This article aims to the designing and simulation of a non-resonant slot antenna based on rectangular metal waves guides to operate in microwaves range. This device was assembled by introducing one slot near the center and the remaining slots on both. The main contribution of this article is the design and simulation of a non-resonant slot antenna based on wave guides to operate in the. Using the CST simulation. El presente artículo tiene como objetivo diseñar y simular una antena de ranuras no resonante basada en guías de onda metálicas rectangulares para operación. (CST Microwave Studio) was used to design the antenna. The overall objective of the proposal was to design and simulate a resonant slot antenna, based on metallic waveguides, for operation in the. The fundamentals of radiation associated with notch-type slot antennas, on which the work will focus, will also be reviewed. Abstract— This paper presents the design, simulation and construction of waveguide resonant slot antenna, for operation in the microwave range. . This project aims to design a non-resonant array for the simulation of an omnidirectional slot antenna with an operating frequency of Ghz.