Coaxial feeding millimeter wave antenna based on thick and thin strip line conversion

Abstract

The invention proposes a coaxial feeding millimeter wave antenna based on thick and thin strip line conversion. The coaxial feeding millimeter wave antenna sequentially comprises a coaxial connector,a thick substrate strip line, a thin substrate strip line and a thin substrate strip line antenna from back to front, wherein the thick substrate strip line is formed by crimping four layers of substrates, and sequentially comprises the first layer substrate, the second layer substrate, the third layer substrate and the fourth layer substrate from bottom to top; the thin substrate strip line is formed by the second layer substrate, and the thin substrate strip line antenna is formed by the third layer substrate; a wide transmission line of the thick substrate strip line is positioned on the upper surface of the second layer substrate; a narrow transmission line of the thin substrate strip line is positioned on the upper surface of the second layer substrate; and side edges of the first layer substrate and the fourth layer substrate are provided with metal cladding. The coaxial feeding millimeter wave antenna solves the difficulty that a millimeter thin substrate strip line antenna feeding structure cannot be implemented by engineering or the performance thereof is about to be seriously deteriorated during the implementation process.

Description

technical field [0001] The invention relates to a coaxial feeding millimeter-wave antenna based on thick-thin stripline conversion, in particular to a coaxial feeding thick-thin stripline conversion structure. Background technique [0002] Microstrip antennas have been widely used in radar and communication fields due to their advantages of small size, light weight, low profile, and conformability. The transmission lines of microstrip antennas usually have the following types: microstrip lines, striplines, and coplanar waveguides. The stripline is a layer of printed transmission lines crimped in the middle of two substrates. Due to its closed structure, compared with the microstrip line, it can reduce mutual coupling and have smaller radiation loss. The coaxial connector is a commonly used feeding method for microstrip antennas. For microstrip antennas with a stripline structure, the commonly used coaxial feeding methods are as follows: The coaxial probe is lapped to the pr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a coaxial feeding millimeter-wave antenna based on thick-thin stripline conversion, which solves the problem that the feeding structure of millimeter-thin substrate stripline antenna cannot be realized or its performance will be seriously deteriorated during the realization process problem

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