Improved Accuracies for Rectangular Waveguide Data

A survey of published tables has shown that numerical inaccuracies exist in well-established tables for rectangular waveguide sizes and cut-off frequencies. These issues become increasingly serious at millimetre-wave frequencies. The reasons are a mix of historical, numerical or simply typographical errors. In addition it is observed that standards also need extending into the terahertz range. New tables have been calculated which are fully consistent with modern CAD tools and modern millimetre-wave and terahertz developments. Recommendations for revised rectangular waveguide standards are also proposed