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1.发明申请Wireless Communication System Using Surface Acoustic Wave (SAW) Second Harmonic Techniques 有权无线通信系统使用表面声波（SAW）二次谐波技术公开(公告)号：US20100220772A1
公开(公告)日：2010-09-02
申请号：US12778818
申请日：2010-05-12
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： A system is for encoding information on a passive surface acoustic wave (SAW) device. The system includes a requesting unit configured to wirelessly transmit an impulse signal. The impulse signal is a signal that includes only a single pulse. A SAW device has an interdigital transducer (IDT) configured to physically store coded data. The SAW device is configured to receive the impulse signal. In response to receiving the impulse signal, the SAW device excites the IDT to generate a coded signal that includes the stored coded data and frequency components at a fundamental frequency.
摘要翻译： 一种用于编码无源声表面波（SAW）装置的信息的系统。 该系统包括被配置为无线地发送脉冲信号的请求单元。 脉冲信号是仅包含单个脉冲的信号。 SAW器件具有配置为物理存储编码数据的叉指式换能器（IDT）。 SAW器件被配置为接收脉冲信号。 响应于接收脉冲信号，SAW器件激励IDT以产生包括存储的编码数据和基频的频率分量的编码信号。
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2.发明授权Wireless communication system using surface acoustic wave (SAW) second harmonic techniques 有权无线通信系统采用声表面波（SAW）二次谐波技术公开(公告)号：US06825794B2
公开(公告)日：2004-11-30
申请号：US09863944
申请日：2001-05-23
IPC分类号： G01S1375
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. 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. A communication system based on SAW harmonic techniques would be low-cost, low-power, small and simple alternative to known short range communications schemes, including for example the Bluetooth™ solution. Operation of a second harmonic SAW system at 2.4 GHz based on a fundamental frequency of 1.2 GHz is contemplated.
摘要翻译： 诸如叉指式换能器（IDT）之类的SAW器件已被广泛应用于雷达应用和滤波器。 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。 基于SAW谐波技术的通信系统将是低成本，低功率，小而简单的替代已知的短距离通信方案，包括例如Bluetooth TM解决方案。 考虑到基于1.2GHz的基频的2.4GHz的二次谐波SAW系统的操作。
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3.发明授权Wireless communication system using surface acoustic wave (SAW) single-phase unidirectional transducer (SPUDT) techniques 有权无线通信系统采用表面声波（SAW）单相单向传感器（SPUDT）技术公开(公告)号：US06462698B2
公开(公告)日：2002-10-08
申请号：US09864507
申请日：2001-05-24
IPC分类号： G01S1375
CPC分类号： H03H9/44 , G01S13/755 , H03H9/0274 , H03H9/14505
摘要： SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. 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, conventional SAW expanders and compressors typically have insertion losses greater than 20 dB, which can have a profound effect on an RF link budget in a communication system. Insertion losses are drastically reduced by using a single phase unidirectional transducer (SPUDT-type) instead of a conventional IDT as a SAW expander/compressor. A SPUDT-type reflects SAW components which are lost in conventional IDT designs so that a stronger SAW is directed toward a transmission element. In a receiver, a SPUDT-type directs a stronger SAW toward a compressor IDT. A communication system based on SPUDT-type techniques would be low-cost, low-power, small and simple alternative to known short range communications schemes, including for example the BLUETOOTH™ solution. Operation of a SAW system at a frequency of 2.4 GHz is contemplated.
摘要翻译： 诸如叉指式换能器（IDT）之类的SAW器件已被广泛应用于雷达应用和滤波器。 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，传统的SAW膨胀器和压缩机通常具有大于20dB的插入损耗，这可以对通信系统中的RF链路预算产生深远的影响。 通过使用单相单向换能器（SPUDT型）而不是常规的IDT作为SAW膨胀机/压缩机，插入损耗大大降低。 SPUDT型反映了在常规IDT设计中丢失的SAW分量，使得更强的SAW指向传输元件。 在接收机中，SPUDT型可以将更强的SAW引导到压缩机IDT。 基于SPUDT型技术的通信系统将是低成本，低功率，小而简单的替代已知短距离通信方案，包括例如BLUETOOTH TM解决方案。 考虑到以2.4GHz的频率操作SAW系统。
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4.发明授权Wireless communication system using surface acoustic wave (SAW) second harmonic techniques 有权无线通信系统采用声表面波（SAW）二次谐波技术公开(公告)号：US08463185B2
公开(公告)日：2013-06-11
申请号：US13563922
申请日：2012-08-01
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： A system is for encoding information on a passive surface acoustic wave (SAW) device. The system includes a requesting unit configured to wirelessly transmit an impulse signal. The impulse signal is a signal that includes only a single pulse. A SAW device has an interdigital transducer (IDT) configured to physically store coded data. The SAW device is configured to receive the impulse signal. In response to receiving the impulse signal, the SAW device excites the IDT to generate a coded signal that includes the stored coded data and frequency components at a fundamental frequency.
摘要翻译： 一种用于编码无源声表面波（SAW）装置的信息的系统。 该系统包括被配置为无线地发送脉冲信号的请求单元。 脉冲信号是仅包含单个脉冲的信号。 SAW器件具有配置为物理存储编码数据的叉指式换能器（IDT）。 SAW器件被配置为接收脉冲信号。 响应于接收脉冲信号，SAW器件激励IDT以产生包括存储的编码数据和基频的频率分量的编码信号。
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5.发明授权Wireless communication system using surface acoustic wave (SAW) second harmonic techniques 有权无线通信系统采用声表面波（SAW）二次谐波技术公开(公告)号：US07747220B2
公开(公告)日：2010-06-29
申请号：US11863330
申请日：2007-09-28
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： 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.
摘要翻译： 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。
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6.发明授权Adaptive tuning device and method utilizing a surface acoustic wave device for tuning a wireless communication device 有权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公开(公告)号：US06570462B2
公开(公告)日：2003-05-27
申请号：US09867189
申请日：2001-05-29
IPC分类号： H03H1130
CPC分类号： H03H9/0274 , H03H7/40 , H03H9/0042 , H03H9/14505 , H03H9/1455 , H03H9/642 , H03H11/30
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07005964B2
公开(公告)日：2006-02-28
申请号：US10400656
申请日：2003-03-28
IPC分类号： H04Q5/22
CPC分类号： G06K19/0675 , G06K19/0672
摘要： A SAW RFID tag or sensor has an antenna for receiving and propagating an RF signal, an input/output IDT electrically connected to the antenna, and a dual track reflective IDT having a first track and a second track located adjacent and acoustically coupled to the input/output IDT. An RF signal received from the antenna by the input/output IDT is transformed by the input/output IDT into an acoustic way which is propagated to the dual track IDT. One track of the dual track IDT is in-phase with the phase reference of the input/output IDT and the other track is in quadrature phase with said phase reference. The input/output IDT receives two orthogonal complex modulated acoustic waves reflected from the first and second tracks and transforms them to a modulated orthogonal complex RF signal which is propagated from the antenna.
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8.发明授权Encoded SAW RFID tags and sensors for multi-user detection using IDT finger phase modulation 失效编码的SAW RFID标签和传感器，用于使用IDT手指相位调制的多用户检测公开(公告)号：US06827281B2
公开(公告)日：2004-12-07
申请号：US10323827
申请日：2002-12-20
IPC分类号： G06K1906
CPC分类号： G06K19/0672 , G06K19/0675 , H03H9/6406
摘要： A group of SAW RFID tags or sensors each has a transducer with interdigitated fingers, a different set of fingers in each tag or sensor being reversed in phase to cause the tag or sensor to provide a unique identifier in a returned impulse response produced by the tag or sensor when interrogated by an interrogation signal.
摘要翻译： 一组SAW RFID标签或传感器各自具有带指状叉指的换能器，每个标签或传感器中的不同的手指组相位反转，以使得标签或传感器在由标签产生的返回脉冲响应中提供唯一的标识符 或通过询问信号询问的传感器。
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9.发明申请Wireless Communication System Using Surface Acoustic Wave (SAW) Second Harmonic Techniques 有权无线通信系统使用表面声波（SAW）二次谐波技术公开(公告)号：US20120294340A1
公开(公告)日：2012-11-22
申请号：US13563922
申请日：2012-08-01
IPC分类号： H04B1/38
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： A system is for encoding information on a passive surface acoustic wave (SAW) device. The system includes a requesting unit configured to wirelessly transmit an impulse signal. The impulse signal is a signal that includes only a single pulse. A SAW device has an interdigital transducer (IDT) configured to physically store coded data. The SAW device is configured to receive the impulse signal. In response to receiving the impulse signal, the SAW device excites the IDT to generate a coded signal that includes the stored coded data and frequency components at a fundamental frequency.
摘要翻译： 一种用于编码无源声表面波（SAW）装置的信息的系统。 该系统包括被配置为无线地发送脉冲信号的请求单元。 脉冲信号是仅包含单个脉冲的信号。 SAW器件具有配置为物理存储编码数据的叉指式换能器（IDT）。 SAW器件被配置为接收脉冲信号。 响应于接收脉冲信号，SAW器件激励IDT以产生包括存储的编码数据和基频的频率分量的编码信号。
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10.发明授权Wireless communication system using surface acoustic wave (SAW) second harmonic techniques 有权无线通信系统采用声表面波（SAW）二次谐波技术公开(公告)号：US08260204B2
公开(公告)日：2012-09-04
申请号：US13325262
申请日：2011-12-14
CPC分类号： H03H9/6406 , G01S13/755 , H03H9/0028 , H03H9/0042
摘要： A system is for encoding information on a passive surface acoustic wave (SAW) device. The system includes a requesting unit configured to wirelessly transmit an impulse signal. The impulse signal is a signal that includes only a single pulse. A SAW device has an interdigital transducer (IDT) configured to physically store coded data. The SAW device is configured to receive the impulse signal. In response to receiving the impulse signal, the SAW device excites the IDT to generate a coded signal that includes the stored coded data and frequency components at a fundamental frequency.
摘要翻译： 一种用于编码无源声表面波（SAW）装置的信息的系统。 该系统包括被配置为无线地发送脉冲信号的请求单元。 脉冲信号是仅包含单个脉冲的信号。 SAW器件具有配置为物理存储编码数据的叉指式换能器（IDT）。 SAW器件被配置为接收脉冲信号。 响应于接收脉冲信号，SAW器件激励IDT以产生包括存储的编码数据和基频的频率分量的编码信号。
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