公开(公告)号：US4401952A

公开(公告)日：1983-08-30

申请号：US285211

申请日：1981-07-20

Applicant: Ganesh R. Basawapatna

Inventor： Ganesh R. Basawapatna

IPC: H03F1/48 ,  H03F3/193 ,  H03F3/60 ,  H03F3/72 ,  H03F3/16

CPC classification number: H03F3/604 ,  H03B19/14 ,  H03F1/48 ,  H03F3/1935 ,  H03F3/72 ,  H03F2203/7221 ,  H03F2203/7233

Abstract: A solid-state microwave signal amplifying and multiplying apparatus capable of substantially continuous tuning over an extended frequency range in the microwave region. A single gallium arsenide metal semiconductor field-effect transistor (MESFET) is switchably coupled by means of PIN diodes through selected output matching networks consisting of relatively narrowband frequency sections. Bias to the MESFET is provided through PIN diodes in a manner to select a linear (fundamental frequency) or nonlinear (multiplied frequency) operating region. In this manner a single microwave active device may be utilized with a plurality of passive networks to achieve extremely wideband amplification meeting good amplification and impedance matching criteria.

Abstract translation: 一种固体微波信号放大和乘法装置，其能够在微波区域中的扩展频率范围内基本上连续调谐。 单个砷化镓金属半导体场效应晶体管（MESFET）通过PIN二极管通过由相对窄带频率部分组成的选定输出匹配网络可切换地耦合。 通过PIN二极管以选择线性（基频）或非线性（倍频）操作区域的方式提供对MESFET的偏置。 以这种方式，单个微波有源器件可以与多个无源网络一起使用，以实现满足良好放大和阻抗匹配标准的极宽放大。

公开(公告)号：US5534941A

公开(公告)日：1996-07-09

申请号：US245596

申请日：1994-05-20

Applicant: John J. Sie ,  Ganesh R. Basawapatna

Inventor： John J. Sie ,  Ganesh R. Basawapatna

IPC: H04N5/44 ,  H04N5/45 ,  H04N7/08 ,  H04N7/16

CPC classification number: H04N7/0806 ,  H04N5/44 ,  H04N7/16 ,  H04N5/4401 ,  H04N5/45

Abstract: A system is provided by which a single active video signal, along with a plurality of audio and data streams can be made to represent a number of different screens of information at a cable TV set. The system uses essentially only the bandwidth of a single video channel to provide a viewer with a plurality of screens, one or more of which include the same active video picture, simultaneously with other screens which display only audio and text/graphics. This multiple-screen capability is provided by a mapping function which creates an effective plurality of channels that are dynamically and seamlessly switched.

Abstract translation: 提供了一种系统，通过该系统可以使单个活动视频信号连同多个音频和数据流一起在有线电视机上表示许多不同的信息屏幕。 该系统基本上仅使用单个视频通道的带宽来向观众提供多个屏幕，其中一个或多个屏幕包括相同的活动视频图像，同时显示仅显示音频和文本/图形的其他屏幕。 该多屏幕功能由映射功能提供，其创建动态和无缝切换的有效多个信道。

公开(公告)号：US4554516A

公开(公告)日：1985-11-19

申请号：US676043

申请日：1984-11-29

Applicant: Ganesh R. Basawapatna

Inventor： Ganesh R. Basawapatna

IPC: H03B1/00 ,  H03B1/04 ,  H03B5/18 ,  H03B19/14 ,  H03B23/00

CPC classification number: H03B5/1882 ,  H03B19/14 ,  H03B2201/0241 ,  H03B2201/0258 ,  H03B2202/05 ,  H03B5/1888

Abstract: An electronically tunable solid-state microwave frequency source comprises a transmission-absorption filter incorporated within a magnetic structure. The transmission-absorption filter is employed with a tunable solid-state oscillator and tunable solid-state multiplier to provide a continuously tunable microwave signal source with enhanced spurious signal attenuation over a multiple-octave tuning range. The filter structure comprises a sphere of monocrystalline garnet such as yttrium iron garnet (YIG) and two coupling loops disposed in the field region of an adjustable field DC magnet. The coupling loops are disposed orthogonal to the magnetic field and to each other. In a specific embodiment the first coupling loop is operative to receive at its input the fundamental frequency signal and at its output is grounded, and the second coupling loop is operative to receive a harmonic input signal at its input and to convey a desired output signal at its output. The magnetic sphere of the transmission-absorption filter typically shares the magnetic field of the YIG sphere used to produce the output of the tuned oscillator. The transmission-absorption filter is incorporated into a source including a switch, a fundamental frequency amplifier and a harmonic frequency amplifier.

Abstract translation: 电子可调谐固体微波频率源包括结合在磁性结构内的透射吸收滤光片。 传输吸收滤波器与可调谐固态振荡器和可调谐固态倍增器一起使用，以在多倍频程调谐范围内提供具有增强的寄生信号衰减的连续可调微波信号源。 过滤器结构包括单晶石榴石球，例如钇铁石榴石（YIG）和设置在可调直径磁体的场区域中的两个耦合回路。 耦合回路与磁场和彼此正交设置。 在具体实施例中，第一耦合回路可操作以在其输入处接收基频信号，并且在其输出端接地，并且第二耦合回路可操作以在其输入处接收谐波输入信号，并在 其输出。 透射吸收滤光器的磁球通常共享用于产生调谐振荡器的输出的YIG球的磁场。 传输吸收滤波器被并入包括开关，基频放大器和谐波放大器的源。