Broadband semi-elliptical slot antenna array in millimeter wave antenna level packaging and design method

Abstract

The invention discloses a broadband coplanar waveguide semi-elliptical slot antenna array structure in millimeter wave antenna level packaging, relates to the technical field of antenna arrays, and solves the problem of how to design an antenna array which is large in array bandwidth, high in gain, easy to integrate and suitable for a narrow, long and straight scene. The antenna comprises an antenna array radiation assembly, an antenna array feed assembly and a GCPW-to-CPW transition structure. The antenna array feed assembly excites a corresponding antenna unit through a GCPW-to-CPW transition structure and a rectangular CPW feed line. The antenna unit comprises an etched semi-elliptical gap of a first metal grounding plate on the upper surface of a microwave dielectric substrate and an open-circuit fan-shaped branch knot. The semi-elliptical gap is a gap etched by the fan-shaped outer edge of the fan-shaped branch knot and the first metal grounding plate; the distance between the midpoint of the chord corresponding to the fan-shaped arc of the open-circuit fan-shaped branch knot and the surrounding first metal grounding plate is gradually changed according to a semi-ellipse, andcompared with a traditional circular and elliptical slot structure, the slot width is reduced, the array radiation effect is improved, and the array bandwidth and gain are larger.

Description

technical field [0001] The invention belongs to the technical field of antenna arrays in millimeter-wave communication and detection antenna-level packaging systems, and specifically relates to a wide-band semi-elliptical slot antenna array in millimeter-wave antenna-level packaging and a design method. Background technique [0002] With the rapid development of global communication services, wireless mobile communication technology, which is the main means of personal communication in the future, has attracted great attention. In the entire wireless communication system, the antenna is a key device for converting radio frequency signals into wireless signals. Its excellent performance plays an important role in the success or failure of wireless communication projects. At present, in the field of antennas, new antennas such as millimeter-wave broadband antennas have attracted much attention due to their advantages such as high transmission rate, large system capacity, stron...

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Problems solved by technology

[0005] In the prior art, Horng-Dean Chen proposed a square slot antenna structure with wide impedance branches, which increased the relative bandwidth of the antenna to more than 60%. F.Muge designed a 1×4 antenna array based on his research. However, the coupling between unit slots reduces the array bandwidth and gain; scholars such as Evangelos S. have proposed wide-band slot antennas with circular and elliptical slot structures and wide impedance branches, but their large size hinders high-performance and miniaturized array design; Traditional slot antennas cannot achieve a good array effect alone. Some miniaturized slot antenna arrays have low gain due to mutual coupling between array elements. Some slot antenna arrays with better gain have a narrow operating bandwidth and cannot adapt to Broadband requirements cannot meet the requirements of bi-directional slot antenna arrays in antenna-level packaging systems with wideband and high gain for narrow, long, and straight scenarios

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