Open AccessPhotonic down‐conversion and linearisation with tunable IF bandwidth and improved spurious‐free dynamic range
Author(s) -
Zhu Xiang,
Jin Tao,
Chi Hao,
Tong Guochuan,
Li Dong,
Zuo Lulu,
Liu Weimin,
Fu Ying
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.7274
Subject(s) - spurious free dynamic range , intermodulation , sideband , spurious relationship , bandwidth (computing) , radio frequency , dynamic range , compatible sideband transmission , intermediate frequency , modulation (music) , physics , high dynamic range , electronic engineering , distortion (music) , optics , computer science , telecommunications , acoustics , engineering , amplifier , machine learning
A scheme for simultaneous down‐conversion and linearisation of radio‐frequency (RF) signals is proposed and demonstrated. Based on carrier‐suppressed double‐sideband modulation, the input RF signal can be down‐converted to any intermediate frequency (IF) tone in the range of 8–12 GHz. Compared with the down‐conversion scheme with two cascaded intensity modulators, the proposed scheme has improvement of >21 dB of the suppression ratio of third‐order intermodulation distortion and 6.17 dB of spurious‐free dynamic range.