公开(公告)号：US4375621A

公开(公告)日：1983-03-01

申请号：US239759

申请日：1981-03-02

Applicant: Andres F. Schneiter ,  Josef L. Fikart

Inventor： Andres F. Schneiter ,  Josef L. Fikart

IPC: H03B5/18 ,  H03C3/22 ,  H03C3/08

CPC classification number: H03C3/222 ,  H03B5/1847 ,  H03B2200/0024 ,  H03B2200/004 ,  H03B2200/0092

Abstract: In a microstrip frequency modulated oscillator, the linearity of the modulating circuit incorporating a varactor diode is adjusted by using a microstrip transmission line as a secondary resonator in conjuction with a variable reactor. The varactor is connected to one end of this resonator which end is also connected to the main resonator of the microstrip oscillator. The variable reactor is connected between the other end of the secondary resonator and ground.

Abstract translation: 在微带调频振荡器中，通过使用微带传输线作为与可变电抗器结合的二次谐振器来调节并入变容二极管的调制电路的线性度。 变容二极管连接到该谐振器的一端，其端部也连接到微带振荡器的主谐振器。 可变电抗器连接在次谐波器的另一端和地之间。

公开(公告)号：US4399408A

公开(公告)日：1983-08-16

申请号：US239758

申请日：1981-03-02

Applicant: Abram Froese ,  Josef L. Fikart

Inventor： Abram Froese ,  Josef L. Fikart

IPC: G01R23/15 ,  G01R31/28

CPC classification number: G01R23/15 ,  G01R31/2824

Abstract: An APC (automatic phase control) circuit is utilized to measure the linearity of an FMO (frequency modulated oscillator). In accordance with a common APC concept a programmable divider is connected to an output of said frequency modulatable oscillator to produce a binary output signal having a predetermined pulse repetition rate. This signal is compared with a reference oscillator signal in a phase control comparator producing a DC control signal which is applied to the control input of said frequency modulated oscillator to maintain the average oscillator frequency constant. This DC control voltage gives an indication of average free running frequency of the oscillator.To measure linearity, the said binary signal at the programmable divider output is also further divided and processed to produce a low frequency square waveform which is applied via a manual ON/OFF switch and a modulation amplifier to the modulation input of the said FMO. The change in the average free running frequency of the FMO, and the corresponding change in the DC control voltage resulting from alternatively switching the low frequency waveform ON and OFF, is a measure of the FMO's linearity. This change is amplified and a zero center meter is employed to indicate the magnitude and sign of the error, and to permit adjustment to obtain a minimum error indication.

Abstract translation: 使用APC（自动相位控制）电路来测量FMO（调频振荡器）的线性度。 根据普通APC概念，可编程分频器连接到所述频率可调谐振荡器的输出端，以产生具有预定脉冲重复频率的二进制输出信号。 该信号与相位控制比较器中的参考振荡器信号进行比较，产生施加到所述调频振荡器的控制输入的DC控制信号，以保持平均振荡器频率恒定。 该直流控制电压给出了振荡器的平均自由运行频率的指示。 为了测量线性度，可编程分频器输出端的所述二进制信号也被进一步分割和处理，以产生通过手动ON / OFF开关和调制放大器施加到所述FMO的调制输入端的低频方波。 FMO的平均自由运行频率的变化以及交替切换低频波形ON和OFF所产生的DC控制电压的相应变化是FMO线性度的量度。 该变化被放大，并且使用零中心仪表来指示误差的幅度和符号，并且允许调整以获得最小误差指示。

公开(公告)号：US4123730A

公开(公告)日：1978-10-31

申请号：US812890

申请日：1977-07-05

Applicant: Josef L. Fikart

Inventor： Josef L. Fikart

IPC: H01P5/10 ,  H01P3/08

CPC classification number: H01P5/1015 ,  H01P5/1007

Abstract: A novel technique for coupling microwave signals to a slot transmission line and for effecting a simultaneous impedance transformation. One lead of a microwave capacitor, connects to a source of microwave signals via a microstrip or coplanar transmission line. The other capacitor lead, located in the same plane as the slot line, crosses the slot line at a right angle and connects to the ground plane on the other side of the slot. A short-circuited segment of the slot line extends N.lambda./4 beyond the point of crossing where N is an odd integer.

Abstract translation: 一种用于将微波信号耦合到时隙传输线并用于实现同时阻抗变换的新技术。 微波电容器的一个引脚通过微带或共面传输线连接到微波信号源。 位于与槽线相同的平面中的另一个电容器引线以直角与插槽线交叉，并连接到插槽另一侧的接地平面。 狭槽线的短路段将Nλ/ 4延伸超过交叉点，其中N是奇整数。

公开(公告)号：US5434522A

公开(公告)日：1995-07-18

申请号：US117941

申请日：1993-09-08

Applicant: Josef L. Fikart ,  Yongnan Xuan

Inventor： Josef L. Fikart ,  Yongnan Xuan

IPC: H03B19/14 ,  H03B19/16 ,  H03B19/00

CPC classification number: H03B19/14 ,  H03B19/16

Abstract: A microwave frequency doubler circuit, which includes a full wave rectifier for rectifying an input signal and to provide two outputs, and a differential amplifier having inputs connected to the two outputs.

Abstract translation: 一种微波倍频电路，其包括用于整流输入信号并提供两个输出的全波整流器，以及具有连接到两个输出的输入的差分放大器。

公开(公告)号：US4121163A

公开(公告)日：1978-10-17

申请号：US812544

申请日：1977-07-05

Applicant: Josef L. Fikart

Inventor： Josef L. Fikart

IPC: H03B19/00

CPC classification number: H03B19/00

Abstract: A microwave signal generator having improved noise spectral characteristics employs a plurality of amplifier-frequency multiplier circuits in combination with a very stable VHF oscillator. Instead of lumping the amplification and frequency multiplication together, each in a single stage, a plurality of amplifiers and multipliers are interleaved, as described herein, resulting in reduced FM noise generation.

Abstract translation: 具有改进的噪声频谱特性的微波信号发生器采用与非常稳定的VHF振荡器组合的多个放大倍数乘法器电路。 代替将放大和倍频结合在一起，每个在单个级中，多个放大器和乘法器被交织，如本文所述，导致FM噪声产生减少。