Impedance Matching of a Dielectric-Loaded Waveguide Radiator in a Phased Array

摘要

In considering the general problem of impedance matching reduced-size, dielectric-loaded waveguide elements in a phased array, various commonly used matching devices were reviewed. A design method based on pattern search is introduced here for matching a high-VSWR load. As an example, a two-section transformer has been designed for matching waveguide radiators in a phased array. The waveguide load before matching has a VSWR of about 7 to 8 across a 10-percent band (plus or minus 5 percent of the center frequency). After matching, the VSWR is approximately 1.25 and quite constant over the band, having maximum values of 1.77 and 1.52 respectively at the lower and upper edges of the band. (Author)