▎ 摘　　要

NOVELTY - The component has a metal conducting layer placed on a dielectric substrate (22), where the layer comprises two metal conducting parts (28) that are separated by an insulation (36). A graphene layer (30) is placed such that a radio frequency or microwave frequency signal crosses the graphene layer when the signal is transmitted between the conducting parts. The graphene layer is subjected to an electric potential to transmit the signal according to a direction and attenuate the signal according to another direction, which is opposite to the former direction. USE - Microelectronic component for a passive radio frequency integrated circuit in a radio frequency or microwave frequency telecommunications system such as wireless-aware radar system or telephony system. ADVANTAGE - The graphene layer is subjected to the electric potential to transmit the signal according to the direction and to attenuate the signal according to another direction, which is opposite to the former direction so as to ensure the properties of electromagnetic polarization of the radio frequency or microwave frequency signal by the graphene layer, and the component can transmit the radio frequency or microwave frequency signal according to a privileged direction in a cost effective manner. DESCRIPTION OF DRAWING(S) - The drawing shows a longitudinal sectional view of a non-reciprocal transmission line of a microelectronic component. Transmission line (20) Dielectric substrate (22) Metal conducting parts (28) Graphene layer (30) Insulation (36)