Approximate Antenna Radiation Pattern Determination Using a Low Cost Measuring System at 2.4 GHz

This paper presents a cost-effective and friendly interfaced system to acquire radiation patterns of antennas in GHz frequencies for academic purposes. National Instruments' USRP 2921 and Arduino are used to accomplish the radio readings and step motor control, respectively. Criteria used for trials is that if the scenario is large and far away enough from external radio sources, reflections and interference are negligible. Results show good resolution despite not using an anechoic chamber. For this project, the signal to noise ratio (SNR)is used instead of the received power to plot the charts.