A symmetrically configured class of bootlace lenses (also known as Gent or Rotman lenses) is analyzed. These trifocal lenses are used to feed haft-wave spaced linear arrays to form a set of multiple beams. The lens dimensions are scaled' so that all lenses have transmission characteristics equivalent to those of a Butler matrix with the same number of ports. The relationship between the focusing characteristics and the lens dimensions is calculated, and it is shown that these symmetrically configured lenses form a one-parameter family. Design equations are derived, and a design procedure is described. It is found that, for a wavefront tolerance of±λ/16, the maximum usable array length varies from20 200 the ratio of lens width to array length varies from one to 1.6.
No takes yet. Share an insight, caveat, or question.
J. C. Shelton (1978) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: