Abstract: The results of an actual X-band rectangular waveguide phase controlled antenna array are given. Using the antenna array as boundary values of electro-magnetic field, a solution of the field equations is made, and an integral equation of the tangential electric feild function of an unknown aperture is established. Through conversion to matrix methods, numerical results are obtained by using the DJS-6 computer. A sourceless small array containing 115 elements was made. The directional diagram of the array element wasmeasured. Also two magnetic H face waveguide simulators: HIC 14 and HIC 29 were made, and experimental tests were performed. The parameters of the wide angled matching dielectric plate and the mateching foil over the aperture were determined by theoretical calculations and experimental results are quite close to each other. On the 8600--9600 MHz band and 60 scanning spherical cone; the VSWR of input voltage on the antenna is less than 2.