Design Of Low Noise Amplifier For Radio Over Fiber Technology

Nur Syazana, Mohamed Sultan (2010) Design Of Low Noise Amplifier For Radio Over Fiber Technology. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Radio over Fiber (RoF) is integration of optical fiber for radio signal transmission within network infrastructures that is considered to be cost-effective, practical and relatively flexible system configuration for long-haul transport of millimetric frequency band wireless signals.This project is about to simulate the low noise amplifier in a Radio Access Point in Radio over Fiber technology. The lownoise amplifier (LNA) is a special type of electronic amplifier or amplifier used in communication systems to amplify very weak signals captured by an antenna. It is often located very close to the antenna, so that losses in the feedline become less critical. This active antenna arrangement is frequently used in microwave systems like GPS, because coaxial cable feedline is very lossy at microwave frequencies. The implementation of design is based on microstrip technology and Microwave Office software is used to perform the simulation of front end design. In the simulation, the analyses of scattering parameters are concerned which presents the gain and return loss of the front end. At the end of design, a low noise amplifier produced as a RF front end of RAP for RoF technology. The new designed low noise amplifier operates at 5.2GHz in the RF front end for the system of radio over fiber technology. The LNA designed function to amplify extremely low signals without adding noise, thus preserving the required Signal-to-Noise Ratio (SNR) of the system at extremely low power levels. At the end of this design, the result shows that the value of calculated noise figure and the simulated noise figure is similar to the simulation values, its 0.93678dB. Its shows that the input and output port network is matched perfectly and the biasing were completed.

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