Brief introduction of acoustic filter Market

The filter can be simplified as a capacitor 、 inductance 、 A circuit consisting of resistors , It is a frequency selection device that can make a certain frequency component or a section of frequency in the signal pass , At the same time, other frequency components are greatly weakened . Using this selectivity of the filter , You can filter out the noise and analyze the spectrum . This is the core function of mobile communication products . As far as mobile phones are concerned , In recent years, from the popular iphone4 Up to now, Huawei mate series , It can be said that mobile phone technology is developing rapidly , Its communication technology is also gradually updated . Because the low frequency band has been occupied , The communication frequency band is rising , As a result, the signal penetration ability is getting lower and lower , The number of base stations needs more . The base stations to be built in China in the past five years are 200 ten thousand , There are more base stations under construction all over the world 800 Wan Zhi Du . Suppose we calculate according to the minimum standard , Single standard 5G The base station needs to be equipped with three pairs 64TR The antenna is guaranteed to work , Single 64TR Yes 64 A filter , That is to say, a base station needs 192 A filter to complete the work , Calculate how huge the global demand is . From the mobile communication equipment market ,2020 In, the global production of smart phones has reached 11.5 Billion parts , among 5G Smartphones occupy nearly 1/3. For smart phones , The changing history of communication technology is also the process of the continuous number of frequency bands , from 2G In the era of 4 Frequency band ,3G In the era of 6 Frequency band , To 4G Thousand yuan machine 8-20 Frequency band ,4G High end machine 17-30 Frequency band , Now 5G Mobile phone 50+ Frequency band . Every frequency band needs a filter to ensure the cleanness and stability of the signal , The increase of frequency band is directly proportional to the market demand of filter , Therefore, whether for the international or Chinese market , The demand for filters is growing . Look at it from another angle , Standing on the mobile phone 、 The filter supply end used in the Internet of things , We can look at it from the perspective of industrial chain , Industries are divided into upstream and downstream , That is to say EDA Software and material manufacturers 、 Filter design, manufacturing and packaging manufacturers 、 Three sectors of communication terminal manufacturers , A fact that cannot be ignored is that China is EDA Software and materials are very backward . In terms of market sales ,EDA The market is basically American Cadence、Synopsys Company and acquired by Siemens Mentor Graphics The monopoly of the company , Its total share is 96%, The total share of Chinese companies is insufficient 1%. about FBAR For the core material piezoelectric crystal Market , Japanese manufacturers ride the dust , Among them, Xinyue chemical 、 The export products of several Japanese enterprises, such as Sumitomo Metal Industry, occupy the global market 95%, China's total production capacity is only 1%. But Chinese enterprises are also trying to improve this situation , China's Deqing Huaying 、 CLP 26 the 、 Enterprises such as Xinwei communication and Tiantong are also mobilizing funds to invest in this business , But the current production capacity is really insufficient . From the data , China's smartphone shipments account for% of the total global shipments 25%, Is a very high value , However, as an important part of communication products, the self-sufficiency rate of filters is less than 5%, The gap is very large , It also shows that the overall level of filter technology in China is inferior to that of international giants . Now is the time to need a large number of filter talents , But just in time for Sino US friction , More talents are needed to understand this industry , Country 、 Colleges and universities 、 Research institutes also need to pay more attention FBAR The development of .