Power Flow and Directional Couplers

The previous laboratory introduced two important RF components: the power splitter and the directional coupler. Both of these components are concerned with the accurate division of power flowing into one port and then out from two or more other ports. Power directing components have performance measures of insertion loss, coupling, directivity, and isolation which will be examined in this laboratory. Microwave network theory places some fundamental restrictions on these based upon if the network is reciprocal, lossless, and matched at its ports. While power splitting might seem a simple task, it ends up being far from trivial when realistic network constraints are imposed. This laboratory will examine some of these fundamental limits and their tradeoffs for these two important types of RF components.