## 1 Introduction  
The vigorous development of IoT technology has laid a solid foundation for continued growth in the 5G era [1, 2]. Therefore, networking, artificial intelligence, virtual reality (VR), and augmented reality (AR) technology can be used to provide relevant local 5G-centered services in health care, education, and other fields [3, 4]. The rise of 5G communications has initiated various IoT business model development. The driving factors that trigger IoT applications include the low cost of storing and computing data on cloud platforms. In addition, it also includes emerging edge computing trends, the decline in data, sensors, equipment costs, and the availability of mobile application development platforms [5]. Therefore, emerging technologies integrate intelligent roads, intelligent vehicles, and artificial intelligence into our lives [6]. Therefore, 5G technology still has a lot to be discussed and technical improvement, combined with other wireless communication technologies, and continues to improve wireless communication development in Beyond 5G (B5G). Large-scale low-latency internet of things and 5G private network services focus on the next generation of B5G/6G development. Therefore, the spectrum planning and telecommunication service mode of B5G satellite communications will be essential in the future. The use of low-orbit satellites is expected to supplement areas that ground base stations cannot cover and through 5G/B5G/emerging wireless communication, vertical application demonstrations, IoT devices, and scenarios are introduced to provide innovative applications [7, 8]. Furthermore, low-orbit satellite communication is also a key technology for future 6G commercial transformation. The development of 5G technology to 6G and satellite communications also includes the evolution of existing technologies and the development of emerging technologies for terrestrial communications, which will generate demand for spectrum planning [7; 9]. In addition, the rapid progress of telecommunications infrastructure will affect the future development of artificial intelligence and self-driving vehicles. The current internet of things devices must have a good match with wireless communication. However, the antenna design requires a design with multiple frequency bands and a large bandwidth is the same basic design principle. The main reason is that various wireless communication design standards must be accommodated in one device [10; 11; 12]. In recent literature discussion, antenna design is mostly compact multi-band antenna design as the main discussion topic. The superior design of coplanar waveguide (CPW) and slot line antenna (SL) can be used to achieve antenna design goals, including easy manufacturing and high compatibility with microwave circuits. In addition, using the CPW architecture design, CPW line segments with different widths and gap widths are used to achieve the ideal resonance frequency and massive bandwidth [13; 14; 15]. Multi-band antennas have integrated the applications of multiple wireless communication standards. It can be seen that the antenna design of IoT mobile devices with multi-band operation capabilities will be in great demand in the future market. Therefore, many design and development methods have been extended to multi-band antennas and integrated into various wireless communication product applications. However, the antenna design can be implemented in multiple frequency bands with antenna size minimization. Different generating frequency bands have been proposed in a single antenna, such as double L-slit, inductive slot [16; 17; 18; 19; 20; 21; 22; 23; 24; 25]. The design of IoT electronic products requires miniaturization and compact circuit design. Therefore, the antenna design space must be sacrificed. However, the antenna's effectiveness still needs to reach a certain level--no matter what kind of wireless communication product, finding any possible design practice is an important issue.