The QUH series of E & H plane waveguide tees from Quinstar operate from 12.4 to 220 GHz. The E-plane tees consist of a length of standard flanged waveguide with a perpendicular E-plane coupling arm symmetrically located on the broad waveguide wall. Input power is divided equally and in opposite phases between the two outputs. The H-plane tees feature an H-plane coupling arm located on the narrow waveguide wall. Power at the coupling arm input is divided into equal signals in phase at the main outputs. These devices are available in standard waveguide sizes. Neither the E or H plane tees have matched junctions and therefore they are not recommended for low VSWR applications.