I used the high voltage electrical tower to express communication in center of the logo then using cables to attach letters A & U to the letter T to express union between elements (Member States).
Above Displayed the main idea submitted to competition with its concept.

Below there are ideas I worked on also so see them and share your opinion ❤

Concept: Golden Ratio Circles, using the same combination to present the three letters
repeating U expresses the signal

Concept: Receiver Device displays Logo