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This paper presents a novel tunable microstrip attenuator, based on few-layer graphene flakes. The attenuator consists of a microstrip line with two pairs of graphene pads located between the microstrip line and metal vias, positioned at the two sides of the microstrip line. In the proposed device, the insertion loss can be changed electronically by varying the applied control voltage. The structure...
In this work, two different types of tunable attenuators based on graphene are presented and a comparative analysis of their design and functionality is performed. A preliminary solution of the tunable attenuator has been recently proposed, based on a graphene patch deposited in the gap of a microstrip line: it results in wide band functionality from DC to 20 GHz, with a tunability of 7 dB and minimum...
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