Miniature Harmonic-Suppressed Microstrip Bandpass Filter Using a Triple-Mode Stub-Loaded Resonator and Spur Lines

作者：Torabi Amir^*; Forooraghi Keyvan

来源：IEEE Microwave and Wireless Components Letters, 2011, 21(5): 255-257.

DOI：10.1109/LMWC.2011.2122304

• Bandpass filter (BPF)
• spur line
• stub-loaded resonator (SLR)
• transmission zero (TZ)
• triple-mode resonator

A miniature harmonic-suppressed microstrip band-pass filter (BPF) with a new triple-mode stub-loaded resonator is presented in this letter. Four distinct mechanisms are utilized to create five transmission zeros (TZs), leading to sharp skirts and wide stopband. Both simulation and measurement results are presented. The simulated/measured minimum passband insertion loss is 0.66 dB/0.78 dB and the 20 dB rejection bandwidth is extended up to 4f(0). The size of the filter is about 0.23 lambda(g) x 0.17 lambda(g), where is the guided wavelength at the center frequency.

• 出版日期2011-5