W band technologies for data collection experiment of the DAVID mission

A transmission from coplanar to WR10 waveguide and a polarization chain, working in W band, were designed and measured. A very compact polarizer has been designed and simulated with full 3D electromagnetic software to work in the W band. A prototype has been built using the electroforming technique to evaluate its electrical performances. The coplanar to waveguide transition makes use of the classical 90° mounting schemes of the microstrip to waveguide transition permitting a fully hermetic transition to be realized in W band. A prototype constructed on alumina substrate and WR10 waveguide flange was simulated with a full 3D electromagnetic simulator. A back-to-back transition prototype was constructed and measured to verify the agreement with the simulated results. The results are also compared to those obtained from the commercial electromagnetic software CST microwave studio.