Compact Dual-Band and Wideband Filters With Resonant Apertures in Rectangular Waveguide

Sullca, Joaquin F. Valencia; Cogollos, S.; Boria, Vicente E.; Guglielmi, M.

doi:10.1109/tmtt.2022.3162307

Cited by 13 publications

(3 citation statements)

References 35 publications

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“…The design of the diplexer is based on resonant iris and singlet theory presented in [9]- [15]. In [14], a highpass filter scheme was demonstrated through the use of alternating resonant irises and TM110-mode cavities in an inline fashion, while quasi-triplet responses were demonstrated in [15] using triangular cavities with resonant irises.…”

Section: Diplexer Designmentioning

confidence: 99%

Highly Selective Broadband mm-Wave Diplexer Design

Bartlett

Glubokov

Kamrath

et al. 2023

IEEE Microw. Wireless Tech. Lett.

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This letter presents a novel broadband diplexer design that is capable of achieving highly stringent rejection characteristics though the use of singlets whose interconnecting irises are formulated as resonant slot-irises. The combination of these two resonant-cavity types allows for a unique filtering solution with increased filter order, wide available bandwidth, low geometric complexity and simple milling requirements which can be suitably applied to millimetre-wave and submillimetre-wave applications. A prototype is fabricated for operation in the Wband (75 GHz -110 GHz) in order to cover a 10% fractional bandwidth in each passband. Measurement of the prototype denotes highly accurate results and exemplifies the use of all resonator and coupling elements in order to support ten poles and four transmission zeros in an elegant diplexer solution.

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Section: Diplexer Designmentioning

confidence: 99%

Highly Selective Broadband mm-Wave Diplexer Design

Bartlett

Glubokov

Kamrath

et al. 2023

IEEE Microw. Wireless Tech. Lett.

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“…However, these solutions typically lack wideband responses. To address this limitation and create more compact filters, structures incorporating resonant irises have been proposed in [8], [9], [10], and [11]. Nonetheless, such structures face several limitations.…”

Section: Introductionmentioning

confidence: 99%

Direct-Coupled TE–TM Dual-Mode Waveguide Cavities

Tomassoni,

Bastioli,

Snyder

et al. 2024

IEEE Microw. Wireless Tech. Lett.

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This letter introduces a novel quadruplet structure in waveguide technology, comprising a dual-mode TM cavity within two λ/4 TE cavities. This structure demonstrates the capability of generating responses with four poles and two transmission zeros (TZs). Notably compact, it accommodates both wideband and narrowband responses effectively. The TZs are obtained by exploiting the nonresonating modes within the TM section. The coupling between the resonant mode of the TE section and both resonating and nonresonating modes is achieved by precise positioning of the TE section relative to the TM section. This inherent flexibility in TZ positioning renders the structure highly adaptable. Moreover, this structure can be exploited as building block for the design of higher order filters. Experimental results validate the viability and effectiveness of the proposed structure.

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“…White-space communications can also take benefit of this scenario by enabling the transmission of higher date rates by using non-adjacent frequency regions at the same time [6,7]. As of today, the interest of multi-band BPFs is fairly evidenced by the rich variety of solutions available in the technical literature for different RF technologies, such as planar [8][9][10], 3-D/waveguide [11][12][13][14], substrateintegrated waveguide [15][16][17], superconductor [18,19], and active/passive-integrated-circuit technologies [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Combined signal‐interference/split‐type microwave multi‐band bandpass filters

Malki

Yang

Gómez‐García

2023

IET Microwaves Antenna & Prop

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Two classes of RF/microwave planar quad-band bandpass filters (BPFs) that simultaneously exploit transversal signal-interference and multi-passband-splitting mechanisms are reported. The first approach makes use of a triple-band bandpass transversal filtering section (TFS) composed of two in-parallel stepped-impedance coupled-line signalpropagation paths.By inserting an open-ended stub at the input and output terminals of this TFS, its middle passband is divided into two sub-bands to attain an overall quadpassband filtering response. The second configuration employs a dual-passband TFS based on a coupled-line directional coupler with open-ended stubs at its direct and coupled ports. By loading such TFS with a replica of it at the direct and coupled ports of its coupler, the two passbands are split into four sub-bands to obtain the quad-band functionality. The RF operational foundations of these quad-band BPFs, along with single-and multi-stage design examples featuring sharp-rejection four-passband filtering responses with transmission zeros (TZs), are detailed. Moreover, for experimentaldemonstration purposes, two microstrip prototypes are developed and tested. Besides, as a further application, a two-layer balanced-circuit version with ultra-broad commonmode (CM) suppression of the constituent triple-passband TFS of the first prototype is built and measured.

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Compact Dual-Band and Wideband Filters With Resonant Apertures in Rectangular Waveguide

Cited by 13 publications

References 35 publications

Highly Selective Broadband mm-Wave Diplexer Design

Highly Selective Broadband mm-Wave Diplexer Design

Direct-Coupled TE–TM Dual-Mode Waveguide Cavities

Combined signal‐interference/split‐type microwave multi‐band bandpass filters

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