Ku-Band Waveguide Filter with Multiple Transmission Zeros by Resonant Source to Load and Bypass Cross-Coupling

Miek, Daniel; Morán-López, Ana; Ruiz‐Cruz, Jorge A.; Höft, Michael

doi:10.23919/eumc.2019.8910677

Cited by 6 publications

(13 citation statements)

References 9 publications

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“…However, as discussed in [13], additional coupling paths between the source port and cavity two (m S2 ), the source port and cavity four (m S4 ) as well as cavity two and four (m 24 ) arise. The reason is that the basic TE 10 mode is excited in the oversized cavities one and three, realizing bypass couplings for the generation of an additional TZ above the passband of the filter.…”

Section: Basic Filter Set-upmentioning

confidence: 99%

“…The basic filter set-up was first proposed in [13] and is repeated in Fig. 1 for the sake of clarity.…”

Section: Basic Filter Set-upmentioning

confidence: 99%

“…For the realization of the two real frequency axis TZs, a negative cross-coupling between resonator one and four is required [13]. Many approaches are known in the literature for the realization of negative coupling factors in waveguide filter techniques.…”

Section: Basic Filter Set-upmentioning

confidence: 99%

“…1(a) was manufactured as a proof of concept in brass as a conventional H-plane filter. Tuning screws can be Dimensions are identical as proposed in [13]. The dimensions of the waveguide are chosen according to the Ku-band standard: a = 15.7988 mm and b = 7.8994 mm.…”

Section: Basic Filter Set-upmentioning

confidence: 99%

“…This paper is organized as follows. Based on [13], the basic filter set-up is shortly repeated in section "Basic filter set-up". In section "Phase equalized filter with six TZs", it is shown that the proposed set-up is able to realize a complex pair of TZs for phase equalization as well, leading to in total six TZs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Techniques for the generation of multiple additional transmission zeros in H-plane waveguide filters

Miek

Boe

Kamrath

et al. 2020

Int. J. Microw. Wireless Technol.

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In this paper, different techniques for the generation of additional transmission zeros (TZs) in planar waveguide filters are investigated. In the classical theory, TZs are generated only by destructive interference of non-adjacent cavities, limiting the available number of TZs to the filter order itself. However, more approaches for the generation of TZs are known, including bypass-coupling in oversized cavities, frequency-dependent coupling apertures as well as dispersive/resonant TZs which can be realized by the direct source to load cross-coupling. The aim of this paper is to combine several of the strategies in one physical filter set-up to increase the maximal number of TZs beyond the filter order. Different Ku-band fourth-order filter set-ups are presented, showing in total between six and eight real as well as complex TZs. Three filters are manufactured as a proof of concept and compared with the simulation, showing very good agreement.

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Section: Basic Filter Set-upmentioning

confidence: 99%

“…The basic filter set-up was first proposed in [13] and is repeated in Fig. 1 for the sake of clarity.…”

Section: Basic Filter Set-upmentioning

confidence: 99%

Section: Basic Filter Set-upmentioning

confidence: 99%

Section: Basic Filter Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Techniques for the generation of multiple additional transmission zeros in H-plane waveguide filters

Miek

Boe

Kamrath

et al. 2020

Int. J. Microw. Wireless Technol.

Self Cite

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Design of trisection filter with reconfigurable center frequency and transmission zeros using evanescent‐mode cavity resonators

Lai

Yang

Ling

et al. 2021

Micro & Optical Tech Letters

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In this paper, a trisection filter with reconfigurable transmission zeros based on the evanescent‐mode cavity (EVA) resonators is proposed. The design incorporates three EVA resonators. The varactors are set between two EVA resonators. By controlling the varactor capacitance value, couplings can be switched between electrical coupling and magnetic coupling. Based on this technique, the resulting two zeros can be designed to the desired position. Furthermore, a novel method by analyzing the magnitude and phase of trisection filters is proposed. Using this method, the transmission zeros position can be determined quickly. Measurement shows that the filter covers a frequency range of 2.11–2.83 GHz. Two transmission zeros can be arbitrarily designed to the left or right sides of the passband. Good agreement is obtained between simulated and measured results.

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Investigation of the cutting plane and tolerance analysis of cross-coupled W-band waveguide filters with multiple transmission zeros by source to load cross-coupling

Miek

Bartlett

Kamrath

et al. 2021

Int. J. Microw. Wireless Technol.

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In this paper, the influence of the cutting plane as well as the orientation of the cavities in cross-coupled W-band waveguide filters are investigated. When waveguide filters are manufactured with the commonly known CNC (computer numerical control) milling technique, at least one cutting plane is required. The position of this cutting plane has an impact on the composition of the cavities, the manufacturing accuracy, and on the maximal number of transmission zeros (TZs) introduced by a direct source to load (SL) cross-coupling. Similar filter set-ups therefore may show different performances depending on the position of this cutting plane. To examine all these effects, three similar fourth-order W-band filter set-ups are realized with distinct cutting planes and different oriented cavities. The filters are compared in terms of the sensitivity to manufacturing tolerances, the maximal number of TZs introduced by a direct SL cross-coupling as well as their spurious mode performance.

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Ku-Band Waveguide Filter with Multiple Transmission Zeros by Resonant Source to Load and Bypass Cross-Coupling

Cited by 6 publications

References 9 publications

Techniques for the generation of multiple additional transmission zeros in H-plane waveguide filters

Techniques for the generation of multiple additional transmission zeros in H-plane waveguide filters

Design of trisection filter with reconfigurable center frequency and transmission zeros using evanescent‐mode cavity resonators

Investigation of the cutting plane and tolerance analysis of cross-coupled W-band waveguide filters with multiple transmission zeros by source to load cross-coupling

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