Bandwidth improvement with narrow wall slotted waveguide antenna

Radar is an important device for monitoring border security of Indonesia territory. The radar consists of several components, one of which is an antenna that works in the X-band. Usually, slot antennas are often used in navigation radar from an array fed by a waveguide. There are two types of slot placement positions on the slotted waveguide antenna i.e broad wall and narrow wall slotted waveguide antenna. This paper discusses a design and simulation of the addition the number of slots on narrow wall waveguide antenna at X-band 9.4 GHz. The simulation results showed that the increment of slots number will narrow the bandwidth. However, compared to the broad wall slotted waveguide antenna, a narrow wall slotted waveguide antenna yield a wider bandwidth in the same number of slots and slot width.