A high-frequency device (100;300) comprising: a signal electrode (101,301); a first ground electrode (102; 302) arranged in parallel with the signal electrode; a first liquid crystal layer (103;203;303) disposed between the signal electrode and the first ground electrode; and a first dielectric layer disposed between at least one of the first liquid crystal layer and the first ground electrode or between the signal electrode and the first liquid crystal layer, wherein the first dielectric layer has a dielectric constant that is larger than a dielectric constant of the first liquid crystal layer, characterized in, that the signal electrode is configured with a combination of first longitudinal segments (311,313), the first longitudinal segments separated by first gaps between adjacent first longitudinal segments, the first longitudinal segments (311,313) extending in a first direction while being arranged in a second direction perpendicular to the first direction, wherein the second direction is a width direction of the liquid crystal layer, the first ground electrode is configured with a combination of second longitudinal segments, separated by second gaps between adjacent second longitudinal segments, the second longitudinal segments extending in the first direction while being arranged in the second direction, the high-frequency device further comprises first distribution electrodes (307a, 307b) arranged near respective ends of the first longitudinal segments and near respective ends of the second longitudinal segments in the first direction, the first distribution electrodes each have a solid plate shape having a width that covers at least some segments of the first and second longitudinal segments, and are separated from each of the signal electrode and the first ground electrode by an insulating layer, a distance between the first longitudinal segments and a distance between the first distribution electrodes, a dimension of each of the first and second longitudinal segments and the first distribution electrodes, and a material that forms the insulating layer are selected such that - the first longitudinal segments are configured to form capacitive coupling between adjacent first longitudinal segments and are configured to form a tangential electric field in the second direction according to an applied control voltage applied to at least two segments of the first longitudinal segments, and - neighboring first distribution electrodes are spaced apart from each other. a signal electrode (101,301); a first ground electrode (102; 302) arranged in parallel with the signal electrode; a first liquid crystal layer (103;203;303) disposed between the signal electrode and the first ground electrode; and a first dielectric layer disposed between at least one of the first liquid crystal layer and the first ground electrode or between the signal electrode and the first liquid crystal layer, wherein the first dielectric layer has a dielectric constant that is larger than a dielectric constant of the first liquid crystal layer, characterized in, that the signal electrode is configured with a combination of first longitudinal segments (311,313), the first longitudinal segments separated by first gaps between adjacent first longitudinal segments, the first longitudinal segments (311,313) extending in a first direction while being arranged in a second direction perpendicular to the first direction, wherein the second direction is a width direction of the liquid crystal layer, the first ground electrode is configured with a combination of second longitudinal segments, separated by second gaps between adjacent second longitudinal segments, the second longitudinal segments extending in the first direction while being arranged in the second direction, the high-frequency device further comprises first distribution electrodes (307a, 307b) arranged near respective ends of the first longitudinal segments and near respective ends of the second longitudinal segments in the first direction, the first distribution electrodes each have a solid plate shape having a width that covers at least some segments of the first and second longitudinal segments, and are separated from each of the signal electrode and the first ground electrode by an insulating layer, a distance between the first longitudinal segments and a distance between the first distribution electrodes, a dimension of each of the first and second longitudinal segments and the first distribution electrodes, and a material that forms the insulating layer are selected such that - the first longitudinal segments are configured to form capacitive coupling between adjacent first longitudinal segments and are configured to form a tangential electric field in the second direction according to an applied control voltage applied to at least two segments of the first longitudinal segments, and - neighboring first distribution electrodes are spaced apart from each other. - the first longitudinal segments are configured to form capacitive coupling between adjacent first longitudinal segments and are configured to form a tangential electric field in the second direction according to an applied control voltage applied to at least two segments of the first longitudinal segments, and - neighboring first distribution electrodes are spaced apart from each other.