Design of Solid Mounted Components Using Bulk Acoustic Wave Technology for Communication

2012 ◽  
Vol 433-440 ◽  
pp. 7579-7582
Author(s):  
B Venkatalakshmi ◽  
K Radhika
Keyword(s):  
Acoustic Wave ◽  
Communication Systems ◽  
High Performance ◽  
Acoustic Resonator ◽  
Bulk Acoustic Wave ◽  
Design System ◽  
Communication Industry ◽  
Rf Design ◽  
Recent Addition ◽  
Run Up

Low power and portable systems working at high frequency are becoming a significant force in the communication industry. SAW filters have been used in wireless communication systems since the early days of mobile phones. But applications at the higher handset frequencies run up against the capability of conventional SAW structures. Bulk Acoustic Wave (BAW) Technology, a relatively recent addition to this portfolio follows MEMS principle to design high performance microwave components for RF communication. Simulation of the Bulk Acoustic Resonator using Butterworth Van Dyke Model (BVD) Model and design of Ladder Filter with the designed resonator in the RF design platform Agilent ADS (Advanced Design System) have been presented. The simulated results confirm the tuning of operating frequency of designed BAW device at 2.4 GHz.

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.

scholarly journals Numerical Investigation of Phononic Crystal Based Film Bulk Acoustic Wave Resonators

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2547
Author(s):  
Linhao Shi ◽  
Weipeng Xuan ◽  
Biao Zhang ◽  
Shurong Dong ◽  
Hao Jin ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
High Performance ◽  
Phononic Crystal ◽  
Acoustic Resonator ◽  
Acoustic Energy ◽  
Bulk Acoustic Wave ◽  
Frequency Range ◽  
Quality Factors ◽  
Film Bulk ◽  
Power Capability

Film bulk acoustic resonator (FBAR)-based filters have attracted great attention because they can be used to build high-performance RF filters with low cost and small device size. Generally, FBARs employ the air cavity and Bragg mirror to confine the acoustic energy within the piezoelectric layer, so as to achieve high quality factors and low insertion loss. Here, two-dimensional (2D) phononic crystals (PhCs) are proposed to be the acoustic energy reflection layer for an FBAR (PhC-FBAR). Four kinds of PhC structures are investigated, and their bandgap diagrams and acoustic wave reflection coefficients are analyzed using the finite element method (FEM). Then, the PhCs are used as the acoustic wave reflectors at the bottom of the piezoelectric stack, with high reflectivity for elastic waves in the specific frequency range. The results show that the specific PhC possesses a wide bandgap, which enables the PhC-FBAR to work at a broad frequency range. Furthermore, the impedance spectra of PhC-FBARs are very smooth with few spurious modes, and the quality factors are close to those of traditional FBARs with air cavities, showing the application potential of the PhC-FBAR filters with wide bandwidth and high power capability.

Influence of Initial Stresses and Piezoelectric Constants on the Propagation Bulk Acoustic Waves in an Anisotropic Smart Material (Aluminum Nitrite)

2016 ◽  
Vol 13 (10) ◽  
pp. 6488-6494 ◽  
Author(s):  
Abo-el-nour N Abd-alla ◽  
Fatimah Alshaikh ◽  
Idir Mechai ◽  
I. A Abbas
Keyword(s):  
Acoustic Wave ◽  
Acoustic Waves ◽  
High Performance ◽  
Plane Waves ◽  
Initial Stresses ◽  
Bulk Acoustic Wave ◽  
Sound System ◽  
Bulk Acoustic Waves ◽  
Anisotropic Elastic ◽  
Piezoelectric Constants

The aim of this paper is to illustrate the effect of initial stresses on the propagation of plane waves in a general anisotropic elastic medium. Therefore, an analytical analysis supported by numerical tests to calculate the bulk acoustic wave propagation in Aluminum Nitrite (AlN) as piezoelectric hexagonal elastic material has been presented. In addition, the Christoffel’s equation has been solved and the corresponding eigenvalues and eigenvectors have been obtained. Then, an explicit expressions of the waves propagation with three distinct phase velocities in anisotropic piezoelectric material including the effect of the initial stresses have been derived. The three velocities of bulk acoustic waves (BAW) which are called quasi-longitudinal, quasi-shear vertical and quasi-shear horizontal for Aluminum Nitrite are numerically calculated. The numerical examples are considered to illustrate graphically the effect of initial stresses on the variations of velocities of the BAW versus the angle of the propagation. The velocities of BAW change significantly with initial stresses as well as piezoelectric constants. This research is theoretically useful in signal processing, sound system, wireless communication and for the design of surface acoustic wave (SAW) devices with high performance.

scholarly journals Bulk Acoustic Wave Characteristics of Pseudo Lateral-Field-Excitation on LGT Single Crystal for Liquid Phase Sensing

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1076 ◽  
Author(s):  
Jiachao Xu ◽  
Tingfeng Ma ◽  
Liang Yan ◽  
Mingfei Wang ◽  
Ji Wang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Acoustic Wave ◽  
High Performance ◽  
Bulk Acoustic Wave ◽  
Shear Mode ◽  
Crystallographic Axis ◽  
Lateral Field ◽  
Wave Characteristics ◽  
Field Excitation ◽  
The One

In the present study, pseudo lateral-field-excitation (LFE) bulk acoustic wave characteristics on LGT crystals are investigated to increase the sensitivity of LFE devices on the liquid characteristic variations. The cut orientation of LGT crystals for pseudo-LFE is investigated and verified experimentally. For an LFE device in the pseudo-LFE mode, the thickness shear mode wave is excited by the thickness field rather than the lateral field. The present work shows that when the (yxl) 13.8° LGT plate is excited by the electric field parallel to the crystallographic axis x, it operates in the pseudo-LFE mode. Moreover, characteristics of devices including the sensitivity and impedance are investigated. The present work shows that sensitivity of LFE devices to variation of the conductivity and permittivity of the aqueous solution are 9 and 3.2 times higher than those for AT-cut quartz crystal based devices, respectively. Furthermore, it has been found that the sensitivity of the LGT LFE sensor to liquid acoustic viscosity variations is 1.4 times higher than the one for the AT-cut quartz sensor. The results are a critical basis of designing high-performance liquid phase sensors by using pseudo-LFE devices.

Synthesis and design of filters and multiplexers with acoustic transversal topology

2021 ◽  
pp. 1-8
Author(s):  
Rafael Perea-Robles ◽  
Jordi Mateu ◽  
Carlos Collado ◽  
Yazid Yusuf ◽  
Alfred Gimenez ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Acoustic Resonator ◽  
Practical Aspect ◽  
Bulk Acoustic Wave ◽  
Potential Candidate ◽  
The Novel ◽  
Acoustic Coupling ◽  
New Synthesis ◽  
Synthesis Procedure ◽  
Synthesis Approach

Abstract The novel acoustic transversal topology has demonstrated to be a potential candidate for the development of the next generation of communication filters. The major asset of this topology is its capacity to achieve any filter response without the detriment of limited electro-acoustic coupling. Additionally, this topology prompts for an easy connection of different filters to create multiband and multiplexing responses. This study recalls and further details on the design of multiplexers based on transversal topology using bulk acoustic wave (BAW) or surface acoustic wave (SAW) resonators. An important practical aspect of this topology is the need of a BALUN stage at one port of the filter. The use of the transversal topology is then applied to another type of acoustic resonator configuration, coupled resonator filter (CRF). Such a resonator configuration offers control over the phase of each transversal path, allowing us to eliminate the BALUN stage. CRF resonators are modeled by means of a different circuit model than BAW or SAW, which calls for a new synthesis procedure. This paper describes the synthesis approach and circuit transformation for the development of multiplexers based on the transversal arrangement of the CRF resonators. An example of a fully simulated 9-plexer is provided to verify this procedure.

High-Performance Film Bulk Acoustic Wave Pressure and Temperature Sensors

2007 ◽  
Vol 46 (4A) ◽  
pp. 1392-1397 ◽  
Author(s):  
Kuan-Hsun Chiu ◽  
Hong-Ren Chen ◽  
Star Ruey-Shing Huang
Keyword(s):  
Acoustic Wave ◽  
High Performance ◽  
Temperature Sensors ◽  
Bulk Acoustic Wave ◽  
Wave Pressure ◽  
Film Bulk
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