摘要
文章采用时域有限差分法(FDTD),对工作于2.4 GHz的环状蝶式双模滤波器进行了模拟分析和优化设计;通过不断改变微扰金属贴片的尺寸优化得到环状蝶式双模滤波器的中心频率为2.4 GHz,插入损耗和回波损耗能很好地满足无线局域网系统的应用要求,同时环状蝶式双模滤波器的几何尺寸比传统的由其他谐振器构成的微带滤波器的几何尺寸减小了40%以上;为了进一步的优化,采用四极微带双模谐振器来设计滤波器,滤波器由通带向到阻带的过渡十分陡峭,具有更加优异的选频特性。
A butterfly-loop dual-mode integrated-circuit package filter （DM-ICPF） has been analyzed and optimized by applying the FDTD method. This filter is designed in a way that they operate in dual-modes（DM） of TM^z 100 and TM^z010 to ensure good electric performance at the center frequency. By uninterrupted changing and optimizing the dimension of small infinitesimal disturbance metal strip, it is found out that the center frequency of the butterfly-loop DM-ICPF is 2.4 GHz. The return losses and insertion losses can fulfill the requirement of wireless local area networks. The approximate minification of the butterfly-loop DM-ICPF geometric size is above 40% in comparison with the geometric size of conventional microstrip filters which are constituted by other resonators. For enhancement of the electric performance around the resonant frequency at 2.4 GHz, a microstrip band-pass filter using four-pole dual-mode meander loop resonators is also presented, and its FDTD simulation result shows that the filter has a better frequency response.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第7期908-911,共4页
Journal of Hefei University of Technology：Natural Science
基金
教育部科学技术研究重点资助项目(03100)
安徽省自然科学基金资助项目(050420202)
关键词
时域有限差分算法
无线局域网
环状蝶式双模滤波器
finite-difference time-domain （FDTD）
wireless local area network
butterfly-loop DMICPF
