Reflectarray radiating element and flat-panel reflectarray antenna

Abstract

The invention discloses a reflection array radiation unit, which belongs to the technical field of antennas. It includes a dielectric substrate and a metal pattern layer printed on one side of the dielectric substrate; the metal pattern layer adopts a multi-ring nested structure, including multiple phase factor adjustment rings and several phase compensation rings located on the periphery of the phase factor adjustment ring. The single-layer printing structure reduces the process difficulty of multi-layer printing technology, reduces the dielectric loss and reduces the processing cost. Compared with the traditional unit, its phase compensation ability is increased by 4-6 times, and the traditional reflection array The focal-diameter ratio is reduced to 0.5 or even lower; the structural size of each reflectarray unit can be optimized in the entire working frequency band, so that its phase can be compensated on demand, thereby expanding the gain bandwidth of the reflectarray antenna. The invention also discloses a planar reflectarray antenna composed of the above-mentioned reflectarray radiating unit.

Description

technical field [0001] The invention relates to a radiating unit for a microstrip reflective antenna, specifically a reflective array radiating unit and a flat plate reflective array antenna, belonging to the technical field of antennas. Background technique [0002] The reflectarray antenna uses the phase shift characteristics of the planar element to compensate the phase difference caused by the path difference between the incident wave from the feed source and the equal phase plane, thereby forming a focused beam perpendicular to the equal phase plane, which is different from the traditional reflector Compared with antennas, its compact structure is more suitable for space-constrained occasions such as portable satellite communication antennas. However, the current traditional reflectarray antenna has many shortcomings such as narrow frequency band and low aperture efficiency. [0003] In order to break through the deficiencies of traditional reflectarray antennas, in ad...

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Problems solved by technology

The former increases the focal-diameter ratio of the antenna, that is, increases the focal length of the feed or reduces the aperture of the front, but this method may increase the space occupied by the antenna due to the use of telephoto or limit the gain due to the small aperture, which affects the communication effect; The latter usually adopts a delay line or a multi-layer structure. The delay line is not only limited by the unit size but also increases the loss as the length of the delay line increases. The multi-layer structure not only increases the loss, but also increases the complexity of the structure. degree and manufacturing cost

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