CAJ | 학술논문

提出了一个新型的平面微带双频段带通滤波器,由加载双分支线的开环阶梯阻抗谐振器和平行耦合微带线组成.通过调节开环阶梯阻抗谐振器、平行耦合微带线和加载分支线的长度,带通滤波器在2.55与5.35 GHz具有很好的双通带特性且在其间有很好的隔离度.两者的相对带宽分别为11.8%与16.8%.与传统的开环阶梯阻抗谐振器相比,该带通滤波器在第2频带有更宽的带宽,可以覆盖WLAN在高频段的整个范围.该双频段带通滤波器具有低损耗、高隔离、低纹波的特性.通过比较HFSS软件的仿真结果与实际测得的结果发现,两者具有很好的一致性.
제출료일개신형적평면미대쌍빈단대통려파기,유가재쌍분지선적개배계제조항해진기화평행우합미대선조성.통과조절개배계제조항해진기、평행우합미대선화가재분지선적장도,대통려파기재2.55여5.35 GHz구유흔호적쌍통대특성차재기간유흔호적격리도.량자적상대대관분별위11.8%여16.8%.여전통적개배계제조항해진기상비,해대통려파기재제2빈대유경관적대관,가이복개WLAN재고빈단적정개범위.해쌍빈단대통려파기구유저손모、고격리、저문파적특성.통과비교HFSS연건적방진결과여실제측득적결과발현,량자구유흔호적일치성.
A novel dual-band planar microstrip filter using parallel coupled microstrip lines and open-loop steppedimpedance resonators (SIRs) loaded with two shunt open stubs is presented. By tuning the physical lengths of open-loop SIRs,parallel coupled microstrip lines and two stubs, the bandpass filter has good dual-passband performance at 2. 55 and 5.35 GHz and high isolation between the two passbands. The relative bandwidths of the two passbands are 11.8% and 16. 8%,respectively. Compared with the conventional open-loop SIR filters, the designed filter has a comparatively broader fractional bandwidth at the second passband. So it can cover all the wireless LAN(local area network) bands. In addition, the filter has the features of low loss, high rejection and low tipple. The measured results are in good agreement with the simulated responses by HFSS software.