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    • 42. 发明授权
    • Wireless communication system using surface acoustic wave (SAW) second harmonic techniques
    • 无线通信系统采用声表面波(SAW)二次谐波技术
    • US07747220B2
    • 2010-06-29
    • US11863330
    • 2007-09-28
    • Peter J. EdmonsonColin K. Campbell
    • Peter J. EdmonsonColin K. Campbell
    • H04B7/00H04B1/26H04B15/00H04B1/00H03H9/00H04B11/00H04Q5/22
    • H03H9/6406G01S13/755H03H9/0028H03H9/0042
    • An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends itself to further application as a signal generator in a communication device. However, internal dimensions of IDTs are inversely proportional to operating frequency, such that high frequency IDTs present significant manufacturing difficulties. Fabrication of IDTs for high frequency applications is simplified by exploiting a harmonic frequency SAW generated by IDTs. An IDT may therefore be designed according to fundamental frequency internal dimension criteria but can operate at a multiple of the fundamental frequency, thereby providing much higher frequency operation than conventional SAW systems. Operation of a second harmonic SAW system at 2.4 GHz based on a fundamental frequency of 1.2 GHz is contemplated.
    • IDT在由单个电脉冲激励时产生SAW,并且可以被制造为体现代码,该代码提供SAW输入到IDT的无源自相关,从而使其进一步用作通信设备中的信号发生器 。 然而,IDT的内部尺寸与操作频率成反比,使得高频IDT存在显着的制造困难。 通过开发由IDT产生的谐波频率SAW,可以简化高频应用的IDT的制作。 因此,IDT可以根据基本频率内部尺寸标准设计,但是可以以基频的倍数工作,从而提供比常规SAW系统高得多的频率操作。 考虑到基于1.2GHz的基频的2.4GHz的二次谐波SAW系统的操作。
    • 44. 发明授权
    • Sweat sensor system and method of characterizing the compositional analysis of sweat fluid
    • 汗液传感器系统和表征汗液成分分析的方法
    • US07383072B2
    • 2008-06-03
    • US11124045
    • 2005-05-09
    • Peter J. EdmonsonDouglas W. Stoddard
    • Peter J. EdmonsonDouglas W. Stoddard
    • A61B5/05A61B5/00
    • A61B5/14521A61B5/4261A61B5/4266
    • A method of sensing the concentration level of at least one particular electrolyte in the sweat fluid of a subject, includes providing a sweat sensor system having sweat fluid absorbing material, measuring apparatus for sensing the electrical conductivity of sweat fluid absorbed by the absorbing material and producing ionic concentration data for said at least one particular electrolyte, and a user interface connected to the measurement apparatus for interpreting the data to a user. The absorbing material is applied to the skin of the subject to cause sweat fluid thereon to be absorbed by the absorbing material whereby the measurement apparatus produces ionic concentration data for the sweat fluid absorbed and the user interface interprets the data for a user.
    • 检测受试者的汗液中的至少一种特定电解质的浓度水平的方法包括提供具有汗液吸收材料的汗液传感器系统,用于感测由吸收材料吸收的汗液的导电性的测量装置,并产生 用于所述至少一种特定电解质的离子浓度数据,以及连接到测量装置的用户界面,用于将数据解释给用户。 将吸收材料施加到受试者的皮肤以使其上的汗液被吸收材料吸收,由此测量装置产生吸收的汗液的离子浓度数据,并且用户界面解释用户的数据。
    • 45. 发明授权
    • Adaptive tuning device and method utilizing a surface acoustic wave device for tuning a wireless communication device
    • 自适应调谐装置和利用表面声波装置调谐无线通信装置的方法
    • US06570462B2
    • 2003-05-27
    • US09867189
    • 2001-05-29
    • Peter J. EdmonsonColin K. Campbell
    • Peter J. EdmonsonColin K. Campbell
    • H03H1130
    • H03H9/0274H03H7/40H03H9/0042H03H9/14505H03H9/1455H03H9/642H03H11/30
    • An adaptive tuning method for a wireless communication device determines the impedance of a matching circuit relative to an impedance to be matched and adjusts the impedance of the matching circuit accordingly. A passive surface acoustic wave (SAW) device includes multiple terminated interdigital transducers (IDTs) which generate reflected SAWs when excited by incident SAWs, each reflected SAW having magnitude and phase characteristics dependent upon the particular IDT termination. According to the invention, the IDT terminations include the impedance matching circuit and the impedance to be matched. Input IDTs in the SAW device are excited with electrical signals, which are converted to generate the incident SAWs. The resultant reflected SAWs are converted by output IDTs into output electrical signal signals which can then be analyzed to determine magnitude and phase differences between the output electrical signal signals and generate an impedance matching circuit control signal based thereon.
    • 用于无线通信设备的自适应调谐方法确定匹配电路相对于要匹配的阻抗的阻抗,并相应地调整匹配电路的阻抗。 无源表面声波(SAW)器件包括当由入射SAW激发时产生反射SAW的多个端接的叉指式换能器(IDT),每个反射的SAW具有取决于特定IDT终止的幅度和相位特性。 根据本发明,IDT终端包括阻抗匹配电路和要匹配的阻抗。 SAW器件中的输入IDT被电信号激励,电信号被转换以产生入射的SAW。 所得到的反射的SAW由输出IDT转换为输出电信号信号,然后可以对其进行分析,以确定输出电信号信号之间的幅度和相位差,并基于此产生阻抗匹配电路控制信号。