Design, optimization and simulation of non-resonant slotted waveguide antenna for X-band

Abstract

The main aim of the project is to design the antenna which provide maximum gain and coverage for military applications. This paper presents the design, optimization and simulation of non-resonant slotted waveguide antenna with optimized side lobe levels in X-band region. It is very compact and easy to handle. The proposed antenna has simple feed system to avoid the complexity in case of resonant or standing wave slotted waveguide antenna. A single travelling or non- resonant antenna consists of 64 slots or radiating elements. Instead of using many small antennas, a single antenna with many slots is used. Taylor’s aperture distribution is used to achieve an ultralow side lobe level (SLL) of -25dB. Based on previous works carried on slotted waveguide antenna it is seen that by choosing the proper place on waveguide and by choosing specified shape, size, orientation and position of slots on the waveguide, the radiation and realized gains can be varied. By keeping this as the main agenda we have designed antenna by starting with simple 1 slot waveguide to till 64 slot waveguide and considered 5 different cases to obtain the optimized design and results. Results for all the 5 different cases considering a simple 1 slot waveguide to till 64 slots waveguide are clearly presented in this paper and observed to reach an optimized level.