Abstract: A support structure for space-based antennas. The structure includes a boom and core and spacer boards disposed along a length of the boom. The boom extends through an opening in each board. Antenna elements are attached to core boards. A top board is rotatably affixed to a first end of the boom and a bottom board affixed to a base surface of a stow tube in which all the elements are stored prior to deployment. A material of the antenna elements comprises a flexible material, allowing the elements to be stowed in a restricted volume of the stow tube prior to deployment into an operational configuration. Tension cords, disposed longitudinally along the boom and attached to each one of the core and spacer boards, are tensioned after deployment to ensure the core boards and the antenna elements thereon are spaced apart as required.