The demand for safety in automobiles in recent years has increased in a significant way. One of the most important safety features is that of radar systems, which detect obstacles and other vehicles in proximity. Radar antennas can be classified into two main categories: printed radar antennas and 3D waveguide antennas. Both these types of antennas have their own unique characteristics and are used in different applications. Printed antennas, also known as planar antennas, are typically flat and have a simple, two-dimensional structure. They are often used in radar systems because they are relatively inexpensive and easy to manufacture. 3D antennas, on the other hand, have a more complex, three-dimensional structure and can have a variety of shapes.