Single-Ridge Waveguide Compact and Wideband Hybrid Couplers for X/Ku-Band Applications

Simoncini, Guendalina; Rossi, René M.; Alimenti, F.; Gatti, Roberto Vincenti

doi:10.3390/electronics11101538

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Examples may include structures that require new and critical fabrication methods and devices for which the dimensional accuracy is critical to the performance. We can find many papers where the design method is validated with simulation alone [24][25][26][27][28][29][30][31][32][33][34]. In our opinion, the aperture matching structure proposed in this paper is not about such a problem.…”

Section: Introductionmentioning

confidence: 89%

Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture

Xu,

Heo,

Ahn

et al. 2024

Sensors

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The circular waveguide aperture or open-end radiator, one of the canonical antenna elements, can be filled with a dielectric material for miniaturization. With dielectric filling, the aperture reflection increases and impedance matching is necessary. This paper presents a simple but innovative simulation-based approach to the aperture matching of a dielectric-filled circular waveguide aperture. By properly loading the aperture with two- or three-section dielectric rings, the impedance matching is possible over a wide frequency range starting slightly above the TE11-mode cutoff and continuing upward. The material for the aperture matching is the same as that filling the waveguide. The proposed matching structure is analyzed and optimized using a simulation tool for the dielectric constant εr of the filling material ranging from 1.8 to 10. For εr ≥ 5, the unmatched reflection coefficient ranges from −6.0 dB to −0.9 dB while the matched reflection coefficient is from −20.4 dB to −10.0 dB. The impedance matching has been achieved over more than an octave bandwidth.

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Section: Introductionmentioning

confidence: 89%

Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture

Xu,

Heo,

Ahn

et al. 2024

Sensors

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“…In many papers, authors present a design with experimental validation. In others, a design method is validated with computer simulation [9,11,18,[28][29][30][31][32][33]. We believe that the accuracy of the simulation tool used in this Communication is sufficient to prove the proposed design approach.…”

Section: Introductionmentioning

confidence: 94%

Computational Design of a Broadband In-Line Coaxial-to-Rectangular Waveguide Transition

Zhang,

Xu,

Heo

et al. 2023

Applied Sciences

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This Communication presents a computational design approach for a broadband in-line coaxial-to-rectangular waveguide transition having a 2.83:1 bandwidth. Existing designs have a bandwidth ranging from 1.36:1 to 2:1. The proposed transition consists of a four-step ridge transformer and three sections of the rectangular waveguide. The proposed design approach extends the bandwidth of the transition by a theory-based design of the width and height of the three-section waveguides and by a computer-aided optimization of the stepped-ridge transformer. The dimensions of the three waveguide sections are determined such that the transition operates from very close to the TE10-mode cutoff to slightly less than the TE30-mode cutoff. A four-step ridge transformer was computer-optimized for a low reflection coefficient over a broad bandwidth. The proposed design approach was applied to the design of a coaxial-to-WR75 transition whose reflection coefficient is less than −22.6 dB at 8.14–23.00 GHz (2.83:1 bandwidth). The dimensions of the proposed transition were obtained using an electromagnetic simulation tool. The increased bandwidth of the transition can be very useful, especially in measurement applications.

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A High-Balanced Interdigital Hybrid Metallic Waveguide Coupler Based on SSPPs- Coupling for WR-4 Ultra-Full- Band Applications

Zhou,

Dong,

Zhou

et al. 2024

IEEE Trans. Microwave Theory Techn.

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Single-Ridge Waveguide Compact and Wideband Hybrid Couplers for X/Ku-Band Applications

Cited by 3 publications

References 21 publications

Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture

Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture

Computational Design of a Broadband In-Line Coaxial-to-Rectangular Waveguide Transition

A High-Balanced Interdigital Hybrid Metallic Waveguide Coupler Based on SSPPs- Coupling for WR-4 Ultra-Full- Band Applications

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