Analysis of an internal mutual couplings influence on a radiation pattern of a nonresonant multislots waveguide array antenna

In this paper a design method of a nonresonant multislots waveguide array antenna is described. The internal mutual couplings between adjacent radiating slots are considered in the presented wave method. Additionally a correction stage including nonresonant slot lengths is introduced in design method in order to evaluate an internal mutual couplings influence on antenna radiation pattern. As an example a waveguide antenna with radiating slots cut across a narrow wall of an air rectangular waveguide is analyzed.