Theoretical and Experimental Investigation of Asymmetric Coplanar Waveguides (Short Papers)

Hanna, Victor Fouad; Thébault, D.

doi:10.1109/tmtt.1984.1132906

Cited by 64 publications

(39 citation statements)

References 5 publications

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“…However it is less than the deviation between two existing methods [10,11]. Table 1 compares the computation of characteristic impedance as computed by the present method, and also by other methods [6,7], against the experimental results obtained by the timedomain reflectometer with a 35-ps rise-time pulse, which corresponds to a frequency range from dc to 9.85 GHz. Six ACPW lines are considered on an alumina substrate with ε r = 9.9, h = 0.635 mm and gold strip thickness 4.0 µm.…”

Section: Comparison Of Results Of Cpw and Acpw Against Full-wave And mentioning

confidence: 95%

“…This section covers validation in three steps: i. Comparison of the present models against the full-wave and experimental results [6,7,8,12]. ii.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The CPW structures, available in several formats and their circuit and component applications, are summarized in book form [1][2][3]. Several static and full-wave numerical methods have been used to analyze the CPW structures [3][4][5][6][7][8]. Using these methods, CPW on the anisotropic substrates have been also studied by several investigators [9][10][11]; as some practical substrates have anisotropy that must be accounted for in computation of the line parameters.…”

Section: Introductionmentioning

confidence: 99%

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Modeling for Dispersion and Losses of Multilayer Asymmetric CPW on Iso/Anisotropic Substrate

Verma

Singh

Bansal

2013

PIER B

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Abstract-In this paper, we reformulate the quasi-static spectral domain analysis (SDA) applicable to a lossy anisotropic multilayer asymmetric coplanar waveguide (ACPW). The SDA formulation also incorporates two-layer model of a conductor thickness and the concept of effective permeability to account for the low frequency dispersion due to the magnetic field penetration in an imperfect conductor. The paper further presents the single layer reduction (SLR) formulation and circuit model to compute frequency dependent line parameters of a lossy anisotropic multilayer ACPW. The accuracy of formulation is comparable to that of the HFSS and CST, without using complex and time consuming full-wave methods. The results of CST for ε eff , Z 0 , α d , α c of multilayer ACPW, in the frequency range 1 GHz-100 GHz, deviate from results of HFSS up to 0.49%, 1.53%, 2.06% and 10.73% respectively; whereas corresponding deviations of the present SDA and SLR combined formulation are up to 1.38%, 2.09%, 3.57% and 8.87%.

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Section: Comparison Of Results Of Cpw and Acpw Against Full-wave And mentioning

confidence: 95%

“…This section covers validation in three steps: i. Comparison of the present models against the full-wave and experimental results [6,7,8,12]. ii.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling for Dispersion and Losses of Multilayer Asymmetric CPW on Iso/Anisotropic Substrate

Verma

Singh

Bansal

2013

PIER B

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“…As expected, this nonreciprocal effect exists only if a perpendicular polarization of the ferrite thin film is applied and if an absorber is located at one coplanar line side. The dimensions of the asymmetrical coplanar line are chosen to keep a quasi-TEM propagation mode [8,9], as S = 72 µm, W 1 = 40 µm, W 2 = 1200 µm, h = 635 µm, physical length 5 mm and 100 µm thickness of graphite. A taper is added for a good matching (50 Ω).…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Simulation Results on a New Non Symmetrical Coplanar Isolator Structure Using Magnetic Thin Film

Kirouane

Verney²,

Vincent³

et al. 2009

PIER Letters

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Abstract-The non reciprocal effect of such devices as microstrip and coplanar isolators can be based on the field displacement phenomenon induced by a magnetized ferrite material. The structure under study is made from a ferrite thin-film deposited on a alumina substrate. A non symmetrical coplanar line is put on the ferrite film and the absorber is made from either a graphite film or a Tantalum Nitride film or a copper slab. In order to work in millimeter wave range the barium ferrite was selected. Moreover, the size of the component could be less than the circulator one. The small size and simple shape are the principal advantages of a coplanar isolator structure.

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“…The characteristic impedance of an asymmetric CoPlanar Waveguide (CPW), see figure 6, on a half space dielectric slab ( t→∞) of relative permittivity ε r is given by, [9] Figure 6: Asymmetric coplanar waveguide.…”

Section: Analogy With Asymmetric Coplanar Waveguidementioning

confidence: 99%

Improved design equations for asymmetric coplanar strip folded dipoles on a dielectric slab

Visser¹

2007

2nd European Conference on Antennas and Propagation (EuCAP 2007)

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Link to publication Citation for published version (APA):Visser, H. J. (2007). Improved design equations for asymmetric coplanar strip folded dipoles on a dielectric slab. In The Second European Conference on Antennas and Propagation, 2007. EuCAP 2007. 11-16 November 2007. London: Institution of Engineering and Technology (IET). General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractDesign equations for the input impedance of the asymmetric strip folded dipole, developed by Lampe, [2,3], depend, amongst others, on the characteristic impedance of an asymmetric coplanar strip (CPS) transmission line. Lampe assumes a homogeneous surrounding medium. In practice, the antenna will be realised on a dielectric slab. Employing the Lampe equations for this inhomogeneous case may lead to relative errors in the CPS characteristic impedance as much as 32% and therefore to large errors in the input impedance. Improved design equations for the input impedance are discussed for the inhomogeneous case. These improved design equations rely on an accurate calculation of the characteristic impedance of an asymmetric CPS on a dielectric slab and further employ correction factors applied to the homogeneous case dipole length and equivalent radius.

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Theoretical and Experimental Investigation of Asymmetric Coplanar Waveguides (Short Papers)

Cited by 64 publications

References 5 publications

Modeling for Dispersion and Losses of Multilayer Asymmetric CPW on Iso/Anisotropic Substrate

Modeling for Dispersion and Losses of Multilayer Asymmetric CPW on Iso/Anisotropic Substrate

Simulation Results on a New Non Symmetrical Coplanar Isolator Structure Using Magnetic Thin Film

Improved design equations for asymmetric coplanar strip folded dipoles on a dielectric slab

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