Abstract: A method for facilitating physiological data acquisition includes scheduling a medical appointment between a patient and a medical provider. The medical appointment is to be conducted at a medical provider location on an appointment date. The method also includes selecting a medical device configured to acquire physiological data regarding the patient. The method further includes sending, to a fulfillment system, a request to provide the medical device to a patient location prior to the appointment date. The patient location is remote from the medical provider location.

Abstract: An embodiment of an antenna comprises an array of antenna elements arranged in groups of antenna elements adjustably coupled to respective reference waves. A multiplicity of patterns of antenna coupling settings are defined, each of which gives rise to a main lobe which points the antenna in a particular direction, each pattern also giving rise to respective side lobes. First and second such patterns may point the antenna in the same direction but with non-identical side lobes. In this way the clutter level from the side lobes relative to the main lobe is much smaller than would be the case if one of the patterns were employed both for transmitting and receiving. Alternatively, the first and second patterns may be used in quick succession both for transmitting, or used in quick succession both for receiving. The antenna may also switch rapidly between patterns where the main lobe points in a different direction in each pattern, allowing dithering of the beam or rapid switching between scanning and tracking.

Abstract: A holographic radar reflector includes a surface with a plurality of substantially microwave wavelength scale patterns along one or more portions of the surface. The holographic radar reflector can be a non-specular reflector, where the plurality of substantially microwave wavelength scale patterns have varying reflectivity. The holographic radar reflector can reflect electromagnetic radiation emitted from a fixed feed point in varying directions depending on the portion of the surface reflecting the electromagnetic radiation.

Abstract: An embodiment of an antenna includes first and second transmission lines, first antenna elements, and second antenna elements. The first transmission line is configured to guide a first signal such that the first signal has a characteristic of a first value, and the second transmission line is configured to guide a second signal such that the second signal has the same characteristic but of a second value that is different than the first value. The first antenna elements are each disposed adjacent to the first transmission line and are each configured to radiate the first signal in response to a respective first control signal, and the second antenna elements are each disposed adjacent to the second transmission line and are each configured to radiate the second signal in response to a respective second control signal. Such an antenna can have better main-beam and side-lobe characteristics, and a better SIR, than prior antennas.

Abstract: Surface scattering antennas on curved manifolds provide adjustable radiation fields by adjustably coupling scattering elements along a wave-propagating structure.

Abstract: Compressive imaging captures images in compressed form, where each sensor does not directly correspond with a pixel, as opposed to standard image capture techniques. This can lead to faster image capture rates due to lower I/O bandwidth requirements, and avoids the need for image compression hardware, as the image is captured in compressed form. Measuring the transformation of an emitted multimodal signal is one method of compressive imaging. Metamaterial antennas and transceivers are well suited for both emitting and receiving multimodal signals, and are thus prime candidates for compressive imaging.

Abstract: Described embodiments include an electromagnetic beam steering apparatus. The apparatus includes a first planar component including a first artificially structured effective media having a first tangential refractive index gradient configured to deflect incident electromagnetic beams at a first deflection angle. The apparatus includes a second planar component includes a second artificially structured effective media having a second tangential refractive index gradient configured to deflect incident electromagnetic beams at a second deflection angle. The apparatus includes an electromagnetic beam steering structure configured to independently rotate the first planar component and the second planar component about a coaxial axis such that an electromagnetic beam incident on the first planar component exits the second planar component as a steered electromagnetic beam.

Abstract: The present disclosure provides systems and methods associated with mode conversion for electromagnetic field modification. A mode converting structure (holographic metamaterial) is formed with a distribution of dielectric constants chosen to convert an electromagnetic radiation pattern from a first mode to a second mode to attain a target electromagnetic radiation pattern that is different from the input electromagnetic radiation pattern. A solution to a holographic equation provides a sufficiently accurate approximation of a distribution of dielectric constants that can be used to form a mode converting device for use with one or more transmission lines, such as waveguides. One or more optimization algorithms can be used to improve the efficiency of the mode conversion.

Abstract: An embodiment of an antenna includes first and second transmission lines, first antenna elements, and second antenna elements. The first transmission line is configured to guide a first signal such that the first signal has a characteristic of a first value, and the second transmission line is configured to guide a second signal such that the second signal has the same characteristic but of a second value that is different than the first value. The first antenna elements are each disposed adjacent to the first transmission line and are each configured to radiate the first signal in response to a respective first control signal, and the second antenna elements are each disposed adjacent to the second transmission line and are each configured to radiate the second signal in response to a respective second control signal. Such an antenna can have better main-beam and side-lobe characteristics, and a better SIR, than prior antennas.

Abstract: Compressive imaging captures images in compressed form, where each sensor does not directly correspond with a pixel, as opposed to standard image capture techniques. This can lead to faster image capture rates due to lower I/O bandwidth requirements, and avoids the need for image compression hardware, as the image is captured in compressed form. Measuring the transformation of an emitted multimodal signal is one method of compressive imaging. Metamaterial antennas and transceivers are well suited for both emitting and receiving multimodal signals, and are thus prime candidates for compressive imaging.

Abstract: Methods and system for performing magnetic induction tomography imaging of an object are provided. An apparatus includes an array of unit cells and a control circuit coupled to the array of unit cells. The array of unit cells can generate a first magnetic field using an excitation pattern in the direction of a target object and sense a second magnetic field induced in the target object by the first magnetic field. The control circuit can determine a minimum of the first magnetic field. The minimum may correspond to a higher conductivity region of the target object. The control circuit can adjust the excitation pattern based on the higher conductivity region of the target object.

Abstract: Discrete-dipole methods and systems for applications to complementary metamaterials are disclosed. According to an aspect, a method includes identifying a discrete dipole interaction matrix for a plurality of discrete dipoles corresponding to a plurality of scattering elements of a surface scattering antenna.

Abstract: An embodiment of a radar subsystem includes at least one antenna and a control circuit. The at least one antenna is configured to radiate at least one first transmit beam and to form at least one first receive beam. And the control circuit is configured to steer the at least one first transmit beam and the at least one first receive beam over a first field of regard during a first time period, and to steer the at least one first transmit beam and the at least one first receive beam over a second field of regard during a second time period.

Abstract: A vehicle includes an occupant monitoring system configured to acquire occupant data regarding an occupant of the vehicle; a robotic driving system configured to provide robotic control of the vehicle during a robotic driving mode; and a processing circuit coupled to the occupant monitoring system and the robotic driving system. The processing circuit is configured to: receive the occupant data; determine a vehicle operation command based on the occupant data, the vehicle operation command configured to affect operation of the vehicle while the vehicle is in the robotic driving mode; and provide the vehicle operation command to a vehicle system.

Abstract: According to an embodiment, an antenna includes a conductive antenna element, a voltage-bias conductor, and a polarization-compensation conductor. The conductive antenna element is configured to radiate a first signal having a first polarization, and the voltage-bias conductor is coupled to a side of the antenna element and is configured to radiate a second signal having a second polarization that is different from the first polarization. And the polarization-compensating conductor is coupled to an opposite side of the antenna element and is configured to radiate third a signal having a third polarization that is approximately the same as the second polarization and that destructively interferes with the second signal. Such an antenna can be configured to reduce cross-polarization of the signals that its antenna elements radiate.

Abstract: Embodiments disclosed herein relate to an interactive surgical drape and system including at least one sensor and at least one controller that operates indicating sensing feedback from the at least one sensor to cause display of information on a dynamic display integrated with the interactive surgical drape. The dynamic display assists the surgical team while performing surgery and can operate to improve the efficiency and/or effectiveness of the surgical team.

Abstract: Described embodiments include an antenna and a method. In an embodiment, the antenna includes a holographic aperture having a surface including a plurality of individual electromagnetic wave scattering elements distributed thereon with a periodic inter-element spacing equal to or less than one-half of a free space wavelength of an operating frequency of the antenna. The aperture is configured to define at least two selectable complex radiofrequency electromagnetic fields on the surface with tangential wavenumbers up to 2? over the aperture element spacing (k_apt=2?/a). In an embodiment, the holographic aperture includes an amplitude and phase modulation holographic aperture.

Abstract: Embodiments disclosed herein relate to an interactive surgical drape and system including at least one sensor and at least one controller that operates indicating sensing feedback from the at least one sensor to cause display of information on a dynamic display integrated with the interactive surgical drape. The dynamic display assists the surgical team while performing surgery and can operate to improve the efficiency and/or effectiveness of the surgical team.

Abstract: In an embodiment, an antenna includes a one-dimensional array of antenna cells, a signal feed, and signal couplers. The antenna cells are each spaced from an adjacent antenna cell by less than one half a wavelength at which the antenna cells are configured to transmit and to receive, are configured to generate an array beam that is narrower in a dimension than in an orthogonal dimension, and are configured to steer the array beam in the dimension. And the signal couplers are each configured to couple a respective one of the antenna cells to the signal feed in response a respective control signal having an active level. For example, the antenna cells can be arranged such that a straight line intersects their geometric centers.

Abstract: The present disclosure provides systems and methods associated with mode conversion for electromagnetic field modification. A mode converting structure (holographic metamaterial) is formed with a distribution of dielectric constants chosen to convert an electromagnetic radiation pattern from a first mode to a second mode to attain a target electromagnetic radiation pattern that is different from the input electromagnetic radiation pattern. A solution to a holographic equation provides a sufficiently accurate approximation of a distribution of dielectric constants that can be used to form a mode converting device for use with one or more transmission lines, such as waveguides. One or more optimization algorithms can be used to improve the efficiency of the mode conversion.