Design Of A Single-Ridged Waveguide Test-Set For The 28 GHz Band

This paper describes the design of a novel test-set for single-ridged waveguides in the 28.5 GHz band. The test-set composes of three main parts: a waveguide transformer with a 90° bend, a part of an antenna array (slots) represented by a ridged waveguide transmission line and a load. The transformer provides a single-ridged-waveguide-to-standard-WR-28 transition and vice versa. This transition forms the interface to the measurement equipment and parts of its design will also be applied to the original design of the antenna. The load can be tested by connecting it to the single-ridged output port of the adapter or to the waveguide transmission line. This saves precious development time and costs, and enables also an accurate verification of the adapter design. The waveguide transmission line can be used to test different slot configurations. Some simulations have been performed to investigate the tolerance values required for manufacturing the test-set.