Abstract: The invention relates to an LDMOS transistor comprising gate, source and drain, and an earth plane located under these. According to the invention, the earth plane is given such an extent in the lateral direction of the transistor that an additional component of chip type can be mounted on it, whereby the LDMOS transistor and the additional component of chip type have a shared earth plane. The earth plane suitably comprises a silicon layer which is doped so that it has become conductive and can thereby constitute the earth plane for the transistor and the additional component of chip type.

Abstract: Circulator unit comprising a first member (1) in a first dielectric layer (3) and a second member (2) in second dielectric layer (4) both members being of ferro-electric material and arranged adjacent to one another, a conductive circulator pattern (10) printed on the first or second member and arranged between the first and the second member. The first substrate extends beyond the second substrate on an area where a first set of terminals is provided rendering the first set of terminals accessible. The second member extends beyond the first member on an area where a second set of terminals is provided rendering the second set of terminals accessible. The unit comprises first (7) and second ground (8) conductors arranged on each side of the first and second members and furthermore comprises at least one magnet (5, 6) or coil for providing magnetic field through the first and second member.

Abstract: The invention relates to an electrical transmission arrangement comprising a first section of a conductor with a main extension in two planes, and a first section of a ground plane which extends essentially in parallel with the conductor section on the first side of the conductor section and has a main extension in the same two planes as the conductor section.