Unrestricted Resolution Spectrogram Analyzer

Digital Fast Fourier Transform (FFT) is at the heart of current spectrogram analyzers. It is performed numerically over stored buffer to obtain instantaneous spectral components of a test signal for plotting the spectrogram.
Because of the inherent limitations of FFT (computational requirements, trade-off between frequency resolution and time), current technologies are limited up to only a few hundred megahertz of acquisition bandwidth and to a spectrogram resolution of a few microseconds.

The proposed system provides a unique solution to these limitations.

The fundamental property of a CRLH antenna (i.e. backfire-to-endfire beam-scanning antenna, see figure 1) is used to radiate different frequencies in different directions (to perform a Fourier separation).

This signal is then sensed by various field probes (see figure 2) placed at specific locations in the far-field of the antenna. Finally, the probed signals are combined to form the spectrogram of the signal in real-time.

• Real-time monitoring of UWB signals
• Single shot signal measurement and characterization
• Time and frequency independent
• Almost no computing resources required

This system is fully tested and characterized with a first prototype (Simulation results available)

This technology is now fully tested in labs. We're seeking a strategic partner interested in moving to commercialization.