US Patent 7525498 Antenna array

An antenna array includes a folded thin flexible circuit board with a thin dielectric layer and a conductor layer pattern formed on a first surface of the dielectric layer. The circuit board may be folded in a plurality of folds to form a pleated structure. An array of radiator structures is formed on the first surface, A conductor trace pattern is formed on the folded circuit board. A plurality of active RF circuit devices is attached to the folded circuit board in signal communication with the conductor trace pattern.