Abstract

Amateur Radio operators need a way to check how well their signal is being transferred and how well incoming signals are being received. Without a good wattmeter, the operater has no idea if the maximum power is being transferred. The operator also needs to know the ratio of forward to reflected power or Standing Wave Ratio. The team will design a Radio Frequency Power/Standing Wave Ratio Wattmeter to check how well the power is transferred between the transmitter and the load. It will operate within the frequency range of 1.8 to 30 MHz. This module will use a bidirectional coupler sensor to separate the forward and reflected power by seperately sampling either the forward or reflected wave. This allows the precise monitoring of the RF energy flow in the line. The device will display the peak and average forward or reflected power on one analog meter and the SWR on a second analog meter. A Liquid Crystal Display will show the forward and reflected power, SWR, and a bargraph. The module will feature auto range operation, support switching between two sensors, and there will also be a high SWR indicator.