Study on calibration of the array antenna using a Web camera

Recently, the direction-of-arrival (DOA) estimation using an array antenna has been studied extensively. Accordingly, array calibration method has also become an important topic. Conventional data acquisition methods often require a positioner or an azimuth table to make sources of known DOAs for pre-measurement of array calibration in a radio anechoic chamber. However, such a measurement is both time-consuming and expensive. In this paper, we propose a simple data acquisition method for array calibration using a Web camera and show its effectiveness by experiments. Additionally, we also report a simulation study to confirm the relationship between the distance from transmitter (Tx) to receiver (Rx) and the array length.