TABLE OF CONTENTS

A transmit and receive system including up/down conversion system is designed in order to measure the Bit Error Rate (BER) of the system. The transmitter (up-converter) is designed at the radio frequency (RF) 2.4GHz. The front-end superheterodyne receiver (down-converter) is designed to accept the radio frequency from the transmitter and simulated in Advanced Design System (ADS). Harmonic Balance Simulation is performed to the system to obtain the conversion loss of the system, the minimum value of noise figure (NF), and the maximum values of gain. The down-converter is then fabricated on the FR4 type printed circuit board (PCB) for hardware testing and measurement for BER. The signal generator is used as a transmitter to transmit the signal to the receiver. The results of received signal are compare to transmit signal by connected it to the oscilloscope to view the waveforms. The waveforms data are saved for BER calculation at Microsoft Excel. The BER is measured by varies the power of the transmitter and the power of the local oscillator (LO). The minimum power levels that are just above the noise level are investigated