Ultra-wideband coplanar waveguide-to-asymmetric coplanar stripline transition from DC to 165 GHz

Dong, Yunfeng; Johansen, Tom K.; Zhurbenko, Vitaliy

doi:10.1017/s175907871800082x

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…The CPW-microstrip transition is specially designed for low reflections across the frequency range of interest of 1–20 GHz. It is worth mentioning that instead of the CPW to microstrip transition as pursued here, one could have used an Asymmetric Coplanar Stripline (ACS) to microstrip transition 27 , to achieve the same effect. However, due to the asymmetry of the ACS, the structure formed in this way may render the extraction of the unknown parameters more challenging.…”

Section: Switch Structurementioning

confidence: 99%

High frequency resistive switching behavior of amorphous TiO2 and NiO

Bulja¹,

Kopf

Tate

et al. 2022

Sci Rep

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Resistive switching (RS) of Transition Metal Oxides (TMOs) has become not only an attractive choice for the development of next generation non-volatile memory, but also as a suitable family of materials capable of supporting high-frequency and high-speed switching needed for the next generation wireless communication technologies, such as 6G. The exact mechanism of RS is not yet clearly understood; however, it is widely accepted to be related to the formation and rupture of sub-stoichiometric conductive filaments (Magnéli phases) of the respective oxides upon activation. Here, we examine the switching behaviour of amorphous TiO2 and NiO both under the DC regime and in the high frequency mode. We show that the DC resistance of amorphous TiO2 is invariant of the length of the active region. In contrast, the resistance of the NiO samples exhibits a strong dependence on the length, and its DC resistance reduces as the length is increased. We further show that the high frequency switching characteristics of TiO2, reflected in insertion losses in the ON state and isolation in the OFF state, are far superior to those of NiO. Fundamental inferences stem from these findings, which not only enrich our understanding of the mechanism of conduction in binary/multinary oxides but are essential for the enablement of widespread use of binary/multinary oxides in emerging non-volatile memory and 6G mm-wave applications. As an example of a possible application supported by TMOs, is a Reflective-Type Variable Attenuator (RTVA), shown here. It is designed to operate at a centre frequency of 15 GHz. The results indicate that it has a dynamic range of no less than 18 dB with a maximum insertion loss of 2.1 dB.

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Section: Switch Structurementioning

confidence: 99%

High frequency resistive switching behavior of amorphous TiO2 and NiO

Bulja¹,

Kopf

Tate

et al. 2022

Sci Rep

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“…With the ever increasing demand worldwide for high-speed data transmissions among mobile terminals, the components involved in the wireless communication links such as antennas, amplifiers, power dividers, transmission lines, and transitions have been under intensive study during the past decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In order to achieve larger bandwidths within a limited spectrum, these components are pushed to operate at higher frequencies which already reach the ranges of millimeter-wave and terahertz (THz) frequencies.…”

Section: Introductionmentioning

confidence: 99%

Wideband split-ring antenna arrays based on substrate integrated waveguide for Ka-band applications

Dong

Zhurbenko

Kaslis

et al. 2021

Int. J. Microw. Wireless Technol.

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This paper presents wideband split-ring antenna arrays based on substrate integrated waveguide (SIW) for Ka-band (26.5–40 GHz) applications. The antenna array is fed by a 2.92 mm coaxial connector (K-connector) and the power is equally distributed to each split-ring resonator. The designed coplanar waveguide (CPW), SIW, CPW-to-SIW transition, coaxial-to-CPW transition, and two-stage SIW power divider are described in detail. By using a thin Rogers 6002 substrate with silver epoxy-filled vias, a transition prototype is designed, fabricated, and tested in a back-to-back configuration. A wideband split-ring resonator is developed as a single element and four possible arrangements of antenna arrays are introduced. By combining the designed components and routing paths, two full layouts of the antenna arrays with four split-ring resonators are addressed. As a demonstrator, a 2×2 antenna array prototype in a compact format is designed, fabricated, and tested. The fabricated antenna array achieves a measured directivity of 15.0 dBi with a fractional bandwidth of 23.0% centered at 30.5 GHz.

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“…Various wideband transitions from a CPS line to other planar transmission lines were reported. In [6], the line impedance of the CPW-to-CPS transition, operating from DC to 165 GHz, was maintained at 50 Ω along the transition in the presence of a ground conductor plane. Also, in this transition, the CPS line was an asymmetric conductor-backed CPS, which was not a conventional CPS line.…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Coplanar Stripline-to-Microstrip Line Transition Using a Bended Structure on a Two-Layered Substrate

et al. 2021

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A design of a compact coplanar strip (CPS)-to-microstrip line (MSL) transition using a bended structure on a two-layered substrate is presented. The proposed transition consists of a CPS taper and a bended CPS-to-MSL transition on a two-layered substrate. The CPS taper is formed on the lower substrate with low permittivity (εr = 3.38), and the bended CPS-to-MSL transition is formed on the upper substrate with high permittivity (εr= 10.2). The proposed transition is designed with analytical formulas obtained by applying EM-based conformal mapping without parametric tuning trials. The conductor shape of the bended CPS-to-MSL transition is adjusted to form an optimal Klopfenstein impedance taper. The proposed CPS-to-MSL transition optimally connects between a high impedance CPS line (~160 Ω) and a 50 Ω MSL, which typically results in a long transition length for ultra-wideband performance. The implemented transition bended in a sinusoid shape on the two-layered substrate provides good performance from 2 GHz to 17 GHz with the maximum 2 dB insertion loss per transition, and the horizontal length of the bended transition is reduced to 42.9% of the straight transition length. This bended transition is developed for use in mm-wave balanced antenna/detector feeds but can be applied to a variety of wideband balanced circuit modules, where compact circuit size is critical.

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Ultra-wideband coplanar waveguide-to-asymmetric coplanar stripline transition from DC to 165 GHz

Cited by 4 publications

References 30 publications

High frequency resistive switching behavior of amorphous TiO2 and NiO

High frequency resistive switching behavior of amorphous TiO2 and NiO

Wideband split-ring antenna arrays based on substrate integrated waveguide for Ka-band applications

Compact Wideband Coplanar Stripline-to-Microstrip Line Transition Using a Bended Structure on a Two-Layered Substrate

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