Enhancing the spurious free range in inductive rectangular waveguide filters

Escudero, J.M. Perez; Martínez, David Martínez; Pons-Abenza, Alejandro; Acosta, José Antonio Lorente; Álvarez‐Melcón, A.; Guglielmi, M.

doi:10.1109/eumc.2015.7345854

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…Also, in [41] a structure with capacitive-loaded resonators that can avoid spurious responses was proposed. Furthermore, in [42], an inductive waveguide band-pass filter is presented, which combines inductive irises of different thicknesses, and resonators of different widths, to reduce the bandwidth of the first harmonic pass band, and further improve the out-of-band response.…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Valencia

Boria

Guglielmi

et al. 2020

IEEE Trans. Microwave Theory Techn.

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This paper describes the design procedure of a compact wideband waveguide filter, based on stepped impedance resonators (SIR) and a combined usage of capacitive and inductive coupling irises, that provides a significant improvement in the out-of-band response of the filter with respect to the state-ofthe-art. In addition to theory, several filter prototypes have been designed and manufactured. A detailed sensitivity analysis has been also carried out. Finally, simulations and measurements are compared, showing very good agreement, thereby fully validating the new filter topology. Index Terms-Aggressive space mapping, band-pass filters, hybrid (inductive and capacitive) irises, stepped impedance resonator and wideband.

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Section: Introductionmentioning

confidence: 99%

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Valencia

Boria

Guglielmi

et al. 2020

IEEE Trans. Microwave Theory Techn.

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“…In addition, a nonuniform inductive filter with different resonator widths has also been proposed in [10], with the objective of improving the spurious-free stopband. Furthermore, in [11], an inductive bandpass filter was designed and implemented using nonuniform coupling window thicknesses, and resonators of different widths in order to further increase the level of spurious rejection. Recently, a new technique for rectangular waveguide inductive bandpass filters has been proposed in [12], where the coupling windows have been arranged in a particular configuration, with the objective to attenuate the high-order modes and improve the out-of-band response.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Wideband Staircase Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Sullca

Guglielmi

Cogollos

et al. 2021

IEEE Trans. Microwave Theory Techn.

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The objective of this article is to describe the design of a new family of wideband filters in a rectangular waveguide based on hybrid couplings and a staircase configuration. The use of E-plane T -junctions and E-plane folded structures is also discussed, in order to enhance the out-of-band response and the selectivity of the filter with respect to the current state of the art. The design of several hybrid filter prototypes is discussed in detail, including manufacturing sensitivity and high-power analysis. Finally, simulations and measurements for an eight-pole filter prototype are also compared, showing very good agreement, thereby fully validating both the design procedure and the new filter topology that we propose.

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“…Non-uniform width and step impedance waveguide resonators were used to improve the out of band response [6,7]. Asymmetrical irises with different widths for enhancing spurious free range are proposed in [8]. Combline and mixed combline approach used to enhance the out of band performance is reported in [9,10].…”

Section: Introductionmentioning

confidence: 99%

Monolithic ceramic waveguide filter with wide spurious free bandwidth

Afridi

Sandhu

Somjit

et al. 2016

2016 46th European Microwave Conference (EuMC)

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Abstract-This paper presents two new design techniques forimproving the spurious performance of an integrated ceramic waveguide filter without compromising its figure-of-merit e.g. Q-factor. Nonuniform width ceramic waveguide resonators are used to spread the undesired higher order mode frequencies along with ceramic TEM resonators reducing the overall cutoff frequency of the resonators. The proposed designs offer 60-65% better spurious performance in comparison with uniform width integrated ceramic waveguide filter. Simulated results for a six pole Chebyshev integrated non-uniform width ceramic waveguide filter and an integrated evanescent mode non-uniform width ceramic waveguide filter are presented in this paper showing improved spurious performance.

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Enhancing the spurious free range in inductive rectangular waveguide filters

Cited by 9 publications

References 11 publications

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Compact Wideband Hybrid Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Hybrid Wideband Staircase Filters in Rectangular Waveguide With Enhanced Out-of-Band Response

Monolithic ceramic waveguide filter with wide spurious free bandwidth

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