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With the increasing volume of aviation flight test data, the original IRIG106 telemetry system has not been fully adapted to current and future needs. At the same time with the continuous development of network technology, telemetry system network has become a new development trend. The fourth generation mobile communication occupies the S-band telemetry resources so that the aerial telemetry searches for new transmission bands. In order to make full use of and protect existing resources and adapt to the development of telemetry network, this paper proposes to increase the data transmission function of C-band network on the basis of existing S-band telemetry and carry out research on dual-band telemetry antenna design. Based on the properly design of antenna structure, the integrated feed design project is proposed. Through the integrated design of S-band and C-band dipoles, common transmission of C-band wireless network data and S-band telemetry data has been implemented. Telemetry data rate has been improved and the absence of telemetry frequency resource has been alleviated. Verified by flight tests, the design of dual band antenna can meet the transmission requirements of high rate data.