PolarPlot is a program for plotting a polar diagram of an antenna. If you are running an amateur radio station, you need to know the received and transmitting signal strength. For this you need to connect the audio output of the receiver (or transmitter), to the sound-card on your computer through its line-in socket. Once operated, the application will enable you to see the polar diagram of the rotatable beam of your antenna. If you have changed the design or location, then you can pick out of any abnormality by a comparison of the previous and present plots. You have an option of viewing the plot in a grid which is circular or rectangular, and scales which are linear or log. This program lets you know the working of your antenna, in a more detailed manner. You can compare and evaluate the patterns. Front to back ratio can be easily viewed as well as the sidelobes position and size. The plotting accuracy of the application will depend mainly upon the receiver's linearity, with or without AGC.