Due to the growing number of users, wireless communication has seen a considerable growth in data traffic exchange and the need for faster wireless networking in recent years. Within the next ten years, wireless data speeds are anticipated to reach 10 Gbps or more. With the spectrum’s currently licensed bands, such high data rates are unlikely to be realized. Thus, it is evident that using greater bandwidth with cutting-edge technology is the only way to attain such high speeds. Given its enormous bandwidth (up to 100 GHz), massive data throughput (up to 1 Tbps), low latency and ability to enable a vast number of applications across a wide range of domains, the Terahertz (THz) band (0.1-10 THz) is regarded as one of the most potential choices for next-generation wireless networks. THz antennas play a central role in realizing these capabilities, yet their design and deployment face numerous challenges. A significant advancement in wireless communication, particularly in the Internet of Things (IoT) sector, can be seen through the incorporation of THz technology into 6th generation (6G) systems. The THz spectrum is essential for applications including streaming high-definition (HD) video, IoT security systems, and medical equipment. An overview of the recent advancements in THz communications research and the aspects of THz antennas for upcoming wireless communication is presented in this article, including target applications, and significant research issues. The paper also examines the current difficulties encountered in the development and utilization of THz antennas alongside potential solutions. Finally, future research prospects in the field are described, emphasizing the necessity for energy-efficient architectures, advanced materials, machine learning-based channel modeling, and seamless integration with existing networks.