RIDGE WAVEGUIDE DIRECTIONAL COUPLERS
Abstract
An approximate determination of the dominant-mode fields in ridge waveguides at all frequencies was made. Evaluations of the fields along the walls of a commercially standard single-ridge guide having a usable frequency range from 3.75 to 15.0 gc, and a commercially standard doubleridge guide having a usable frequency range from 4.7 to 11.0 gc were carried out, and graphs drawn so that the results could be applied in practical situations. Using Bethe's smallaperture theory, design formulas were developed for simple cross-guide directional couplers in both single- and double-ridge guide. These formulas and the field-graphs were used to design and construct two cross-guide couplers. Design formulas were developed for multi-hole, broadwall coupled ridge-waveguide directional couplers. The coupling for the single-ridge broad-wall coupler ranged between about 22 and 29 db over the 3.75 to 15.0 gc band. The coupling for the double-ridge broad-wall coupler was between 26 and 33 db over the 4.7 to 11.0 gc range. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0260246
Entities
People
- W.j. Getsinger
Organizations
- SRI International