Design of Bulk Acoustic Wave Filters for Beidou Receiver

2014 ◽  
Vol 24 (02) ◽  
pp. 1550018
Author(s):  
Tingting Lu ◽  
Shuai Wang ◽  
Hao Zhang ◽  
Lingwei Xu ◽  
T. Aaron Gulliver
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Acoustic Resonator ◽  
Bulk Acoustic Wave ◽  
Design System ◽  
Physical Parameters ◽  
Pass Band ◽  
Film Bulk ◽  
Wave Filters ◽  
Baw Filter

Based on the thin-film bulk acoustic resonator (FBAR) technology, a new narrow-band bulk acoustic wave (BAW) filter for Beidou B1 band receiver is designed. The aluminum nitride thin film is used as a piezoelectric layer. The Mason model of air-gap TFBAR (AGR) resonators is established in advanced design system to investigate the relationship between electrical impedance and physical parameters. The simulation results illustrate the effect of the area of parallel unit and the number of resonators on the performance of the BAW filters. By changing the series-parallel unit series and area ratio, the pass band of the BAW filter can reach 1556–1566 MHz, and the out-of-band rejection and the insertion loss can reach 47.5 dB and 3.0 dB, respectively.

Thin film bulk acoustic wave filters with ring-dot electrodes

2018 ◽  
Vol 19 (10) ◽  
pp. 786-795 ◽  
Author(s):  
Jing Liu ◽  
Jian-ke Du ◽  
Ji Wang ◽  
Jia-shi Yang
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Bulk Acoustic Wave ◽  
Film Bulk ◽  
Wave Filters

Fabrication of single crystalline LiNbO3 thin films for wideband bulk acoustic wave filters

2020 ◽  
Vol 10 (9) ◽  
pp. 1504-1510
Author(s):  
Ying Xing ◽  
Yao Shuai ◽  
Xiaoxue Wang ◽  
Lu Lv ◽  
Xiaoyuan Bai ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Acoustic Wave ◽  
Ion Irradiation ◽  
Wide Band ◽  
Bulk Acoustic Wave ◽  
Single Crystalline ◽  
Band Filter ◽  
Wave Filters ◽  
Baw Filter

Single crystalline lithium niobate (LN) thin films with a Y43-cut are fabricated by crystal-ion-slicing technique, and the B-staged benzocyclobutene (BCB) polymer is used as the bonding medium for the transferring of the LN thin film on to a homogeneous LN substrate. The thickness of the LN film is about 910 nm, and low energy ion irradiation is used to treat the surface of the film, which reduces the roughness from 12.4 nm down to 3.6 nm. Bulk acoustic wave (BAW) resonator is fabricated based on the thin LN layer, and the electromechanical coefficient (k2t) of the LN film reaches 16.3%. A 3-stage BAW filter is obtained, and the 3 dB bandwidth of the filter is 8.5%, demonstrating the single crystalline LN thin film with large k2t is promising for wide band filter.

Thin Film Bulk Acoustic Wave Resonators for Continuous Monitoring in the Physical, Chemical and Biological Realms

2009 ◽  
Vol 1222 ◽  
Author(s):  
Greg Ashley ◽  
Jack Luo ◽  
Paul Kirby ◽  
Timothy Butler ◽  
David Cullen
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Continuous Monitoring ◽  
Gas Flow ◽  
Bulk Acoustic Wave ◽  
Physical Parameters ◽  
Physical Chemical ◽  
Bulk Acoustic Wave Resonator ◽  
Wave Resonator ◽  
Film Bulk

AbstractA transducer that can act as a highly sensitive and reliable universal sensor capable of detecting and continuously monitoring changes in the physical, chemical and biological domains is a potentially useful scientific tool. The Thin Film Bulk Acoustic Wave Resonator (FBAR) is a microwave device that is becoming increasingly recognised as a universal transduction platform with the added advantage of potential integration into CMOS architecture and array-like formats. This work shows preliminary results on FBAR where a continuous monitoring arrangement demonstrated the capability of FBAR to respond to changes in physical parameters such as temperature and light levels, the work goes on further to show the ability of FBAR to respond to changes in humidity in a gas flow and can have sensitivity increased with the addition of hygroscopic polymers on its surface and finally how FBAR can be adapted to act as a biosensor in the form of an immunosensor with sensitivity some orders of magnitude greater than traditional lower frequency bulk acoustic wave platforms.

scholarly journals Energy trapping of thickness-extensional modes in thin film bulk acoustic wave filters

AIP Advances ◽  
2016 ◽  
Vol 6 (1) ◽  
pp. 015002 ◽  
Author(s):  
Zinan Zhao ◽  
Zhenghua Qian ◽  
Bin Wang
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Bulk Acoustic Wave ◽  
Energy Trapping ◽  
Film Bulk ◽  
Wave Filters
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