Antenna models
EMI extends well beyond the confines of the assembly-under-review. Analysis of radiated emission and radiated susceptibility calls for a review of the properties of antennae. Fortunately, this review allows many simplifying assumptions to be invoked. Section 5.1 provides a brief overview of the textbook analysis of the half-wave dipole and identifies a very significant parameter; when connected to the output of a radio transmitter which is generating a signal at the half-wave frequency, the dipole exhibits the same characteristics as a resistive load. This has been named the `radiation resistance' and its value has been calculated to be 73 Ω.
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