Coaxially fed hollow cylindrical monopole in a rectangular waveguide

Analysis of a coaxially fed monopole in a rectangular waveguide

“…Fig. 4 shows the input admittance of a coaxially fed monopole in a rectangular waveguide versus [8], and numerical results in [8], respectively.…”

“…The solution to the problem of a coaxially fed monopole in a parallel-plate waveguide is available in [12]. When a coaxially fed monopole is in a parallel-plate waveguide, the summation over in (13) vanishes, thus reducing (8) and (9) into the solution (9) and (12) in [12]. Based on residue calculus, the sum of reflected and scattered TEM fields at in region is given by…”

Variable-length cylindrical post in a rectangular waveguide

“…the inductive post case) and is given by eqn. 32, whereas l%z, z') is the sum of the exterior and interior current Green's functions [8,9], namely…”

“…It is shown that the variable-length post problem may be analysed by the method presented previously [8,9] for the coaxially excited probe. In this approach, the electric field off the end of the post is treated as the unknown, which may be solved using an integral-equation approach with an infinite Chebyshev-series representation for the unknown field.…”

Design of coaxial-line/rectangular-waveguide transitions

“…More recently, an alternative analysis has been presented (Williamson 1976) which uses the results of a study of related problems (Williamson 1982 a, b) together with the approach outlined in Williamson and Otto (1973) with an additional modification to account for the short-circuit in the waveguide. This approach, hereafter referred to as the Williamson analysis, has the advantage that the current distribution is determined in the course of the calculations (rather than assumed as in the earlier analyses), and the form of the coaxial aperture source is taken into account.…”