Microstrip array antenna with reduced in-band radar scattering cross section

Abstract

The invention discloses a microstrip array antenna with reduced in-band radar scattering cross section. The antenna comprises an upper dielectric substrate, a middle dielectric substrate and a lower dielectric substrate, and the lower dielectric substrate comprises a radiation patch unit printed on the upper surface and a metal floor printed on the lower surface; phase regulation and control units are printed on the upper surfaces of the middle-layer dielectric substrate and the upper-layer dielectric substrate; the radiation patch units which are arranged periodically are connected through the feed network, and the feed network is connected with the metal floor through a coaxial line; the symmetrically distributed phase regulation and control units with different sizes are arranged according to a chessboard, correspond to the symmetrically distributed radiation patch units and generate reflection waves with the same reflection electric field amplitude and the phase difference of 180 degrees, so that the scattering characteristic of the antenna is realized. The antenna provided by the invention has a good radiation characteristic, and meanwhile, the in-band radar cross section is reduced to a great extent, namely, the scattering characteristic is improved. And the reduction of the in-band radar scattering cross section of the microstrip array antenna can be realized while the good radiation characteristic can be ensured.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a microstrip array antenna, in particular to a microstrip array antenna with reduced in-band radar scattering cross section. Background technique [0002] As a tool for sending and receiving signals, the antenna is the core part of the signal transmitting and receiving system in the communication field, and the radiation characteristics are the main indicators to measure the quality of the antenna. The key to improving the scattering characteristics is how to reduce the radar cross section, and the radar cross section is the most basic parameter in the scattering characteristics. It refers to a measure of the return power of a target in a given direction under the illumination of a plane wave. [0003] The antenna is a special kind of scatterer. Its scattering includes two parts: one part is the scattering field of the structural mode item that has nothing to do with the load of t...

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Problems solved by technology

Although the structural coating has a small impact on the radiation performance of the

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