Large deployable reflector (LDR) is state-of-the-arts technology in communication satellites to achieve some satellite communication services. Government agencies of Japan are planning some experiments on communication and broadcasting services via satellite. Engineering Test Satellite VIII (ETS-VIII) will be launched in 2004, and demonstrated satellite voice communication by using cellular phones and high-quality audio broadcasting. An antenna system is combination of the LDR and active-phased-array feeders. The LDR, 20 m along its major axis, based on a modular-mesh concept in which structure consists of several basic modules has extensibility. In order to develop the LDR, the design points on surface accuracy and electrical performance are evaluated. A surface error caused by the assembly of multiple modules was evaluated. The surface accuracy measured data compared with analysis results. Hence, the surface of the LDR was accurate enough within the system requirement. The electrical performance, especially, passive intermodulation (PIM) was measured by using a 7-module reflector. The measured PIM is so small that the LDR is satisfied the system requirements.