Wideband Planar Filter Using Signal-interference Techniques
This paper presents a new wideband planar filter using signal-interference technique.The passband has a center frequency 1.5GHz.The proposed filter topology has a 50Ω input and output port respectively.The core design topology consists of a transversal signal-interference filtering section that embeds a miniature transversal filter.Thus,under signal-interaction principles,the filtering action comes about through the generation of multiple out-of-band power transmission zeros and constructive passband signal combinations.The proposed filter is prototyped using FR4 substrate with a dielectric constant of 4.4,thickness of 1.6 mm,loss tangent of 0.022 and conductor thickness of 35μm.The fabricated structure has a dimensional size of 90mm by 100 mm.The best matched measured return loss S11 is observed at 1.27GHz with a value less than-42dB.The corresponding passband insertion loss S21 is approximately -0.5dB with a -10dB bandwidth of 1.2GHz.The lower and upper stopband attenuation is greater than 40dB respectively.Both simulation and measurement result are presented and discussed.
W.W.Hong K.M.Lum
School of Science and Technology,SIM University,Singapore
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
76-79
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）