E-Plane Band pass Filter With Resonators of Different Cutoff Frequencies
DOI:
https://doi.org/10.58963/qausrj.v1i5.12Keywords:
E-Plane Filter , Bandpass Filter , Ridged Waveguide , Stopband Performance , Microwave FiltersAbstract
This research presents an innovative design for E-plane bandpass filters aimed at enhancing their stopband performance. Conventional filters often suffer from insufficient attenuation and a narrow second stopband, which limits their effectiveness in advanced applications such as diplexers . To address this limitation, the paper proposes a novel structure that utilizes a metal insert within the waveguide to form a series of resonators with unequal ridges . This configuration creates coupled resonant sections, each possessing a different cutoff frequency and characteristic impedance . A five-resonator X-band filter was designed and simulated using the proposed architecture to validate its performance . The numerical results demonstrate the clear superiority of the new design, achieving high attenuation of over 50 dB across a broader frequency range in the stopband and shifting the spurious second passband to a significantly higher frequency compared to conventional filters . The study concludes that this approach not only improves the electrical performance substantially but also contributes to reducing the filter's physical dimensions while maintaining compatibility with simple manufacturing processes .
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Copyright (c) 2010 the Author(s).
This work is licensed under a Creative Commons Attribution 4.0 International License.
