Same-side differential feeding substrate integrated waveguide slot antenna

Abstract

The invention discloses a same-side differential feeding substrate integrated waveguide slot antenna. The same-side differential feeding substrate integrated waveguide slot antenna comprises a substrate integrated waveguide cavity and a differential feeding transmission line, wherein the substrate integrated waveguide cavity comprises a metal through hole array, the differential feeding transmission line is used for connecting a differential circuit, two paths of transmission lines of the differential feeding transmission line are arranged at the same side of the substrate integrated waveguidecavity and are connected with the substrate integrated waveguide cavity by a transition structure, and a plurality of rectangular radiation gaps are formed in a top layer or a bottom layer of the substrate integrated waveguide cavity. On the basis that common-mode suppression of a traditional opposite-side differential feeding technology is inherited, the distance of an antenna differential pairis reduced to a great extent, the same-side differential feeding substrate integrated waveguide slot antenna is compact in integral structure and is suitable for direct integration with a differentialcircuit; and moreover, a higher-order mode is more easily simulated by the substrate integrated waveguide back cavity antenna, high-gain radiation characteristic is achieved, and the same-side differential feeding substrate integrated waveguide slot antenna has high application value in actual engineering application.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave antennas, in particular to a same-side differential feed type substrate integrated waveguide slot antenna. Background technique [0002] Differential circuits are widely used in communication systems due to their many advantages such as good common-mode noise rejection, high linearity and high dynamic range. In order to better integrate with differential circuits, scholars at home and abroad have proposed differential antennas in various forms. These differential antennas use differential pairs to directly feed without a balanced-unbalanced conversion structure, eliminating the need for on-chip or off-chip baluns, and realizing a fully differential architecture of the entire circuit from active to passive. Among them, the differentially fed substrate-integrated waveguide slot antenna has been widely studied and applied due to its low profile, small size, easy processing, and...

AI Technical Summary

Problems solved by technology

Therefore, the distance between the two ports is long, and additional conversion or transition structures need to be designed, which is not conducive to integration with differential circuits and brings certain losses and imbalances in the phase and amplitude of differential signals.

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