A waveguide to coaxial adapter is a coaxial cable component designed as a transition between a waveguide and a coax connector. Waveguides, true to their name, guide electromagnetic waves of a specific frequency with the least loss of energy possible. Coaxial connectors are cables composed of at least three layers, including a tubular shield, a layer of insulation and a conductive material. A waveguide to coaxial adapter allows for electromagnetic waves with different modes to be coupled, and thus transforms waveguide transmission lines into coaxial lines or vice versa. Waveguide to coax adapters consist of the waveguide component, which fits the waveguide tubing and ends in a flange, and a probe assembly that includes a coaxial adapter and connection hardware. Waveguide adapters aid in coaxial cable simulations, in which the return loss, power loss and near field plots in the E and H planes are all measured and analyzed. They are designed to provide enhanced RF performance, resulting in characteristics like low insertion loss and low VSWR. When selecting a waveguide to coaxial adapter, choosing the correct connector type, flange materials, flange types and flange profiles is essential to achieving your desired RF performance.