Abstract
This paper presents a direct method to generate a transmission zero in evanescent-mode waveguide filter by adding a shorted waveguide shunted in the coupling region between two resonators. First, a traditional evanescent-mode waveguide filter with series coupling topology is designed. To introduce a transmission zero to enhance the stopband performance, a shorted waveguide is shunted in the coupling region between two adjacent resonators. Adjusting length of the shunted waveguide can easily adjust the position of the transmission zero. To maintain the bandpass performance of the whole filter, the coupling region needs to be tuned to produce suitable coupling strength as the same as the original one. A fourth-order example is designed and measured, measured results show good accordance with the simulated ones, validating the proposed method in this paper.
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References
Jaynes, E.T.: Ghost modes in imperfect waveguides. In: Proceedings of IRE, vol. 46, pp. 416–418, Feb 1958
Edson, W.A.: Microwave filters using ghost-mode resonance. In: Proceedings of IRE Electronic Components Conference, vol. 19, p. 2 (1961)
Bornemann, J., Arndt, F.: Rigorous design of evanescent-mode E-plane finned waveguide bandpass filter. In: Proceedings of IEEE MTT-S Digest, pp. 603–606 (1989)
Zhang, Q., Itoh, T.: Computer-aided design of evanescent-mode waveguide filter with non-touching E-plane fins. IEEE Trans. Microw. Theory Tech. MTT 36, 404–412 (1988)
Snyder, R.V., Bastioli, S.: Broad passband, wide stopband, high power evanescent mode filters using capacitively-loaded ridges. In: 42nd European Microwave Conference, 2012, pp. 176–179
Kun, L., Dexin, Q., Xingjian, Z., et al.: Analysis of stopband performance of evanescent mode waveguide bandpass filter loaded with tiny post. Appl. Electron. Tech. 43(8), 55–57, 65 (2017)
Caneron, R.J.: General coupling matrix synthesis methods for Chebyshev filtering functions. IEEE Trans. MTT 47(4), 433–442 (1999)
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He, L., Zhong, X., Fan, Z., Zhang, Q., Zhang, W. (2020). Evanescent-Mode Waveguide Filter with Transmission Zeroes Created by Shorted Waveguide Shunted in Coupling Region. In: Liang, Q., Liu, X., Na, Z., Wang, W., Mu, J., Zhang, B. (eds) Communications, Signal Processing, and Systems. CSPS 2018. Lecture Notes in Electrical Engineering, vol 517. Springer, Singapore. https://doi.org/10.1007/978-981-13-6508-9_48
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DOI: https://doi.org/10.1007/978-981-13-6508-9_48
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