<p>Stealth technology has become predominant in modern technology, particularly in military applications. This study presents the development and analysis of 1-bit and 2-bit coding metamaterials for radar cross-section (RCS) reduction in the terahertz (THz) frequency band. Coding metamaterials effectively control electromagnetic (EM) waves in various dimensions, such as amplitude, phase, and polarization. In the 1-bit coding scheme, two distinct unit cells are used, whereas the 2-bit coding approach employs four unit cells. To optimize RCS reduction, five different coding sequences were proposed with four, eight, and twelve lattices per bit. The scattering values were numerically performed using Computer Simulation Technology (CST) software. Coding sequences Sequence 1, Sequence 2, and Sequence 3 demonstrated significant RCS reduction. A certain coding sequence exhibited RCS values as low as − 102.6 dBm². The proposed 1-bit and 2-bit coding metamaterials offer promising solutions for enhancing RCS reduction and advancing THz wave manipulation in various applications.</p>