Understanding RF Filters [Reading Notes on Qorvo RF Books]

andy11112

Understanding RF Filters [Reading Notes on Qorvo RF Books] [Copy link]

After a quick reading of "RF Filter Technology for Dummies" and "RF Filter Application for Dummies", I have some thoughts: 1. Filters have become an increasingly important component in RF applications. Their basic function is to allow useful frequency band signals to pass through while blocking useless frequency band signals. Attenuation and cutoff frequency are important considerations. 2. In simple RF applications, the frequency band is single, or the frequency bands are far apart. Simple basic components (capacitors and inductors) can build filters that meet expectations. As the functions of products expand, communication frequency bands continue to expand, and the isolation between them is also getting smaller. Simple filters cannot meet the requirements, and must rely on integrated, high-performance filters (such as Qorvo filters), including surface acoustic wave and bulk acoustic wave filters. In addition, as products become smaller and smaller, the heat generation also increases dramatically. Qorvo low-temperature tickets and zero temperature drift filters are also the preferred choice to ensure filtering performance. 3. Circuit designers like to use filters with excellent performance, but there is generally a certain conflict between price and performance. However, the CuFlip technology mentioned in it can effectively reduce materials, reduce processes, and improve output. I wonder if this technology will alleviate some conflicts between performance and price? 4. As product integration becomes higher and higher, and communication frequency bands become more and more, it is no longer possible to build circuits using only capacitors and inductors. Currently, it is necessary to rely on high-performance integrated components (filters, multiplexers, etc.) to achieve design. High-performance components are greatly simplifying and facilitating the work of system designers. We have to think about whether subsequent system designers can design like building blocks, as the performance and function integration of filters, multiplexers, amplifiers, and even chips fully simplifies peripheral circuits?

gmchen

Can system designers design like building blocks? There is already such a trend. Many hardware engineers of complete machine manufacturers just take the scheme of integrated circuit manufacturers and make a printed board. I estimate that in the future, a large number of senior engineers will flow to integrated circuit companies. Perhaps software engineers will continue to develop with the development of software radio.

chuchuda

It is impossible for videos with high frequency, but it also depends on how to divide them.