Answers are grounded in this paper and cite their sources.
Groups of nonresonant closely-spaced slots, cut in the broad wall of a rectangular waveguide, have been studied in a series of experiments. The name "serrated waveguide" has been applied to such structures. The complex propagation constant of the fundamental mode in a serrated waveguide has been measured as a function of slot size and spacing. The results have been used in the design of traveling-wave antennas with various aperture distributions These antennas can be used for flush-mounted applications.
No takes yet. Share an insight, caveat, or question.
Kelly et al. (1957) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: