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Novel single-layer broadband circularly polarized reflective array antenna

A technology of reflectarray antenna and reflectarray, which is applied in the direction of antennas, antenna arrays, electrical components, etc., can solve the problems of not being able to realize circular polarization and meet application requirements, and achieve excellent performance, simple structure, and high axial ratio bandwidth. Effect

Pending Publication Date: 2022-07-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structures in the above papers can only achieve single linear polarization and cannot achieve circular polarization, which cannot meet the existing application requirements

Method used

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  • Novel single-layer broadband circularly polarized reflective array antenna
  • Novel single-layer broadband circularly polarized reflective array antenna
  • Novel single-layer broadband circularly polarized reflective array antenna

Examples

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Embodiment

[0040] This embodiment is based on a broadband circularly polarized reflective array antenna with a single-layer orthogonally placed embedded s-slotted rectangular unit, including a feeding horn 1 and a reflective array 2. The feeding horn 1 is located obliquely above the reflective array 2. The specific location That is: the feed horn 1 is located at a vertical height of 148 mm from the reflection array 2 , the included angle with the vertical direction is 25°, and is rotated 45° relative to the reflection array 2 . In this embodiment, the reflective array 2 has an aperture surface size of 207mm×207mm, and includes 529 reflective units 3; each reflective unit 3 includes a metal patch 4, a dielectric substrate 5 and a metal floor 6, and the metal patch 4 is printed on the The upper surface of the dielectric substrate 5 and the lower surface of the dielectric substrate 5 are connected to the metal floor 6 . Among them, the dielectric constant ε of the dielectric substrate 5 r ...

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Abstract

The invention discloses a broadband circularly polarized reflective array antenna based on a single-layer orthogonally placed embedded slotted rectangular unit structure. The circularly polarized antenna adopts a linearly polarized horn for feeding; the reflection array comprises a plurality of reflection units; each reflection unit comprises a metal patch, a dielectric substrate and a metal floor, the metal patch is printed on the upper surface of the dielectric substrate, and the lower surface of the dielectric substrate is connected with the metal floor; the metal patches are a pair of rectangular structures which are orthogonally placed and engraved with L-shaped grooves, and a certain width is reserved between the L-shaped grooves and the edges of the rectangular patches. The size of the rectangular patch of each reflection unit is not changed, and phase change and circular polarization are realized by changing the length of the L-shaped groove, so that the circular polarization reflection array antenna formed by the reflection units can realize high-gain bandwidth and axial ratio bandwidth, and the performance of the circular polarization reflection array antenna is superior to that of other circular polarization reflection array antennas.

Description

technical field [0001] The invention belongs to the field of reflection array antennas, in particular to a novel single-layer broadband circularly polarized reflection array antenna. Background technique [0002] Different communication systems have different requirements for the performance of antennas. With the increasing development of satellite communication, radar and other technologies, the demand for high-gain antennas is also increasing. Due to its advantages of small size and light weight, the planar reflector array antenna reduces the difficulty and cost of processing. At the same time, it adopts space feeding without complex feeding network, which reduces the loss of the antenna and improves the overall radiation efficiency. However, reflect array antennas have been limited by narrow bandwidths since they were proposed. In addition, circularly polarized antennas are widely used in satellite communications, deep space exploration and other fields due to their stro...

Claims

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Application Information

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IPC IPC(8): H01Q21/00H01Q15/14H01Q15/24
CPCH01Q21/00H01Q15/242H01Q15/14Y02D30/70
Inventor 郭璐周奇琪冯文杰
Owner NANJING UNIV OF SCI & TECH
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