Electrical transmission line arrangement with a cross-over

The invention relates to an electrical transmission arrangement comprising a first strip-line conductor which has its main extension in a first direction in a first plane in the transmission arrangement and comprises a conductor, an upper ground plane which is situated at an upper distance from the conductor and a lower ground plane which is situated at a lower distance from the conductor, and a second strip-line conductor which has its main extension in a second direction in a second plane in the transmission arrangement and comprises a conductor, an upper ground plane which is situated at an upper distance from the conductor and a lower ground plane which is situated at a lower distance from the conductor, where the ground planes are separated from their respective conductors and from one another by a dielectric material, in which transmission arrangement the lower ground plane of the first strip-line conductors coincides with the upper ground plane of the second strip-line conductors at at least one point. At the point, where the lower ground plane of the first strip-line conductor coincides with the upper ground plane of the second strip-line conductor, the main direction of extension of the first strip-line conductor crosses the main direction of extension of the second strip-line conductor, and the second strip-line conductor extends in a third plane in the transmission arrangement at this crossing point, whereby the second strip-line conductors exhibit electrical connections between adjacent planes, which connections connect the conductors of the second strip-line conductor, upper ground planes and lower ground planes to corresponding components in adjacent planes.