Tetrahertz and sub-terahertz frequency bands must be used to handle 10Gbits/s of data for sixth-generation (6G) wireless networks to work. For example, in dynamic mobile settings, these high-frequency bands are easily stopped because the air absorbs them very well. Thus, inactive mirrors and static antennas are unable to assist the messages in getting where they need to go. To get around this basic issue, this study provides a formal engineering framework for electromagnetic metamaterials that can be altered and can be utilized as a physical control layer that can be altered. Active unit-cell designs that can make dynamic surface resistance are part of our job. To support this, we use full-wave electromagnetic simulators and similar circuit models. In this study, each way of tuning is carefully looked at. Finding the best balance between phase tuning range, insertion loss, and switching delay is done by comparing electronic varactor biasing and material phase-change methods. This article demonstrates that these bendable surfaces bridge the gap between the physics of the device and the performance of the whole system. This allows us to exactly shape the wavefront for tasks such as real-time beam steering and hologram focusing. The results look into how electromagnetic control affects the network's dependability. In difficult non-line-of-sight situations, they show that the signal-to-interference-plus-noise ratio and coverage chance get a lot better. Metamaterials that are intended to be active are not just extra bits, as these results show; they are important structures to make sure that 6G transmission is stable, scalable, and energy-efficient.................. Keywords:..............Metamaterials; 6G communications; tunable electromagnetic surfaces; THz propagation; intelligent reflecting surfaces.