A low RCS microstrip antenna based on a composite technology of slotting and loading split‐rings

Abstract

This study proposes a method to reduce the wideband radar cross-section (RCS) of a microstrip antenna while maintaining its dimensions. Modifications to the design of the antenna consist of patch slotting, ground slotting, and coplanar split-ring loading without changing its size. The results of simulations show that a significant reduction in the RCS can be obtained in the range of frequency of 1-3 GHz. The maximum in-band RCS and out-of-band RCS are 20.8 and 38 dB, respectively. Prototypes of the reference antenna and the proposed composite antenna are manufactured and tested, and the results are consistent with those of the simulation.

Wideband radar cross section reduction of a circularly polarized antenna using polarization conversion metasurfaces

“…Therefore, designing an antenna with low RCS is greatly emphasized for some defense applications. Varieties of techniques have been demonstrated to design low RCS antenna that includes metamaterials, 6–8 loading PIN diodes, 9 frequency selective reflector 10 characteristic mode analysis, 11 shaping methods, 12 and so on. A well‐known method is the shaping of an antenna 12 to deflect the EM energy and also using radar absorbing materials (RAMs) that convert the incoming energy into heat 13 .…”