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A Lowpass Filter Design Using Curved and Fountain Shaped Resonators
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Abstract
In this paper a new lowpass filter (LPF) with curved line resonators and fountain shaped resonators is proposed. The proposed filter has achieved wide stopband, compact size, sharp roll-off rate and low return loss. Two tapered resonators are used to produce transmission zeros and widen the stopband. Also, a fountain shaped resonator is proposed using curved transmission lines to obtain good sharpness in the filter response. The cut-off frequency of the designed LPF is 1.74 GHz and the overall size of the designed LPF is 0.135 λg × 0.132 λg where λg is the guided wavelength at the cut-off frequency. The results show that the overall size of the lowpass filter could be reduced using curved line resonators and curved transmission lines.
Title: A Lowpass Filter Design Using Curved and Fountain Shaped Resonators
Description:
Abstract
In this paper a new lowpass filter (LPF) with curved line resonators and fountain shaped resonators is proposed.
The proposed filter has achieved wide stopband, compact size, sharp roll-off rate and low return loss.
Two tapered resonators are used to produce transmission zeros and widen the stopband.
Also, a fountain shaped resonator is proposed using curved transmission lines to obtain good sharpness in the filter response.
The cut-off frequency of the designed LPF is 1.
74 GHz and the overall size of the designed LPF is 0.
135 λg × 0.
132 λg where λg is the guided wavelength at the cut-off frequency.
The results show that the overall size of the lowpass filter could be reduced using curved line resonators and curved transmission lines.
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