Broadband planar array antenna fed by substrate integrated waveguide

Abstract

The invention discloses a broadband planar array antenna fed by a substrate integrated waveguide, which mainly solves a problem that the existing antenna is narrow in bandwidth, not compact in structure and large in loss. The antenna is composed of N transversely distributed linear array antennas and a transversely arrayed feed network, wherein each linear array antenna includes a radiating body and a linear feed network, the radiating body is composed of a top metal layer 1, an upper dielectric substrate 2 and a metal connector 3, and the top metal layer is located on the upper surface of theupper dielectric substrate; the liner feed network includes an upper ground plate 4, a lower ground plate 5 and a signal transmission channel 6, the upper ground plate is located on the upper surfaceof the signal transmission channel and connected with the top metal layer through the metal connector, and the lower ground plate is located on the lower surface of the signal transmission channel. The broadband planar array antenna adopts the radiating body similar to a magnetoelectric dipole structure and a substrate integrated waveguide feed mode, thereby improving the working bandwidth, reducing the loss, being compact in structure and being capable of applied to a 5G communication and radar system.

Description

technical field [0001] The invention belongs to the technical field of antennas, and further relates to a broadband planar array antenna, which can be used in 5G communication and radar systems. Background technique [0002] With the progress of society and the development of technology, the demand for high performance and miniaturization of the antenna system is increasingly urgent. Array antennas are widely used in electronic systems in many fields such as communication, navigation, radar, and detection, and can achieve high performance. The miniaturized array antenna structure will inevitably bring good economic and social benefits. [0003] Although the traditional microstrip planar array antenna has the advantages of low profile and high gain, as the frequency increases, the efficiency of the antenna decreases due to the increase in the conductor loss, surface wave loss and dielectric loss of the microstrip line itself; the waveguide array antenna The power capacity is...

AI Technical Summary

Problems solved by technology

However, the traditional substrate-integrated waveguide array antenna has narrow bandwidth and large size. Therefore, the broadband and miniaturized substrate-integrated waveguide array antenna has become a hot research topic at present.

[0005] Tomas Mikulasek's published paper "2x2 Microstrip Patch Antenna Array Fed by Substrate Integrated Waveguide for Radar Applications" proposes a substrate-integrated waveguide-fed 2x2 microstrip patch planar array antenna. Electricity and gap coupling energy to the radiation patch, its disadvantages are: the relative bandwidth is only 10%, and the volume is large, which is not conducive to the integration with peripheral circuits

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