Direct Digital-to-Physical Synthesis: From mmWave Transmitter to Qubit Control
This work addresses the need for high-speed wireless connectivity and scalable quantum information processing, but it is incremental as it focuses on analyzing existing techniques rather than introducing new methods.
The paper tackles the problem of generating precise radio frequency waveforms for millimeter-wave communication and quantum computing by analyzing direct-digital modulation techniques, showing that architectural innovations in one domain can benefit the other.
The increasing demand for high-speed wireless connectivity and scalable quantum information processing has driven parallel advancements in millimeter-wave (MMW) communication transmitters and cryogenic qubit controllers. Despite serving different applications, both systems rely on the precise generation of radio frequency (RF) waveforms with stringent requirements on spectral purity, timing, and amplitude control. Recent architecture eliminates conventional methods by embedding digital signal generation and processing directly into the RF path, transforming digital bits into physical waveforms for either electromagnetic transmission or quantum state control. This article presents a unified analysis of direct-digital modulation techniques across both domains, showing the synergy and similarities between these two domains. The article also focuses on four core architectures: Cartesian I/Q, Polar, RF- Digital-to-Analog Converter (DAC), and harmonic/subharmonic modulation across both domains. We analyze their respective trade-offs in energy efficiency, signal integrity, waveform synthesis, error mitigations, and highlight how architectural innovations in one domain can accelerate progress in the other