应用于WLAN&WiMAX的小型化SIR可调双通带滤波器  

Miniaturization dual-passband filter with adjustable SIR applied in WLAN & WiMAX

作　　者：奂锐 罗杰[1] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,四川成都610031

出　　处：《现代电子技术》2015年第17期80-83,共4页Modern Electronics Technique

摘　　要：对传统双频段耦合方案进行改进,提出一种新型双通带滤波器结构。该滤波器由两个对称阶跃阻抗谐振器(SIRs)组成,通过调节SIR的电长度,可以得到中心频率可调的通带。为了验证设计与分析的正确性,提出和设计了3个双通带滤波器。Ⅰ型滤波器两个通带的中心频率分别为2.4 GHz和3.5 GHz,相对带宽分别为5.8%和13.7%;Ⅱ型滤波器两个通带的中心频率分别为3.5 GHz和5.2 GHz,相对带宽分别为5.7%和9.2%;Ⅲ型滤波器两个通带的中心频率分别为2.4 GHz和5.2 GHz,相对带宽分别为6.3%和5.4%。Ⅰ型和Ⅱ型滤波器均适用于宽带互通微波互联接入(Wi MAX)和无线局域网(WLAN)应用。Ⅲ型滤波器适用于双频WLAN应用。对所有滤波器进行加工与实测,测试结果与仿真结果吻合较好。A new structure of dual-passband fiher is proposed by improving the traditional dual-band coupling scheme. The filter is composed of two symmetrical stepped impedance resonators （SIRs）. The passband with adjustable center-frequency is ob- tained by adjusting the electrical length of SIR. To verify the validity of design and analysis, three dual-passband filters have been proposed and designed. The center frequencies of two passbands of filter I are 2.4 GHz and 3.5 GHz respectively, and the rela- tive bandwidth are 5.8% and 13.7% respectively. The center frequencies of two passbands of fiher II are 3.5 GHz and 5.2 GHz respectively, and the relative bandwidth are 5.7% and 9.2% respectively. The center frequencies of two passbands of filter III are 2.4 GHz and 5.2 GHz, and the relative bandwidth are 6.3% and 5.4% respectively. Filter I and filter lI are suitable for the applications of worldwide interoperability for microwave access （WiMAX） and wireless local area networks （WLAN）. Filter III is suitable for the application of dual-band WLAN. All filters were produced and tested. The testing performances show that the test results are identical with simulation results.

关 键 词：双频带 带通滤波器 阶跃阻抗谐振器 中心频率可调通带 WI MAX&WLAN 

分 类 号：TN713.34[电子电信—电路与系统]