2.9 - 8.4 GHz Filter Bank Using Stub-Loaded Multi-Mode Resonators ()
ABSTRACT
This paper
consolidates the activity of design and fabrication of 2.9 - 4.32 GHz, 4.3 - 6.42
GHz, and 6.4 - 8.4 GHz filter bank. Novel compact microstrip bandpass filters with
stub-loaded multi-mode resonators are proposed. Simulated results indicate that
all the filters exhibit insertion losses less than 1.5 dB with passband ripples
of 1 dB and sharp attenuations of above 40 dB in their stopbands. The maximums of
input and output VSWRs are 1.742 and 1.734,
respectively. Due to fabrication error, the initial measured passbands show frequency
shifts and insertion losses in upper passbands deteriorate seriously. After tuning
of the filter bank, measured results imply that the input and output VSWRs are found lower than 2.135 and 2.187,
and the insertion loss in 1 dB bandwidth is less than 2.52 dB. Filter bank has a
sharp skirt and out-of-band rejection levels approaching to 40 dB in all desired
stopbands except at the frequencies near 2f0.
Share and Cite:
Yao, Y. and Fan, T. (2014) 2.9 - 8.4 GHz Filter Bank Using Stub-Loaded Multi-Mode Resonators.
Journal of Electromagnetic Analysis and Applications,
6, 397-403. doi:
10.4236/jemaa.2014.613041.