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Manual (the default), to specify some search criteria manually. See Manual Mode Search Settings below.
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Region, to define a mode search region in a complex plane. See Mode Search Region Settings below.
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Select Closest in absolute value (the default value) to search for modes that are closest to the shift value when measuring the distance as an absolute value.
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Select Larger real part to search for modes with a larger real part than the shift value.
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Select Smaller real part to search for modes with a smaller real part than the shift value.
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Select Larger imaginary part to search for modes with a larger imaginary part than the shift value.
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Select Smaller imaginary part to search for modes with a smaller imaginary part than the shift value.
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The Boundary Mode Analysis study step stores the frequency fref and propagation constant βref for which it was run. For a TE, TM, or TEM mode, the propagation constant β for an arbitrary frequency f is given by
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The Include geometric nonlinearity check box, Mesh Selection, and Study Extensions are described in Common Study Step Settings. There is also detailed information in the Physics and Variables Selection and Values of Dependent Variables sections.
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