公开(公告)号：US06690247B2

公开(公告)日：2004-02-10

申请号：US09245609

申请日：1999-02-05

申请人： Mark Kintis ,  Daniel K. Ko ,  Flavia S. Fong ,  Stephen A. Maas

发明人： Mark Kintis ,  Daniel K. Ko ,  Flavia S. Fong ,  Stephen A. Maas

IPC分类号： H03K336

CPC分类号： H03K5/12 ,  H03K5/156

摘要： A nonlinear transmission-line waveform generator for generating a comb of frequencies and relatively short duration pulses, for example, in the range of picoseconds and tens of picoseconds, that are adapted to being utilized with ultra wideband radios in order to improve the bandwidth of such radios by an order of magnitude, for example, up to tens and even hundreds of GHz. In particular, the nonlinear transmission line waveform generator in accordance with the present invention consists of a microstrip or coplanar waveguide line. In accordance with an important aspect of the invention, the &Dgr;C/&Dgr;V characteristic of the nonlinear transmission line is matched to the frequency and amplitude of the input sinusoidal waveform. By matching the &Dgr;C/&Dgr;V characteristics of the nonlinear transmission line to the input sinusoidal waveform, the output of the nonlinear transmission line produces a comb of frequencies that are multiples of the input sinusoidal waveform frequency, making it suitable as a harmonic generator. The nonlinear transmission line can also be used to generate relatively short duration pulses by disposing a shorting stub at the output. The shorting stub causes the waveform to be reflected 180° out of phase so that it cancels the trailing edge of the original output from the nonlinear transmission lines to form a short duration pulse in the picosecond range. The length of the stub determines the width of the resultant output pulse.

摘要翻译： 一种非线性传输线波形发生器，用于产生适于与超宽带无线电一起使用的频率梳和相对较短持续时间的脉冲，例如在皮秒和几十皮秒的范围内，以便改善这样的带宽 无线电台的数量级，例如达数十甚至数百GHz。 特别地，根据本发明的非线性传输线波形发生器由微带或共面波导线组成。 根据本发明的重要方面，非线性传输线的DeltaC / DeltaV特性与输入正弦波形的频率和幅度相匹配。 通过将非线性传输线的DeltaC / DeltaV特性与输入正弦波形匹配，非线性传输线的输出产生的频率梳是输入正弦波形频率的倍数，使其适合作为谐波发生器。 非线性传输线还可用于通过在输出端设置短路短截线来产生相对短的持续时间脉冲。 短路短线使得波形相位反射180°，从而抵消来自非线性传输线的原始输出的后沿，以在皮秒范围内形成短持续时间脉冲。 短截线的长度确定所得输出脉冲的宽度。

公开(公告)号：US06320480B1

公开(公告)日：2001-11-20

申请号：US09426619

申请日：1999-10-26

申请人： Mark Kintis ,  Daniel K. Ko ,  Stephen A. Maas

发明人： Mark Kintis ,  Daniel K. Ko ,  Stephen A. Maas

IPC分类号： H04B304

CPC分类号： H01P1/18

摘要： A programmable phase shifter (20, 40, 54, 60, 62) includes a variable delay line formed from a nonlinear transmission line (NLTL) (26, 28, 46, 28), which enables the device to be used in applications where the frequency of the input signal varies. A variable DC bias applied to the NLTL (26, 28, 46, 48) varies the NLTL's phase velocity and delay. Since the characteristic impedance of a transmission line changes as a function of the DC bias, the input voltage standing wave ratio (VSWR) also changes. In order to compensate for the change in the input VSWR, a pair of NLTLs (26, 28, 46, 48) are coupled at the input and output to a pair of hybrid couplers (22, 42). In an alternate embodiment of the invention, the hybrid couplers (22, 24) are replaced with 180° power splitters (42, 44) in order to reduce distortion of the device. In other embodiments of the invention (40, 54), a nonlinear transmission lines are used to form both discretely variable and continuously variable digital phase shifters (60, 62).

摘要翻译： 可编程移相器（20,40,54,60,62）包括由非线性传输线（NLBT）（26,28,46,28）形成的可变延迟线，其使得该器件能够用于 输入信号的频率变化。 施加到NLTL（26,28,46,48）的可变直流偏置改变了NLTL的相速度和延迟。 由于传输线的特性阻抗随着直流偏置而变化，所以输入电压驻波比（VSWR）也发生变化。 为了补偿输入VSWR的变化，一对NLTL（26,28,46,48）在输入和输出端耦合到一对混合耦合器（22,42）。 在本发明的替代实施例中，混合耦合器（22,24）被替换为180°功率分配器（42,44），以便减少装置的失真。 在本发明的其它实施例中，使用非线性传输线来形成离散变量和连续可变的数字移相器（60,62）。

公开(公告)号：US5596325A

公开(公告)日：1997-01-21

申请号：US499727

申请日：1995-07-07

申请人： Stephen A. Maas

发明人： Stephen A. Maas

IPC分类号： G01S7/03 ,  G01S7/288 ,  G01S13/34 ,  G01S13/56 ,  G01S13/93 ,  G01S13/58 ,  G01S13/62

CPC分类号： G01S13/34 ,  G01S13/56 ,  G01S7/032 ,  G01S7/036 ,  G01S2007/2886 ,  G01S2013/9364 ,  G01S2013/9378

摘要： An FM-CW radar transceiver comprising an oscillator connected to an input of a power divider having first and second terminal outputs. The first terminal output of the power divider is connected to an input of a first diode and a first shorted stub. The second terminal output of the power divider is connected to an input of a phase shifter with the output of the phase shifter connected to an input of a second diode and a second shorted stub. The outputs of the first and second diodes are each connected to inputs of first and second intermediate frequency (IF) filters and then through first and second IF blocking structures terminating at a common antenna port. An open stub is connected to the common antenna port with the outputs of the first and second IF filters each connected to an IF port or channel. In use, the FM-CW transceiver operates as a frequency multiplier for transmitting, and simultaneously as a subharmonically pumped "I/Q" mixer for reception.

摘要翻译： FM-CW雷达收发器包括连接到具有第一和第二终端输出的功率分配器的输入的振荡器。 功率分配器的第一端子输出端连接到第一二极管和第一短路短路的输入端。 功率分配器的第二端子输出端连接到移相器的输入端，移相器的输出端连接到第二二极管和第二短路端子的输入端。 第一和第二二极管的输出各自连接到第一和第二中频（IF）滤波器的输入，然后通过终止于公共天线端口的第一和第二IF阻塞结构。 打开的短截线连接到公共天线端口，其中第一和第二IF滤波器的输出分别连接到IF端口或信道。 在使用中，FM-CW收发器作为用于发送和同时作为用于接收的次谐波泵浦“I / Q”混频器的倍频器。

公开(公告)号：US4949398A

公开(公告)日：1990-08-14

申请号：US204334

申请日：1988-06-09

申请人： Stephen A. Maas

发明人： Stephen A. Maas

IPC分类号： H03D7/12 ,  H03D7/14 ,  H03D9/06

CPC分类号： H03D9/0675 ,  H03D2200/0023 ,  H03D2200/0043 ,  H03D2200/0074 ,  H03D2200/0088 ,  H03D2200/009 ,  H03D7/125 ,  H03D7/14

摘要： A simple balanced-mixer circuit that uses the resistive channel of a GaAs MESFET exhibits superior intermodulation performance, with other performance parameters, e.g., conversion loss, port impedances, and LO sensitivity, being equal to or better than other diode mixers.

摘要翻译： 使用GaAs MESFET的电阻通道的简单的平衡混频器电路表现出优异的互调性能，其他性能参数，例如转换损耗，端口阻抗和LO灵敏度等于或优于其他二极管混频器。