公开(公告)号：US4920522A

公开(公告)日：1990-04-24

申请号：US41216

申请日：1987-04-22

Applicant: Wilhelm Duerr ,  Ralph Oppelt

Inventor： Wilhelm Duerr ,  Ralph Oppelt

IPC: A61B5/055 ,  A61B10/00 ,  G01R29/08 ,  G01R33/02 ,  G01R33/028 ,  G01R33/36 ,  G01R33/58 ,  G10K11/24 ,  G01V1/00

CPC classification number: G01R33/3621 ,  A61B5/055 ,  G01R29/0892 ,  G01R33/028 ,  G10K11/24 ,  G01R33/3692

Abstract: A method and apparatus for measuring electrical or magnetic fields, such as high-frequency alternating fields in a nuclear magnetic resonance tomography device, convert a test signal into a corresponding ultrasound signal, and transmit the ultrasound signal to a receiver, where the received signal is converted back into an electrical signal. The transmission path contains no metallic components and thus does not cause any disturbance in the field being measured.

Abstract translation: 用于测量诸如核磁共振断层摄影装置中的高频交变场的电场或磁场的方法和装置将测试信号转换为对应的超声信号，并将超声信号发送到接收机，其中接收的信号为 转换回电信号。 传输路径不含金属成分，因此不会在被测场中产生干扰。

公开(公告)号：US4725782A

公开(公告)日：1988-02-16

申请号：US36797

申请日：1987-04-10

Applicant: Ralph Oppelt ,  Wilhelm Duerr

Inventor： Ralph Oppelt ,  Wilhelm Duerr

IPC: A61B10/00 ,  A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/422 ,  G01R33/20

CPC classification number: G01R33/422

Abstract: An antenna structure for exciting a substantially homogeneous magnetic RF field and/or for receiving RF signals in a nuclear magnetic resonance tomography apparatus includes a hollow cylindrical conductor sheath which is substantially transmissive at low frequencies for gradient magnetic fields, a number of conductor units within the conductor sheath, each conductor unit including at least one conductor element, and RF reflector disposed at the end faces of the antenna structure and an external energy feed or reception device. In this antenna structure, the current drop which increasingly occurs toward the end faces of the antenna structure is largely compensatable by shaping the electrically conductive cross-section of the conductor units so as to decrease symmetrically from an axial center of the antenna structure moving toward the end faces of the structure. The conductor units thus have a largest cross-section at a center of the antenna structure, and a smallest cross-section at the end faces.

Abstract translation: 在核磁共振断层摄影装置中用于激发基本上均匀的磁RF场和/或用于接收RF信号的天线结构包括：中空圆柱形导体护套，其在低频下对于梯度磁场基本上是透射的，所述多个导体单元在 导体护套，每个导体单元包括至少一个导体元件，以及设置在天线结构的端面处的RF反射器和外部能量馈送或接收装置。 在该天线结构中，朝向天线结构的端面越来越多地发生的电流下降通过对导体单元的导电横截面进行成形以便从天线结构的轴向中心对称地向着 结构的端面。 因此，导体单元在天线结构的中心处具有最大的横截面，并且在端面处具有最小的横截面。

公开(公告)号：US09954700B2

公开(公告)日：2018-04-24

申请号：US14602239

申请日：2015-01-21

Applicant: Ralph Oppelt ,  Michael Wiehl

Inventor： Ralph Oppelt ,  Michael Wiehl

IPC: H04L27/12 ,  H04L5/00 ,  H04L25/02 ,  H04W72/04

CPC classification number: H04L27/12 ,  H04L5/0048 ,  H04L25/0226 ,  H04W72/0453

Abstract: A transmitting apparatus for transmitting a frequency-modulated signal is provided. The transmitting apparatus includes a pilot tone generation device for generating a pilot tone. The transmitting apparatus also includes a modulation device for obtaining the generated pilot tone and a modulating useful signal and for generating a frequency-modulated signal based on a combination of the generated pilot tone and the modulating useful signal. The generated pilot tone has a frequency outside a frequency range of the modulating useful signal in order to vary a frequency range of the frequency-modulated signal.

公开(公告)号：US09529067B2

公开(公告)日：2016-12-27

申请号：US14018139

申请日：2013-09-04

Applicant: Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

Inventor： Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

IPC: G01R33/54 ,  G01R33/36 ,  G01R33/3415

CPC classification number: G01R33/54 ,  G01R33/3415 ,  G01R33/3621 ,  G01R33/3692

Abstract: An arrangement for the transmission of magnetic resonance signals that are received with the aid of local coils is provided. The magnetic resonance signal is fed to an analog/digital converter and digitized by the analog/digital converter. The magnetic resonance signal is compressed in amplitude before being fed to the analog/digital converter, is low-pass filtered or band-pass filtered, and is expanded after digitization by the analog/digital converter. A clock rate that is higher by a factor 2n than a sampling rate n of the analog/digital converter (ADC) is used for the digital expander. A digital equalizing filter for compensating for a filter transmission function in a transition range may also be used.

Abstract translation: 提供了借助于本地线圈接收的用于传输磁共振信号的装置。 磁共振信号被馈送到模拟/数字转换器并由模拟/数字转换器数字化。 在馈送到模拟/数字转换器之前，磁共振信号以幅度被压缩，被低通滤波或带通滤波，并且在通过模拟/数字转换器数字化之后被扩展。 数字扩展器使用比模拟/数字转换器（ADC）的采样率n高2n倍的时钟速率。 也可以使用用于补偿过渡范围内的过滤器传递功能的数字均衡滤波器。

公开(公告)号：US09154106B2

公开(公告)日：2015-10-06

申请号：US13538805

申请日：2012-06-29

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03H7/42 ,  G01R33/36 ,  H03H5/00 ,  H03H1/00

CPC classification number: H03H7/42 ,  G01R33/3685 ,  H03H2001/005

Abstract: For broadband applications of a balun in a magnetic field, the balun includes at least three line transformers each having two transformer sides. At least two transformer sides of the balun that belong to different line transformers of the at least three line transformers are embodied for the same voltage drop at least in terms of magnitude. The at least two transformer sides of the balun are also embodied with an identical number of turns. Two transformer sides connected in parallel are replaced by a single coil, with the result that the balun may be produced from a five-wire structure.

Abstract translation: 对于在磁场中的平衡 - 不平衡转换器的宽带应用，平衡 - 不平衡变压器包括至少三个线变压器，每个变压器具有两个变压器侧。 属于至少三个线路变压器的不同线路变压器的平衡不平衡变换器的至少两个变压器侧至少在幅度方面被体现为相同的电压降。 平衡 - 不平衡变换器的至少两个变压器侧面也具有相同数量的匝数。 并联连接的两个变压器侧由单个线圈代替，结果是平衡 - 不平衡变压器可以由五线结构制成。

公开(公告)号：US20150244054A1

公开(公告)日：2015-08-27

申请号：US14618128

申请日：2015-02-10

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H01P5/18 ,  G01R33/36 ,  H03H7/38 ,  G01R33/34 ,  H01F30/02 ,  H01F38/14

CPC classification number: H01P5/18 ,  G01R33/34092 ,  G01R33/36 ,  H01F30/02 ,  H01F38/023 ,  H01F38/14 ,  H01F2038/026 ,  H01F2038/146 ,  H03H7/38 ,  H03H7/48

Abstract: The embodiments relate to a directional coupler including, in each case, one connection for a first, a second, a third, and a fourth port. The coupler includes a first coupling network for providing the connection for the first port and a second coupling network for providing the connection for the second port. The first and second coupling networks are both connected to the connections for the third and fourth ports, wherein the second coupling network has a first inductance connected between the third port and an electrical reference potential, a first capacitance connected between the fourth port and the electrical reference potential, a second capacitance connected between the third port and the second port, and a second inductance connected between the fourth port and the second port.

Abstract translation: 实施例涉及一种定向耦合器，在每种情况下包括用于第一端口，第二端口，第三端口和第四端口的一个连接。 耦合器包括用于为第一端口提供连接的第一耦合网络和用于为第二端口提供连接的第二耦合网络。 第一和第二耦合网络都连接到用于第三和第四端口的连接，其中第二耦合网络具有连接在第三端口和电参考电位之间的第一电感，连接在第四端口与电气参考电位之间的第一电容 参考电位，连接在第三端口和第二端口之间的第二电容器，以及连接在第四端口和第二端口之间的第二电感器。

公开(公告)号：US20140009237A1

公开(公告)日：2014-01-09

申请号：US13934183

申请日：2013-07-02

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03C3/00

CPC classification number: H03C3/00 ,  G01R33/36 ,  H03B2200/004 ,  H03B2201/011 ,  H03B2201/0208 ,  H03C3/22 ,  H03L7/099

Abstract: A frequency modulator includes a first pair of diodes with two capacity diodes, and a second pair of diodes with two additional capacity diodes. The second pair of diodes is employed in parallel. The frequency modulator also includes a first modulator input for reception of a first modulation signal and a second modulator input for reception of a symmetrical second modulation signal. Both pairs of diodes are coupled to an oscillator unit.

Abstract translation: 频率调制器包括具有两个容量二极管的第一对二极管和具有两个附加容量二极管的第二对二极管。 第二对二极管并联使用。 频率调制器还包括用于接收第一调制信号的第一调制器输入和用于接收对称的第二调制信号的第二调制器输入。 两对二极管耦合到振荡器单元。

公开(公告)号：US08513998B2

公开(公告)日：2013-08-20

申请号：US13230627

申请日：2011-09-12

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03K12/00

CPC classification number: H03K5/086 ,  H03K5/1565

Abstract: A circuit for providing an AC signal includes an amplifier having an input and an output. A sinusoidal signal is applicable at the input of the amplifier. The output of the amplifier is connected to the input via a lowpass filter or via a part of the lowpass filter.

Abstract translation: 用于提供AC信号的电路包括具有输入和输出的放大器。 正弦信号可应用于放大器的输入端。 放大器的输出通过低通滤波器或低通滤波器的一部分连接到输入端。

公开(公告)号：US20130169375A1

公开(公告)日：2013-07-04

申请号：US13538805

申请日：2012-06-29

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03H7/42

CPC classification number: H03H7/42 ,  G01R33/3685 ,  H03H2001/005

Abstract: For broadband applications of a balun in a magnetic field, the balun includes at least three line transformers each having two transformer sides. At least two transformer sides of the balun that belong to different line transformers of the at least three line transformers are embodied for the same voltage drop at least in terms of magnitude. The at least two transformer sides of the balun are also embodied with an identical number of turns. Two transformer sides connected in parallel are replaced by a single coil, with the result that the balun may be produced from a five-wire structure.

Abstract translation: 对于在磁场中的平衡 - 不平衡转换器的宽带应用，平衡 - 不平衡变压器包括至少三个线变压器，每个变压器具有两个变压器侧。 属于至少三个线路变压器的不同线路变压器的平衡不平衡变换器的至少两个变压器侧至少在幅度方面被体现为相同的电压降。 平衡 - 不平衡变换器的至少两个变压器侧面也具有相同数量的匝数。 并联连接的两个变压器侧由单个线圈代替，结果是平衡 - 不平衡变压器可以由五线结构制成。

公开(公告)号：US08379549B2

公开(公告)日：2013-02-19

申请号：US12645829

申请日：2009-12-23

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: H04L5/00

CPC classification number: G08C15/02 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/3657 ,  H04J1/08

Abstract: In a method and device for the transmission of a multiplicity of signals having different frequencies between a base station and a module situated at a location remote from the base station via a single, common cable connection, some of the signals being transmitted from the electronic assembly to the module and, in general simultaneously, the remaining signals are transmitted in the opposite direction. Each of the base station and the module has bandpass filter bank therein having a multiplicity of bandpass filters, the number thereof being a function of the number of channels to be transmitted, with which the respectively received signals are spectrally separated from one another so that they are available for further signal processing in the base station, or for further use in the module.

Abstract translation: 在用于通过单个公共电缆连接在位于远离基站的位置的基站和模块之间传输具有不同频率的多个信号的方法和装置中，一些信号从电子组件传送 并且通常同时地，剩余的信号以相反方向传输。 基站和模块中的每一个具有带通滤波器组，其中具有多个带通滤波器，其数量是要发送的信道数量的函数，分别接收的信号彼此频谱分离，使得它们 可用于在基站中进一步的信号处理，或用于模块中的进一步使用。