The Waveguide Antenna is a directional antenna designed to use in RF and microwave systems. It has hollow metal waveguide designed for propagating electromagnetic waves at a particular frequency. It operates based on the theory of waveguide modes. It can be utilized in varied applications, comprising satellite communication, radar systems, and radio astronomy. Plus, it is the best suitable for usages that need high gain as well as directional control, like in antenna arrays. In addition, the presented Waveguide Antenna can also be utilized in array configurations for achieving even higher gain and directional control as well.