摘要:
A radiometer for sensing energy includes a first amplifier for amplifying the energy, the first amplifier having a first output, a reference amplifier having a reference input and having a second output, a second amplifier having an input coupled to the first output and the second output, and a controller for switching on and off the first amplifier and the reference amplifier, so that the when the first amplifier is on, the reference amplifier is off, and so that the when the reference amplifier is on, the first amplifier is off.
摘要:
A multi-layered semiconductor apparatus capable of producing at least 500 W of continuous power includes at least two device substrates arranged in a stack. Each of the at least two device substrates has a first side and a second side opposite to the first side, and each of the at least two device substrates is configured to produce an average power density higher than 100 W/cm2. A plurality of active devices are provided on the first side of each of the at least two device substrates. The plurality of active devices are radiatively coupled among the at least two device substrates. At least one of the at least two device substrates is structured to provide a plurality of cavities on its second side to receive corresponding ones of the plurality of active devices on the first side of an adjacent one of the at least two device substrates.
摘要翻译:能够产生至少500W的连续功率的多层半导体装置包括布置在堆叠中的至少两个器件衬底。 所述至少两个器件衬底中的每一个具有与第一侧相对的第一侧和第二侧,并且所述至少两个器件衬底中的每一个被配置为产生高于100W / cm 2的平均功率密度。 多个有源器件设置在至少两个器件衬底中的每一个的第一侧上。 多个有源器件辐射耦合在至少两个器件衬底之间。 所述至少两个器件衬底中的至少一个被构造成在其第二侧上提供多个空腔,以在所述至少两个器件衬底中相邻的器件衬底的第一侧上接收所述多个有源器件中的相应的空穴。
摘要:
An artificial impedance structure and a method for manufacturing same. The structure contains a dielectric layer having generally opposed first and second surfaces, a conductive layer disposed on the first surface, and a plurality of conductive structures disposed on the second surface to provide a preselected impedance profile along the second surface.
摘要:
When illuminated with a plane wave a variable cross-coupling partial reflector reflects a specific amount of a cross-polarized field and a specific amount of a co-polarized field and transmits the remaining power with low attenuation. This is achieved with a pair of frequency selective surfaces (FSS) that are rotated with respect to the incident plane wave. The FSSs can be fixed with a given alignment for a particular application or a tuning mechanism can be provided to independently rotate the surfaces and adapt the reflected co- and cross-polarized fields to changing requirements. Of particular interest is the ability to provide a specific amount of cross-polarized reflected power while reflecting no co-polarized field over a certain range of wavelengths. This will be useful to increase power efficiency in, for example, wave power sources that utilize quasi-optical power by causing oscillations in reflection amplifier arrays.
摘要:
An apparatus and method for building three-dimensional spatial power combiners for efficiently combining power from a large number of active devices are being disclosed. The apparatus discloses a plurality of grid amplifiers, each having a major surface, the plurality of grid amplifiers are arranged along an axis that is perpendicular to the major surface of each grid amplifier and spatially separated from each other by a selected resonant distance to generate a standing wave between adjacent grid amplifiers. The method discloses selecting a plurality of grid amplifiers each having a major surface, arranging the plurality of grid amplifiers along an axis that is perpendicular to the major surface of each grid amplifier, selecting a resonance distance, and spatially separating said plurality of grid amplifiers by the resonant distance to generate a standing wave between adjacent grid amplifiers.
摘要:
A method for guiding waves over objects, a method for improving a performance of an antenna, and a method for improving a performance of a radar are disclosed. The methods disclosed teach how an impedance structure can be used to guide waves over objects.
摘要:
An antenna array comprises a substrate; a plurality of projecting, tapering structures disposed in an array and attached to a first major surface of said substrate, the plurality of projecting, tapering structures defining a plurality of waveguides therebetween; and a plurality of box-shaped structures disposed in an array and attached to a second major surface of the substrate, the plurality of box-shaped structures defining a plurality of waveguides therebetween, the plurality of waveguides defined by the plurality of projecting, tapering structures aligning with the plurality of waveguides defined by the plurality of box-shaped structures. The substrate includes a plurality of probes for feeding the plurality waveguides.
摘要:
A travelling waveguide antenna has top and bottom spaced plates, the top plate having radiating apertures extending therethrough. The apertures have inclined surfaces facing one another to provide an outward flare of the apertures.
摘要:
Steering of an electromagnetic beam of energy in the upper plate of a plate waveguide of a traveling wave antenna concurrently with the formation of a flat phase front and collimation of the electromagnetic beam is achieved by providing a second waveguide beneath the lower plate of the first waveguide and providing a 180% bend parabolic main reflector to reflect the energy beam to the upper plate of the upper waveguide. A feed horn is located in the lower waveguide and illuminates a pivotal subreflector which reflects the energy to the parabolic main reflector. By rotating the subreflector about its pivot point, the beam which is radiated to the upper waveguide is angularly shifted or steered.
摘要:
A microstrip transmission line to waveguide transmission line transition. A microstrip transmission line is separated from a ground plane by a dielectric therebetween. The microstrip transmission line terminates at a microstrip transmission line open circuit end. A waveguide channel having narrow dimension waveguide walls and a broad dimension base waveguide wall connected therebetween is provided. The waveguide channel has a waveguide short circuit wall located along the channel. The narrow dimension waveguide walls are coupled with the ground plane to provide a broad dimension top waveguide wall for the waveguide transmission line. An aperture is located transverse to the microstrip transmission line and passes through an aperture ground plane opening in the ground plane. The aperture is located proximate to the microstrip transmission line open circuit end to provide a microstrip transmission line open circuit stub and proximate to the waveguide short circuit wall to provide a waveguide transmission line short circuit stub.