Abstract
Digital radio frequency (DRF) of radio platforms is the key to enhancing the fundamental capabilities of radio systems, such as adaptive capability, maneuverability, transmission capability, and integration capability, in the complex electromagnetic environment. This paper first analyses the demands of RF technology development, introduces the research advance in this field both at home and abroad, and illuminates the principle of the contradiction among major indices of analog RF power amplifier (ARFPA). Further, it extends the DRF concept to integrated digital radio frequency (IDRF) with an emphasis on the principles and advantages of the core technology of DRF-digital RF power amplifier (DRFPA) and all-digital transmitter (ADTx). This paper proposes a DRF design based on combination of system design and techniques, presenting a physical model of DRFPA and an architecture of the ADTx, and gives suggestions for independent development of DRF technologies in China. DRF is revolutionary as well as feasible for advanced radio platforms. Developing its core technologies independently is crucial to China, otherwise China will suffer from an Achillesheel.
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