A Transition between NRD Guide and Microstrip Line at 60 GHz

Kuroki, Futoshi

doi:10.1093/ietele/e88-c.10.1968

Cited by 9 publications

(5 citation statements)

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“…This metal piece is strategically placed to prevent unwanted radiation waves generated by the microstrip line. To suppress electromagnetic waves leaking between the metal piece and the parallel metal plate, a λ/4 step groove choke circuit is loaded onto this metal piece [47].…”

Section: Modulatorsmentioning

confidence: 99%

NRD Guide as a Transmission Medium Launched from Japan at Millimeter-Wave Frequency Applications

KUROKI

2024

IEICE Trans. Electron.

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Nonradiative dielectric waveguide is a transmission medium for millimeter-wave integrated circuits, invented in Japan. This transmission line is characterized by low transmission loss and non-radiating nature in bends and discontinuities. It has been actively researched from 1980 to 2000, primarily at Tohoku University. This paper explains the fundamental characteristics, including passive and active circuits, and provides an overview of millimeter-wave systems such as gigabit-class ultra-high-speed data transmission applications and various radar applications. Furthermore, the performance in the THz frequency band, where future applications are anticipated, is also discussed.

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Section: Modulatorsmentioning

confidence: 99%

NRD Guide as a Transmission Medium Launched from Japan at Millimeter-Wave Frequency Applications

KUROKI

2024

IEICE Trans. Electron.

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“…) H z = ψ z (x, y) sin(πz/a) (10) Substituting ( 9) and ( 10) into the functional of (8), discretizing xy-plane into hybrid edge/nodal triangular elements [33], [34], and integrating the functional in threedimensional space, we can get the following linear equation:…”

Section: Efficient Finite Element Analysis For Nrd Guide Devicesmentioning

confidence: 99%

Topology Optimal Design of NRD Guide Devices Using Function Expansion Method and Evolutionary Approaches

Hieda

Morimoto

Iguchi

et al. 2022

IEICE Trans. Electron.

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In order to increase communication capacity, the use of millimeter-wave and terahertz-wave bands are being actively explored. Non-radiative dielectric waveguide known as NRD guide is one of promising platform of millimeter-wave integrated circuits thanks to its nonradiative and low loss nature. In order to develop millimeter wave circuits with various functions, various circuit components have to be efficiently designed to meet requirements from application side. In this paper, for efficient design of NRD guide devices, we develop a topology optimal design technique based on function-expansion-method which can express arbitrary structure with arbitrary geometric topology. In the present approach, recently developed two-dimensional full-vectorial finite element method (2D-FVFEM) for NRD guide devices is employed to improve computational efficiency and several evolutionary approaches, which do not require appropriate initial structure depending on a given design problem, are used to optimize design variables, thus, NRD guide devices having desired functions are efficiently obtained without requiring designer's special knowledge.

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“…The use of a transition between the NRD guide and a rectangular waveguide has also been reported [11]. Hence, a rectangular waveguide feed is discussed.…”

Section: Rectangular Waveguide Feed Structurementioning

confidence: 99%

Feeding structures for 60‐GHz dielectric lens antenna with low sidelobes

Shimizu

Yoneyama

2006

Electron Comm Jpn Pt II

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SUMMARYThis paper studies a feed structure suitable for connecting a millimeter-wave low sidelobe dielectric antenna with an NRD guide. Specifically, an NRD guide, a rectangular waveguide, a circular waveguide, and a microstrip patch antenna are considered as a primary radiator. It is verified by simulation and experiments that a low sidelobe level and a high gain can be realized if an NRD guide, a rectangular waveguide, or a circular waveguide is used as a feed. For instance, when a dielectric lens antenna with a diameter of 32 mm is used, extremely good characteristics are obtained at 60 GHz including a maximum gain of 24.9 dBi, a sidelobe level of less than -27 dB, and a 3-dB beam width angle of 9°.

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A Transition between NRD Guide and Microstrip Line at 60 GHz

Cited by 9 publications

References 0 publications

NRD Guide as a Transmission Medium Launched from Japan at Millimeter-Wave Frequency Applications

NRD Guide as a Transmission Medium Launched from Japan at Millimeter-Wave Frequency Applications

Topology Optimal Design of NRD Guide Devices Using Function Expansion Method and Evolutionary Approaches

Feeding structures for 60‐GHz dielectric lens antenna with low sidelobes

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