UNIAXIAL DIELECTRIC RODS IN CYLINDRICAL CAVITIES.
Abstract
In frequency regions well above the lowest resonant frequencies of a circularly cylindrical cavity, the mode density, i. e., the number of modes within a given, relatively small frequency interval, is generally quite high, and the identification of experimentally found resonances with specific cavity modes cannot usually be accomplished by frequency considerations alone. Two techniques useful in such identifications are presented here. One of these can be employed to gain information concerning the angular periodicity, of the mode, while the other gives an indication of its axial periodicity. A new method of measuring the dielectric constants (tensor) of a uniaxial material, which is based on the exact solution of a large dielectric rod located in a circularly cylindrical cavity is also presented. The characteristic equations required in this connection have been derived and are given. The techniques for identifying modes, as well as the dielectric constant measurement method, have been tested against theoretical computations (as far as this is possible) and have been found to be sound. Explicit values for the (X-band) dielectric constants of ruby have been determined experimentally. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0601693
Entities
People
- Ross F. Lohr Jr
Organizations
- New York University Tandon School of Engineering