公开(公告)号：WO1988010523A2

公开(公告)日：1988-12-29

申请号：PCT/US1988001466

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KLIMCZAK, William, N.

IPC: H01Q21/22

CPC classification number: H01Q21/22

Abstract: A phased array antenna (10) includes a plurality of radiating elements (14) arranged in concentric rings (11, 12) to form a deterministically thinned antenna aperture which facilitates heat removal from the array, while minimizing side lobe signals and thereby increasing directively of the antenna for a preselected antenna gain. The radiating elements (14) in any one of the rings (11, 12) are the same radiating size, and the spacing (L, L') between elements in the same ring and between elements in adjacent rings (S, S') is determined by the number of elements in each ring. The rings may be any of several shapes, including circular or polygonal.

公开(公告)号：WO1988010497A2

公开(公告)日：1988-12-29

申请号：PCT/US1988001473

申请日：1988-05-09

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  OWECHKO, Yuri

IPC: G11C15/00

CPC classification number: G11C15/00

Abstract: An associative memory system is provided which is a hybrid of optical and electronic components. In the preferred embodiment, a Fourier transform hologram is used to convolve a reference beam with correlated input images and stored object images. An electronic iteration loop is provided which is used to derive an enhanced reference beam for use in matching and enhancing the associative memory of the hologram with the object input plane image. The iteration loop of electronic components comprises a vidicon which receives the correlation plane image and provides that image in the form of an electronic signal to an electronic thresholding device or image processor. The image processor is capable of viewing the data at the rate of 30 frames per second and is used in the preferred embodiment to threshold the data with reference to the greatest amplitude portion of the correlation spot provided to the vidicon. After the electronic threshold has processed the signal, an improved signal is provided to the cathode ray tube screen. This processed signal is used to phase-modulate a projection light readout beam through use of a liquid crystal light valve. A polarizing beam splitter converts the phase modulation of the readout beam to an amplitude modulation wherein an enhanced reference beam is derived which is processed back to the hologram for readout at the output plane of the system. In this manner a variable-gain fast response electronic and optical component hybrid is provided for use as an associative memory.

公开(公告)号：WO1988010151A1

公开(公告)日：1988-12-29

申请号：PCT/US1988001453

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  PASTOR, Ricardo, C. ,  GORRE, Luisa, E. ,  CHRISTENSEN, Lorna, D.

IPC: B01J23/40

CPC classification number: H01S3/036 ,  B01J23/622

Abstract: A catalyst material having a catalyst metal selected from the group consisting of platinum, iridium, rhodium and palladium, supported on a substrate, selected from the group consisting of aluminum oxide and tin oxide, wherein the substrate has at least two types of surface atomic sites at which the catalyst metal can reside, and the catalyst metal resides primarily in one of those types of sites. In one catalyst material having platinum supported on an aluminum oxide substrate, the platinum atoms are located predominantly in the substrate sites having the lowest activation energy for catalysis of a chemical reaction. Population of only the low energy type of site is achieved by limiting the platinum content to from about 0.25 to about 1.0 atomic percent.

公开(公告)号：WO1988009527A1

公开(公告)日：1988-12-01

申请号：PCT/US1988001162

申请日：1988-04-13

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  GRANGER, Diana, D. ,  MILLER, Leroy, J.

IPC: G03C0

公开(公告)号：WO1988009059A1

公开(公告)日：1988-11-17

申请号：PCT/US1988000938

申请日：1988-03-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CLARK, William, M., Jr. ,  WALDEN, Robert, H. ,  UTLAUT, Mark, W.

IPC: H01L29/78

CPC classification number: H01L29/1062

Abstract: A charge-coupled device (CCD) is provided with a dopant implant gradient, lateral channel stops (12, 14) and blocking implants (16) by means of a focused ion beam (FIB). The FIB is repeatedly scanned across each cell of the CCD as a succession of overlapping but discrete implant scans. The doping levels of the FIB implants accumulate to a stepwise approximation of a desired dopant density profile, the widths of the steps being no greater than about half the widths of the discrete FIB implants. With a FIB pixel of about 750-1500 Angstroms, the widths of the steps are preferably about 250-500 Angstroms; the dimension of the cells in the dopant gradient direction can be made less than about 5 microns. The lateral channel stops and back blocking implants can be as narrow as single FIB pixel widths, thus freeing up more of the cell for charge carrying capacity.

Abstract translation: 电荷耦合器件（CCD）具有掺杂剂注入梯度，通过聚焦离子束（FIB）的横向通道停止（12,14）和阻塞植入物（16）。 FIB被重复地扫描在CCD的每个单元上，作为一系列重叠但离散的植入物扫描。 FIB植入物的掺杂水平累积到期望掺杂剂密度分布的逐步近似，步长的宽度不大于离散FIB植入物的宽度的大约一半。 具有约750-1500埃的FIB像素，步长的宽度优选为约250-500埃; 可以使掺杂剂梯度方向上的单元的尺寸小于约5微米。 横向通道停止，背部阻挡植入物可以与单个FIB像素宽度一样窄，从而释放出更多的电池用于充电容量。

公开(公告)号：WO1988009057A1

公开(公告)日：1988-11-17

申请号：PCT/US1988000664

申请日：1988-03-07

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  CHEN, James, C. ,  WONG, Wah, S. ,  PAO, Cheng, K.

IPC: H01L23/48

CPC classification number: H01L21/743 ,  H01L23/36 ,  H01L23/4825 ,  H01L29/417 ,  H01L29/8613 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A two-terminal semiconductor diode (18) device and method for manufacturing the same is disclosed. The semiconductor diode geometry is defined by mesa etching. An ohmic contact (20) is disposed on the flat topped summit (27) of the mesa and another ohmic contact (25) in the shape of a ring is disposed on the bottom layer (29) of the diode. A dielectric layer (30) disposed over the diode has a via hole (50) therethrough to make external contacts to a metallic heat sink and ground. A substrate layer (11) supports the semiconductor diode and has a second offset via hole (40) therethrough to the ring contact for external circuit contact and biasing of the diode. The offset via hole simplifies the manufacturing process. Additionally, the active area of the diode makes direct contact to the heat sink improving heat transfer from the device.

公开(公告)号：WO1988008623A1

公开(公告)日：1988-11-03

申请号：PCT/US1988001319

申请日：1988-04-21

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  MIGLIA, EGIDIO

IPC: H01Q25/00

CPC classification number: H01Q3/24 ,  H01Q3/26 ,  H01Q25/00

Abstract: A multifunction active array system is disclosed, wherein the array aperture may be partitioned into a plurality of arbitrary subapertures. The array system includes N radiative elements, each coupled to a corresponding active module. Each module is in turn connected to an aperture partition selector (40), which includes an M-way power divider/combiner device (42), having a module port (34) and M device ports. Each device port is coupled through an RF switch (46) to a partition port of the device. M N-way manifolds (52, 62, ....) are provided, having N manifold ports coupled to a respective one of said partition ports of each selector. The manifolds are coupled to a receiver (92) and an excitation source (90). Each partition may be formed by the desired connection of a particular module to a manifold by the respective positions of the RF switches. The array system provides the capabilities of partitioning the array into M or less subapertures to simultaneously generate sum patterns, difference patterns, guard patterns, and adaptive nullings. The partitions on receive and transmit are independent, and they may differ in an arbitrary manner. The subapertures may overlap.

公开(公告)号：WO1988007289A1

公开(公告)日：1988-09-22

申请号：PCT/US1988000253

申请日：1988-01-28

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  UNDERWOOD, George, D.

IPC: H03K05/05

CPC classification number: H03K3/017 ,  H03K5/05 ,  H03K5/131 ,  H03K2005/00234 ,  H03K2005/00254

Abstract: A method and apparatus for obtaining high frequency resolution of a low frequency data signal are provided. The invention comprises a low frequency select logic (27) for generating the data signal having low frequency resolution, low frequency state machine logic (29) for determining whether the data signal is resolved to predetermined high frequency resolution characteristics and circuitry for generating a correction signal to modify the data signal to high frequency resolution, and high frequency logic (17) for modifying the data signal in response to the low frequency correction signal. The high frequency logic (17) operates to selectively modify the path of low frequency data in response to the correction signal to modify the low frequency data signal to obtain high frequency resolution .

公开(公告)号：WO1988006808A2

公开(公告)日：1988-09-07

申请号：PCT/US1988000362

申请日：1988-02-08

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  TANG, Raymond

IPC: H01Q03/24

CPC classification number: H01Q3/24 ,  H01Q3/46 ,  H01Q25/00

Abstract: A lens antenna (10) having four phased array apertures (12, 14, 16, and 18) positioned for hemispherical coverage is disclosed. An array of phase shifters (52) is disclosed, each of which is interconnected with four radiating elements (54, 56, 58, and 60), one on each of the four apertures. A feed horn (30) is used to feed the lens and switches (48, 50) in the lens are used to switch the energy received from the feed horn to the phase shifter, and after phase shifting, to a selected aperture for radiation. The switches also perform a reciprocal function by switching energy received at an aperture to the phase shifter and then to an aperture for radiation to the feed horn. In a further embodiment, the mounting of transmitting and receiving components, such as a high power amplifier (70) and a low noise amplifier (72), with a combination of DPDT switches in the lens is disclosed and results in a solid state T/R type antenna array. In one embodiment, the switches enable the lens to radiate from three of the apertures for a scan angle of 270 degrees from a single feed horn. The addition of mor efeed horns per face results in multiple radiated beams from a single face.

公开(公告)号：WO1988005984A2

公开(公告)日：1988-08-11

申请号：PCT/US1987003504

申请日：1987-12-09

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  KLATT, Robert, W.

IPC: H04N03/15

CPC classification number: H04N5/335 ,  G08C15/04 ,  H04N5/33

Abstract: The apparatus (10) includes a plurality of elemental detectors (16-32) each of which is being operable to generate an output in response to receipt of electromagnetic radiation. Also provided is a circuit for frequency division multiplexing the output of said elemental detectors.

Abstract translation: 装置（10）包括多个元素检测器（16-32），每个元件检测器可操作以响应于电磁辐射的接收而产生输出。 还提供了用于对所述元素检测器的输出进行频分复用的电路。