Analysis of coplanar waveguide-to-coplanar stripline transitions

Mao, Shau‐Gang; Hwang, Chieh-Tsao; Wu, Ruey-Beei; Chen, Chun Hsiung

doi:10.1109/22.817468

Cited by 41 publications

(2 citation statements)

References 22 publications

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“…Planar baluns come in many forms and complexities. We chose the CPW to CPS transition presented by Chiou et al [23] and analysed by Mao et al [24], which combines a simple design, broadband operation and low insertion loss.…”

Section: Topologies Of Planar Transmission Linesmentioning

confidence: 99%

“…With regards to the design of the balun included in the topologies in figures 2(b) and (d), we follow the method used by Mao et al [24], where the CPW to CPS transition is divided into five sections. Each section tapers, crops and/or expands the transmission line to gradually make the transition keeping impedance variations small and fluid.…”

Section: Topologies Of Planar Transmission Linesmentioning

confidence: 99%

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Nanoscale broadband transmission lines for spin qubit control

et al. 2012

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The intense interest in spin-based quantum information processing has caused an increasing overlap between the two traditionally distinct disciplines of magnetic resonance and nanotechnology. In this work we discuss rigorous design guidelines to integrate microwave circuits with charge-sensitive nanostructures, and describe how to simulate such structures accurately and efficiently. We present a new design for an on-chip, broadband, nanoscale microwave line that optimizes the magnetic field used to drive a spin-based quantum bit (or qubit) while minimizing the disturbance to a nearby charge sensor. This new structure was successfully employed in a single-spin qubit experiment, and shows that the simulations accurately predict the magnetic field values even at frequencies as high as 30 GHz.

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Section: Topologies Of Planar Transmission Linesmentioning

confidence: 99%

Section: Topologies Of Planar Transmission Linesmentioning

confidence: 99%

Nanoscale broadband transmission lines for spin qubit control

et al. 2012

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Coplanar Stripline (CPS) Components

Suh¹

2005

Encyclopedia of RF and Microwave Engineering

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Coplanar stripline (CPS) is a balanced uniplanar transmission line, consisting of two metallic conductor strips separated by a certain gap width, on a substrate. Conventional CPS does not provide bottom metallization of the substrate for ground; instead, one of the conductor strips provides electric ground of the other signal strip. This article investigates (1) CPS transmission‐line characteristics for practical circuit design and analysis using closed‐form equations; (2) CPS circuit components such as resonators, filters, and “tee” junctions; and (3) applications to antennas and wireless power transmission. Various new CPS resonators are modeled and designed and their performance investigated in terms of Q factor or bandwidth. As applications of the proposed CPS resonators, new CPS bandpass filters are demonstrated. The design methods of bandpass filters and their lumped‐element equivalent circuits are presented. A simple CPS lowpass filter is developed using interdigital capacitors and a CPS transmission line. For CPS component measurements, two types of broadband CPS‐to‐microstrip transition are introduced. Printed dipole antenna feeding can also be easily implemented using this transition. A novel CPS tee junction using coupled CPS (CCPS) is introduced. As an application of CPS tee junction, a twin‐dipole antenna fed by microstrip‐to‐CPS tee junction is presented at Ka band. A 1×8 printed dipole phased array is developed with the twin‐dipole antenna. Finally, as a circuit application of CPS, a dual‐frequency rectenna is developed at 2.45 and 5.8 GHz. For dual‐frequency rectenna components, a dual‐frequency antenna, CPS lowpass filter, and CPS bandstop filters are developed. To achieve high RF ‐to‐DC conversion efficiencies at both frequencies, diode analyses are performed for frequency‐insensitive high conversion efficiency.

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Full‐wave FDTD design and analysis of wideband microstrip‐to‐waveguide transitions

Reig

Navarro

Such

2003

Micro & Optical Tech Letters

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scattering. When the observation point moves away from the incident angle, the incoherent scattering increases and then fluctuates due to the random phase situation. The fluctuations are characteristic of random scattering, since the bistatic scattering cross section per unit volume will fluctuate from sample to sample. When we increase the number of particles in the simulations, the multiple scattering simulations show increased scattering effects at the incident angle, which is caused by higher-order scattering.In Figure 7, the phase function of independent scattering, sticky particles, and nonsticky cylinders is compared. The sticky cylinders show an angular distribution pattern similar to that of the nonsticky cylinders, but a stronger amplitude than both independent scattering and nonsticky cylinders. The stronger scattering effect of the sticky cylinders is expected because the cylinders adhere to each other to form larger aggregates. ACKNOWLEDGMENTThis work is supported by NASA contract NAG5-9835 from the NASA Goddard Space Flight Center and by the City University of Hong Kong Research Grant 9380034. , where characterisation of both microstrip and ridge waveguides was described and used to model a microstrip-to-ridge waveguide discontinuity and ridge waveguide step junctions. On the other hand, the finite-difference time-domain (FDTD) method has been demonstrated to be a feasible and powerful tool for the analysis of microwave problems where arbitrary geometries are involved [4]. Nevertheless, a commonly known disadvantage is that it requires large amounts of computer resources, and this fact has limited its use as a design tool. So, it is not difficult to find FDTD-based analysis of waveguide transitions [5, 6], but the use of FDTD for design purposes is still not generalised [7]. The present work explores the design of microstrip-towaveguide transitions using a compact full-wave 2D approach of the FDTD method in combination with the stepped transmission line transformer theory. Specifically a full-wave 2D-FDTD scheme [8] is firstly applied for obtaining the design curves for the shielded microstrip. This technique is then extended to the calculation of the frequency and geometry-dependent parameters for the doubleridged waveguide that will be used in the transition. Finally, a full non-uniform 3D-FDTD analysis is performed over the whole design in order to validate the design process.The structure that we have selected to test the procedure is shown in Figure 1. It is built in a mixed technology consisting of a shielded microstrip zone with upper and lower ridged metallisations that are gradually matched to a standard waveguide. The more common parameters are described in the figure's upper inset, while a frontal sight of an example of a transition profile is also displayed in the same figure. Similar geometries have been successfully used in the design of radiating elements for radar applications [9]. Because of the lower dispersive behaviour of both shielded microstrip and ridged waveguide as compared...

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Analysis of coplanar waveguide-to-coplanar stripline transitions

Cited by 41 publications

References 22 publications

Nanoscale broadband transmission lines for spin qubit control

Nanoscale broadband transmission lines for spin qubit control

Coplanar Stripline (CPS) Components

Full‐wave FDTD design and analysis of wideband microstrip‐to‐waveguide transitions

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