Low-radar-section slot array antenna based on holographic surface

Abstract

The invention discloses a low-radar-section slot array antenna based on a holographic surface. The defects that according to the conventional slot array antenna, the radar section is high, and the characteristics of radiation and scattering are hardly to be simultaneously provided are mainly overcome. The low-radar-section slot array antenna comprises the holographic surface (1), a holographic medium plate (2), a radiation floor (3), a radiation medium plate (4), a feeding network (5), a reflection medium plate (6), and a metal reflecting plate (7), the holographic surface (1) printed on the upper surface of the holographic medium plate (2) is formed by four square metal patches with different side lengths arranged in a periodic manner from the center and from the long to the short then to the long in a cycling manner, four rectangular slots (15) and rectangular through holes (21) are respectively arranged near central positions of the holographic surface (1) and the holographic medium plate (2), the positions of the rectangular through holes (21) correspond to the positions of the rectangular slots (15), the dimensions of the rectangular slots (15) and the rectangular through holes (21) are equal, and three medium plates are tightly bonded from top to bottom. According to the low-radar-section slot array antenna, the radiation characteristic is stable, the scattering characteristic is high, and the low-radar-section slot array antenna can be applied to the communication field with the requirement of scattering and radiation characteristics.

Description

Technical field [0001] The invention belongs to the field of antenna technology, and relates to a slot array slot antenna, in particular to a slot array antenna that uses a holographic surface to reduce the radar cross section, which can ensure that the antenna has good scattering characteristics while maintaining good radiation characteristics. For antennas that require both radiation characteristics and scattering characteristics, this technology is of great practical value. Background technique [0002] In the current communication field, the signal transmission and reception system is the most important part of the entire communication platform. The antenna is the core part of the system, and the radiation characteristics and scattering characteristics are the main indicators to measure the excellent performance of the antenna. The key to improving the scattering characteristics is to reduce the radar cross section, and the radar cross section is the most basic parameter in t...

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Problems solved by technology

Simone Genovesi published an article titled "Wideband Radar Cross Section Reduction of Slot Antennas Arrays" in IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION in 2014, which discloses a slot array antenna whose structure includes a radiation floor, a radiation medium plate, feed network, reflective medium plate and metal reflective plate; the radiant floor and feed network are printed on the upper and lower surfaces of the radiant medium plate respectively, and the metal reflective plate is printed on the lower surface of the reflective medium plate. The slot array antenna is closely bonded to the bottom; a 4×4 rectangular slot array is arranged on the radiating floor, and the row period and the column period of the array are equal; the radiating floor, the radiating medium plate, the reflecting medium plate and the metal reflecting plate are all A square with equal side lengths; this antenna has good radiation characteristics, but due to the large radiation floor in order to ensure the radiation characteristics of the antenna, the radar cross section of the antenna is very high and does not have good scattering characteristics

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