Power divider is a key component in RF (Radio Frequency) systems designed for high-power applications. This device serves as both a power combiner and a splitter, effectively splitting the input RF signal into multiple paths or combining signals from different sources. Although the three-resistor power divider and the two-resistor power divider are similar components, they have different characteristics. Therefore, both have the most suitable and different use cases, which means they are not interchangeable. Although they look very similar, their functions and application scenarios are vastly different. This article will explore the differences between these two allocators.