Research On Control Methods Of Antenna Radar Cross Section

With the rapid development of the electronic technologies in the military field, the stealth technology of sensitive targets has attracted more and more attention. In order to avoid the detection by the radar, it has great significance and a wide range of application to reduce radar cross section(RCS) of military targets including naval ships and airborne vehicles. As a core part of communication systems, antennas are the dominant scatterers of military platforms, due to their own characteristic to effectively receive and radiate electromagnetic wave. In other words, it is a meaningful task to study RCS reduction of antennas. Under the premise of acceptable effect on radiation performance of antennas, four different methods have been proposed to reduce RCS of antennas in this thesis. Antennas with remarkable radiation features and low RCS are achieved based on the analysis of theory, the design of geometry, the optimization of parameters and the analysis of results. Consequently, the validity of our strategies to reduce antenna RCS has been verified.1. A dual-frequency microstrip patch antenna with low RCS is proposed by utilizing the pass-band complementary split-ring resonator.2. By loading the stop-band frequency selective surface and microstrip resonators, the RCS of the microstrip patch antenna is reduced in a wide frequency band.3. In-band and out-of-band RCS reduction of a microstrip patch antenna, which is covered by polarization conversion metamaterial, is obtained due to the principle of passive cancellation.4. Based on the feature of the holographic metasurface to control the propagating waves, wideband RCS reduction of the slot array antenna is achieved.