Heterogeneous conformal low-RCS airborne radome

Abstract

The invention discloses a heterogeneous conformal low-RCS airborne radome, and relates to the technical field of radar stealth. One technical scheme of the invention is realized as follows: a non-wave-transparent area on the outer side of a central wave-transparent area of the skin outer cover (1) is conformal with the aircraft outer skin to form the wave-transparent rhombic covering cap integrated with the heterogeneous curved surface together; a central wave-transparent area of the wave-transparent rhombic covering cap is a wave-transparent layer made of an S glass fiber composite epoxy resin composite material; a non-wave-transparent area on the outer side of the wave-transparent layer is a non-wave-transparent layer made of carbon fiber composite epoxy resin materials, the wave-transparent layer is connected with the non-wave-transparent layer in a seamless coplanar mode, a metal rhombus transition ring (2) is formed, the upper portion of the metal rhombus transition ring is connected with a skin outer cover, and the lower portion of the metal rhombus transition ring is connected with an array antenna body. The wave-transparent area and the non-wave-transparent area cover the conformal antenna cover assembly of the array antenna body together. According to the invention, the problem of thermal expansion and cold contraction between dissimilar materials of the heterogeneousradome is solved. The radome is conformal with an aircraft outer skin, low in RCS, simple in structure and capable of being used as an antenna.

Description

technical field [0001] The invention relates to the technical field of low radar cross-section (RCS) radar stealth, in particular to a heterogeneous heterogeneous conformal low RCS airborne radome. Background technique [0002] The antenna is an electromagnetic field radiator. While reducing its RCS, it must also ensure the radiation characteristics of the antenna. This is also a pair of contradictions, and a compromise solution is required. Due to the above characteristics, the above-mentioned two methods of shape stealth technology and wave-absorbing material technology cannot be used for the reduction of the RCS of the antenna. However, the radar cross section generated by the antenna cannot be ignored. From the point of view of rays, the scattered field includes the reflection on the surface of the object due to the sudden change of the medium wave impedance, and the diffraction caused by the discontinuity of the surface of the object such as the edge and the spire. Fr...

AI Technical Summary

Problems solved by technology

Due to the inconsistency of the thermal expansion coefficients of the two materials, stress will be generated at the junction due to the influence of temperature. If the stress is too high, the outer absorbing material or paint layer will be torn and cracks will be formed, which will affect the appearance and environmental protection ability.

Images