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公开(公告)号：US5802452A
公开(公告)日：1998-09-01
申请号：US587411
申请日：1996-01-17
CPC分类号： H04B7/15528
摘要： A multiple channel radio frequency repeater has a receive port for receiving an input signal from a first antenna and a transmit port for transmitting a frequency shifted output signal to a second antenna. An input bandpass filter is located at the input port. A low noise amplifier follows the input bandpass filter for amplifying all signals within the input bandwidth. A plurality of channel filters divide the input signal into a plurality of channel signals. A local oscillator generates a local oscillator (LO) signal. There is a mixer corresponding to each channel, each mixer has an input port, an output put port and an LO port. The LO port is coupled to the local oscillator. An Automatic Gain Control (AGC) amplifier is between each channel filter and each mixer for adjusting the channel signal level to the mixer input port to assure that each mixer has the same level amplified channel signal. The LO signal is mixed with the amplified channel signal at the mixer input port to shift the frequency of the amplified channel signal at the mixer input port to an output frequency at the mixer output port. An output bandpass filter between the output ports of the mixers and the repeater output port for combines and couples the plurality of frequency shifted channel signals to the repeater output port.
摘要翻译： 多频道射频中继器具有用于从第一天线接收输入信号的接收端口和用于将频移输出信号发送到第二天线的发送端口。 输入带通滤波器位于输入端口。 低噪声放大器跟随输入带通滤波器，用于放大输入带宽内的所有信号。 多个信道滤波器将输入信号划分为多个信道信号。 本地振荡器产生本地振荡器（LO）信号。 每个通道都有一个混频器，每个混频器都有一个输入端口，一个输出端口和一个LO端口。 LO端口耦合到本地振荡器。 每个通道滤波器和每个混频器之间的自动增益控制（AGC）放大器用于调整到混频器输入端口的信道信号电平，以确保每个混频器具有相同电平的放大信道信号。 LO信号与混频器输入端口处的放大信道信号混合，将混频器输入端口的放大信道信号的频率移动到混频器输出端口的输出频率。 在混频器的输出端口和中继器输出端口之间的输出带通滤波器，用于将多个频移信道信号组合并耦合到中继器输出端口。
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公开(公告)号：US10819321B1
公开(公告)日：2020-10-27
申请号：US16454891
申请日：2019-06-27
摘要： Disclosed is a phase shifter capable of achieving 360° phase shifts. The phase shifter includes an active balanced-to-unbalanced (balun) circuit for splitting an input signal into two signals offset in phase. The phase shifter further includes an active all-pass network electrically coupled to an output of the active balun circuit. The active all-pass network can include an active tunable inductor. A variable-gain amplifier (VGA) is electrically coupled to an output of the active all-pass network.
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公开(公告)号：US08922452B1
公开(公告)日：2014-12-30
申请号：US14221467
申请日：2014-03-21
IPC分类号： H01Q1/36
摘要： In one embodiment, a periodic spiral antenna includes first and second arms that form interleaved spirals parallel to an x-y plane, wherein the arms have a height dimension that extends along a z direction that is perpendicular to the x-y plane, and wherein the interleaved spirals form multiple turns of the antenna, the turns being equally spaced from each other throughout the antenna.
摘要翻译： 在一个实施例中，周期性螺旋天线包括第一和第二臂，其形成平行于xy平面的交错螺旋，其中臂具有沿垂直于xy平面的az方向延伸的高度尺寸，并且其中交错螺旋形成多个 天线的匝数，匝在整个天线彼此相等间隔。
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公开(公告)号：US08629811B2
公开(公告)日：2014-01-14
申请号：US13233411
申请日：2011-09-15
IPC分类号： H01Q1/00
CPC分类号： H01Q1/38 , H01Q5/40 , H01Q7/005 , H01Q9/0421 , H01Q9/0442
摘要： An electrically small dual-band planar tunable UHF/L-Band antenna. In one example, the dual-band antenna includes a combination of a semi-spiral antenna for the UHF frequencies and a microstrip patch antenna for the L-band frequencies.
摘要翻译： 电子小型双频带平面可调UHF / L波段天线。 在一个示例中，双频天线包括用于UHF频率的半螺旋天线和用于L频带频率的微带贴片天线的组合。
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公开(公告)号：US20130069838A1
公开(公告)日：2013-03-21
申请号：US13233411
申请日：2011-09-15
CPC分类号： H01Q1/38 , H01Q5/40 , H01Q7/005 , H01Q9/0421 , H01Q9/0442
摘要： An electrically small dual-band planar tunable UHF/L-Band antenna. In one example, the dual-band antenna includes a combination of a semi-spiral antenna for the UHF frequencies and a microstrip patch antenna for the L-band frequencies.
摘要翻译： 电子小型双频带平面可调UHF / L波段天线。 在一个示例中，双频天线包括用于UHF频率的半螺旋天线和用于L频带频率的微带贴片天线的组合。
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