Abstract: A high density electronic switching matrix (ESM) includes several splitting modules (200) arranged along a first axis, each including a signal input (202) and several splitter outputs (204). The ESM (500, 600) further includes several switching modules (400) arranged along a second axis perpendicular to the first axis. Each switching module (400) includes switching inputs (402) coupled individually to an output of each of the splitting modules (200). The ESM (500, 600) is further characterized by couplings between the splitter modules and the switching modules. The couplings are formed by mating male and female connectors (300) integrated into the splitting modules and the switching modules. The couplings support extremely high frequency operation. The splitting modules (200) and the switching modules (400) may thus be coupled closely together to form a dense, high frequency, switching matrix, and may be stacked upon one another.