Single-input port SIW feeding structure and antenna array

Abstract

The invention discloses a single-input port SIW feeding structure and an antenna array. The feeding structure comprises a TE10 mode SIW and a TE20 mode SIW, wherein the TE10 mode SIW comprises N levels of power dividing arms facing a first direction; the TE20 mode SIW comprises 2<N> TE20 mode SIW cavities; 2<N> first coupling gap couplings are formed between the TE10 mode SIW and the TE20 mode SIW; corresponding 2<N> groups of second coupling gaps are formed at the top parts of the 2<N> TE20 mode SIW cavities, and each group is formed by M pairs of second coupling gaps; the rear ends of 2<N> final-level power dividing arms are bent to a second direction, the 2<N> first coupling gaps are corresponding to 2<N> final-level power dividing arms and are also corresponding to the 2<N> TE20 mode SIW cavities; a horizontal distance of a half waveguide wavelength exists between the first coupling gap and the end part of the rear bending part of the corresponding final-level power dividing arm toprovide 2<N> paths of reverse phase signals; each path of reverse phase signals is fed to the corresponding TE20 mode SIW cavity and is then outputted through the corresponding M pairs of second coupling gaps, and a radiation unit array is excited to from an antenna array.

Description

technical field [0001] The invention relates to the communication field, in particular to an SIW feeding structure with a single input port and an antenna array. Background technique [0002] With the development of the millimeter-wave frequency band, research on high-performance millimeter-wave antenna arrays has received extensive attention. Differentially fed antennas have obvious advantages in suppressing spurious modes, reducing cross-polarization, and improving pattern symmetry performance. In existing reports, differential antennas are often fed by probes, microstrip lines, etc., but the exposed structure in this type of feeding method is likely to cause radiation leakage and reduce the radiation efficiency of the antenna. Moreover, this type of feeding method often brings layout difficulties due to the use of a large-volume differential power distribution network in antenna array design. The low-loss waveguide structure is more popular in the feed network of the mi...

AI Technical Summary

Problems solved by technology

In existing reports, differential antennas are often fed by probes, microstrip lines, etc., but the exposed structure in this type of feeding method is likely to cause radiation leakage and reduce the radiation efficiency of the antenna.

Moreover, this type of feeding method is often difficult to layout due to the use of large-volume differential power distribution networks in antenna array design.

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