Acoustic Wave Filter Technology-A Review

被引：286
作者：
Ruppel, Clemens C. W. [1 ]
机构：
[1] EPCOS AG, Munich, Germany
来源：
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2017年 / 64卷 / 09期
关键词：
Acoustic filter; duplexer; film bulk acoustic resonator (FBAR)/bulk acoustic wave (BAW)/solidly mounted resonator (SMR) filter; intermediate frequency (IF) filter; multiplexer; radio frequency (RF) filter; surface acoustic wave (SAW) filter; FILM BAW RESONATORS; WIRELESS APPLICATIONS; HANDSET APPLICATIONS; CRYSTAL FILTERS; FBAR DUPLEXER; SAW; OPTIMIZATION; COEFFICIENT; DISPERSION; FREQUENCY;
D O I：
10.1109/TUFFC.2017.2690905
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Today, acoustic filters are the filter technology to meet the requirements with respect to performance dictated by the cellular phone standards and their form factor. Around two billion cellular phones are sold every year, and smart phones are of a very high percentage of approximately two-thirds. Smart phones require a very high number of filter functions ranging from the low double-digit range up to almost triple digit numbers in the near future. In the frequency range up to 1 GHz, surface acoustic wave (SAW) filters are almost exclusively employed, while in the higher frequency range, bulk acoustic wave (BAW) and SAW filters are competing for their shares. Prerequisites for the success of acoustic filters were the availability of high-quality substrates, advanced and highly reproducible fabrication technologies, optimum filter techniques, precise simulation software, and advanced design tools that allow the fast and efficient design according to customer specifications. This paper will try to focus on innovations leading to high volume applications of intermediate frequency (IF) and radio frequency (RF) acoustic filters, e.g., TV IF filters, IF filters for cellular phones, and SAW/BAW RF filters for the RF front-end of cellular phones.
引用
收藏
页码：1390 / 1400
页数：11
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