Using Frequency Diversity to Improve Measurement Speed
Author: Roger Dygert
Conventional antenna measurement systems use a multiplexer or polarization positioner to sequence polarization and or antenna elements as a function of time, requiring two or more measurement intervals. However, a simpler, more cost effective, and faster technique can be implemented by using frequency diversity to distinguish between polarizations or antenna elements. This paper describes how two slightly different frequencies can be used to make two measurements simultaneously instead of sequentially, cutting the measurement time in half or even more. Additional considerations must be taken into account to achieve good measurements. This paper addresses these issues. Actual measurements are presented.