A compact, hand-held device for wireless powering, interrogation and data retrieval from at least one implanted sensor. The hand-held device includes an antenna for powering an implanted sensor and for receiving data from the implanted sensor to the hand-held device for at least one of storage, display or analysis. The hand-held device establishes electromagnetic coupling with a low radiating radio frequency power inductor in the implanted sensor at a predefined separation and the antenna geometry allows for the antenna to power, interrogate and retrieve data from the implanted sensor without strapping the hand-held device to a human body housing the implanted sensor The hand-held device optionally allows for activation of the implanted sensor only during interrogation and data retrieval.

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Hand held device for wireless powering and interrogation of biomems sensors and actuators

Systems and methods for wireless power transmission are described herein In one aspect, an apparatus for wireless power transmission comprises a first antenna array of antenna coils configured to generate a first wireless field A second antenna array of antenna coils generates a second wireless field The first antenna array at least partially overlaps the second antenna array A driver circuit generates first and second drive signals for generation of the first and second wireless fields via the first and second antenna arrays, respectively The first wireless field is orthogonal with respect to the second wireless field The first antenna array and the driver circuit power the antenna coils of the first antenna array with alternating polarities The second antenna array and the driver circuit power the antenna coils of the second antenna array with alternating polarities

Wireless power orthogonal polarization antenna array

Systems and methods for employing switched phase shifters and a feed network to provide a low cost multiple beam antenna system for wireless communications. The present systems and methods may also facilitate multi-band communications and employ multi-diversity. The present systems and methods allow communication systems to achieve enhanced performance for communication or other services such as location tracking. The present systems and methods may employ switched phase shifters, multiple diversity antennas and/or a feed network having a multi-layer construction to provide an antenna system with low losses, low external component count and/or which is thin and compact.

Low cost multi-beam, multi-band and multi-diversity antenna systems and methods for wireless communications

An antenna for transmitting and receiving radio frequency energy. The antenna comprises a conductive radiator comprising a first and a second conductive region for providing a first and a second current path length. A feed conductor and a ground conductor operate as meanderline (or slow wave) elements to provide an electrical length longer than a physical length.

Low profile compact multi-band meanderline loaded antenna

A miniaturized ultra-wideband multifunction antenna comprising a conducting ground plane at the base, a plurality of concentric feed cables, one or more omnidirectional one-dimensional (1-D) normal-mode and two-dimensional (2-D) surface-mode traveling-wave (TW) radiators, frequency-selective internal and external couplers, and a unidirectional radiator on top, stacked and cascaded one on top of the other. Configured as a single structure, its unidirectional radiator and plurality of omnidirectional TW radiators can cover, respectively, most satellite and terrestrial communications, with unidirectional and omnidirectional radiation patterns, respectively, needed on various platforms. This new class of multifunction antenna is ultra-wideband, miniaturized and low-cost, thus attractive for applications on automobiles and other small platforms. As a multifunction antenna, a continuous bandwidth up to 1000:1 or more is reachable for terrestrial communications and a continuous bandwidth of 10:1 or more is feasible for satellite communications.

Miniaturized Ultra-Wideband Multifunction Antenna Via Multi-Mode Traveling-Waves (TW)

Disclosed is a broadband, miniaturized, slow-wave antenna (100) for transmitting and receiving radio frequency (RF) signals. The slow-wave antenna comprises a dielectric substrate (106) with a traveling wave structure mounted on one surface, and a conductive surface member (109) mounted on the opposite surface. The traveling wave structure, for example, is of the broadband planar type such as various types of spirals and includes conductive arms (123) which are coupled to feed lines (113) which are routed through the dielectric substrate and the conductive surface member for connection to a transmitter or receiver. The dielectric substrate is of a predetermined thickness which is, for example, less than 0.04μ1, where μ1 is the free space wavelength of the lowest frequency fl of the operating frequency range of the slow-wave antenna. Also, the dielectric constant of the dielectric substrate and the conductivity of the surface member are specified, along with the thickness of the dielectric substrate to ensure that a slow-wave launched in the traveling wave structure is tightly bound to the traveling wave structure, but not so tightly bound as to hinder radiation at a radiation zone of the traveling wave structure, while minimizing any propagation loss. The slow-wave antenna has a reduced phase velocity, which reduces the diameter of the radiation zone and, consequently, reduces the diameter of the slow-wave antenna.

Broadband miniaturized slow-wave antenna

A communication system can comprise an ordered arrangement or array of two sets, groups, or groups of antenna elements. The system can transmit or receive two bands or ranges of electromagnetic energy, signals, or radiation. The first set of the antenna elements can operate one of the bands, while the second set can operate the other band. The first set of antenna elements can be arranged or disposed to form a line or a column. The second set of antenna elements can be arranged or disposed on opposite sides of the line, with some of those elements on one side of the line and the remainder on the other side. The antenna elements that are on one side of the line can be staggered or longitudinally offset with respect to the antenna elements that are on the opposite side of the line.

Compact dual-band antenna system

A low-cost antenna array and method of manufacturing the array, in a planar form or in a structurally flexible or curved array structure are shown. The antenna array has a plurality of metallic antenna electrical and radiator elements formed on a foam core layer bonded onto a metallic ground layer. The radiator elements preferably are formed on a thin dielectric carrier layer bonded to the foam core layer. The array can include one or more additional dielectric layers, each with a plurality of parasitic radiator elements formed thereon, mounted on top of the electrical elements. Manufacturing the array preferably includes bonding the layers to one another. The electrical and radiator elements are formed, preferably by etching, before the foam core layer is bonded to the ground layer. The additional dielectric layer and the parasitic radiators then are bonded to the already formed electrical elements on the ground layer.

Low-cost antenna array

A compact antenna system can generate RF radiation fields having increased beamwidths and bandwidths. The antenna system can include one or more patch radiators separated from each other by an air dielectric and by relatively small spacer elements. The lower patch radiators can be mounted to a printed circuit board that can include an RF feed network and a ground plane which defines a plurality of symmetrically, shaped slots. The slots within the ground plane of the printed circuit board can be excited by stubs that are part of the feed network of the printed circuit board. The slots, in turn, can establish a transverse magnetic mode of RF radiation in a cavity which is disposed adjacent to the ground plane of the printed circuit board and a ground plane of the antenna system. The feed network of the printed circuit board can be aligned with portions of the cavity such that the portions of the cavity function as a heat sink for absorbing or receiving thermal energy produced by the feed network.

Method and system for increasing RF bandwidth and beamwidth in a compact volume

A dual-band antenna suitable for use in a cellular telephone network base station includes two parallel arrays of low-frequency dipole elements disposed on a ground plane, a raised array of high-frequency dipole elements disposed between the two parallel arrays, and at least one beamforming rod disposed between the raised array and the two parallel arrays. The two parallel arrays operatively form symmetric azimuth radiation patterns in a lower range of frequencies. The raised array and the high frequency beamforming rod likewise operatively form symmetric azimuth radiation patterns in a higher range of frequencies. This configuration of dual-band antenna allows reception and transmission of electromagnetic signals in two discrete frequency bands while occupying a compact space.

James K. Tillery

Papers

Broadband miniaturized slow-wave antenna

Compact dual-band antenna system

Low-cost antenna array

Method and system for increasing RF bandwidth and beamwidth in a compact volume

Linearly-polarized dual-band base-station antenna