Broadband and compact multi-pole microstrip bandpass filters using ground plane aperture technique
作者： L. Zhu , K. Wu , H. Bu
关键词:
摘要: A ground plane aperture technique is developed for effective enhancement of the capacitive coupling factor in a parallel-coupled microstrip line (PCML). By applying so-called 'short-open calibration' (SOC) scheme fullwave method moments (MoM) algorithm, this PCML with two external lines characterised by an equivalent J-inverter network its susceptance and electrical lengths. Extracted parameters indicate that appears to be frequency-dependent maximum value rises rapidly as widened. With introduction single section between identical PCMLs, broadband compact multi-pole bandpass filter proposed first time, behaviour studied optimised on basis circuit network. The network-based results are confirmed EM simulation entire layout, featuring ultra-broadband four-pole behaviour. Further, capacitively loaded utilised formulate filter, effects also discussed design. predicted measured confirm attractive properties BW=60%. |S/sub 11/|<-16 dB 220% wide upper stop-band.
sci-hub.se 参考文章(10)
George Lawrence Matthaei, Leo Young, Edward McClung Thompson Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures ,(1980)
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
S.B. Cohn, Parallel-Coupled Transmission-Line-Resonator Filters IEEE Transactions on Microwave Theory and Techniques. ,vol. 6, pp. 223- 231 ,(1958) , 10.1109/TMTT.1958.1124542
Wolfgang Schwab, Full-wave design of parallel-coupled microstrip band-pass filters with aligned input and output lines european microwave conference. ,vol. 1, pp. 418- 421 ,(1996) , 10.1109/EUMA.1996.337603
K. Kamogawa, K. Nishikawa, I. Toyoda, T. Tokumitsu, M. Tanaka, A novel high-Q and wide-frequency-range inductor using Si 3-D MMIC technology IEEE Microwave and Guided Wave Letters. ,vol. 9, pp. 16- 18 ,(1999) , 10.1109/75.752110
Lei Zhu, Ke Wu, Unified equivalent-circuit model of planar discontinuities suitable for field theory-based CAD and optimization of M(H)MIC's IEEE Transactions on Microwave Theory and Techniques. ,vol. 47, pp. 1589- 1602 ,(1999) , 10.1109/22.788598
L. Zhu, K. Wu, Characterization of unbounded multiport microstrip passive circuits using an explicit network-based method of moments IEEE Transactions on Microwave Theory and Techniques. ,vol. 45, pp. 2114- 2124 ,(1997) , 10.1109/22.643745
Lei Zhu, Ke Wu, Corrections to "accurate circuit model of interdigital capacitor and its application to design of new quasi-lumped miniaturized filters with suppression of harmonic resonance" IEEE Transactions on Microwave Theory and Techniques. ,vol. 50, pp. 347- 356 ,(2000) , 10.1109/TMTT.2002.803452
C.P. Womack, The Use of Exponential Transmission Lines In Microwave Components IEEE Transactions on Microwave Theory and Techniques. ,vol. 10, pp. 124- 132 ,(1962) , 10.1109/TMTT.1962.1125468
H. Hirano, K. Nishikawa, I. Toyoda, S. Aoyama, S. Sugitani, K. Yamasaki, Three-dimensional passive circuit technology for ultra-compact MMICs international microwave symposium. ,vol. 43, pp. 2845- 2850 ,(1995) , 10.1109/22.475644