加工误差、夹具损耗等情况下,样品主要技术指标与设计值较为一致。 相似文献
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本文的目标是设计制作一个中心频率为3.0GHz,通带200MHz。插入损耗小于3.5dB的微带带通滤波器。本文首先阐述了微带滤波器的工作原理、设计方法,接着介绍了该微带滤波器的设计过程。最后给出实物测试结果。 相似文献
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文中提出了一种具有宽阻带的紧凑型双频带通滤波器,它采用了折叠短路枝节负载谐振器、紧凑型微
带单元谐振器(CMRC)和阶跃阻抗谐振器结构。由于多个谐振器产生了五个可控传输零点(TZ),该滤波器实现了两个
通带之间的良好隔离度以及宽阻带特性。制作并测试了尺寸紧凑的双频带通滤波器实验样品,测试结果显示,第一通
带和第二通带的中心频率/ 插入损耗分别为0. 66 GHz/0. 8 dB 和1. 73 GHz/0. 7 dB,阻带频率高达10. 5 GHz,抑制水平
超过15 dB。 相似文献
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提出了一种具有慢波特性的扇形基片集成波导谐振腔,设计了一款小型化双频带通滤波器,相较于传统SIW带通滤波器,该滤波器小型化率为64%。通过引入金属盲孔结构实现了滤波器双频带中心频率的调节,同时,采用源负载耦合结构,在带外产生了4个传输零点,实现了滤波器的高选择特性。测试结果表明,滤波器的双通带中心频率分别为4.86 GHz和6.81 GHz,3 dB带宽分别为238 MHz和212 MHz,双频带插入损耗分别优于0.9 dB和1.1 dB,与仿真结果基本一致。 相似文献
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本文应用传输线理论对PBG结构带通滤波器进行分析,并在此基础上仿真、设计一种新颖的K波段的双模带通滤波器.光子带隙结构具有独特的带阻特性,对高次模具有很好的抑制特性,能够提高微波电路系统的抗干扰能力.由于PBG的慢波特性,使得带通滤波器的结构尺寸大为减小,符合系统小型化的要求.在此基础上,就这种结构应用Ensemble软件进行优化仿真.最后制作出滤波器并进行了测试.仿真结果与实验结果吻合很好,插入损耗为-4.5dB,通带中心频率为25.2GHz,-3dB带宽为1.8GHz,相对带宽7%. 相似文献
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This paper presents a terahertz (THz) band-pass filter using ultra-precision machining technology based on Chebyshev filter prototype. This iris inductive window coupled waveguide filter was designed by using 8 resonant cavities with a center frequency of 345 GHz and a 7% bandwidth. The final design fulfills the desired specifications and presents the minimum insertion loss of 1.55 dB and the return loss of less than 15 dB at 345 GHz. The stop-band rejection is 50 dB off the center frequency about 30 GHz, which means it has a good performance of high stop-band suppression. Compared with the recent development of THz filters, this filter possesses the characteristic of simple structure and is easy to machining. 相似文献
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A novel K band band-pass filter based on photonic band-gap (PBG) is presented. The proposed structures exhibit low insertion loss, compact size, simple fabrication and slow-wave characteristics. Due to slow-wave characteristic, PBG structure minimizes the pass-band filter to one-tenth of conventional filters with spurious-free response and deep attenuation levels. The miniature band-pass filter was simulated, realized and measured. There is a good agreement between the experiment and simulation results had been achieved. Its center pass-band frequency of this filter is 25.2?GHz, and insertion loss is less than ?4.5?dB. 相似文献
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提出一种新型四级叠层介质波导谐振器滤波器的结构及其设计方法。建立三维有限分析模型讨论了二级介质波导滤波器耦合特性,设计出二级片式介质波导谐振器滤波器。采用LTCC工艺叠加两块二级片式波导滤波器得到四级叠层波导滤波器,通过三维有限元分析模型绘制出四级叠层波导滤波器耦合特性曲线。最终设计出的四级叠层波导滤波器长8.8mm、宽6.2mm、厚1.6mm,中心频率5.2GHz,带宽300MHz,带内波动0.1 dB,插损0.8dB。其具有小型化、低插损以及适合表面帖装等特点,能满足下一代WLAN系统应用要求。 相似文献
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This paper presents the design and performance of 60-GHz-band coplanar monolithic microwave integrated circuit (MMIC) active filters. To compensate for the loss of the passive filter, a resonator composed of a quarter-wavelength line is terminated by a circuit with a constant negative resistance over a wide frequency band. Cross-coupling is introduced to make the attenuation poles on both sides of the passband. We develop two types of two-stage filter: one with medium bandwidth and the other with narrow bandwidth. The former shows an insertion loss of 3.0 dB with a 3-dB bandwidth of 2.6 GHz and a rejection of larger than 20 dB at a 3-GHz separation from a center frequency of 65.0 GHz. This filter also shows a noise figure of 10.5 dB. The latter filter shows an insertion loss of 2.8 dB with a 10-dB bandwidth of 2.1 GHz at a center frequency of 65.0 GHz. It also shows an output power of 5.0 dBm at a 1-dB compression point. The loss variation due to temperature variation is successfully compensated using a gate bias control circuit. The size of the MMIC filters is 2.5 mm/spl times/1.1 mm. 相似文献
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Mercier D. Orlianges J.-C. Delage T. Champeaux C. Catherinot A. Cros D. Blondy P. 《Microwave Theory and Techniques》2004,52(4):1175-1181
Distributed microelectromechanical varactors on a coplanar waveguide have been used to design a two- and four-pole bandpass tune-all filters. The two-pole initial bandwidth is 6.4% at 44.05 GHz with a mid-band insertion loss of 3.2 dB and with matching better than 15 dB. The four-pole initial bandwidth is 6.1% at 43.25 GHz with a mid-band insertion loss of 6.5 dB and with matching better than 10 dB. The use of microelectromechanical system bridges allows a continuous tuning for both center frequency and bandwidth. The varactors biasing network has been designed so that the center frequency and bandwidth can be tuned separately. The two-pole filter center frequency can be changed from 44.05 to 41.55 GHz (5.6% tuning range), while the bandwidth can be independently changed from 2.8 to 2.05 GHz. The four-pole filter center frequency can be changed from 43.25 to 40.95 GHz (5.3% tuning range) and the bandwidth can be changed from 2.65 to 1.9 GHz. 相似文献
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对滤波器的高精确度理论设计及小误差的工艺实现进行探讨与设计加工。总结了国内外的多种设计经验,讨论了多种类型的滤波器设计方案,选取适当的滤波器结构形式,设计加工了110 GHz的感性窗耦合波导滤波器,其中感性窗耦合结构采用传统机械加工技术实现,与法兰盘结构一并集成。基于高频结构仿真(HFSS)软件进行仿真,结果表明:设计并制作的110 GHz带通滤波器,其中心频率为110 GHz,相对带宽为5%,插入损耗小于1 dB,带内回波损耗大于 20 dB,距中心频率2倍带宽处,带外抑制大于40 dB。 相似文献
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基于基片集成波导(substrate integrated waveguide,SIW)结构设计了两款四阶的耦合带通滤波器,使用三维全波电磁场仿真软件HFSS对设计的两款滤波器进行了仿真设计和优化.由仿真结果分析得出,两款滤波器的工作频率均位于毫米波频段.第一款SIW滤波器实现了切比雪夫型响应,中心频率为20 GHz,带宽为2 GHz,通带内的插入损耗低于1.5 dB,回波损耗低于-20 dB,在阻带中对信号的衰减程度可以达到50 dB.第二款SIW滤波器实现了准椭圆函数型的响应,中心频率为29.1 GHz,带宽为300 MHz,通带内的插入损耗低于1 dB,回波损耗低于-20 dB,在通带到阻带的过渡中实现了两个陷波点.仿真结果表明,在毫米波滤波器设计中引入SIW结构,有利于优化滤波器尺寸,得到较好的滤波器性能指标,是毫米波滤波器发展的一个重要方向. 相似文献