The Resonant Frequency of a Cavity-Type Filter as a Function of the Size of the Coupling IRIS
Abstract
Experiments were conducted to determine the degree to which dependance can be placed upon simple cavity theory for determining the required cavity dimensions of a cylindrical cavity type filter for use at microwave frequencies, and to establish some general rules for determining the size and location of irises to be used in coupling to the cavity. The results show that calculations based upon simple cavity theory are accurate to within two percent, provided certain precautions are taken in determining the size and position of the coupling iris. Primary considerations in iris location are optimum coupling to the desired mode and minimum distortion of the field within the cavity. An iris diameter equal to the narrow dimension of the rectangular wave guide used gave ninety-eight percent power transmission in a mode for the cavity used.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 03, 1949
- Accession Number
- ADB217901
Entities
People
- W. W. Balwanz
Organizations
- United States Naval Research Laboratory