In this paper, a prototype of a dual-polarized array antenna is presented. This array was designed in the framework of a collaborative project on spatial modulation scheme. It will be used for the project testbed and for space-time channel measurements. This array includes several novelties such as a slant uniform planar structure, scalable design including integrated switching circuitry, along with a reference antenna and a camera. The array has been successfully used with a wideband channel sounder to provide real-time radio photos.