A System for Quantitative Chronic Exposure of a Population of Rodents to UHF Fields

A system has been developed for economically exposing a large portion of rodents on a long-term basis without disturbing their normal laboratory living patterns. The use of separate cells consisting of cylindrical wave-guide excited with circularly polarized guided waves provides relatively constant and easily quantifiable coupling of the fields to each animal, regardless of their position, posture, and moving patterns. The VSWR to each cell is sufficiently low that any number of cells can be coupled to a single source through a power splitter without the need for isolation circuitry.