High Sensitivity Envelope Detector Assisted by Microwave Photonics

Abstract

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Radar Receiver with Intrinsic Power Limiter Assisted by Microwave Photonics

“…The transition region between the stopband and transmission band has a roll-off of around 2.86 dB/GHz. This imposes a limitation on the RF flatness response operation band, starting at 10 GHz, considering the laser carrier tuned at the right edge frequency of the optic stopband [6]. The DFB laser operates at a frequency of around 193.23 THz by optical cavity temperature adjusting.…”

“…However, RF envelope detection can be performed directly on the photodetector using the optical selfhomodyne technique [6], [7]. By using photonic RF envelope detection, the expensive high-speed photodetector at the system output is no longer needed, as well as any kind of microwave frequency electronic circuit.…”