Abstract
An efficient semianalytical algorithm for the evaluation of the field and modal excitation by a line source in a two-dimensional electromagnetic bandgap (EBG) waveguide is presented. The method allows for an accurate and efficient calculation of the near field from the source inside the EBG waveguide, as well as the amplitude of the EBG waveguide mode that is excited. The same method can be applied to a wide variety of structures, as well as other types of sources and discontinuities.
Highlights
T HE DESIRE to achieve low-loss propagation in the millimeter-wave and optical ranges has recently motivated research into new ways of guiding electromagnetic waves
To the knowledge of the authors, this is the first time that an algorithm tailored to the efficient calculation of the fields and mode excitation from a source inside of an electromagnetic bandgap (EBG) waveguide has been presented
The method is explained for 2-D EBG waveguides, though the algorithm can be generalized to other EBG structures
Summary
T HE DESIRE to achieve low-loss propagation in the millimeter-wave and optical ranges has recently motivated research into new ways of guiding electromagnetic waves. We demonstrate a new method of moments (MoM)based semianalytical method to efficiently model the fields and the mode excitation inside a two-dimensional (2-D) EBG waveguide. To the knowledge of the authors, this is the first time that an algorithm tailored to the efficient calculation of the fields and mode excitation from a source inside of an EBG waveguide has been presented. (For simplicity, the case of metallic posts is considered here.) The method uses the one-dimensional (1-D) periodicity properties of the waveguide along the direction in order to calculate the field of the line source by means of an array scanning method (ASM) [3], [4]. = infinite array of line sources located in the waveguide. In the ASM, the infinite periodic array is used to synthesize the field due to the single impressed source. The near field from the source, as well as the amplitudes of the guided modes that are launched by the source, can be directly determined
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