Broadband reflective array antenna based on single-layer clip type unit structure

Abstract

The invention discloses a broadband reflective array antenna based on a single-layer clip type unit structure. The antenna comprises a pyramid horn antenna and a reflective array, the reflective array comprises a plurality of reflective units, and each reflective unit comprises a metal patch, a dielectric substrate and a metal grounding plate. The metal patch is printed on the upper surface of the dielectric substrate, the metal grounding plate is arranged at the bottom of the dielectric substrate, the metal patch is of a clip-shaped structure with an embedded inverted-L-shaped metal arm, and a certain width is reserved between the inverted-L-shaped metal arm and the inner edges at the two sides of the rectangular patch. According to the array antenna, the outer size of the rectangular patch of each reflection unit is kept unchanged, the phase of each reflection unit can linearly change by more than 360 degrees, the gain bandwidth and the aperture efficiency can be remarkably improved by the planar reflection array antenna formed by the reflection units, and the array antenna shows a stable and good radiation characteristic in a working frequency band.

Description

technical field [0001] The invention belongs to the technical field of reflective array antennas, in particular to a broadband reflective array antenna based on a single-layer paperclip unit structure. Background technique [0002] With the rapid development of technologies such as radar target detection, satellite remote communication, and deep space exploration, the role of high-gain antennas in the field of modern communication is becoming more and more important. Compared with traditional high-gain antennas, planar reflectarray antennas have very broad development prospects due to their simple structure and easy processing, no need to design complex feeding networks, and flexible wide-angle electronic beam scanning. However, there is a significant disadvantage of the planar reflectarray antenna, which is its narrow bandwidth characteristic. Therefore, how to widen the bandwidth of the planar reflectarray antenna has become a topic of great research value and development...

AI Technical Summary

Problems solved by technology

[0003] However, most of the current existing designs need to add an additional air layer to achieve a gentle phase change, which increases the volume of the reflector array.

At the same time, in order to achieve reflection phase compensation within a 360° phase change period, there may be a size change between adjacent array elements

Since periodic boundary conditions are used in the unit simulation, the size of the surrounding unit structures is the same by default. This sudden change in size will cause errors in the unit phase compensation value, thereby affecting the pe

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