An equivalent circuit model for the coplanar waveguide step discontinuity

Sinclair, Colin; Nightingale, S.J.

doi:10.1109/mwsym.1992.188286

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…Where the ε r,ef f and Z 0 are the effective dielectric constant and characteristic impendence, respectively, of the unloaded transmission line and c is the velocity of light in free space. Z 0 can be achieved by conformal mapping to be [4]: The inductance produced by the discontinuity of saw-shaped CPW transmission line, L ′ is given by:…”

Section: Design Considerationsmentioning

confidence: 99%

An Improved Design for Ka-Band Phase Shifter Using Distributed MEMS Transmission Line Structure

Jin¹,

She²,

Qin³

et al. 2005

PIERS Online

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The paper presents a model which describes the stage circuit of Distributed MEMS Transmission Line (DMTL) phase shifter at Ka band and an approach for DMTL design utilizing the saw-shaped coplanar waveguide(CPW). The result of circuit simulation and full wave analysis prove that the model is in good agreement with theoretical analysis. The model can effectively simplify the design complexity after optimization. Simulation results show that the S 11 and S 21 can achieve-20 dB and-2.5 dB, respectively, and the phase shift arrives at −180 • at Ka band. Comparing with literature data, it has been predicted that S 11 improves about 8 dB and the phase shift can increase about 100 • in the same condition.

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Section: Design Considerationsmentioning

confidence: 99%

An Improved Design for Ka-Band Phase Shifter Using Distributed MEMS Transmission Line Structure

Jin¹,

She²,

Qin³

et al. 2005

PIERS Online

View full text Add to dashboard Cite

show abstract

“…5(b). Some previous literature modeled the step change by a lumped shunt capacitance only and extracted the capacitance from the scattering coefficients [6], [8]. Due to the negligence of equivalent inductance, the obtained results e.g., [6, Fig.…”

Section: Dres(7) = G(f ")U"(") Dr"mentioning

confidence: 99%

“…Some efforts have been made to characterize various CPW discontinuities under the quasi-static approximation. While the published literature provide the equivalent capacitances of CPW discontinuities based on measurements [6] or numerical computations [7], [8], few are available for the equivalent inductance until recently. Bromme et al relied on a unified strip/slot 3-D electromagnetic simulator to investigate the electric properties of various CPW discontinuity structures, but their results lack support from independent evidence [9].…”

Section: Introductionmentioning

confidence: 99%

A moment method analysis for coplanar waveguide discontinuity inductances

Chiu

1993

IEEE Trans. Microwave Theory Techn.

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Based on the concept of duality, the quasi-static equivalent inductance of a coplanar waveguide discontinuity is determined from the equivalent capacitance of its complementary structure, Le., a coplanar strip discontinuity in the free space. For the capacitance calculation, an integral equation governing the excess charge distribution near the discontinuity is solved by the method of moments together with Galerkin's approach. Numerical results for the short end and symmetric step change are presented. The good agreement with the data available from the full-wave analyses reveals that this approach is simple, accurate, and very suitable in the CAD for MMIC.

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Full-wave analysis of coplanar waveguide discontinuities using the frequency domain TLM method

Jin

Vahldieck

1993

IEEE Trans. Microwave Theory Techn.

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An equivalent circuit model for the coplanar waveguide step discontinuity

Cited by 9 publications

References 7 publications

An Improved Design for Ka-Band Phase Shifter Using Distributed MEMS Transmission Line Structure

An Improved Design for Ka-Band Phase Shifter Using Distributed MEMS Transmission Line Structure

A moment method analysis for coplanar waveguide discontinuity inductances

Full-wave analysis of coplanar waveguide discontinuities using the frequency domain TLM method

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