A 0.5-20 GHz RF Silicon Photonic Receiver with 120 dB•Hz2/3 SFDR using Broadband Distributed IM3 Injection Linearization

Navid Hosseinzadeh,James F Buckwalter,Aditya Jain,Kang Ning,Roger Helkey

doi:10.1109/rfic.2019.8701871

A 0.5-20 GHz RF Silicon Photonic Receiver with 120 dB•Hz2/3 SFDR using Broadband Distributed IM3 Injection Linearization

Navid Hosseinzadeh, James F Buckwalter + Show 3 more

https://doi.org/10.1109/rfic.2019.8701871

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Publication Date: Jun 1, 2019

Citations: 16

Affiliation: University of California, Santa Barbara

#Spur-free Dynamic Range #Radio-over-fiber + Show 8 more

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Abstract

Radio-over-fiber (RoF) supports microwave and millimeter-wave communication with remote antenna heads. However, RoF links suffer from low spur-free dynamic range (SFDR) due to the low gain and high nonlinearity of silicon photonic (SiP) Mach-Zehnder modulators (MZM). This work demonstrates the first distributed silicon-germanium (SiGe) HBT LNA co-designed for linearization of a broadband SiP-based RoF link. The SiGe LNA features a distributed LNA intermodulation (IM) injection scheme that is inherently wideband, improving IIP3 over a 10 GHz range. The assembled SiGe LNA and SiP MZM prototype demonstrates an SFDR as high as 120dB•Hz2/3 at 9 GHz, a 19 dB improvement over previous SiP RoF links.

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