The design of a compact, wide spurious-free bandwidth bandpass filter using stepped impedance resonators
作者： K. U-yen , E.J. Wollack , T. Doiron , J. Papapolymerou , J. Laskar
DOI: 10.1109/EUMC.2005.1610078
关键词:
摘要: We propose an analytical design for a microstrip broadband spurious-suppression filter. The proposed uses each section of the transmission line as both coupling and spurious suppression element. Every two sections are combined to create quarter-wavelength stepped impedance resonator (/spl lambda//4 SIR). optimal length is proven be shortest, while delivering broadest spurious-free bandwidth. experimental result shows that size 4th order bandpass filter with ratio (R) 0.2 0.33/spl lambda/, long 0.18/spl lambda/ wide, which less than half designed using in-line approach. out-of-band attenuation developed greater 50 dB; first mode shifted approximately 5.4 times fundamental frequency.
jaxa.jp参考文章(10)
S. Yamashita, Mitsuo Makimoto, Microwave Resonators and Filters for Wireless Communication: Theory, Design and Application ,(2000)
George Lawrence Matthaei, Leo Young, Edward McClung Thompson Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures ,(1980)
Hoi-Kai Pang, Ka-Meng Ho, Kam-Weng Tam, R.P. Martins, A compact microstrip /spl lambda//4-SIR interdigital bandpass filter with extended stopband international microwave symposium. ,vol. 3, pp. 1621- 1624 ,(2004) , 10.1109/MWSYM.2004.1338893
A. Sanada, H. Takehara, T. Yamamoto, I. Awai, /spl lambda//4 stepped-impedance resonator bandpass filters fabricated on coplanar waveguide international microwave symposium. ,vol. 1, pp. 385- 388 ,(2002) , 10.1109/MWSYM.2002.1011636
G.B. Stracca, A. Panzeri, Unloaded Q-Factor of Stepped-Impedance Resonators IEEE Transactions on Microwave Theory and Techniques. ,vol. 34, pp. 1214- 1219 ,(1986) , 10.1109/TMTT.1986.1133519
Reinmut K. Hoffmann, Harlan H. Howe, Handbook of microwave integrated circuits Norwood. ,(1987)
M. Makimoto, S. Yamashita, Bandpass Filters Using Parallel Coupled Strip-Line Stepped Impedance Resonators international microwave symposium. ,vol. 28, pp. 1413- 1417 ,(1980) , 10.1109/TMTT.1980.1130258
Jen-Tsai Kuo, E. Shih, Microstrip stepped impedance resonator bandpass filter with an extended optimal rejection bandwidth IEEE Transactions on Microwave Theory and Techniques. ,vol. 51, pp. 1554- 1559 ,(2003) , 10.1109/TMTT.2003.810138
C. Quendo, E. Rius, C. Person, M. Ney, Integration of optimized low-pass filters in a bandpass filter for out-of-band improvement international microwave symposium. ,vol. 49, pp. 2376- 2383 ,(2001) , 10.1109/22.971624
M. Sagawa, M. Makimoto, S. Yamashita, A Design Method of Bandpass Filters Using Dielectric-Filled Coaxial Resonators (Short Papers) IEEE Transactions on Microwave Theory and Techniques. ,vol. 33, pp. 152- 157 ,(1985) , 10.1109/TMTT.1985.1132971