The Application and Trend of BAW Devices Using Piezoelectric Quartz Crystal

The sensitivities to acceleration frequency of SAW resonators are obviously higher than that of BAW resonators.

表面波谐振器的加速度频率灵敏度明显高于体波谐振器的频率灵敏度。

The Application of BAW Delay Line in EW System

声体波延迟线在电子战中的应用

Research on Suppressing BAW in SAW Filter by Grooving on the Back of the Substrate

基片开槽抑制SAW滤波器体声波的工艺研究

The growth kinetics and the stability of synergistic films of benzotriazole ( BTA) and halide ion ( X-) were investigated by bulk acoustic wave ( BAW) method.

采用体声波传感技术就卤素离子与铜缓蚀剂&苯骈三氮唑（BTA）协同成膜的动力学及相应复合膜的稳定性进行了研究。

Some 4.2 GHz BAW delay line devices were produced, which delay time is 50 ns and 70 ns respectively.

制作了工作频率4.2GHz，延迟时间分别为50ns和70ns的器件。

A High Power Reflective BAW Microwave Delay Line

大功率反射式体声波微波延迟线

The international standard for radar altimeter is 4.3 GHz. The calibration of altimeter and corresponding target stimulation is implemented by co-core cable delay line or BAW microwave delay line.

国际通用的无线电高度计频段在4.3GHz，高度计校准和相应的目标模拟一般都采用同轴电缆延迟线或声体波微波延迟线。

The slowness curves of BAW in different planes of LGS were plotted. The propagating characteristics of SAW were also described.

从理论上分析计算了LGS声体波传播特性，画出BAW慢度曲线。

It appears that, in general, the acoustic velocity of the LGS crystal is about 1000m/ s smaller than that of α-SiO_2.The results can provide some theoretical guidances for design and application of the LGS crystal in BAW device.

计算了声速的最大值并与石英进行比较，结果表明LGS晶体的BAW传播速度一般比石英低1000m/s左右。为该晶体在声体波器件等方面的设计和应用提供了一定的理论指导作用。

The successful development of a high power reflective BAW ( Bulk Acoustic Wave) microwave delay line with a one-port network is repo-rted utilizing the configuration of a one-dimensionally longitudinal Au// Cr/ ZnO/ Au/ Cr/ Z-Al2O3 thin film transducer.

本报告介绍了采用Au/Cr/ZnO/Au/Cr/Z-Al2O q一维纵向薄膜换能器结构，研制成大功率反射式体声波单端口网络的微波延迟线。

However, traditional BAW sensors have been found obvious disadvantages in many practical applications.

但是，传统的体声波传感器在实际应用中存在许多明显的不足。

Major problems in application of BMS and cause analyses

BMS系统应用中的主要问题及原因分析

Technical upgrading of boiler burning management system ( BMS) in power plant

二期电站锅炉燃烧管理控制系统（BMS）的技术改造

The system can test and evaluate BMS, with a certain application value.

通过实验验证，本系统能够对电池管理系统实施测试和评价，具有一定的应用价值。

Finally, the experimental study of BMS is taken.

最后在该实验台架上进行了电池管理系统的实验研究。

The leaf wax of N. affinis ( Rendle) Keng f. was rarely affected by soil contribution in buried conditions, so it can reflect the early diagenetic effects on leaf wax compositions and their n-alkanes carbon isotopic compositions under buried conditions.

慈竹叶蜡在埋藏条件下很少受土壤污染，能比较客观的反映叶蜡各成分及正构烷烃同位素组成在埋藏条件下的早期成岩效应。

But the decline in like-for-like sales means that the performance overall is "fragile," said Euromonitor analyst Karla Rendle.

但是欧睿分析师卡拉•伦德尔（Karla Rendle）说，同店销售额的下滑表明，麦当劳的总体表现比较“脆弱”。

In the Shennongjia National Nature Reserve of Central China, the vegetative growth behavior of henon bamboo ( Phyllostachys nigra var. henonis ( Mitford) Stapf. ex Rendle) was studied from shoot recruitment to culm establishment.

研究了华中神农架自然保护区毛金竹（Phyllostachys nigra var.henonis（Mitford）Stapf.ex Rendle）从发笋到成竹的营养生长行为。

Several shortcomings of SRR suggested by Pendry resist the practice of LHM. The composite structure of SRR and wires has the disadvantages of high loss and narrow frequency band.

Pendry所提出的应用SRR和金属线实现的左手媒质结构有几个明显缺陷，高损耗，窄频带，相对大的结构尺寸使得这个结构还不能进入实用阶段。

Several years ago Sir John Pendry, a physicist at Imperial College, London, who was musing on this idea, realised that such a material would make a perfect lens.

几年前，伦敦皇家大学的约翰？彭德瑞爵士（Sir John Pendry）对这个想法进行了深思，他意识到这样的材料将有助于制造出理想的透镜。