Radio frequency power amplifier having variable output power
    31.
    发明授权
    Radio frequency power amplifier having variable output power 失效
    具有可变输出功率的射频功率放大器

    公开(公告)号:US5276912A

    公开(公告)日:1994-01-04

    申请号:US41525

    申请日:1993-04-01

    CPC classification number: H03F1/56 H04B1/0458 H04B2001/0416

    Abstract: A radio-frequency amplifier (50) has an impedance transformation network (66) with a control input (70) for controlling the transformation characteristic of the transformation network (66). The radio-frequency amplifier (50) amplifies an input signal to produce an amplified radio-frequency output signal to a load (68). The control circuit selects a power level for the output signal, in response to a control signal, by transforming the impedance of the load to a transformed impedance at the output of the radio-frequency amplifier, so that the efficiency of the radio-frequency amplifier is not substantially degraded as the power level for the output signal is changed.

    Abstract translation: 射频放大器(50)具有阻抗变换网络(66),其具有用于控制变换网络(66)的变换特性的控制输入(70)。 射频放大器(50)放大输入信号以产生对负载(68)的放大的射频输出信号。 控制电路响应于控制信号,通过将负载的阻抗变换为在射频放大器的输出处的变换阻抗来选择输出信号的功率电平,使得射频放大器的效率 随着输出信号的功率电平发生变化,基本上不会劣化。

    Code division multiplexed acknowledge back paging system
    32.
    发明授权
    Code division multiplexed acknowledge back paging system 失效
    码分多址确认回传系统

    公开(公告)号:US4882579A

    公开(公告)日:1989-11-21

    申请号:US141656

    申请日:1988-01-07

    Inventor: Kazimierz Siwiak

    CPC classification number: H04W84/025 G08B3/1016 H04J13/004 H04J13/18

    Abstract: An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to an group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back signals using different respective pseudorandom codes, a different pseudorandom code being dynamically allocated to each of the pagers in the group.

    Abstract translation: 提供了一种确认(回复)寻呼系统,其包括将一组消息信号发送到作为组寻址的一组回叫寻呼机的中心站。 所寻址的回拨寻呼机组的用户指示对其各自的寻呼机的响应,从而提供回复数据。 所寻址的回拨寻呼机组中的寻呼机然后同时使用不同的各自的伪随机码向中央站发回它们的回复信号,不同的伪随机码被动态地分配给组中的每个寻呼机。

    Frequency division multiplexed acknowledge back paging system
    33.
    发明授权
    Frequency division multiplexed acknowledge back paging system 失效
    频分复用确认回传系统

    公开(公告)号:US4875038A

    公开(公告)日:1989-10-17

    申请号:US141654

    申请日:1988-01-07

    CPC classification number: H04W84/025

    Abstract: An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group.

    Abstract translation: 提供了一种确认(回复)寻呼系统,其包括向作为一组寻址的一组回叫寻呼机的一组消息信号发送的中心站。 所寻址的回拨寻呼机组的用户指示对其各自的寻呼机的响应,从而提供回复数据。 所寻址的回拨寻呼机组中的寻呼机然后同时向中心站发送其在不同频率子带上的回复数据,不同的频率子带被分配给组中的每个寻呼机。

    Microstrip balun-antenna
    34.
    发明授权
    Microstrip balun-antenna 失效
    微带平衡 - 不平衡转换天线

    公开(公告)号:US4847626A

    公开(公告)日:1989-07-11

    申请号:US68510

    申请日:1987-07-01

    CPC classification number: H01Q7/00 H01P5/10

    Abstract: An balun/antenna apparatus is provided which is capable of being fabricated on a printed circuit board substrate by automated equipment. The balun-antenna includes a microstrip groundplane conductor which is split into two balanced ground arms at one end. The split groundplane conductor operates as both a balun and as a radiating conductor. A unique microstrip excitation structure is situated above the split ground elements on the opposed surface of the substrate to excite the antenna with radio frequency energy.

    Abstract translation: 提供一种能够通过自动化设备在印刷电路板基板上制造的平衡 - 不平衡转换/天线装置。 平衡 - 不平衡变换器天线包括微带接地面导体,其一端分为两个平衡的接地臂。 分离的接地面导体作为平衡 - 不平衡变换器和辐射导体工作。 独特的微带激励结构位于衬底的相对表面上的分离接地元件之上,以射频能量激发天线。

    Knowledge back pager with frequency control apparatus
    35.
    发明授权
    Knowledge back pager with frequency control apparatus 失效
    知识回传寻呼机与频率控制装置

    公开(公告)号:US4823123A

    公开(公告)日:1989-04-18

    申请号:US141653

    申请日:1988-01-07

    Inventor: Kazimierz Siwiak

    Abstract: An acknowledge back (ack-back) pager is provide for use in a paging system which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group. The invention provides apparatus for controlling the frequency of the selected sub-band with very high accuracy.

    Abstract translation: 一个回传(回传)寻呼机被提供用于一个寻呼系统,该寻呼系统包括一个中心站,该中心站将一组消息信号发送到作为一组寻址的一组回叫寻呼机。 所寻址的回拨寻呼机组的用户指示对其各自的寻呼机的响应,从而提供回复数据。 所寻址的回拨寻呼机组中的寻呼机然后同时向中心站发送其在不同频率子带上的回复数据,不同的频率子带被分配给组中的每个寻呼机。 本发明提供了以非常高的精度控制所选子带的频率的装置。

    Microstrip balun-antenna apparatus
    36.
    发明授权
    Microstrip balun-antenna apparatus 失效
    微带平衡 - 不平衡转换天线装置

    公开(公告)号:US4737797A

    公开(公告)日:1988-04-12

    申请号:US878898

    申请日:1986-06-26

    CPC classification number: H01P5/10 H01Q9/065

    Abstract: An balun-antenna arrangement is provided which is capable of being fabricated on a printed circuit board by automated equipment. The balun-antenna includes a microstrip transmission line which is coupled to one end of a split microstrip transmission line having opposed ends. An antenna which is symmetric about its feedpoint is coupled to the remaining end of the split microstrip transmission line.

    Abstract translation: 提供了一种能够通过自动化设备在印刷电路板上制造的平衡 - 不平衡变压器天线装置。 平衡 - 不平衡变换器天线包括微带传输线,其连接到具有相对端的分离式微带传输线的一端。 关于其馈电点对称的天线耦合到分离微带传输线的剩余端。

    Space efficient magnetic antenna method
    37.
    发明授权
    Space efficient magnetic antenna method 有权
    空间有效的磁性天线方法

    公开(公告)号:US08922440B2

    公开(公告)日:2014-12-30

    申请号:US12834821

    申请日:2010-07-12

    Abstract: A space efficient magnetic antenna is disclosed for use in tracking, positioning and other applications. In a preferred embodiment, a space efficient magnetic antenna system comprises a first magnetic antenna with a first null axis aligned within a predetermined plane and a second magnetic antenna having a second null axis aligned substantially orthogonal to a first null axis. A second magnetic antenna system lies in a minimal coupling orientation with respect to a first magnetic antenna system. Additionally, a first magnetic antenna may further comprise a plurality of interconnected magnetic antenna elements. A space efficient magnetic antenna system may include an RF module. In further embodiments, the antenna system may enclose a substantial majority of the device including the RF module; the RF module may be enclosed substantially or wholly within one or more antennas of the antenna system.

    Abstract translation: 公开了一种用于跟踪,定位和其他应用的空间高效磁性天线。 在优选实施例中,空间有效的磁性天线系统包括具有在预定平面内对准的第一空轴的第一磁性天线和具有与第一空轴基本正交的第二空轴的第二磁性天线。 第二磁性天线系统位于相对于第一磁性天线系统的最小耦合取向。 另外,第一磁性天线还可以包括多个互连的磁性天线元件。 空间高效的磁性天线系统可以包括RF模块。 在另外的实施例中,天线系统可以包括包括RF模块的设备的绝大多数; RF模块可以基本上或完全地封装在天线系统的一个或多个天线内。

    Wireless communication system and method with elliptically polarized radio frequency signals
    38.
    发明授权
    Wireless communication system and method with elliptically polarized radio frequency signals 有权
    具有椭圆偏振射频信号的无线通信系统和方法

    公开(公告)号:US08553804B2

    公开(公告)日:2013-10-08

    申请号:US13330663

    申请日:2011-12-19

    CPC classification number: H01Q21/24 H01Q21/29 H04B1/71635 H04B1/7176 H04W88/02

    Abstract: In one embodiment, a UWB transmission system includes a pair of crossed linearly polarized antennas, one of which is fed with a UWB signal current, while the second is fed with a temporally orthogonal UWB signal such as the time-derivative of the UWB signal current. The resultant elliptically polarized radiated fields are simultaneously orthogonal in space and orthogonal in time. In another transmission system, a loop and a co-located dipole are fed with the same current to generate signal exhibiting elliptical polarization. When the energies of the transmissions from each antenna are equal, the polarization is circular. Thus a UWB transmitting and receiving system is shown that utilizes signals that are simultaneously spatially orthogonal and temporally orthogonal, and the several combinations of those signal and polarization states encode data for transmission.

    Abstract translation: 在一个实施例中,UWB传输系统包括一对交叉的线性极化天线,其中一个馈送有UWB信号电流,而第二个馈送有时间正交的UWB信号,例如UWB信号电流的时间导数 。 所得到的椭圆偏振辐射场在空间中同时正交并且在时间上正交。 在另一个传输系统中,以相同的电流馈送环路和同位置偶极子,以产生呈现椭圆极化的信号。 当每个天线的传输能量相等时,极化是圆形的。 因此,示出了利用同时在空间上正交和时间正交的信号的UWB发射和接收系统,并且这些信号和极化状态的若干组合对数据进行编码以进行传输。

    Wireless communication system and method with elliptically polarized radio frequency signals
    39.
    发明授权
    Wireless communication system and method with elliptically polarized radio frequency signals 有权
    具有椭圆偏振射频信号的无线通信系统和方法

    公开(公告)号:US08081699B2

    公开(公告)日:2011-12-20

    申请号:US11775211

    申请日:2007-07-09

    CPC classification number: H01Q21/24 H01Q21/29 H04B1/71635 H04B1/7176 H04W88/02

    Abstract: In one embodiment, a UWB transmission system includes a pair of crossed linearly polarized antennas, one of which is fed with a UWB signal current, while the second is fed with a temporally orthogonal UWB signal such as the time-derivative of the UWB signal current. The resultant field is elliptically polarized. In another transmission system, a loop and a co-located dipole are fed with the same current to generate signal exhibiting elliptical polarization. When the energies of the transmissions from each antenna are equal, the polarization is circular. In yet another embodiment, a polarization modulated transmitting and receiving system is disclosed in which the binary states are encoded in orthogonal polarizations, wherein left-handed polarization encodes one digital state while right-handed polarization encodes another digital data state, and data encoding is additionally provided. Since either one circular polarization state can be generated with both UWB pulses flipped in polarity, a Polarization Orthogonal Keying (POK) modulation, of 4-state per symbol in the two orthogonal polarizations is disclosed as one example. Thus a UWB transmitting and receiving system is shown that utilizes signals that are simultaneously spatially orthogonal and temporally orthogonal, and the several combinations of those signal and polarization states encode data for transmission.

    Abstract translation: 在一个实施例中,UWB传输系统包括一对交叉的线性极化天线,其中一个馈送有UWB信号电流,而第二个馈送有时间正交的UWB信号,例如UWB信号电流的时间导数 。 所得到的场是椭圆极化的。 在另一个传输系统中,以相同的电流馈送环路和同位置偶极子,以产生呈现椭圆极化的信号。 当每个天线的传输能量相等时,极化是圆形的。 在另一个实施例中,公开了一种偏振调制的发射和接收系统,其中二进制状态以正交偏振编码,其中左手偏振编码一个数字状态,而右旋偏振编码另一数字数据状态,并且附加地进行数据编码 提供。 由于可以通过极性翻转的两个UWB脉冲产生一个圆偏振状态,因此公开了两个正交偏振中的每个符号的4态的极化正交键控(POK)调制作为一个示例。 因此,示出了利用同时在空间上正交和时间正交的信号的UWB发射和接收系统,并且这些信号和极化状态的若干组合对数据进行编码以进行传输。

    Ultra-wideband high data-rate communication apparatus and methods
    40.
    发明授权
    Ultra-wideband high data-rate communication apparatus and methods 失效
    超宽带高数据速率通信装置及方法

    公开(公告)号:US07394846B2

    公开(公告)日:2008-07-01

    申请号:US11712099

    申请日:2007-02-28

    Inventor: Kazimierz Siwiak

    Abstract: An RF transmitter includes a reference signal generator, a signal generator, and a mixer. The reference signal generator provides a reference signal that has a prescribed or desired frequency. The signal generator provides an operating signal in response to a selection signal. The operating signal has a frequency that equals the frequency of the reference signal multiplied by a number. The mixer mixes the operating signal with another signal to generate a transmission signal. An RF receiver includes a first mixer, a second mixer, an integrator/sampler, and a signal generator. The first mixer receives as its inputs an input RF signal and a second input signal, and mixes its input signals to generate a mixed signal. The integrator/sampler receives the mixed signal and processes it to provide an output signal. The signal generator provides an operating signal in response to a selection signal. The operating signal has a frequency equal to the frequency of a reference signal, multiplied by a number. The second mixer mixes the operating signal with a template signal to generate the second input signal of the first mixer.

    Abstract translation: RF发射机包括参考信号发生器,信号发生器和混频器。 参考信号发生器提供具有规定或期望频率的参考信号。 信号发生器响应于选择信号提供操作信号。 操作信号的频率等于参考信号的频率乘以一个数字。 混合器将操作信号与另一个信号混合以产生传输信号。 RF接收机包括第一混频器,第二混频器,积分器/采样器和信号发生器。 第一混频器作为其输入接收输入RF信号和第二输入信号,并且混合其输入信号以产生混合信号。 积分器/采样器接收混合信号并处理它以提供输出信号。 信号发生器响应于选择信号提供操作信号。 操作信号的频率等于参考信号的频率乘以一个数字。 第二混合器将操作信号与模板信号混合以产生第一混频器的第二输入信号。

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