End launch connectors are used to transition microwave energy from coaxial to planar transmission-line structures. Test boards, chip demo sets, and applicable process boards use end launch connectors to connect test-line coaxial cables to grounded coplanar waveguide (GCPWG) and microstrip circuits. Chip and package testing often goes to a minimum of three times the operating frequencies to look for harmonics, which pushes demand for higher-frequency models. In-line or horizontal (where mating is parallel to board) connectors or vertical-mount designs are most common.
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