Abstract
In this paper, the design of an array in groove gap waveguide technology is developed. The basic element of the array is a leaky-wave antenna made in gap waveguide technology. The array is formed by stacking leaky-wave antennas one on top of the other. The design of the array consists on the investigation of the number of elements to be stacked, and the inter-element distance to avoid grating lobes and to obtain high directivity levels. The feeding of the array is done through the design of a vertical coupler. Phase shifters placed after the feeding network, ensure that all the elements radiate in-phase, aiming to achieve maximum directivity. The central frequency of the design is 28 GHz, and the array of four elements, achieves an enhancement of +5dB, reaching 24.5 dB of directivity, in comparison to 19.6 dB of directivity of the single leaky-wave antenna made in this technology. The proposed design was validated experimentally with a prototype.
Published Version
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