With the commercial proliferation of 5G technology, the global radio frequency front-end technology is undergoing unprecedented transformation. As a core component of the radio frequency front-end module, the filter has seen significant changes in both market structure and technical characteristics in the 5G era.

Jiang Xingyong points out that as systems evolve towards higher frequency bands, the design difficulty of filters has sharply increased. In high-frequency bands, filters not only need to achieve higher control precision but also must cope with complex bandwidth, delay, and linearization requirements. This shift poses more stringent challenges for filter design.

Firstly, the complexity of operating frequencies necessitates that filters address the issue of low-temperature drift. The performance stability of filters under extreme temperatures directly impacts the reliability of the entire system. Secondly, the complexity of application environments requires filters to effectively manage more signal interference within limited space, ensuring pure signal transmission. Lastly, coexistence filter technology has become crucial, ensuring that different types of signals can harmoniously coexist within limited frequency bands without interfering with each other.

In this context, the market structure for filters has also undergone profound changes. High-performance filters, such as BAW filters, are gradually becoming mainstream in the market due to their excellent performance in the mid-to-high frequency bands. At the same time, with the accelerated construction of 5G base stations, ceramic filters are progressively replacing traditional metal cavity filters as the preferred choice for base station filters because of their small size, lightweight, and superior performance.

Looking ahead, as 5G technology continues to evolve and gain widespread application, the filter market will welcome even broader development opportunities. Domestic manufacturers need to increase their investment in technological innovation and research and development to enhance the performance and quality of filter products to meet the growing market demand. Additionally, strengthening cooperation and communication with internationally advanced enterprises will be essential to jointly promote the healthy development of the global filter industry.