An Effective Approach to Suppressing the Spurious Mode in Rectangular Waveguide Filters

• Published in: IEEE microwave and wireless components letters Vol. 29; no. 11; pp. 703 - 705
• Main Authors: Wu, Q., Zhu, F., Yang, Y., Shi, X.
• Format: Journal Article
• Language: English
• Published: IEEE 01.11.2019
• Subjects: Couplings; High-order mode suppression; Microwave filters; Passband; Rectangular waveguides; Resonant frequency; stopband improvement of filters; Time-frequency analysis; waveguide filters

In this letter, a new method for rectangular waveguides bandpass filters with improved stopband performance is presented. By setting the position of the coupling window, the coupling of the high-order mode can be attenuated, which makes it difficult to form parasitic passbands. It can significantly...