Sri International

Leolabs, Inc.

John J Buonocore

Michael Nicolls

Matthew A Stevenson

David Watters

Christopher Rosner

Bryan Klofas

Matthew Adelman

Steven Chen

Thomas Durak

Michael Greffen

Moyra Malone

Daniel P Ceperley

Ryan C Peterson

David A Watt

Mark F Schutzer

Gerald K Wong

Leon Tao

Daniel Ceperley

Edward Lu

Craig Trumbull

Inkwan Park

Nathan Griffith

Sanado Barolli

Roman Y Novoselov

Michael J Nicolls

Some of such technologies enable a technique for calibrating a radar based on using—A—an elemental antenna, which can be embedded on a housing hosting a set of antenna elements, or—B—an antenna mounted to a reflector (). Some of such technologies enable a radar site containing a first ID phased array () and a second ID phased array (), where the first ID phased array sends a set of signals and receives a set of reflections based on the set of signals, and the second ID phased array receives the set of reflections.

Calibrating radars and tracking space objects

Technologies for calibrating radars and tracking space objects. Some of such technologies enable a technique for calibrating a radar based on using -A- an elemental antenna (), which can be embedded on a housing hosting a set of antenna elements, or -B- an antenna () mounted to a reflector. Some of such technologies enable a radar site containing a first 1D phased array () and a second 1D phased array (), where the first 1D phased array sends a set of signals and receives a set of reflections based on the set of signals, and the second 1D phased array receives the set of reflections.

A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

1D phased array antenna for radar and communications

Implementation of radio frequency applications in satellite environments can be constrained by size, mass, cost, and power limitations. These applications can include radar, communications, radio astronomy, or other scientific or industrial applications. A variety of systems are provided to facilitate recording of baseband radio frequency signals at high bandwidth and low power using low-cost components. These systems include field-programmable gate arrays or other programmable logic devices integrating between high-frequency ADCs and two or more multiplexed non-volatile storage mediums. Also provided are systems for providing calibration and self-test functionality in a low-cost, flexible, low-power radio frequency frontend. These systems include high-frequency switches configured to allow a calibration and/or self-test pulse to be acquired for each radar pulse generated by the system.

CubeSat radar systems

A method of calibrating a phased-array radar includes receiving a signal at one of either a mobile platform or an antenna element of the phased-array radar, the transmission being sent as a transmitted signal from either the mobile platform or the antenna element, correlating the received signal to the transmitted signal to produce an initial phase delay for that antenna element, determining a difference between the initial phase delay and an expected phase delay, wherein the expected phase delay is based upon a relative position between the antenna element and the mobile platform, and saving the difference as a final phase delay for the antenna element. A system for calibrating a phased-array radar includes a phased-array radar having an array of antenna elements, and a mobile platform capable of flying over the phased-array. The mobile platform has an antenna, a transmitter to transmit signals through the antenna, a software defined receiver tuned to operations of the phased-array radar, and a global positioning satellite receiver.

Drone-based calibration of a phased array radar

Growing community of inventors

Redwood City, CA, United States of America

John J Buonocore