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S. Lj. STEFANOVSKI1,* , M. M. POTREBIĆ2, D. V. TOŠIĆ2
A novel design of second-order E-plane bandstop waveguide filter is presented in this paper. It is based on the use of properly shaped quarter-wave resonators and a coupling element in a form of split-ring resonator. Actually, quarter-wave resonators are implemented as main resonating elements, while the split-ring resonator is primarily used to fine-tune the rejection-band. Simple design is proposed using single printed-circuit insert, placed in the E-plane of the standard WR-90 rectangular waveguide. The obtained filter is intended to operate in X-frequency band, its central frequency is set to 10 GHz, while the bandwidth is nearly 680 MHz. Filter response is investigated for various positions of the resonators, thus elaborating on the effects arising from the change of their positions. The variation of the bandwidth is also explained, regarding the mutual distance between the quarter-wave resonators and the presence of the coupling element. The experimental verification of the proposed design is provided, as well..
Bandstop filter, Coupling element, E-plane waveguide filter, Fine-tuning, Quarter-wave resonator, Split-ring resonator.
S. Lj. STEFANOVSKI, M. M. POTREBIĆ, D. V. TOŠIĆ, A novel design of E-plane bandstop waveguide filter using quarter-wave resonators, Optoelectronics and Advanced Materials - Rapid Communications, 9, 1-2, January-February 2015, pp.87-93 (2015).
Submitted at: Nov. 2, 2014
Accepted at: Jan. 21, 2015
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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