Periodically Nonuniform Coupled Microstrip Lines with Equalized Even- and Odd-Mode Velocities for Harmonic Suppression in Filter Design(<Special Section>2004 International Symposium on Antennas and Propagation)

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概要

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• Periodically nonuniform coupled microstrip line (PNCML) loaded with transverse slits is characterized using the fullwave method of moments and short-open calibration technique. Guided-wave characteristics of both even- and odd-modes are thoroughly investigated in terms of two extracted per-unit-length transmission parameters, i.e., phase constants and characteristic impedances. As such, frequency-dependent coupling between the lines of the finite-extended PNCML is exposed via two dissimilar impedances. Meanwhile, two phase constants try to be equalized at a certain frequency by properly adjusting the slit depth and periodicity, aiming at realizing the transmission zero. Further, equivalent J-inverter network parameters of this finite-length PNCML are derived to reveal the relationship between the transmission zero and harmonic resonance. By allocating this zero to the frequency twice the fundamental passband, one-stage and two-stage PNCML filters are then designed, fabricated and measured to showcase the advantageous capacity of the proposed technique in harmonic suppression.

• 社団法人電子情報通信学会の論文
• 2005-06-01

著者

• ZHU Lei

  School of Electrical & Electronic Engineering, Nanyang Technological University

• Sun Sheng

  Nanyang Technological Univ. Singapore

• Sun Sheng

  School Of Electrical & Electronic Engineering Nanyang Technological University

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