Three-dimensional surface antenna for phase calibration

Abstract

The invention relates to a horn antenna, in particular to a three-dimensional surface antenna for phase calibration. The antenna comprises a vertical plated-through hole feeder (1), a horn antenna (2) and plated-through holes (3) which are integrated on a dielectric substrate (4), the dielectric substrate (4) is disposed on the top side of a three-dimensional package (5), one end of the vertical plated-through hole feeder (1) is connected with an internal circuit (8), the horn antenna (2) is composed of a bottom metal plane (6), a top metal plane (9) and plated-through hole side walls (11), through hole arrays (16) composed of the plated-through holes (3) form a plurality of dielectric-filled waveguides (17) in the horn antenna (2), and one port of each dielectric-filled waveguide (17) faces the direction of a short-path surface (15) of a narrow-section waveguide (13) while the other port of each dielectric-filled waveguide (17) is positioned on a horn antenna aperture surface (12). Besides, electromagnetic waves in the antenna can reach to the antenna aperture surface (12) by the same phase. The antenna is capable of improving antenna aperture efficiency as well as increasing antenna aperture gain.

Description

technical field [0001] The invention relates to a horn antenna, in particular to a phase-calibrated three-dimensional packaged surface antenna. Background technique [0002] Using micro-assembly technology, a radio frequency system can be integrated into a package, for which the antenna also needs to be integrated on the surface of the package. It is a natural way to integrate a patch antenna on the surface of the package, but the main radiation direction of the patch antenna is the normal direction of the surface, and the main radiation direction we sometimes need is along the surface direction. If the horn antenna is integrated on the surface of the package, the radiation along the surface direction can be realized. However, horn antennas are usually non-planar, incompatible with planar circuit technology, and have large geometric dimensions, which limits their application in packaging structures. In recent years, the substrate-integrated waveguide horn antenna developed...

AI Technical Summary

Problems solved by technology

However, the horn antenna is usually non-planar, incompatible with the planar circuit process, and has a large geometric size, which limits its application in the packaging structure

In recent years, the substrate-integrated waveguide horn antenna developed based on substrate-integrated waveguide technology has the characteristics of small size, light weight, and easy planar integration, but the gain of the traditional substrate-integrated waveguide horn antenna is relatively low. The reason is that the horn The continuous opening of the mouth causes the phase out of synchronization when the electromagnetic wave propagates to the horn's aperture surface, the phase distribution of the electric field intensity of the aperture is uneven, and the radiation directivity and gain decrease

At present, methods such as dielectric loading and dielectric prisms have been used to correct the asynchronous phase of the horn aperture surface, but these phase alignment structures increase the overall structural size of the antenna and are not suitable for integration into the package surface

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