A compact UWB bandpass filter with improved out-of-band performance using modified coupling structure

作者：Tian, X.-K.^*; Chu, Q.-X.

来源：Progress in Electromagnetics Research Letters, 2011, 22: 191-197.

DOI：10.2528/PIERL11022504

• Coupling structures
• Filtering characteristic
• Harmonic suppression
• Parallel coupled line
• Stepped impedance
• Stub-loaded resonators
• Ultrawideband band-pass filter (UWB)
• UWB bandpass filter

A compact ultra-wideband (UWB) band pass filter (BPF) with improved harmonic suppression using a modified coupling structure is presented in this paper. The modified coupling structure is constructed by taper-connecting two folded open stubs to the traditional parallel-coupled lines, which shows an improved characteristic in harmonic suppression. By integrating the proposed coupling and the stepped-impedance stub loaded resonator (SISLR), a UWB BPF is finally built and tested. The simulated and measured results are in good agreement with each other, exhibiting good wideband filtering characteristic and improved out-of-band performance.

• 出版日期2011
• 单位华南理工大学