A Novel Super Wideband Compact Filter Based on Dual-layer Left-handed Materials for Millimeter-wave Applications
A novel super wideband compact filter based on dual-layer left-handed materials is proposed and demonstrated by the full wave simulation using commercial software (Ansoft HFSS). The left-handed filter has a center frequency of 49 GHz and 144.9％ relative bandwidth with pass-band insertion loss less than 0.3 dB. The size of the filter is about 0.3mm2. In such a small size, it is a great improvement for the filter to have so wide a pass-band. In addition, this report demonstrates that a super wideband filter with a compact structure can be achieved by using the dual-layer LH materials. Figure 1(a) shows the layout of the proposed super wide band-pass filter constructed using three units of the novel compact dual-layer left-handed structure given in authors recently 2. The capacitor of the unit cell is of 0.0115mmm2, proving a capacitance of about 0.132 pF, shown in Fig. 1(b). There are six pairs of digits with 5 1m width and 5 1m spacing, in addition, the upper layer digits interweave with the nether ones. The spiral inductors occupies 0:02555×2mm2, offering an inductance of 0.275 nH (including the leads). The two wide patches in the middle are designed to enhance the RH nature since the RHMs are naturally low-pass filter. By inserting the RH patches the bandwidth of the novel band-pass filter can be increased even further. The metal was assumed lossless.Shown in Fig. 2 is the simulated result of the present left-handed filter using commercial software (Ansoft HFSS). The centre frequency of the filter is 49 GHz and its 3 dB bandwidth extends from 13.5 GHz to 84.5 GHz (144.9％ relative bandwidth). The feed and output CPW lines have the same characteristic impedance 50Ω.
Tao Lu Shanjia Xu
Department of Electronics Engineering and Information Science University of Science and Technology of China, Hefei 230027, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
140-141
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）