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公开(公告)号：US08421461B2
公开(公告)日：2013-04-16
申请号：US12753159
申请日：2010-04-02
申请人： Peter Cork , Anthony Peter Hulbert
发明人： Peter Cork , Anthony Peter Hulbert
CPC分类号： G01R33/3692 , G01R33/3415 , H03F7/04
摘要： A magnetic resonance imaging system upconverter stage has a number of local coils and a number of upconverters to receive a signal from an output of each coil. Each upconverter has a number of two port upconverter cores, each core having a first port to receive a signal from a local coil and a second port to output an upconverted signal at upper and lower sideband frequencies through an antenna coupled to the second port. The inputs of the plurality of upconverter cores are connected in parallel, and at least one antenna is associated with the second port of each core.
摘要翻译： 磁共振成像系统上变频器级具有多个局部线圈和多个上变频器，以从每个线圈的输出接收信号。 每个上变频器具有多个两端口上变频器内核，每个磁芯具有接收来自本地线圈的信号的第一端口和第二端口，以通过耦合到第二端口的天线在上和下边带频率处输出上变频信号。 多个上变频器核的输入并联连接，并且至少一个天线与每个核心的第二端口相关联。
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公开(公告)号：US08129992B2
公开(公告)日：2012-03-06
申请号：US12613004
申请日：2009-11-05
申请人： Peter Cork , David William Huish , Markus Vester
发明人： Peter Cork , David William Huish , Markus Vester
IPC分类号： G01V3/00
CPC分类号： G01R33/345 , G01R33/34007 , G01R33/3415 , G01R33/3453 , G01R33/3692
摘要： A wireless magnetic resonance imaging (MRI) scanner bore tube assembly has a radio frequency (RF) antenna, a microwave antenna array and an electrical screen. The RF antenna is formed of a series of RF antenna elements, each comprising a rung. The rungs are spaced at intervals of substantially half of the wavelength of the frequency of operation of the microwave antenna array. The microwave antenna array is formed by a series of microwave antenna elements interleaved between the rungs and the screen acts as a reflector to reflect signals from the microwave antenna elements towards the center of the bore tube.
摘要翻译： 无线磁共振成像（MRI）扫描仪钻管组件具有射频（RF）天线，微波天线阵列和电屏。 RF天线由一系列RF天线元件形成，每个RF天线元件包括梯级。 梯级以微波天线阵列的工作频率的波长的大致一半的间隔隔开。 微波天线阵列由在梯级和屏幕之间交错的一系列微波天线元件形成，用作反射器，以将来自微波天线元件的信号反射向钻孔管的中心。
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公开(公告)号：US20100117652A1
公开(公告)日：2010-05-13
申请号：US12613004
申请日：2009-11-05
申请人： Peter Cork , David William Huish , Markus Vester
发明人： Peter Cork , David William Huish , Markus Vester
CPC分类号： G01R33/345 , G01R33/34007 , G01R33/3415 , G01R33/3453 , G01R33/3692
摘要： A wireless magnetic resonance imaging (MRI) scanner bore tube assembly has a radio frequency (RF) antenna, a microwave antenna array and an electrical screen. The RF antenna is formed of a series of RF antenna elements, each comprising a rung. The rungs are spaced at intervals of substantially half of the wavelength of the frequency of operation of the microwave antenna array. The microwave antenna array is formed by a series of microwave antenna elements interleaved between the rungs and the screen acts as a reflector to reflect signals from the microwave antenna elements towards the centre of the bore tube.
摘要翻译： 无线磁共振成像（MRI）扫描仪钻管组件具有射频（RF）天线，微波天线阵列和电屏。 RF天线由一系列RF天线元件形成，每个RF天线元件包括梯级。 梯级以微波天线阵列的工作频率的波长的大致一半的间隔隔开。 微波天线阵列由在梯级和屏幕之间交错的一系列微波天线元件形成，用作反射器，以将来自微波天线元件的信号反射向钻孔管的中心。
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公开(公告)号：US20110059716A1
公开(公告)日：2011-03-10
申请号：US12874706
申请日：2010-09-02
申请人： Peter Cork
发明人： Peter Cork
IPC分类号： H04B1/26
CPC分类号： H03F7/04 , G01R33/3415 , G01R33/3692
摘要： A hybrid upconverter has a low noise amplifier and a two port parametric amplifier. The parametric amplifier has a first port to receive an input signal to be amplified and upconverted and a second port to receive a local oscillator signal and to output the amplified, upconverted signal at upper and lower sideband frequencies. The parametric amplifier further has an antenna coupled to the second port to receive the local oscillator signal and transmit the amplified, upconverted signal at upper and lower sideband frequencies. The low noise amplifier drives the first port of the parametric amplifier. The two port parametric amplifier has a pair of varactor diodes connected between the first port and the second port. The diodes are connected in parallel from the first port and in series from the second port. The low noise amplifier is connected directly to the pair of varactor diodes.
摘要翻译： 混合上变频器具有低噪声放大器和双端口参数放大器。 参数放大器具有用于接收要放大和上变频的输入信号的第一端口和用于接收本地振荡器信号的第二端口，并在上侧和下侧频带频率处输出经放大的上变频信号。 参数放大器还具有耦合到第二端口的天线以接收本地振荡器信号，并且在上边和下边带频率处发送放大的上变频信号。 低噪声放大器驱动参数放大器的第一个端口。 两端口参数放大器具有连接在第一端口和第二端口之间的一对变容二极管。 二极管与第一端口并联连接并与第二端口串联连接。 低噪声放大器直接连接到一对变容二极管。
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公开(公告)号：US08638102B2
公开(公告)日：2014-01-28
申请号：US12753132
申请日：2010-04-02
申请人： Peter Cork , Anthony Peter Hulbert , John Hunt
发明人： Peter Cork , Anthony Peter Hulbert , John Hunt
IPC分类号： G01V3/00
CPC分类号： G01R33/3692 , H03F7/04
摘要： A parametric amplifier device has a two port parametric amplifier, a DC voltage generator and a DC bias regulator. The bias regulator has a voltage regulator, an attenuator and a summer. Output voltages from the regulator and the attenuator are added in the summer.
摘要翻译： 参数放大器器件具有两端参数放大器，直流电压发生器和直流偏置调节器。 偏置调节器具有电压调节器，衰减器和夏季。 调节器和衰减器的输出电压在夏季加入。
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公开(公告)号：US08415953B2
公开(公告)日：2013-04-09
申请号：US12874706
申请日：2010-09-02
申请人： Peter Cork
发明人： Peter Cork
IPC分类号： G01V3/00
CPC分类号： H03F7/04 , G01R33/3415 , G01R33/3692
摘要： A hybrid upconverter has a low noise amplifier and a two port parametric amplifier. The parametric amplifier has a first port to receive an input signal to be amplified and upconverted and a second port to receive a local oscillator signal and to output the amplified, upconverted signal at upper and lower sideband frequencies. The parametric amplifier further has an antenna coupled to the second port to receive the local oscillator signal and transmit the amplified, upconverted signal at upper and lower sideband frequencies. The low noise amplifier drives the first port of the parametric amplifier. The two port parametric amplifier has a pair of varactor diodes connected between the first port and the second port. The diodes are connected in parallel from the first port and in series from the second port. The low noise amplifier is connected directly to the pair of varactor diodes.
摘要翻译： 混合上变频器具有低噪声放大器和双端口参数放大器。 参数放大器具有用于接收要放大和上变频的输入信号的第一端口和用于接收本地振荡器信号的第二端口，并在上侧和下侧频带频率处输出放大的上变频信号。 参数放大器还具有耦合到第二端口的天线以接收本地振荡器信号，并且在上边和下边带频率处发送放大的上变频信号。 低噪声放大器驱动参数放大器的第一个端口。 两端口参数放大器具有连接在第一端口和第二端口之间的一对变容二极管。 二极管与第一端口并联连接并与第二端口串联连接。 低噪声放大器直接连接到一对变容二极管。
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公开(公告)号：US08283927B2
公开(公告)日：2012-10-09
申请号：US12612831
申请日：2009-11-05
申请人： Peter Cork , Sebastian Martius , Markus Vester
发明人： Peter Cork , Sebastian Martius , Markus Vester
IPC分类号： G01V3/00
CPC分类号： G01R33/3692 , G01R33/3415 , G01R33/3621 , H03F7/04
摘要： A two port parametric amplifier has a first port that receives an input signal to be amplified and upconverted and a second port that receives a local oscillator signal. The amplified upconverted input signal is emitted as an output at upper and lower sideband frequencies. The amplifier further has a pair of varactor diodes connected between the first port and the second port. The diodes are connected in parallel from the first port and in series from the second port.
摘要翻译： 双端口参数放大器具有接收要放大和上变频的输入信号的第一端口和接收本地振荡器信号的第二端口。 放大的上变频输入信号作为上边带和下边带频率处的输出发射。 放大器还具有连接在第一端口和第二端口之间的一对变容二极管。 二极管与第一端口并联连接并与第二端口串联连接。
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公开(公告)号：US20100253349A1
公开(公告)日：2010-10-07
申请号：US12753132
申请日：2010-04-02
申请人： Peter Cork , Anthony Peter Hulbert , John Hunt
发明人： Peter Cork , Anthony Peter Hulbert , John Hunt
CPC分类号： G01R33/3692 , H03F7/04
摘要： A parametric amplifier device has a two port parametric amplifier, a DC voltage generator and a DC bias regulator. The bias regulator has a voltage regulator, an attenuator and a summer. Output voltages from the regulator and the attenuator are added in the summer.
摘要翻译： 参数放大器器件具有两端参数放大器，直流电压发生器和直流偏置调节器。 偏置调节器具有电压调节器，衰减器和夏季。 调节器和衰减器的输出电压在夏季加入。
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公开(公告)号：US20100253353A1
公开(公告)日：2010-10-07
申请号：US12753159
申请日：2010-04-02
申请人： Peter Cork , Anthony Peter Hulbert
发明人： Peter Cork , Anthony Peter Hulbert
IPC分类号： G01R33/44
CPC分类号： G01R33/3692 , G01R33/3415 , H03F7/04
摘要： A magnetic resonance imaging system upconverter stage has a number of local coils and a number of upconverters to receive a signal from an output of each coil. Each upconverter has a number of two port upconverter cores, each core having a first port to receive a signal from a local coil and a second port to output an upconverted signal at upper and lower sideband frequencies through an antenna coupled to the second port. The inputs of the plurality of upconverter cores are connected in parallel, and at least one antenna is associated with the second port of each core.
摘要翻译： 磁共振成像系统上变频器级具有多个局部线圈和多个上变频器，以从每个线圈的输出接收信号。 每个上变频器具有多个两端口上变频器内核，每个磁芯具有接收来自本地线圈的信号的第一端口和第二端口，以通过耦合到第二端口的天线在上和下边带频率处输出上变频信号。 多个上变频器核的输入并联连接，并且至少一个天线与每个核心的第二端口相关联。
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公开(公告)号：US20100117650A1
公开(公告)日：2010-05-13
申请号：US12612831
申请日：2009-11-05
申请人： Peter Cork , Sebastian Martius , Markus Vester
发明人： Peter Cork , Sebastian Martius , Markus Vester
CPC分类号： G01R33/3692 , G01R33/3415 , G01R33/3621 , H03F7/04
摘要： A two port parametric amplifier has a first port that receives an input signal to be amplified and upconverted and a second port that receives a local oscillator signal. The amplified upconverted input signal is emitted as an output at upper and lower sideband frequencies. The amplifier further has a pair of varactor diodes connected between the first port and the second port. The diodes are connected in parallel from the first port and in series from the second port.
摘要翻译： 双端口参数放大器具有接收要放大和上变频的输入信号的第一端口和接收本地振荡器信号的第二端口。 放大的上变频输入信号作为上边和下边带频率处的输出发射。 放大器还具有连接在第一端口和第二端口之间的一对变容二极管。 二极管与第一端口并联连接并与第二端口串联连接。
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