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Volume 12
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Communication

A 3.4–3.6 GHz High-Selectivity Filter Chip Based on Film Bulk Acoustic Resonator Technology

by
Qinghua Yang
1,
Yao Xu
2,
Yongle Wu
2,
Weimin Wang
1,* and
Zhiguo Lai
3
1
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
2
School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, China
3
Design Department, HunterSun Electronics Company Ltd., Suzhou 215000, China
*
Author to whom correspondence should be addressed.
Electronics 2023, 12(4), 1056; https://doi.org/10.3390/electronics12041056
Submission received: 13 January 2023 / Revised: 15 February 2023 / Accepted: 17 February 2023 / Published: 20 February 2023
(This article belongs to the Section Circuit and Signal Processing)
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Abstract

The development of mobile 5G technology poses new challenges for high-frequency and high-performance filters. However, current commercial acoustic wave filters mainly focus on 4G LTE, which operates below 3 GHz. It is necessary to accelerate research on high-frequency acoustic wave filters. A high-selectivity film bulk acoustic resonator (FBAR) filter chip for the 3.4–3.6 GHz range was designed and fabricated in this paper. The design procedure includes FBAR parameter fitting, filter schematic analysis, and the generation principle of transmission zeros (TZs). The measured results show that the filter chip is of high roll-off and stopband suppression. Most of the stopband suppression is better than 35 dB. Finally, error analysis was conducted, and FBAR parameters were modified after testing for future filter design work.
Keywords: radio frequency (RF) filter; mobile communication; film bulk acoustic resonator (FBAR); bulk wave filter (BAW); resonator model fitting radio frequency (RF) filter; mobile communication; film bulk acoustic resonator (FBAR); bulk wave filter (BAW); resonator model fitting

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MDPI and ACS Style

Yang, Q.; Xu, Y.; Wu, Y.; Wang, W.; Lai, Z. A 3.4–3.6 GHz High-Selectivity Filter Chip Based on Film Bulk Acoustic Resonator Technology. Electronics 2023, 12, 1056. https://doi.org/10.3390/electronics12041056

AMA Style

Yang Q, Xu Y, Wu Y, Wang W, Lai Z. A 3.4–3.6 GHz High-Selectivity Filter Chip Based on Film Bulk Acoustic Resonator Technology. Electronics. 2023; 12(4):1056. https://doi.org/10.3390/electronics12041056

Chicago/Turabian Style

Yang, Qinghua, Yao Xu, Yongle Wu, Weimin Wang, and Zhiguo Lai. 2023. "A 3.4–3.6 GHz High-Selectivity Filter Chip Based on Film Bulk Acoustic Resonator Technology" Electronics 12, no. 4: 1056. https://doi.org/10.3390/electronics12041056

APA Style

Yang, Q., Xu, Y., Wu, Y., Wang, W., & Lai, Z. (2023). A 3.4–3.6 GHz High-Selectivity Filter Chip Based on Film Bulk Acoustic Resonator Technology. Electronics, 12(4), 1056. https://doi.org/10.3390/electronics12041056

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