The comparison of the characteristics of the double-ridged horn antennas depending the geometry of ridge profiles for wideband application

Genç, Abdullah; Başyiğit, İbrahim Bahadır; Göksu, Tuna; Helhel, Selçuk

doi:10.1109/piers.2017.8261994

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…The appropriate design of the ridge profile is a key factor in conducting impedance transition from the feeding point to the free space. An investigation of the different types of ridge profiles employed in DRHA was discussed in [29], while the influence of varying ridge profiles in QRHA was explored in [28], which will also be covered in this paper. Variations in ridge profiles were investigated to determine the most suitable profile which can give optimum performance.…”

Section: B Variations In Ridge Profilesmentioning

confidence: 99%

Wideband Dual-Polarized 3D Printed Quad-Ridged Horn Antenna

2022

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Section: B Variations In Ridge Profilesmentioning

confidence: 99%

Wideband Dual-Polarized 3D Printed Quad-Ridged Horn Antenna

2022

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“…An important factor in the design of free space matching section is the profile of the tapered ridges. We investigate various ridge profiles which were previously implemented for the design of double-ridge horn antennas [46], [47]. It is observed that the ridge profile in [46] provides the best S 11 performance amongst all profiles.…”

Section: B Free Space Matchingmentioning

confidence: 99%

15–40 GHz and 40–110 GHz Double-Ridge Open-Ended Waveguide Antennas for Ultra-Wideband Medical Imaging Applications

Mirzaee

Mirbeik-Sabzevari

Tavassolian

2021

IEEE Open J. Antennas Propag.

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This paper presents the design, fabrication, and measurement of two ultra-wideband double-ridge open-ended waveguide antennas (OEWAs) for emerging high-resolution millimeter-wave (mm-wave) medical imaging applications. The proposed antennas can collectively provide a 95-GHz synthetic imaging bandwidth in the mm-wave regime. The antennas feature the smallest aperture sizes while providing the widest bandwidths amongst all OEWAs reported in the literature. The proposed antennas consist of coaxial to double-ridge waveguide (DRW) transitions and free-space matching sections. Two DRWs with 8:1 single-mode bandwidth in the mm-wave regime are designed. In the transition structures, coaxial flange launchers are connected to the DRWs through customized 50-Ω coaxial lines. To improve the impedance matching while meeting the fabrication requirements, an effective tuning technique is applied to adjust the input impedance of the transitions. Finally, to achieve a smooth transition and a well-matched impedance to the free space while maintaining small aperture sizes, piecewise tapered-ridge matching sections with the same aperture size as that of the designed DRWs are employed. The antennas are fabricated using the computer numerical control (CNC) milling process. Each antenna demonstrates |S 11 | < -10 dB and stable and symmetric radiation patterns across 15-40 GHz and 40-110 GHz with aperture sizes of 9.47×5.79 mm 2 and 3.78×2.27 mm 2 , respectively, reporting state-of-the-art results. Index Terms-Double-ridge waveguide (DRW), millimeter-wave (mm-wave) antennas, open-ended waveguide antennas (OEWAs), ultra-wideband antennas. This work Double-ridge rectangular 9.47 × 5.79 15 -40 90.9 This work Double-ridge rectangular 3.78 × 2.27 40 -110 93.3 θ c θ c θ c |S 11 | (dB) Frequency (GHz)

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“…There are two types of electromagnetic interference (EMI) propagation types. The first of these is emission by radiation, which the EMI source interferes with through the air [4][5][6][7][8][9][10], and the second is the emission by transmission, where the source interferes over the line to which it is connected [11,12]. The form of conducted emission noise is defined by modes in systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analyses of EMI Noise Separator for CISPR25

Yalçın

Göksu

Kesler

et al. 2023

International Journal of Engineering and Innovative Research

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In energy transmission systems, devices must be able to work safely with each other. Therefore, electromagnetic emission and susceptibility of the converting systems are expected to be in a certain range. electromagnetic propagation, especially by radiation and conduction, cannot be neglected in power electronics such as electric vehicle, microgrid, aerospace technologies. In order to examine and reduce the noise emitted by the devices, the noise should be separated into common mode and difference mode components. In this study, Shou Wang modeling, which is used to separate the noise components into related components, has been examined in order to analyze the noise components within the framework of the CISPR25 standard used for electric vehicles and redesigned. Circuit simulation and design were done and the results were compared. Thanks to these results, it has been seen that the circuit works efficiently up to 90MHz and gives 8dB S11 reflection parameter at the 108MHz threshold level. In addition, the separator circuit was used in a bidirectional DC-DC converter with a known EMI level of 1KW and the noise components obtained were compared with the components of the converter. As a result, it has been seen that the results obtained using the noise separator circuit are almost the same as the real results. In the 18 - 42 MHz range, only the results obtained with the noise separator are up to 8dBuV higher than the real results, other than that the results are exactly the same.

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The comparison of the characteristics of the double-ridged horn antennas depending the geometry of ridge profiles for wideband application

Cited by 10 publications

References 9 publications

Wideband Dual-Polarized 3D Printed Quad-Ridged Horn Antenna

Wideband Dual-Polarized 3D Printed Quad-Ridged Horn Antenna

15–40 GHz and 40–110 GHz Double-Ridge Open-Ended Waveguide Antennas for Ultra-Wideband Medical Imaging Applications

Experimental Analyses of EMI Noise Separator for CISPR25

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