Abstract: This project will combine a recently proposed three-dimensional near-field holography and the theory related to the open-circuit voltage. The combined theory will be suitable for a high gain antenna to work for the three-dimensional near-field holography. The three-dimensional near-field holography which we cited is much different from the conventional one which deals with the electromagnetic waves like the acoustic waves and only solves the equations based on the scalar wave problem. Therefore, some electromagnetic interactions with matter are ignored, and it’s also not well-suited for the near-field application. The holography we cited is based on the fundamental equation of the electromagnetic scattering problem. It means that the electromagnetic scattering phenomenon is considered more exactly, and hence the image quality is improved in three-dimensional near-field imaging. Also, it still retains the advantage of holography, i.e., fast and simple. However, this technique still has some disadvantages that are two probes scheme and unsuitable for high gain probe antenna. The motivation for this project is to correct these disadvantages. First, this project will begin with single probe scheme and a high gain probe antenna due to simplification of the system and improvement of the signal to noise ratio. To develop a corresponding theory, we apply the open-circuit voltage of the receiving antenna which could fully describe the characteristic of the antenna. Then we solve the integral equation as the cited paper mentioned and deal with some other accompanied numerical problem. The simulation results in the initial step are great, and further experimental test should be implemented in the future. This project is expected to accomplish the theory of three-dimensional near-field holography for high gain probe antenna and the setup of the measurement system.