公开(公告)号：US08493154B1

公开(公告)日：2013-07-23

申请号：US13284722

申请日：2011-10-28

Applicant: Edmar Camargo ,  Hyung Mo Yoo ,  Seokho Bang

Inventor： Edmar Camargo ,  Hyung Mo Yoo ,  Seokho Bang

IPC: H03F3/04

CPC classification number: H03F1/223 ,  H03F1/3205 ,  H03F1/342 ,  H03F1/565 ,  H03F3/193 ,  H03F3/195 ,  H03F2200/121 ,  H03F2200/141 ,  H03F2200/144

Abstract: A cascode amplifier circuit having substantial linearity, while maintaining other advantages of cascode amplifiers such as relatively high input-to-output isolation and relatively high gain. The cascode amplifier circuit also provides substantially matched impedance between input and output, at least within a selected frequency band, with the effect of providing a circuit that is well-suited for use in a communication system. The cascode amplifier circuit includes feedback loops, such as for example DC feedback loops and AC feedback loops, and bias optimization, with the effect of improving linearity, maintaining gain, minimizing return loss, and providing a relatively high dynamic range.

Abstract translation: 具有大量线性度的共源共栅放大器电路，同时保持共源共栅放大器的其它优点，例如相对高的输入输出隔离度和相对较高的增益。 至少在选定的频带内，共源共栅放大器电路还在输入和输出之间提供基本上匹配的阻抗，其效果是提供非常适合于在通信系统中使用的电路。 共源共栅放大器电路包括反馈回路，例如DC反馈环路和AC反馈回路以及偏置优化，具有改善线性度，保持增益，最小化回波损耗以及提供相对高的动态范围的效果。

公开(公告)号：US06822528B2

公开(公告)日：2004-11-23

申请号：US09976569

申请日：2001-10-11

Applicant: Debasis Dawn ,  Edmar Camargo ,  Yoji Ohashi

Inventor： Debasis Dawn ,  Edmar Camargo ,  Yoji Ohashi

IPC: H01P5107

CPC classification number: H01P5/107

Abstract: Disclosed are planar structures for coupling electromagnetic signals between planar transmission lines and waveguides. A preferred exemplary structure comprises a shielded patch antenna and one or more capacitive diaphragms disposed adjacent to the patch antenna. This structure is advantageous to MMIC modules in connecting from a planar transmission line of a substrate carrying an MMIC to an external waveguide without the need of a non-planar back metal short, which is normally essential to avoid back scattering from the waveguide and also normally needed to achieve impedance matching. In structures according to the present invention, a patch antenna radiates into the waveguide while the antenna's ground plane reduces back scattering from the waveguide. The one or more capacitive diaphragms provide impedance matching between the microstrip and the waveguide.

Abstract translation: 公开了用于在平面传输线和波导之间耦合电磁信号的平面结构。 优选的示例性结构包括屏蔽贴片天线和邻近贴片天线设置的一个或多个电容性隔膜。 这种结构对于从承载MMIC的衬底的平面传输线连接到外部波导的MMIC模块是有利的，而不需要非平面背面金属短，这通常对于避免从波导的反向散射是必需的，并且通常 需要实现阻抗匹配。 在根据本发明的结构中，贴片天线辐射到波导中，而天线的接地平面减小了从波导的反向散射。 一个或多个电容隔膜提供微带与波导之间的阻抗匹配。

公开(公告)号：US5903827A

公开(公告)日：1999-05-11

申请号：US575719

申请日：1995-12-20

Applicant: Wayne Kennan ,  Edmar Camargo

Inventor： Wayne Kennan ,  Edmar Camargo

IPC: H03D7/00 ,  H01P5/22 ,  H03D7/12 ,  H03D7/14 ,  H03D9/06 ,  H04B7/185 ,  H04B1/26

CPC classification number: H01P5/222 ,  H03D9/0675 ,  H04B7/18523 ,  H01L2224/05553 ,  H01L2224/05554 ,  H01L2224/0603 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2924/01079 ,  H01L2924/1423 ,  H01L2924/19041 ,  H01L2924/19107 ,  H01L2924/30107 ,  H01L2924/3011 ,  H03D2200/0003 ,  H03D2200/0023 ,  H03D2200/009 ,  H03D7/125 ,  H03D7/14

Abstract: A monolithic microwave integrated circuit (MMIC) semiconductor chip, for use with a hybrid coupler, in a frequency downconverter. The chip has a first input lead for receiving a first combined input signal from the coupler, a second input lead for receiving a second combined input signal from the coupler, and an output lead. Each input signal is a microwave signal combined with a further frequency signal, and one of the microwave and further frequency signals of the first combined signal is out of phase with one of the microwave and further frequency signals of the second combined signal. A single balanced mixer has a first single ended mixer for converting the first combined signal to a first intermediate frequency signal and a second single ended mixer for converting the second combined signal to a second intermediate frequency signal. An amplifier is coupled to the first and second mixers for forming an amplified unbalanced intermediate frequency (IF) signal at the output lead representative of the first and second intermediate frequency signals.

Abstract translation: 用于频率下变频器的单片微波集成电路（MMIC）半导体芯片，用于混合耦合器。 芯片具有用于从耦合器接收第一组合输入信号的第一输入引线，用于从耦合器接收第二组合输入信号的第二输入引线和输出引线。 每个输入信号是与另一频率信号组合的微波信号，并且第一组合信号的微波和其它频率信号中的一个与第二组合信号的微波和其它频率信号中的一个异相。 单个平衡混频器具有用于将第一组合信号转换为第一中频信号的第一单端混频器和用于将第二组合信号转换为第二中频信号的第二单端混频器。 放大器耦合到第一和第二混频器，用于在表示第一和第二中频信号的输出引线处形成放大的不平衡中频信号。

公开(公告)号：US20050191985A1

公开(公告)日：2005-09-01

申请号：US10789237

申请日：2004-02-27

Applicant: Thomas Bos ,  Edmar Camargo

Inventor： Thomas Bos ,  Edmar Camargo

IPC: H01Q11/12 ,  H03K9/00 ,  H04B1/04 ,  H04B1/28 ,  H04B1/30 ,  H04L27/06

CPC classification number: H04B1/30 ,  H04B1/0475 ,  H04B1/28

Abstract: A sub-harmonic mixer having at least one diode ring array used for up-conversion in a transmitter and for down-conversion in a receiver. Each diode ring array has a plurality of (e.g., four) diode rings arranged in parallel. The diode ring array may be connected in parallel or series with the signal flowing in the circuit. In a transmitter, a local oscillator (LO) generates an LO frequency signal. The sub-harmonic mixer generates a signal having twice the LO frequency using the LO frequency signal, and multiplies it to an intermediate frequency (IF) signal to generate a radio frequency (RF) signal for transmission. The sub-harmonic mixer may be a sub-harmonic image rejection mixer having two diode ring arrays (i.e., sub-harmonic mixers) that are coupled together through a 90° hybrid at an input and a 90° hybrid at an output. In a receiver, the sub-harmonic mixer receives an input RF signal and generates an output IF signal in a reverse process.

Abstract translation: 一种具有至少一个二极管环阵列的亚谐波混频器，用于在发射机中进行上转换，并在接收机中进行下变频。 每个二极管环阵列具有并联布置的多个（例如，四个）二极管环。 二极管环阵列可以与在电路中流动的信号并联或串联连接。 在发射机中，本地振荡器（LO）产生LO频率信号。 子谐波混频器使用LO频率信号产生具有两倍LO频率的信号，并将其乘以中频（IF）信号以产生用于传输的射频（RF）信号。 次谐波混频器可以是具有两个二极管环阵列（即，亚谐波混频器）的亚谐波抑制混频器，其通过输入端的90°混合器和输出端的90°混合器耦合在一起。 在接收机中，副谐波混频器接收输入RF信号并以相反的过程产生输出IF信号。