This paper demonstrates that very low cost wireless-over-fibre systems can be implemented without RF amplification by using lossless matching techniques. Single stub matching circuits were designed on low loss substrates and integrated with photodiode chips and results show that the link gain can be theoretically improved by more than 8 dB. A 2-port link gain model is developed using Agilent ADS which allows simple wideband modeling of such systems. Finally the system is tested using a ldquoliverdquo access point both with and without matching and results show that a maximum RF range of 4 m can be obtained at 2 Mbps data rate over 317 m of installed MMF with no RF amplification.
Rose publication type: Journal article
Sponsorship: The authors would like to thank Prof. D. Bull of Provision Communications and P. Ferre for providing the throughput measurement codes, S. Shahin for help with the in-building fibre connections and J. Hooper and H. Glogowski for granting access
UoB WiFi access point and network.
V. Sittakul would like to acknowledge the Royal Thai Government Scholarship for Ph.D. funding.
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- radio-over-fibre, WLAN, vertical cavity surface emitting lasers (VCSELs)