Design of coaxial-line/rectangular-waveguide transitions

Abstract

The design of coaxial-line/rectangular-waveguide probe transitions and the available theories which may be used are briefly reviewed. The usefulness of the theoretical treatments are assessed by comparing results predicted by them to experimental results obtained for a test case.

Design of coaxial line-to-circular waveguide transitions

“…Fig. 4 compares this dependency to the normalised input resistance obtained from Microwave Studio as a function of w. The two results are quite different, and this observation is similar to that reported for the rectangular waveguide [7]. Notwithstanding the computational complexity involved, clearly the results from [2] may not be sufficiently accurate for design purposes.…”

“…Circular waveguide on the other hand, notwithstanding its unique advantages: e.g., rotationally symmetric property, easy manufacturability and reduced cost for custom construction, has received much less attention in the past and is only used in limited applications. An impediment in using circular waveguide is the dearth of design information available for elementary circular waveguide devices (such as coaxial line-to-waveguide transitions and reactive obstacles [1][2][3]), in contrast to the well-established rectangular waveguide (e.g., [4][5][6][7][8]). …”