An electronic modulating device (100, 200, 300, 400, 500A, 500B, 500C, 500D), comprising: a first modulating unit comprising: a first transistor comprising a channel arranged in an extending direction; and a first modulating electrode electrically connected to the first transistor and arranged in a first longitudinal direction, wherein the first longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the first modulating electrode; and a second modulating unit comprising: a second transistor comprising a channel arranged in the extending direction; and a second modulating electrode electrically connected to the second transistor and arranged in a second longitudinal direction different from the first longitudinal direction, wherein the second longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the second modulating electrode; wherein a first included angle (θ A) between the extending direction and the first longitudinal direction is different from a second included angle (θ B) between the extending direction and the second longitudinal direction, and wherein a difference between the first included angle (θ A) and the second included angle (θ B) is ranged from 15 degrees to 90 degrees. a first modulating unit comprising: a first transistor comprising a channel arranged in an extending direction; and a first modulating electrode electrically connected to the first transistor and arranged in a first longitudinal direction, wherein the first longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the first modulating electrode; and a first transistor comprising a channel arranged in an extending direction; and a first modulating electrode electrically connected to the first transistor and arranged in a first longitudinal direction, wherein the first longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the first modulating electrode; and a second modulating unit comprising: a second transistor comprising a channel arranged in the extending direction; and a second modulating electrode electrically connected to the second transistor and arranged in a second longitudinal direction different from the first longitudinal direction, wherein the second longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the second modulating electrode; a second transistor comprising a channel arranged in the extending direction; and a second modulating electrode electrically connected to the second transistor and arranged in a second longitudinal direction different from the first longitudinal direction, wherein the second longitudinal direction is parallel to a long side of a smallest imaginary rectangle that encircles the second modulating electrode; wherein a first included angle (θ A) between the extending direction and the first longitudinal direction is different from a second included angle (θ B) between the extending direction and the second longitudinal direction, and wherein a difference between the first included angle (θ A) and the second included angle (θ B) is ranged from 15 degrees to 90 degrees.