Multi-polarization HF NVIS for vertical lift aircraft

    公开(公告)号:US11539118B2

    公开(公告)日:2022-12-27

    申请号:US17159683

    申请日:2021-01-27

    IPC分类号: H01Q1/28 H04B17/336 H01Q1/50

    摘要: A system of high-frequency (HF) antennas is disposed on various aircraft body panels. The antennas are configured for orthogonal polarization such that NVIS may be operable no matter the state of the ionosphere. The antennas are disposed on substantially perpendicular body panels so that, when operated in concert, the resulting signals have opposite polarization and at least one signal will bounce off the ionosphere.

    Non-uniform sampling photonic analog-to-digital converter

    公开(公告)号:US11533062B1

    公开(公告)日:2022-12-20

    申请号:US17361677

    申请日:2021-06-29

    摘要: A non-uniform sampling pADC is disclosed. The pADC may include an optical pulse source configured to generate uniform optic pulses. The pADC may include a non-uniform sampling system. The non-uniform sampling system may include an inter-pulse timing modulation sub-system configured to convert the uniform optic pulses into non-uniform optic pulses. The non-uniform sampling system may include a timing control sub-system configured to control the timing of the optical pulse source. The pADC may include an optical modulator configured to modulate the non-uniform optical pulses. The pADC may include a photodetector configured to convert the modulated non-uniform optic pulses into electronic pulses. The pADC may include a pulse capture assembly configured to capture a pulse amplitude of the electronic pulses and generate sampled radio frequency output pulses. The pADC may include a quantizer configured to quantize the sampled radio frequency output pulses and generate digital radio frequency output signals.

    Parallel scatterometry overlay metrology

    公开(公告)号:US11531275B1

    公开(公告)日:2022-12-20

    申请号:US17411539

    申请日:2021-08-25

    申请人: KLA Corporation

    IPC分类号: G03F7/20 G01B11/27

    摘要: An overlay metrology tool may include an illumination source to generate a first illumination beam distribution with a first linear polarization and a second illumination beam distribution with a second linear polarization orthogonal to the first linear polarization, an illumination sub-system to sequentially illuminate two or more cell pairs of an overlay target on a sample having orthogonally oriented grating-over-grating structures, a collection sub-system with two collection channels to capture collected light from an illuminated cell pair and filtering optics to direct light from different cells in an illuminated cell pair to different collection channels for detection. The tool may further include a controller to generate separate overlay measurements for orthogonally-oriented grating-over-grating structures in the two or more cell pairs.

    Beverage maker platen overflow sensing system

    公开(公告)号:US11529015B2

    公开(公告)日:2022-12-20

    申请号:US16433207

    申请日:2019-06-06

    IPC分类号: A47J31/52 A47J31/46

    摘要: A beverage maker platen overflow sensing system is disclosed. The sensing system includes a process control board (PCB) in communication with solenoid valves of a manifold, the solenoid valves controlling the flow of hot water (e.g., for brewing coffee or tea) into a server positioned in a platen of the beverage maker. The PCB further includes an overflow detection circuit connected to the solenoid valves. Two signal probes are positioned near the forward edge of the platen. Similarly, ground probes are positioned in the platen below the signal probes and providing a ground path to the PCB. The overflow detection circuit generates an electrical signal between the signal probes and detects an overflow state when fluid in the platen grounds the signal between the signal probes and the ground probes. While the overflow persists, the overflow detection circuit ceases the water flow by electrically signaling the solenoid valves to close.

    Multi-field scanning overlay metrology

    公开(公告)号:US11526086B2

    公开(公告)日:2022-12-13

    申请号:US17195507

    申请日:2021-03-08

    申请人: KLA Corporation

    IPC分类号: G03F7/20 G01N21/95 G01N21/956

    摘要: A metrology tool may include an illumination sub-system to illuminate sample within two or more acquisition fields with two or more illumination beams, where the two or more acquisition fields are distributed along a scan direction in a non-overlapping configuration, and where a translation stage translates a metrology target on the sample along the scan direction sequentially through the two or more acquisition fields. The metrology tool may further include an imaging sub-system to image the two or more acquisition fields while the sample is scanned along the scan direction. The imaging sub-system may include a field-repositioning optical relay to relay images of the two or more acquisition fields to a scanning detector including one or more pixel columns distributed along a column direction, where the field-repositioning optical relay positions the images of the two or more acquisition fields on the scanning detector along the column direction.

    System and method for analog estimation and streaming of a spectral correlation function (SCF)

    公开(公告)号:US11515946B1

    公开(公告)日:2022-11-29

    申请号:US17535064

    申请日:2021-11-24

    发明人: Daniel J. Esman

    IPC分类号: H04B10/2575 H04B10/54

    摘要: A system and method for analog estimation of a spectral correlation function (SCF) provides a photonic carrier to generate a signal comb and offset comb, each comprising N comb tones separated by respective repetition rates ΔF and ΔF+δF. The signal and offset combs are amplitude-modulated according to an inbound RF signal of interest and filtered via periodic optical filters to produce a sequence of N Fourier components of the signal comb and N Fourier components of the offset comb, each filtered signal comb component overlapping with a filtered offset comb component. In-phase/quadrature (I/Q) components of the products of each component of the complex conjugate of the filtered offset comb and the overlapping counterpart of the filtered signal comb are generated in an optical receiver and digitized into slices of the SCF at a fixed time instance and center frequency, correlated at various cyclic separations α.

    Combining taxi signage generated from airport surface routing network data

    公开(公告)号:US11514804B2

    公开(公告)日:2022-11-29

    申请号:US16674959

    申请日:2019-11-05

    IPC分类号: G08G5/06 G08G5/00 H04W4/02

    摘要: Combined taxi signage may be generated from taxi signage for a first origination node and taxi signage for a second origination node, the first origination node and the second origination node being of a select proximity and orientation relative to an aircraft. The taxi signage for the first origination node may be generated from the first origination node and at least a first termination node stored within an airport surface routing network data, and a first turning angle determined based on a comparison between the first origination node and the at least the first termination node. The taxi signage for the second origination node may be generated from the second origination node and at least a second termination node stored within the airport surface routing network data, and a second turning angle determined based on a comparison between the second origination node and the at least the second termination node. The combined taxi signage may be included in a combined billboard displayed on the display device of the aircraft.