Novel phased-array antenna based on digital phase control electromagnetic surface

Abstract

The invention discloses a novel phased-array antenna based on a digital phase control electromagnetic surface. The novel phased-array antenna comprises a feed source and the digital phase control electromagnetic surface, the feed source is used for providing a space irradiation source for the digital phase control electromagnetic surface or receiving scattering electromagnetic waves of the digital phase control electromagnetic surface, and the feed source feeding mode is a reflecting type that the feed source is arranged in front of the digital phase control electromagnetic surface or a transmission type that the feed source is arranged behind the digital phase control electromagnetic surface. The digital phase control electromagnetic surface comprises a plurality of digital phase control radiation units, and each digital phase control radiation unit comprises a radiation module, a direct-current bias circuit and a digital control device integrated with the radiation module. The direct-current bias circuits are used for providing bias current for the radiation module. The radiation modules have different radiation phases under regulation and control of the digital control device. The novel phased-array antenna has the following advantages of being small in feeding loss, high in radiation efficiency, high in wave beam scanning speed, high in array scale extensibility, simple in structure, low in section, low in weight, easy to conform and low in cost.

Description

technical field [0001] The invention relates to the technical field of antenna design, and in particular relates to a novel phased array antenna based on a digital phased electromagnetic surface. Background technique [0002] Phased array antennas with high-gain beam scanning characteristics are widely used in satellite communications, remote sensing imaging, navigation guidance and other fields. The existing high-gain beam scanning antennas mainly include mechanical rotating parabolic antennas and electronically controlled phased array antennas. Among them, the rotating parabolic antenna has the advantages of simple structure, low cost, and high efficiency, but its shape is a special curved surface, bulky, heavy, and the beam scanning speed is slow, and the servo system requires high requirements. Electronically scanned phased array antenna can better overcome the above shortcomings. It not only has fast scanning speed and more flexible performance, but also has a planar o...

AI Technical Summary

Problems solved by technology

Electronically scanned phased array antenna can better overcome the above shortcomings. It not only has fast scanning speed and more flexible performance, but also has a planar or conformal structure that is more conducive to maintaining conformality with the carrier. However, the design of its feed network is complicated, especially when the antenna When the aperture increases, the feed loss is higher, the radiation efficiency of the antenna is lower, and the achievable gain is limited

Although the introduction of solid-state transceiver components in the unit can reduce the feed loss, the cost and weight of the system will be greatly increased, which limits the large-scale application of the existing phased array antenna

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