Artificial electromagnetic structure material-based high-gain low-radar cross section planar antenna

Abstract

The invention provides an artificial electromagnetic structure material-based high-gain low-radar cross section planar antenna which comprises a micro-strip paster and a periodic artificial structural material with different echoing characteristics at the front side and the back side. The artificial structural material comprises a dielectric substrate, a periodic metal square ring structure manufactured on the front side of the substrate and a periodic opening gap metal plane structure manufactured on the back side of the substrate. Lumped resistance elements are loaded on the centers of four edges of the metal square ring structure on the front side. When electromagnetic waves enter from the front side of the artificial structure material, the energy of the electromagnetic waves is mainly absorbed; when the electromagnetic waves enter from the back side of the artificial structure material, the energy of the electromagnetic waves is mainly reflected. The artificial structure material is placed above the micro-strip paster to be used as a coating, the back side of the artificial structure material is used as partial reflection surfaces to form an F-P (Fabry-Perot) resonant cavity with a metal grounding plate of the micro-strip paster, and thus the radiation gain of the antenna is increased; and the incident waves can be absorbed from the front side, and thus the radar cross section of the antenna is reduced.

Description

technical field [0001] The invention relates to a high-gain, low-RCS panel antenna, in particular to a high-gain, low-RCS panel antenna based on artificial electromagnetic structure materials. Background technique [0002] As the radar cross section of the aircraft continues to decrease, the contribution of the airborne antenna system to the radar cross section of the flight system becomes increasingly prominent. Therefore, reducing the RCS of the antenna system has become an important factor in the target stealth system. Flat panel antennas (such as microstrip and F-P cavity antennas) have the advantages of light weight, low cost, and easy conformation, and are widely used in flight devices. Therefore, reducing the RCS of the panel antenna and increasing the gain of the panel antenna have attracted more and more attention and research of researchers. However, traditional radar absorbing materials and radar absorbing structures reduce the gain and directivity of the antenna...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the difficulty in realizing in-band reduction, narrow bandwidth reduction and the influence on the original antenna gain in the existing antenna RCS reduction technology; RCS panel antenna, this design scheme can not only improve the gain of the original antenna, but also greatly reduce the RCS in-band and out-of-band of the original antenna

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