Design, analysis and simualtion of a C band frequency scanning slot-array antenna

A frequency scanning waveguide slot-array antenna has been designed and simulated. The antenna has 24 radiating elements and has been designed to work in the 6.6-6.9GHz frequency band. The slot width is taken about 4mm and for the convenience of the mechanical fabrication of the antenna, the dumbbell shaped slots has been used. The beam width of the antenna is about 5-6 degrees. The main lobe direction is about 90 degrees at the start of the frequency band namely 6.6GHz and the main lobe rotates about 5 degrees for every 50MHz change in the input frequency. The software CST Microwave Studio has been used to simulate the behavior of the antenna. The antenna has a simple mechanical structure which leads to a simple fabrication process.