Abstract
In this letter, a laser-scribed graphene (LSG) fabrication method is used to create graphene to be used in a microwave application, for example, a voltage-tunable microstrip attenuator. Graphene used in microwave circuits, such as tunable attenuators, usually focuses on using exfoliated graphene, deposited graphene nanoplatelets, or microwave irradiation. It will be demonstrated that the fabrication of LSG from graphene oxide on standard double-sided FR-4 copper-clad substrate can be used as a voltage-controlled resistor that results in a tunable microstrip attenuator across the microwave frequencies from 50 MHz to 5.5 GHz.
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