Monolithic ceramic waveguide filter with wide spurious free bandwidth

Afridi, Sharjeel; Sandhu, Muhammad Yameen; Somjit, Nutapong; Hunter, I.C.

doi:10.1109/eumc.2016.7824323

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Moreover, integrated ceramic waveguide filters, with nonuniform width resonators based on a monolithic ceramic structures, have been proposed in [43] and [44], respectively, in order to have a wide spurious-free bandwidth. Additionally, a recent contribution can be found in [45] discussing the design of a filter based on a waveguide loaded with dielectrics of different width, in order to obtain a wide spurious-free frequency range.…”

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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“…where W n and L n are the widths and lengths of resonators, and f c , f 1 , and f o are the cutoff, first spurious and fundamental frequencies, respectively. The design of the ceramic nonuniform width filter is proposed by the author in [16], and the broadband response is shown in Figure 1.…”

Section: Nonuniform Width Resonator Filtermentioning

confidence: 99%

Ceramic Waveguide Filters With Wide Spurious-Free Stopband Response

Afridi¹,

Hunter²,

Sandhu³

2019

PIER M

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This work proposes new filter design techniques to improve the out of band spurious performance of integrated ceramic waveguide filters and ceramic loaded filters. Various resonators of different types like non-uniform width, TEM and half ridge were used. The proposed filter designs offer a considerable miniaturization and significantly improved spurious performance up to 85% without compromising the figure of merits of the filters like Q-factor, return loss, etc. Two sixth order filters with best in-band and out-band performance have been fabricated. Measured results of the fabricated filters are in good agreement with the computer simulations, which confirm the validity and accuracy of designs.

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“…The center frequency of resonator is kept same by only changing the length of the resonators. The same idea of different width resonators in ceramic loaded waveguide filters is also implemented in [8]. The introduction of capacitive post at the center of resonator is used to improve the stop band rejection of air-filled waveguide filter and ceramic loaded waveguide filters [9] [10].…”

Section: Introductionmentioning

confidence: 99%

High Stop Band Rejection for Ceramic Loaded Waveguide Filters

et al. 2020

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This Paper describes the design procedure of a compact narrowband ceramic loaded filters with wide out of band response. The idea of loading the waveguide filter resonators with ceramic TEM blocks and ceramic ridge blocks are presented. Resonator loading with silver plated transverse electromagnetic (TEM) hole and silver plated ridge ceramic blocks offers wide spurious free bandwidth 2.45 times of center frequency. Simulated and measured results of six pole chebyshev Ceramic ridge loaded filter and simulated results of Ceramic TEM loaded filter are presented in this paper showing excellent outof-band performance. INDEX TERMS Chebyshev, Ceramic loaded, Spurious, Out-of-band, and TEM.

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Monolithic ceramic waveguide filter with wide spurious free bandwidth

Cited by 5 publications

References 12 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

Ceramic Waveguide Filters With Wide Spurious-Free Stopband Response

High Stop Band Rejection for Ceramic Loaded Waveguide Filters

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