基于半模基片集成波导互补开环谐振器的新型滤波器研究

一种新型的基于半模基片集成波导（HMSIW）表面上开互补谐振环高性能平面滤波器。该结构允许低于截止频 率以下传输正向波,利用具有高通特性的HMSIW 和CSRR 组成具有带通特性的滤波器,该滤波器具有体积小巧,损耗 低,易制作,并方便与其他电路集成等优势     

基于新型互补开环谐振器的基片集成波导滤波器

设计了一种新型的互补开环谐振器(Complementary split ring resonators,CSRR),研究了新型CSRR应用在基片集成波导(Substrate integrated waveguide,SIW)时的频率响应。采用该结构设计并制作了两个SIW滤波器,其中心频率分别为5 GHz和6 GHz,带宽分别为800 MHz和2 GHz,设计和实测结果较为吻合。     

28GHz新型介质谐振器带通滤波器

本文介绍一种轴对称结构新型介质谐振器带通滤波器,其中心频率为28.72GHz,带内插入损耗0.74dB,带外衰减33dB,该滤波器体积仅为常用的平行结构滤波器的1/4。     

基于互补螺旋谐振器的SIW带通滤波器设计

在基片集成波导(SIW)结构中加载了互补螺旋谐振器(CSR),实现了具有超宽带外抑制的带通滤波器。CSR是复合左右手结构的一种,其等效电路与互补开口谐振环(CSRR)的相似,但CSR结构更加紧凑,设计更加灵活。SIW具有与传统金属波导相似的结构特点和分析方法,但它体积更小,且更容易与其它平面电路结合。将两个CSR单元加载到SIW中,会产生一个低于SIW截止频率的通带。调整两个CSR单元的位置,会在通带的两侧分别产生一个传输零点。本文设计的带通滤波器较传统的SIW滤波器体积更小,并且具有更宽的带外抑制。根据测试结果,滤波器的中心频率为7.68GHz,3dB带宽为394 MHz,带内插损最小值为1.91dB,带外抑制在9~18GHz范围内优于30dB。     

基于半模基片集成波导的新型带通滤波器研究

在半模基片集成波导上嵌入互补开环谐振器结构,设计了一种结构紧凑的新型带通滤波器.该结构允许低于截止频率以下传输正向波,利用具有高通特性的半模基片集成波导和互补开环谐振器组成具有带通特性的滤波器,通过改变互补开环谐振器结构参数,非常容易调节带通滤波器通带频率,利用该特性可以更容易实现任意通带微波滤波器.该滤波器具有体积小巧、损耗低、易制作、方便与其他电路集成等优势.     

一种基于多模谐振器的超宽带带通滤波器设计

基于多模谐振器(MMR)理论,采用微带线-槽线混合结构,通过增加输入、输出之间耦合提高频率选择性,设计了一种结构紧凑体积小,频率选择性高的超宽带带通滤波器。利用电磁仿真软件HFSS对设计结果进行了仿真。仿真结果表明:该滤波器通带覆盖了3.5~10.4 GHz之间的频段,并具有较好的带内带外性能。对该滤波器进行了实物加工和测试,实测结果与理论分析和仿真结果吻合良好,该滤波器拥有较好的性能,可应用于超宽带无线通信系统。     

基于新型谐振器的超宽带带通滤波器

采用两个新型四阶阶梯阻抗谐振器设计出一种新型超宽带带通滤波器,四个1/4波长的耦合线被平行放置于输入输出端,起到增加耦合强度的作用,三个谐振频率被调整在超宽带带宽(3.1 GHz～10.6 GHz)内。通过优化后,该滤波器在通带内具有五个传输极点,频带宽度在3.6 GHz～10.5 GHz,通带内回波损耗优于15 dB,最小插入损耗为0.6 dB,满足超宽带的传输要求。仿真结果显示,文中设计的滤波器具有小型化、低插入损耗和较好的带外特性等优点。     

基于CSRR的带通滤波器小型化设计

介绍了一种新型的互补开环谐振器(Complementary Split Ring Resonators,CSRR),用此新型谐振器和1/4波长传输线变换器制作了波导带通滤波器.在此基础上为了使滤波器更小型化,设计了挡板结构,改进了滤波器的1/4波长传输线变换器.通过对两种结构的仿真比较得出,新型结构的滤波器在满足设计需...     

厘米波段介质带通滤波器的设计与制作

为了提高基站的通信质量,研制了高性能的窄带介质带通滤波器。选择切比雪夫低通原型设计线路,采用6个环形介质谐振器直接耦合实现滤波器,输入输出采用探针耦合。用HFSS软件对滤波器的结构进行了仿真。用εr=38的高Q值介质陶瓷材料制作了环形谐振器,分析了衬垫材料的高度对环形谐振器性能的影响,测试了级间耦合系数。最后制作出中心频率为6GHz的介质带通滤波器,滤波器的带宽窄（0.5%）,插入损耗较小,阻带衰减很高,达到了国内先进水平。     

An Extended Doublet Substrate Integrated Waveguide (SIW) Bandpass Filter With a Complementary Split Ring Resonator (CSRR)

An “extended doublet” bandpass filter (BPF) is proposed using a substrate integrated waveguide (SIW) cavity with a complementary split ring resonator (CSRR) etched on its top metal plane. Thus, a single-layer BPF with two transmission zeros is realized successfully, with no additional area or layers occupied. The measured and simulated S-parameters of the filter are presented to show its predicted performance, with good agreements obtained between them.      

基于互补裂环谐振器的集成波导双工器设计

提出了一种基于圆形互补裂环谐振器的新型基片集成波导双工器。该款双工器工作在C波段,两个通道滤波器的工作频率均低于基片集成波导谐振腔的截止频率,由此达到小型化的目的,通道滤波器的体积较传统基片集成波导滤波器缩小约30%。圆形互补裂环谐振器较方形互补裂环谐振器的小型化效果好,并且更易设计。文中提出了一种新的增加通道隔离度方法,即在两个互补裂环谐振器之间切开一个缝隙。该款双工器已被加工成实物,实测两通道插入损耗为1.75 dB(@3.92 GHz)和1.62 dB(@4.62 GHz),隔离度＞37 dB,实测数据和仿真结果吻合。     

基于互补开口环谐振器的超宽带低通滤波器

为有效抑制寄生通带和高次谐波的影响,采用互补开口环谐振器结构设计了三种紧凑的新型超宽带低通滤波器。研究了互补开口环谐振器级联的阻带特性,并用来改善滤波器的通带、阻带性能。通过对比第一种滤波器的仿真结果,表明加载互补开口环谐振器的低通滤波器具有更好的裙边衰减和更优的阻带特性。在此基础上,还设计了另外两种新型的超宽带低通滤波器,并对三种滤波器进行了加工和测量,实测结果与仿真结果均较吻合。相关结果表明,三种滤波器具有紧凑的结构、超宽的通带,并在较宽阻带内具有良好的衰减性能。     

逆开环谐振器在微带天线谐波抑制中的应用

介绍了一种利用逆开环谐振器实现微带天线谐波抑制的方法.在传统逆开环谐振器的开口处添加一对缝隙,可有效的降低传输零点的位置.提出了加载逆开环谐振器微带线的等效电路模型,电路模型结果与仿真结果相吻合,证明了所提电路模型的正确性,并从等效电路模型的角度分析了传输零点下降的原因.将不同传输零点的结构单元级联起来制作在微带线的接地板上,很好地实现了微带天线的谐波抑制.仿真结果与测试结果相吻合,证明了所采用方法的有效性和正确性.该设计方法结构紧凑,简单易行.     

Varactor-Loaded Complementary Split Ring Resonators (VLCSRR) and Their Application to Tunable Metamaterial Transmission Lines

In this letter, the varactor-loaded complementary split ring resonator (VLCSRR) is presented for the first time. This particle is the dual counterpart of the varactor-loaded split ring resonator (VLSRR), which was introduced previously by some of the authors. Thanks to the presence of the varactor diodes, the electrical characteristics of the particle can be electronically tuned. Thus, by loading a microstrip line with VLCSRRs, the structure exhibits a tunable rejection band which is attributed to the negative effective permittivity provided by the particle. It is also shown in this letter that by adding a gap to the structure, the rejection band is switched to a tunable pass band with left handed wave propagation. Due to the topology of the complementary split rings resonators, the insertion and polarization of the diode varactors is not straightforward. These aspects are discussed in the letter. A circuit model for the VLCSRR is proposed. From parameter extraction and comparison between simulation of the circuit model and experiment good agreement is obtained.     

Elliptic-Function CPW Low-Pass Filters Implemented by Means of Open Complementary Split Ring Resonators (OCSRRs)

In this letter, an elliptic low-pass filter (LPF) implemented in coplanar waveguide (CPW) technology by etching open complementary split ring resonators (OCSRRs) in the central strip is presented for the first time. The OCSRRs behave as series connected parallel resonant tanks, whereas metallic patches etched in the back side of the substrate provide the required shunt capacitance to achieve the elliptic function response. An order-5 elliptic LPF has been designed and fabricated to illustrate the possibilities of this new approach. The measured frequency response is in good agreement with the ideal elliptic function up to twice the cutoff frequency $(f_{c}=1 {rm GHz})$. Since OCSRRs are electrically small resonators, filter dimensions are also small (device length is 2.5 cm, namely $0.13lambda$ , where $lambda$ is the guided wavelength at $f_{c}$). This work is illustrative of the possibilities of OCSRRs for the design of compact planar filters and other microwave components.      

Open Complementary Split Ring Resonators (OCSRRs) and Their Application to Wideband CPW Band Pass Filters

In this letter, open complementary split ring resonators (OCSRRs) are introduced for the first time. Such resonators are the dual counterparts of the open split ring resonators (OSRRs), introduced in 2004 by some of the authors, and consist on a pair of concentric hooks etched on a metal layer in opposite orientation. It is shown in the letter that OCSRRs can be modeled by means of an LC parallel resonant tank and that this particle roughly exhibits half the resonance frequency of the complementary split ring resonator (CSRR), hence being electrically very small. The interest of these resonators is illustrated through their application to a wideband coplanar waveguide band pass filter.     

谐振频率可调的开口谐振单环结构

开口谐振单环(Split Single Ring Resonatots,简记SSRRs)和开口谐振环(SRRs)一样可以激励磁谐振,从而实现负的磁导率.提出在SSRRs结构中引入平行于其开口边的金属线的方法设计了新的磁谐振单元,研究了金属线的引入对谐振频率以及负磁导率特性的影响.数值模拟结果表明:随着金属线长度l的增加,SSRRs的谐振频率随之减小;随着金属线与开口边的间距d的增加,SSRRs的谐振频率随之增加.金属线的加入不会对SSRRs的负磁导率特性产生重要影响,改变金属线的结构参数可以实现μ＜0频段的调控.所提出的新的磁谐振单元对于新型负磁导率材料和新型左手材料的设计具有重要的实际意义,也为新型无线通信材料的实现提供了可能.     

互补开口谐振环宽带带通滤波器的仿真设计

基于互补开口谐振环结构谐振特性,采用级联结构扩展带宽,设计了一种结构小的宽带带通滤波器,并通过HFSS软件仿真滤波器的谐振特性.仿真结果显示,滤波器具有较好的通带性能,其带外抑制度也比较高.