Insignia Description
Two silver beacons, the baskets conjoined at upper edge and ladders reversed, with orange and silver flames, the three areas within the confines of the beacons black with the center area charged with a silver fleur-de-lis all above a silver motto scroll inscribed "FLEXIBILITY, DEPENDABILITY" in black enamel letters.

Symbolism
Flaming beacons are among the oldest devices used for signaling the communication. Two have been used in reference to the sending and receiving of messages and the two poles also simulate the number "11", the organization’s numerical designation. The three black areas and fleur-de-lis refer to the organization’s three battle honors in Europe, World War II.

History
The insignia was originally approved for the 11th Signal Group, on 11 Jun 65 and then redesignated with the motto for the 11th Signal Brigade on 15 Oct 79.

Source: The US Army Institute of Heraldry