Design of a novel microstrip lowpass filter for UWB chipless RFID readers

UWB chipless RFID receivers require compact and low cost integration solutions aiming at improving the signal integrity. A wide stopband, high selectivity and compact microstrip lowpass filter (LPF) is therefore needed. A combination of compact microstrip resonant cells (CMRCs) and uniquely shaped defect ground structures (DGS) are used in present LPF design to optimize the filter performances. The stopband with an attenuation level lower than 20 dB is obtained from 3.1 GHz up to 20 GHz. Both simulated and measured results are presented, showing a good agreement between simulation and measurement.

[1]  Quan Xue,et al.  Improved compact microstrip resonance cell lowpass filter with wide stopband characteristics , 2007 .

[2]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[3]  L. Li,et al.  Compact quasi-elliptic lowpass filter using symmetric rectangular coupled capacitors , 2008 .

[4]  Jun Xu,et al.  DGS resonator with two transmission zeros and its application to lowpass filter design , 2010 .

[5]  Jong-Sik Lim,et al.  Design of lowpass filters using defected ground structure and compensated microstrip line , 2002 .

[6]  Jr. R. Wyndrum.  Microwave filters, impedance-matching networks, and coupling structures , 1965 .

[7]  Nemai Karmakar,et al.  UWB chipless tag RFID reader design , 2010, 2010 IEEE International Conference on RFID-Technology and Applications.

[8]  Y. Qian,et al.  A design of the low-pass filter using the novel microstrip defected ground structure , 2001 .

[9]  R.P. Martins,et al.  Miniaturized microstrip lowpass filter with wide stopband using double equilateral U-shaped defected ground structure , 2006, IEEE Microwave and Wireless Components Letters.

[10]  R. Saal,et al.  On the Design of Filters by Synthesis , 1958 .

[11]  I. Balbin,et al.  Quasi-static modeling of defected ground structure , 2006, IEEE Transactions on Microwave Theory and Techniques.

[12]  R. Saal.  Der Entwurf von Filtern mit Hilfe des Kataloges normierter Tiefpässe , 1961 .

[13]  Xiaowei Sun,et al.  Compact lowpass filter using spiral compact microstrip resonant cells , 2005 .

[14]  N.C. Karmakar,et al.  Design of Chipless RFID Tag for Operation on Flexible Laminates , 2010, IEEE Antennas and Wireless Propagation Letters.

[15]  N.C. Karmakar,et al.  Multiresonator-Based Chipless RFID System for Low-Cost Item Tracking , 2009, IEEE Transactions on Microwave Theory and Techniques.

[16]  Chengguang Sun,et al.  Compact lowpass filter with wide stopband , 2012, 2012 2nd International Conference on Consumer Electronics, Communications and Networks (CECNet).