-
公开(公告)号：US20180088210A1
公开(公告)日：2018-03-29
申请号：US15691544
申请日：2017-08-30
申请人： THALES
IPC分类号： G01S7/282
摘要： A wave transmitted by an antenna made up of an array of radiating elements, two pulse waves are transmitted, each modulated by a phase shift law known as modulation phase shift, the phase shifts being in opposition, a first wave being transmitted by a sub-array of radiating elements referred to as odd and the second wave being transmitted by a second sub-array of radiating elements referred to as even, the two sub-arrays being interleaved, the transmitted wave being the combination of the first wave and the second wave.
-
公开(公告)号：US20100245160A1
公开(公告)日：2010-09-30
申请号：US12557853
申请日：2009-09-11
申请人： Hiroki Sakurai , Hiroaki Ishihara , Toshiya Mitomo
发明人： Hiroki Sakurai , Hiroaki Ishihara , Toshiya Mitomo
IPC分类号： G01S13/00
CPC分类号： G01S7/4008 , G01S13/345 , H03C3/08 , H03C3/09
摘要： An FMCW signal generation circuit includes: an oscillator configured to oscillate in an oscillation frequency that is variable in accordance with a control signal being input thereto and output an FMCW signal having the oscillation frequency; a phase detector configured to detect a phase of the FMCW signal; a first differentiator configured to obtain a frequency by differentiating the phase detected by the phase detector; a second differentiator configured to obtain a frequency variation rate by differentiating the frequency obtained by the first differentiator; a subtractor configured to calculate an error between a set frequency variation rate that is set at a given value and the frequency variation rate obtained by the second differentiator; and an integrator configured to generate the control signal for controlling the oscillation frequency of the oscillator by integrating the error calculated by the subtractor.
摘要翻译： FMCW信号发生电路包括：振荡器，被配置为以根据输入的控制信号可变的振荡频率振荡，并输出具有振荡频率的FMCW信号; 相位检测器，被配置为检测所述FMCW信号的相位; 第一微分器，被配置为通过对由相位检测器检测到的相位进行微分来获得频率; 第二微分器，被配置为通过区分由第一微分器获得的频率来获得频率变化率; 减法器，被配置为计算设定在给定值的设定频率变化率与由所述第二微分器获得的频率变化率之间的误差; 以及积分器，被配置为通过对由减法器计算的误差进行积分来产生用于控制振荡器的振荡频率的控制信号。
-
3.发明授权公开(公告)号：US07595702B2
公开(公告)日：2009-09-29
申请号：US11822369
申请日：2007-07-05
申请人： Masakatsu Maeda
发明人： Masakatsu Maeda
IPC分类号： H04L27/20
摘要： A modulation apparatus 24 comprises a monitoring section 207 operable to monitor information about a control voltage applied to a VCO 201 as control voltage information, during any period, when a low-frequency signal having a frequency within a loop band of a PLL circuit is input at least before an LPF 209, a correction table storing section 206 operable to associate the control voltage information monitored by the monitoring section 207 as information about a control voltage after correction with information about a control voltage before correction, and store the associated information as a correction table, and a correction section 204 operable to correct a control voltage applied to the VCO 201 based on the correction table stored in the correction table storing section.
-
4.发明授权
公开(公告)号：US5952895A
公开(公告)日：1999-09-14
申请号：US27954
申请日：1998-02-23
CPC分类号： H03C3/0966 , H03C3/08 , H03C3/0941 , H03C3/095 , H03B28/00 , H03C2200/005 , H03C2200/0079
摘要： The present invention, generally speaking, provides an RF modulator that allows precise, stable phase shifts to be obtained. The modulator uses a PLL structure including an auxiliary feedforward path used to inject a baseband modulation signal into the PLL at a point past a loop filter of the PLL. A phase demodulator recovers phase information from the output signal of the PLL. The recovered phase information is compared to the phase information of the baseband modulation signal. A resulting error signal is used to control injection of the baseband modulation signal into the PLL, to automatically achieve the correct "dosage." A precise, adaptive, phase-stable modulator results. The adaptation of the modulator compensates for variability of the VCO and other components of the PLL.
摘要翻译： 本发明一般地提供了一种能够获得精确，稳定的相移的RF调制器。 调制器使用PLL结构，其包括用于在通过PLL的环路滤波器的点将基带调制信号注入到PLL中的辅助前馈路径。 相位解调器从PLL的输出信号中恢复相位信息。 将恢复的相位信息与基带调制信号的相位信息进行比较。 所产生的误差信号用于控制基带调制信号的注入到PLL中，以自动实现正确的“剂量”。 一个精确的，自适应的相位稳定调制器。 调制器的调整补偿了VCO和PLL的其他组件的变化。
-
公开(公告)号：US5838210A
公开(公告)日：1998-11-17
申请号：US980566
申请日：1997-12-01
IPC分类号： H03B19/00 , H03C1/06 , H03C3/08 , H03C5/00 , H03F3/217 , H03K7/08 , H04L5/02 , H04L27/00 , H03K7/10 , H04L27/36
CPC分类号： H04L5/026 , H03C1/06 , H03C3/08 , H03F3/2171 , H03K7/08 , H04L27/00 , H03B19/00 , H03C5/00 , H03D2200/0086 , H03F2200/351 , H03F2200/66
摘要： A method and apparatus for generating a modulated signal include a pulse modulation source (215), a pulse modulator (20) for modulating a pulsed signal, a high efficiency power amplifier (230) for amplifying the modulated pulsed signal, and a harmonic reduction filter (240) for passing the switching frequency of the pulsed signal as the RF carrier. The pulse modulation source (215) accepts baseband inphase and quadrature signals and determines phase values and duty ratios for modulating the pulsed signal. The pulse modulator (20) phase modulates and duty cycle modulates the pulsed signal before it is amplified and filtered. A quadrature demodulator (260) produces baseband inphase and quadrature feedback signals for increased linearity.
摘要翻译： 用于产生调制信号的方法和装置包括脉冲调制源（215），用于调制脉冲信号的脉冲调制器（20），用于放大经调制的脉冲信号的高效率功率放大器（230）和谐波抑制滤波器 （240），用于将脉冲信号的开关频率作为RF载波传递。 脉冲调制源（215）接受基带同相和正交信号，并确定用于调制脉冲信号的相位值和占空比。 脉冲调制器（20）在对其进行放大和滤波之前进行相位调制和占空比调制脉冲信号。 正交解调器（260）产生用于增加线性度的基带同相和正交反馈信号。
-
公开(公告)号：US5694132A
公开(公告)日：1997-12-02
申请号：US796832
申请日：1985-11-12
申请人： Richard W. Johnson
发明人： Richard W. Johnson
CPC分类号： G01S7/35 , G01S7/282 , H03B23/00 , G01S13/343 , H03C3/08
摘要： Apparatus for linearizing the sweep frequency output of an FMCW radar employing a voltage controlled oscillator includes means for comparing a series of reference voltages sequentially with the instantaeous oscillator drive voltge, accumulating the individual resultant error voltages throughout successive sweep cycles, sequentially converting the individual accumulated voltages to exponential form and feeding the exponential voltages back into the drive circuit for the VCO.
摘要翻译： 用于使用压控振荡器对FMCW雷达的扫频输出进行线性化的装置包括用于将一系列参考电压与即时振荡器驱动电压顺序进行比较的装置，在连续的扫描周期中积累各个合成误差电压，顺序地转换各个累积电压 以指数形式并将指数电压馈送回VCO的驱动电路。
-
公开(公告)号：US5642081A
公开(公告)日：1997-06-24
申请号：US548428
申请日：1995-10-26
CPC分类号： G01S7/4008 , H03B23/00 , G01S13/34 , H03C3/08
摘要： The present invention overcomes the problems discussed above by providing a linearizer apparatus for providing a linear ramp modulation for a voltage control oscillator (VCO), including voltage controlled oscillator means (VCO) having input and output terminals, and means for producing the output signal at its output terminal at the output frequency such that the output frequency corresponds to the voltage of a modulated tuning signal applied to the input terminal. A signal division means is coupled to the output of the VCO for producing a divided signal. A glass bulk acoustic delay means is coupled to the signal division means for producing a delayed signal. A first comparison signal generator means is coupled to the divided signal and the delayed signal for producing an IF signal which is proportional to the VCO output signal non-linearities. A reference oscillator means is provided for producing a reference signal. A second comparison signal generator means is coupled to the reference signal and the IF signal for producing an error signal. Finally, a summing means is coupled to a modulation waveform generator means and the error signal for producing a modulated tuning signal which is input to the VCO to frequency modulate the VCO.
摘要翻译： 本发明通过提供一种用于为压控振荡器（VCO）提供线性斜坡调制的线性化装置克服了上述问题，该电压控制振荡器包括具有输入和输出端的压控振荡器装置（VCO），以及用于产生输出信号的装置 其输出端子处于输出频率，使得输出频率对应于施加到输入端子的调制调谐信号的电压。 信号分离装置耦合到VCO的输出端，以产生分频信号。 玻璃体声延迟装置耦合到信号分离装置，用于产生延迟信号。 第一比较信号发生器装置耦合到分频信号和延迟信号，用于产生与VCO输出信号非线性成比例的IF信号。 提供用于产生参考信号的参考振荡器装置。 第二比较信号发生器装置耦合到参考信号和IF信号以产生误差信号。 最后，求和装置耦合到调制波形发生器装置和用于产生调制调谐信号的误差信号，该调制调谐信号被输入到VCO以对VCO进行频率调制。
-
公开(公告)号：US5535247A
公开(公告)日：1996-07-09
申请号：US126479
申请日：1993-09-24
申请人： Paul H. Gailus , Mark A. Gannon , Steven F. Gillig
发明人： Paul H. Gailus , Mark A. Gannon , Steven F. Gillig
CPC分类号： H04L27/2071 , H03C3/08 , H03D7/168 , H04B2001/0491
摘要： A transmitter has an oscillator (101, 201, 303, 401, 501) that operates at frequency k multiplied by f.sub.c, thus the oscillator (101, 201, 303, 401, 501) outputs a signal at an output frequency, kf.sub.c. Coupled to the oscillator (101, 201, 303, 401, 501) is a frequency modifier (103, 205, 307, 405, 505), for modifying the oscillator output frequency by factor 1/k, thereby producing a signal at frequency f.sub.c at the frequency modifier output. Coupled to the frequency modifier output is a modulator (105, 215, 301, 407-417, 507-517) for producing a modulated output signal substantially centered at frequency f.sub.c.
摘要翻译： 发射机具有以频率k乘以fc的振荡器（101,201,303,401,501），因此振荡器（101,201,303,401,501）以输出频率kfc输出信号。 耦合到振荡器（101,201,303,401,501）的是频率修正器（103,205,307,405,505），用于将振荡器输出频率修正因子1 / k，从而产生频率fc的信号 在频率修改器输出。 耦合到频率修改器输出的是用于产生基本上以频率fc为中心的调制输出信号的调制器（105,215,301,407-417,507-517）。
-
公开(公告)号：US4754277A
公开(公告)日：1988-06-28
申请号：US902658
申请日：1986-09-02
申请人： Kenneth G. Voyce
发明人： Kenneth G. Voyce
CPC分类号： G01S13/343 , G01S7/4008 , H03C3/08
摘要： A circuit and method for generating an output signal having an output frequency that varies linearly with time, and an FM CW radar system utilizing such a circuit. The circuit includes a VCO, a rate detector, a phase detector, a filter and an integrator. The VCO produces an output signal at its output terminal at an output frequency that corresponds to the voltage of a tuning signal applied to the VCO input terminal. The rate detector receives the output signal and produces a rate signal having a rate frequency that corresponds to the rate of change of the output frequency. The phase detector compares the rate signal to a reference signal having a fixed frequency, and produces a correction signal corresponding to the phase difference between the rate and reference signals. The filter filters the correction signal to produce a first current signal, and the integrator integrates the first current signal to produce the tuning signal. The circuit may also include a current source for producing a constant magnitude second current signal, in which case the integrator integrates the combined first and second current signals to produce the tuning signal.
摘要翻译： 一种用于产生具有随时间线性变化的输出频率的输出信号的电路和方法，以及利用这种电路的FM CW雷达系统。 电路包括VCO，速率检测器，相位检测器，滤波器和积分器。 VCO在其输出端产生输出信号，输出频率对应于加到VCO输入端的调谐信号的电压。 速率检测器接收输出信号并产生具有对应于输出频率的变化率的速率频率的速率信号。 相位检测器将速率信号与具有固定频率的参考信号进行比较，并产生对应于速率和参考信号之间的相位差的校正信号。 滤波器对校正信号进行滤波以产生第一电流信号，并且积分器对第一电流信号进行积分以产生调谐信号。 电路还可以包括用于产生恒定幅度的第二电流信号的电流源，在这种情况下，积分器对组合的第一和第二电流信号进行积分以产生调谐信号。
-
公开(公告)号：US4675618A
公开(公告)日：1987-06-23
申请号：US871963
申请日：1986-06-09
申请人： Richard A. Cross
发明人： Richard A. Cross
IPC分类号： H03C3/08
CPC分类号： H03C3/08
摘要： A system for frequency modulation by a signal, the system including an oscillator having a known linearity distortion, a circuit for selecting one from a plurality of predetermined constants, a circuit for operating on the signal with the selected constant, and a digital to analog converter in an embodiment where the signal is digital, for converting the signal having been operated on to an analog signal for modulating the oscillator is disclosed. One embodiment includes a circuit for determining the magnitude of the input signal.
摘要翻译： 一种用于通过信号进行频率调制的系统，该系统包括具有已知线性失真的振荡器，用于从多个预定常数中选择一个振荡器的电路，用于对具有选定常数的信号进行操作的电路以及数模转换器 在信号为数字的实施例中，公开了用于将已被操作的信号转换为用于调制振荡器的模拟信号的实施例。 一个实施例包括用于确定输入信号的幅度的电路。
-
-
-
-
-
-
-
-
-
搜索结果
145 条记录 (耗时 0.019 秒)
