CAJ | 학술논문

提出一种新型的基于平行带线的带通滤波器,在不增加电路尺寸的基础上增强了滤波器的阻带抑制.该滤波器以平行带线进行馈电,包含顶层和底层2个完全相同的电路,两层电路中电流反相,可以认为这2个电路是级联工作的.与传统的微带线构成的相似结构和同样带宽的滤波器相比,该滤波器具有更强的阻带抑制、更陡峭的衰减以及更小的尺寸,其中阻带抑制最大能提高近50%.仿真和测试结果对比表明,两者吻合较好,验证了设计方法的可靠性.
제출일충신형적기우평행대선적대통려파기,재불증가전로척촌적기출상증강료려파기적조대억제.해려파기이평행대선진행궤전,포함정층화저층2개완전상동적전로,량층전로중전류반상,가이인위저2개전로시급련공작적.여전통적미대선구성적상사결구화동양대관적려파기상비,해려파기구유경강적조대억제、경두초적쇠감이급경소적척촌,기중조대억제최대능제고근50%.방진화측시결과대비표명,량자문합교호,험증료설계방법적가고성.
A novel bandpass filter based on double side parallel-swip line （DSPSL） is presented in this paper, which has stronger rejection in the stopbands, without size increasing. The proposed filter consists of two identical circuits on the bottom layer and top layer. The two circuits can be treated as a cascaded connection due to the out-of-phase currents of the two layers fed by DSPSL. For the same configurations and passband bandwidth, the proposed bandpass filter allows sharper roll-off, higher rejection in the stopbands, and has more compact size, and the maximum stop band rejection can increase nearly 50%, compared with that of the bandpass filter using microstrip line. Simulated and measured results indicate the two match well. which verifiv that the proposed idea is reliable.