A Chebyshev Transformer-Based Microstri-to-Groove-Gap-Waveguide Inline Transition for MMIC Packaging

Pérez-Escudero, José M.; Torres-Garcia, Alicia E.; Gonzalo, R.; Ederra, I.

doi:10.1109/tcpmt.2019.2904430

Cited by 14 publications

(11 citation statements)

References 24 publications

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“…Therefore, the dimensions of the pins are subor-dinate to manufacturing. [23] has also discussed this phenomenon. In a word, the tolerances of subordinate parameters can be controlled as ±0.05 mm.…”

Section: Tolerance Analysismentioning

confidence: 97%

A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band

Tao,

Zheng,

Jin

2023

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents a novel type of compact inline coaxial to ridge gap waveguide (RGW) transition, which covers the whole Ka frequency band. The structure connects with the connector's inner conductor through a rectangular probe directly. The probe is set in nail bed without any extra parts. Hence, a simple and compact transition comes to fruition at the circuit topology level. This transition can be considered as an inhomogeneous stripline, so the characteristic impedance can be analyzed similarly to the stripline. Beyond this, a mounting hole is drilled at rectangular probe to improve the robustness and convenience of assembly without welding or conductive adhesive bonding. To verify the performance of the proposed structure, a back-to-back transition is designed, fabricated, and measured. Measurement results achieve better than 20 dB return loss and about 0.15 dB insertion loss from 26.4 GHz to 40.4 GHz. It corresponds greatly with simulation results and bespeaks valuable in millimeter-wave applications.

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Section: Tolerance Analysismentioning

confidence: 97%

A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band

Tao,

Zheng,

Jin

2023

International Journal of RF and Microwave Computer-Aided Engine

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“…The results show a smooth transition with S 11 ≤ −13 dB from 55 − 71 GHz and an insertion loss of roughly 0.45 dB. An alternative approach, based on the Chebyshev transformer, is presented in [132] to realize the transition between the microstrip line to the GGW for W-band applications. Furthermore, in the case of SIGW and IMGW, no special transition is required, since the dominant operating mode of these GW is a quasi-TEM mode and can be implemented employing the microstrip line.…”

Section: Gap Waveguide For Packaging and Integrationmentioning

confidence: 99%

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

Yong¹,

Bagheri²,

Ven³

et al. 2023

Preprint

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<p>Interest in the mmWave and sub-THz bands for next-generation communication and radar systems is increasingly growing due to the available electromagnetic spectrum. This has led to an urgent need to develop low-loss and low-fabrication-cost technologies that perform well at these frequencies. The Gap Waveguide (GW) technology is an emerging and viable contender for the development of radio frequency passive components and antenna systems. The GW technology is based on the parallel-plate waveguide principle. According to Maxwell's equations, ideally, no wave propagates within a structure if the top plate consists of a perfect electric conductor (PEC) while the bottom plate is a perfect magnetic conductor (PMC), and the distance between the plates is less than a quarter wavelength. This PMC structure creates high surface impedance characteristics which provide cutoff to all propagating modes within the airgap. In practice, these magnetic conductors can be created artificially using an Electromagnetic Band Gap (EBG) structure. Based on this simple principle, considerable research and development of novel components with high performance has seen the light in the past decade. The purpose of this paper is to present an overview of current advancements in the design and technical implementations of GW-based antenna systems and components. Practical applications and the industry interest in the developments of the GW technology for mmWave and sub-THz applications have also been scrutinized.</p>

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“…This type of transition has been long studied and some relevant examples can be found in the literature [22][23][24][25][26]. In this case the design method and configurations have some similarities with that presented in [27,28], since all of them are based on Chebyshev transformers. However, in this case the transition design benefits from the use of of gap waveguide sections.…”

Section: Introductionmentioning

confidence: 98%

“…First, the need for good electrical contact between upper and bottom parts in [27] is alleviated. Moreover, the intricate shapes required in [28] are avoided in this case. Therefore, manufacturing and assembly are simplified, leading to cost reduction with respect to previous designs.…”

Section: Introductionmentioning

confidence: 99%

A Gap Waveguide-Based Compact Rectangular Waveguide to a Packaged Microstrip Inline Transition

et al. 2020

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In this paper two different simple to design and easy to manufacturing transitions from a microstrip to rectangular waveguide based on ridge and groove gap waveguides are studied. The first one is based on a combination of a groove and ridge gap waveguide. In this case, the microstrip substrate occupies the whole bottom metallic housing block, namely, the transition and the gap between the bed of nails and the lid; therefore, it does not require any substrate shaping. Nevertheless, the transition needs to replace groove waveguide by ridge gap waveguide sections to avoid higher-order mode excitation. In the second approach, based on only a groove gap waveguide, the substrate is shaped to be only in the microstrip section, that is, outside the bed of nails area. This leads to a simplification of the design procedure. Prototypes of both transitions have been characterized, showing good agreement with the simulations taking into account the manufacturing tolerances. Performance comparable to the state-of-the-art in this frequency band has been achieved.

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A Chebyshev Transformer-Based Microstri-to-Groove-Gap-Waveguide Inline Transition for MMIC Packaging

Cited by 14 publications

References 24 publications

A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band

A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

A Gap Waveguide-Based Compact Rectangular Waveguide to a Packaged Microstrip Inline Transition

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