In this paper, an ultrawide-band (UWB) low-cost Radar-over-Fiber (RaoF) system is presented which exploits optical links based on directly modulated-VCSELs for radio frequency signal distribution from/to the base station to/from the transmitter/receiver front-end. The system, which includes packaging and engineering of the remote transmitter and receiver assemblies, has been tested in a controlled indoor environment using inexpensive patch antennas. Experimental results demonstrate that uncooled VCSELs allow direct modulation through 3 GHz-bandwidth UWB signals with carrier frequency of 7.5 GHz. The demonstrated system guarantees a power budget of 116 dB with a dynamic range of 66 dB, including signal pre-emphasis for in-band equalization compensating for the frequency response of both the packaged VCSEL-on-PCB and the patch antennas gain. The obtained results demonstrate the feasibility of such a low-cost solution for any scenario where remoting of transmitter and receiver up to a few kilometers is desirable together with a high resolution measured to be as accurate as 6.5 cm.

A Ultrawide-Band VCSEL-Based Radar-Over-Fiber System

Serafino G.;
2019-01-01

Abstract

In this paper, an ultrawide-band (UWB) low-cost Radar-over-Fiber (RaoF) system is presented which exploits optical links based on directly modulated-VCSELs for radio frequency signal distribution from/to the base station to/from the transmitter/receiver front-end. The system, which includes packaging and engineering of the remote transmitter and receiver assemblies, has been tested in a controlled indoor environment using inexpensive patch antennas. Experimental results demonstrate that uncooled VCSELs allow direct modulation through 3 GHz-bandwidth UWB signals with carrier frequency of 7.5 GHz. The demonstrated system guarantees a power budget of 116 dB with a dynamic range of 66 dB, including signal pre-emphasis for in-band equalization compensating for the frequency response of both the packaged VCSEL-on-PCB and the patch antennas gain. The obtained results demonstrate the feasibility of such a low-cost solution for any scenario where remoting of transmitter and receiver up to a few kilometers is desirable together with a high resolution measured to be as accurate as 6.5 cm.
2019
978-1-7281-3625-7
Directly-Modulated Laser (DML)
Microwave photonics
Radar-over-Fiber (RaoF)
Radio-over-Fiber (RoF)
Vertical Cavity Surface-Emitting Laser (VCSEL)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12606/19778
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