Shunted-Line Stepped-Impedance Resonator

This article provides an extensive review of dual-band bandpass filter designs and discusses the pros and cons of these design methods. The behavior of an SLSIR proposed by the authors shows that two passbands can be generated without using external dual-band impedance transformers. Furthermore, by using the design curves shown in this article, the k and the Qe, which are used for the synthesis of a dual-band bandpass filter, can be accurately calculated. Two examples of dual-band bandpass filters operated at 1.9/5.7 and 2.45/5.7 GHz with different bandwidths was presented to show details of the design technique. The simulation and measurement results shown are in good agreement. The resulting SLSIR dual-band filters using this technique not only provide controllable responses but also have high frequency selectivity and good impedance matching with considerable size reduction. Finally, a performance comparison comparing the technique in this article with previous design methods is listed in Table 3. The design methodology should be useful in dual-band RF transceiver design.

[1]  Xiu Yin Zhang,et al.  Dual-Band Bandpass Filter Design Using a Novel Feed Scheme , 2009, IEEE Microwave and Wireless Components Letters.

[2]  C. Hsue,et al.  Dual-band bandpass filters using equal-length coupled-serial-shunted lines and Z-transform technique , 2004 .

[3]  Lei Zhu,et al.  Compact dual-band microstrip bandpass filter without external feeds , 2005, IEEE Microwave and Wireless Components Letters.

[4]  Sheng-Fuh Chang,et al.  Dual-band step-impedance bandpass filter for multimode wireless LANs , 2004 .

[5]  Chih-Ming Tsai,et al.  Performance of a planar filter using a 0/spl deg/ feed structure , 2002 .

[6]  Nj Piscataway,et al.  Wireless LAN medium access control (MAC) and physical layer (PHY) specifications , 1996 .

[7]  J. Kuo,et al.  Design of quasi-elliptic function filters with a dual-passband response , 2004, IEEE Microwave and Wireless Components Letters.

[8]  M. Makimoto,et al.  Bandpass Filters Using Parallel Coupled Strip-Line Stepped Impedance Resonators , 1980, 1980 IEEE MTT-S International Microwave symposium Digest.

[9]  Cheng-Ying Hsu,et al.  A simple and effective method for microstrip dual-band filters design , 2006 .

[10]  Xiu Yin Zhang,et al.  Dual-Band Bandpass Filters Using Stub-Loaded Resonators , 2007, IEEE Microwave and Wireless Components Letters.

[11]  Hong-Ming Lee,et al.  Planar filter design with fully controllable second passband , 2005, IMS 2005.

[12]  C. G. Montgomery,et al.  Principles of Microwave Circuits , 1965 .

[13]  Jen-Tsai Kuo,et al.  Dual-Band Bandpass Filter With Improved Performance in Extended Upper Rejection Band , 2009, IEEE Transactions on Microwave Theory and Techniques.

[14]  Cheng-Ying Hsu,et al.  Design of microstrip miniature dual-band filter using embedded resonators , 2006, 2006 Asia-Pacific Microwave Conference.

[15]  Hong-Ming Lee,et al.  Dual-Band Filter Design With Flexible Passband Frequency and Bandwidth Selections , 2007, IEEE Transactions on Microwave Theory and Techniques.

[16]  Chih-Ming Tsai,et al.  Planar filter design with fully controllable second passband , 2005, IEEE Transactions on Microwave Theory and Techniques.

[17]  Cheng-Ying Hsu,et al.  Design of Miniature Planar Dual-Band Filter Using Dual-Feeding Structures and Embedded Resonators , 2006, IEEE Microwave and Wireless Components Letters.

[18]  Jiasheng Hong,et al.  Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters , 1996 .

[19]  R. Wu,et al.  Dual-Band Vertically Stacked Laminated Waveguide Filter Design in LTCC Technology , 2009, IEEE Transactions on Microwave Theory and Techniques.

[20]  Mitsuo Makimoto,et al.  Microwave Resonators and Filters for Wireless Communication: Theory, Design and Application , 2000 .

[21]  M.K. Mandal,et al.  Design of Dual-Band Bandpass Filters Using Stub-Loaded Open-Loop Resonators , 2008, IEEE Transactions on Microwave Theory and Techniques.

[22]  Fu-Chang Chen,et al.  Novel Multistub Loaded Resonator and Its Application to High-Order Dual-Band Filters , 2010, IEEE Transactions on Microwave Theory and Techniques.

[23]  Ruey-Beei Wu,et al.  A Dual Wideband Filter Design Using Frequency Mapping and Stepped-Impedance Resonators , 2008, IEEE Transactions on Microwave Theory and Techniques.

[24]  Hong-Ming Lee,et al.  Dual-band coupling and feed structure for microstrip filter design , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[25]  Xiu Yin Zhang,et al.  An Investigation of Open- and Short-Ended Resonators and Their Applications to Bandpass Filters , 2009, IEEE Transactions on Microwave Theory and Techniques.

[26]  Fu-Chang Chen,et al.  A Compact Dual-Band Bandpass Filter Using Meandering Stepped Impedance Resonators , 2008 .

[27]  Xiaohong Tang,et al.  Compact Dual Band Transversal Bandpass Filter With Multiple Transmission Zeros and Controllable Bandwidths , 2009, IEEE Microwave and Wireless Components Letters.