公开(公告)号：US5128615A

公开(公告)日：1992-07-07

申请号：US623210

申请日：1990-12-06

Applicant: Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

Inventor： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

IPC: G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC classification number: G01R33/3678 ,  G01R33/34 ,  G01R33/341

Abstract: A resonator for use in a magnetic resonance imaging apparatus for transmitting and receiving high frequency signals is formed by a combination of two antenna sub-systems, which generate respective magnetic fields which are perpendicular to each other, with the currents in the sub-system being phase-shifted by 90.degree. relative to each other, and each sub-system includes a capacitance which defines the resonant frequency. Each of the sub-systems forms a current loop, the current loops containing a common current network and a common base plate, which serves as a return path for both current loops. The junctions of the current network are connected via the resonant capacitances to the base plate, which consists of electrically conductive material. A circularly polarizing resonator is achieved for the transversal, fundamental field of the imaging apparatus, with the resonator also being capable of use as a surface resonator if the spacing between the current network and the base plate is small.

Abstract translation: 用于发送和接收高频信号的磁共振成像装置的谐振器由两个天线子系统的组合形成，两个天线子系统产生彼此垂直的各个磁场，子系统中的电流为 相对于彼此相移90度，并且每个子系统包括限定谐振频率的电容。 每个子系统形成电流回路，电流回路包含公共的当前网络和公共基板，其作为两个电流回路的返回路径。 当前网络的接点通过谐振电容连接到由导电材料组成的基板。 对于成像装置的横向基本场，实现圆偏振谐振器，如果当前网络和基板之间的间隔小，则谐振器也能够用作表面谐振器。

公开(公告)号：US10439568B2

公开(公告)日：2019-10-08

申请号：US15562982

申请日：2016-03-15

Applicant: Franz Eiermann ,  Ralph Oppelt

Inventor： Franz Eiermann ,  Ralph Oppelt

IPC: H03F3/217 ,  H02J7/00 ,  H02J7/02

Abstract: A transmission amplifier is provided for amplifying the signal in a wire-free transmission system. The transmission amplifier includes a pre-amplifier stage and an amplifier output stage that is coupled to the pre-amplifier stage. The amplifier output stage is configured with gate components and is configured to provide a signal fed in as an amplified output signal on the output side.

公开(公告)号：US10247792B2

公开(公告)日：2019-04-02

申请号：US14716552

申请日：2015-05-19

Applicant: Stephan Biber ,  Ralph Oppelt

Inventor： Stephan Biber ,  Ralph Oppelt

IPC: G01R33/36 ,  G01R33/341

Abstract: A magnetic resonance imaging (MRI) system connection for a magnetic resonance imaging system, such as for an MRI local coil and/or patient couch, is provided. The MRI system connection is embodied with devices for a field-coupled transmission of signals.

公开(公告)号：US20180367108A1

公开(公告)日：2018-12-20

申请号：US15562982

申请日：2016-03-15

Applicant: Franz Eiermann ,  Ralph Oppelt

Inventor： Franz Eiermann ,  Ralph Oppelt

IPC: H03F3/217 ,  H02J7/02

CPC classification number: H03F3/2171 ,  H02J7/025 ,  H03F3/217 ,  H03F3/2178

Abstract: A transmission amplifier is provided for amplifying the signal in a wire-free transmission system. The transmission amplifier includes a pre-amplifier stage and an amplifier output stage that is coupled to the pre-amplifier stage. The amplifier output stage is configured with gate components and is configured to provide a signal fed in as an amplified output signal on the output side.

公开(公告)号：US20170219667A1

公开(公告)日：2017-08-03

申请号：US15422136

申请日：2017-02-01

Applicant: Andreas Fackelmeier ,  Klaus Huber ,  Sebastian Martius ,  Ralph Oppelt ,  Markus Vester

Inventor： Andreas Fackelmeier ,  Klaus Huber ,  Sebastian Martius ,  Ralph Oppelt ,  Markus Vester

IPC: G01R33/36 ,  G01R33/30

CPC classification number: G01R33/3685 ,  G01R33/30

Abstract: A line with a standing wave trap for a magnetic resonance tomograph, and a patient couch and a magnetic resonance tomograph with the line are provided. The line includes a carrier material, a first conductor track that extends along the carrier material in the carrier material or on the carrier material, and a first conductor loop. The first conductor loop is arranged on or in the carrier material. The first conductor loop has a signal coupling to the first conductor track. The first conductor loop has a first interruption that is bridged with a first capacitance.

公开(公告)号：US20160181684A1

公开(公告)日：2016-06-23

申请号：US14972304

申请日：2015-12-17

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H04B3/28

CPC classification number: H01P1/225

Abstract: A device for damping a standing wave on a waveguide carrying a signal is provided. The device includes at least one pair of an impedance-up-transforming and an impedance-down-transforming Boucherot bridge is connected into the waveguide. The two Boucherot bridges bring about locally increased impedances and inductance values, with the result that a significantly improved standing wave suppression or damping is obtained. The down-transforming Boucherot bridge is connected directly behind the up-transforming bridge, with the result that down-transformation to the original impedance of the waveguide again can be carried out and a signal reflection can thus be avoided.

Abstract translation: 提供了一种用于阻尼载波信号的波导上的驻波的装置。 该装置包括至少一对阻抗向上变换和阻抗下变换的Boucherot桥连接到波导中。 两个Boucherot桥梁带来了局部增加的阻抗和电感值，结果是获得显着改善的驻波抑制或阻尼。 下转换的Boucherot桥直接连接在上变换桥后面，结果可以再次向下变换到波导的原始阻抗，从而可以避免信号反射。

公开(公告)号：US20150207653A1

公开(公告)日：2015-07-23

申请号：US14602239

申请日：2015-01-21

Applicant: Ralph Oppelt ,  Michael Wiehl

Inventor： Ralph Oppelt ,  Michael Wiehl

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

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.

Abstract translation: 提供一种用于发送调频信号的发送装置。 发送装置包括用于产生导频音的导频音产生装置。 发送装置还包括用于获得生成的导频音调的调制装置和调制有用信号，并且用于基于所生成的导频音和调制有用信号的组合来生成调频信号。 所产生的导频音具有在调制有用信号的频率范围之外的频率，以便改变调频信号的频率范围。

公开(公告)号：US08526902B2

公开(公告)日：2013-09-03

申请号：US13416769

申请日：2012-03-09

Applicant: Stephan Biber ,  Ralph Oppelt ,  Robert Rehner

Inventor： Stephan Biber ,  Ralph Oppelt ,  Robert Rehner

IPC: H04B7/00

CPC classification number: H04B1/28 ,  H03H7/0115 ,  H03H7/03 ,  H03H7/06 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/42

Abstract: An arrangement for processing a non-symmetrical signal includes an apparatus configured to balance and filter an image frequency of a nominal frequency of the non-symmetrical receiving signal. The apparatus includes a modified Boucherot bridge having a series or parallel oscillating circuit that replaces inductive or capacitive components of a conventional Boucherot bridge, such that the modified Boucherot bridge is in the harmonized state with the image frequency to be faded out and has a predetermined impedance with the nominal frequency on its symmetrical output terminals. The nominal frequency has a predetermined impedance on its symmetrical output terminals. The nominal frequency is transmitted as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge.

Abstract translation: 用于处理非对称信号的装置包括被配置为平衡和过滤非对称接收信号的标称频率的图像频率的装置。 该装置包括具有串联或并联振荡电路的经修改的Boucherot桥，该电路代替常规Boucherot桥的电感或电容分量，使得经修改的Boucherot桥处于协调状态，图像频率将被淡出并具有预定阻抗 标称频率在其对称输出端子上。 标称频率在其对称输出端子上具有预定的阻抗。 标称频率作为平衡到地面的信号传输到改进的Boucherot桥的对称输出端子。

公开(公告)号：US20130063221A1

公开(公告)日：2013-03-14

申请号：US13416769

申请日：2012-03-09

Applicant: Stephan Biber ,  Ralph Oppelt ,  Robert Rehner

Inventor： Stephan Biber ,  Ralph Oppelt ,  Robert Rehner

IPC: H03H7/42

CPC classification number: H04B1/28 ,  H03H7/0115 ,  H03H7/03 ,  H03H7/06 ,  H03H7/175 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H7/42

Abstract: An arrangement for processing a non-symmetrical signal includes an apparatus configured to balance and filter an image frequency of a nominal frequency of the non-symmetrical receiving signal. The apparatus includes a modified Boucherot bridge having a series or parallel oscillating circuit that replaces inductive or capacitive components of a conventional Boucherot bridge, such that the modified Boucherot bridge is in the harmonized state with the image frequency to be faded out and has a predetermined impedance with the nominal frequency on its symmetrical output terminals. The nominal frequency has a predetermined impedance on its symmetrical output terminals. The nominal frequency is transmitted as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge.

Abstract translation: 用于处理非对称信号的装置包括被配置为平衡和过滤非对称接收信号的标称频率的图像频率的装置。 该装置包括具有串联或并联振荡电路的经修改的Boucherot桥，该电路代替常规Boucherot桥的电感或电容分量，使得经修改的Boucherot桥处于协调状态，图像频率将被淡出并具有预定阻抗 标称频率在其对称输出端子上。 标称频率在其对称输出端子上具有预定的阻抗。 标称频率作为平衡到地面的信号传输到改进的Boucherot桥的对称输出端子。

公开(公告)号：US08055196B2

公开(公告)日：2011-11-08

申请号：US12465147

申请日：2009-05-13

Applicant: Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

Inventor： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

IPC: H04B7/00

CPC classification number: G01R33/3664 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/3621 ,  G01R33/3635

Abstract: An arrangement for transmitting magnetic resonance signals, with a transmission link that connects a local coil with a receiver, has a first channel of the local coil with a first single antenna to acquire a first magnetic resonance signal, as well as a first mixer connected with the first single antenna. The first mixer forms an intermediate-frequency first signal from the supplied first magnetic resonance signal. A second channel of the local coil has a second single antenna to acquire a second magnetic resonance signal, as well as a second mixer connected with the second single antenna. The second mixer forms an intermediate-frequency second signal from the supplied second magnetic resonance signal. The local coil has a device for signal combination that, by frequency multiplexing, that combines the intermediate-frequency first signal of the first channel and the intermediate-frequency second signal of the second channel so that it arrives at the receiver via the transmission path. The receiver has an A/D converter at which one of the transmitted intermediate-frequency signals of an associated channel arrives in order to be sampled with a sampling frequency for digitization. For frequency conversion, a first local oscillator frequency is connected at the first mixer and a second local oscillator frequency is connected at the second mixer. the first and second local oscillator frequencies are selected such that intermediate-frequencies formed by the frequency conversion are mirror-symmetrical relative to the sampling frequency of the A/D converter.

Abstract translation: 用于传输磁共振信号的装置，具有将本地线圈与接收器连接的传输链路，具有本地线圈的第一通道和第一单个天线以获取第一磁共振信号，以及与第 第一单天线。 第一混频器从所提供的第一磁共振信号形成中频第一信号。 本地线圈的第二通道具有用于获取第二磁共振信号的第二单个天线，以及与第二单个天线连接的第二混频器。 第二混频器从所提供的第二磁共振信号形成中频第二信号。 本地线圈具有用于信号组合的装置，通过频率复用，组合第一通道的中频第一信号和第二通道的中频第二信号，使得其经由传输路径到达接收器。 接收机具有A / D转换器，在该A / D转换器中，相关信道的所发送的中频信号中的一个到达，以便以用于数字化的采样频率进行采样。 对于频率转换，在第一混频器处连接第一本地振荡器频率，在第二混频器处连接第二本地振荡器频率。 选择第一和第二本地振荡器频率，使得由频率变换形成的中频相对于A / D转换器的采样频率是镜像对称的。