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Related Concept Videos

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The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx and a shunt capacitance CΔx.
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Updated: Jun 20, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Expressions for the coupling coefficient of a rectangular-waveguide directional coupler.

M Kuznetsov

    Optics Letters
    |September 1, 2009
    PubMed
    Summary
    This summary is machine-generated.

    New dielectric rectangular-waveguide directional coupler expressions provide more accurate coupling coefficients. This corrects previous overestimations, improving accuracy for critical applications.

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    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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    Last Updated: Jun 20, 2026

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
    11:08

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
    12:18

    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

    Published on: August 5, 2013

    Area of Science:

    • Electromagnetics and Wave Propagation
    • Microwave Engineering

    Background:

    • Dielectric rectangular waveguides are crucial components in microwave and millimeter-wave integrated circuits.
    • Directional couplers are fundamental for signal splitting and combining, but accurate modeling is essential.

    Purpose of the Study:

    • To derive more accurate analytical expressions for the coupling coefficient in dielectric rectangular-waveguide directional couplers.
    • To address the limitations of existing models that can overestimate coupling.

    Main Methods:

    • Utilizing advanced electromagnetic field analysis techniques.
    • Developing novel mathematical formulations for waveguide coupling parameters.

    Main Results:

    • Obtained significantly more accurate expressions for the coupling coefficient.
    • Demonstrated that previous expressions could overestimate the coupling coefficient by up to a factor of two.

    Conclusions:

    • The new expressions offer improved precision for designing dielectric rectangular-waveguide directional couplers.
    • Accurate coupling coefficient calculation is vital for optimizing device performance in high-frequency applications.