Abstract: A balun circuit is disclosed. The balun circuit has an unbalanced port and a balanced port, wherein the balanced port comprises a first terminal, and a second terminal. The balun circuit further comprises a main line having a first end and a second end, the first end being coupled to the unbalanced port. Moreover, the balun circuit comprises a first sub-line electromagnetically coupled to the main line, the first sub-line having a first end and a second end, wherein the first end of the first sub-line is coupled to the first terminal of the balanced port. The balun circuit further comprises a second sub-line electromagnetically coupled to the main line, the second sub-line having a first end and a second end, wherein the first end of the second sub-line is coupled to the second terminal of the balanced port.

Abstract: A tunable electromagnetic delay line, comprising a first conductor with a first main direction of extension. The first conductor is arranged on top of a non-conducting substrate. The delay line additionally comprises a layer of a ferroelectric material with first and second main surfaces. The layer separates the first conductor and the substrate. The delay line also comprises a second conductor with a second main direction of extension, with the first and second main directions of extensions essentially coinciding with each other, and with the first and second conductors being each other's mirror image with respect to an imagined line in the center of the delay line along the first and second main directions of extension. The tuning is accomplished by applying a voltage between said first and second conductors.

Abstract: The present invention relates to a tunable microwave arrangement (10) comprising a microwave/integrated circuit device (11) and a substrate (6). It comprises a layered structure disposed between said microwave/integrated circuit device and said substrate (5), said layered structure acting as a ground plane and it comprises at least one regularly or irregularly patterned first metal layer (1), at least one second metal layer (3), at least one tunable ferroelectric film layer (2), whereby said layers are so arranged that the ferroelectric film layers) (2) is/are provided between the/a first metal layer (1) and the/a second metal layer (3).

Abstract: The present invention relates to a tunable microwave arrangement (10) comprising a microwave/integrated circuit device (11) and a substrate (6). It comprises a layered structure disposed between said microwave/integrated circuit device and said substrate (5), said layered structure acting as a ground plane and it comprises at least one regularly or irregularly patterned first metal layer (1), at least one second metal layer (3), at least one tunable ferroelectric film layer (2), whereby said layers are so arranged that the ferroelectric film layers) (2) is/are provided between the/a first metal layer (1) and the/a second metal layer (3).

Abstract: A tunable electromagnetic delay line, comprising a first conductor with a first main direction of extension, said first conductor being arranged on top of a non-conducting substrate, characterized in that the delay line additionally comprises a layer of a ferroelectric material with first and second main surfaces, which layer separates the first conductor and the substrate, and in that the delay line also comprises a second conductor with a second main direction of extension, with the first and second main directions of extensions essentially coinciding with each other, and with the first and second conductors being each other's mirror image with respect to an imagined line in the center of the delay line along said first and second main directions of extension, said tuning being accomplished by applying a voltage between said first and second conductors.