JERUSALEM, Aug 12 (Reuters) - Israeli defence electronics firm Elbit Systems reported on Thursday higher quarterly profit, boosted by a jump in revenue.

The maker of drones, pilot helmet displays and cyber security systems said it earned $2.11 per diluted share excluding one-time items in the second quarter, up from $1.56 a year earlier. Revenue rose to a record $1.3 billion from $1.08 billion, partly helped by its acquisition of Sparton Corp in April.

Its backlog of orders rose to $13.6 billion at the end of June from $11.8 billion at the end of March. Some 51% of the backlog is scheduled to be performed during the remainder of 2021 and in 2022.

Elbit declared a dividend of 46 cents per share for the second quarter, up from 44 cents in the first quarter. (Reporting by Steven Scheer Editing by Ari Rabinovitch)