Apparatus and associated methods

摘要

A voltage-tunable phase shifter comprising a conducting line and a ground electrode separated by a layer of dielectric material, the phase shifter configured to generate an electric field when a potential difference is applied between the conducting line and ground electrode, the electric field configured to change the phase of an electromagnetic signal propagating along the conducting line, wherein the ground electrode comprises graphene, and wherein the change in phase is dependent upon the strength of electric field and can be controlled by varying the potential difference between the conducting line and the ground electrode.

主权项

1. An apparatus comprising a voltage-tunable phase shifter further comprising a first conductor and a second conductor separated by a layer of dielectric material, wherein the first conductor, the second conductor, and the dielectric material are configured as a radio frequency transmission line, wherein the phase shifter is configured to generate an electric field when a voltage is applied between the first conductor and the second conductor, wherein the electric field is configured to change the phase of an electromagnetic wave propagating along the first and second conductors, wherein the second conductor comprises graphene, wherein the change in phase of the electromagnetic wave is dependent upon a quantum capacitance of the graphene second conductor, and wherein the change in phase is dependent upon the strength of the electric field and can be controlled by varying the voltage between the first conductor and the second conductor.