Example embodiments are directed to systems and methods for denying power to unauthorized power loads within a spherical waveguide bounded by the Earth's surface. One or more eigenmodes of the Earth-ionosphere waveguide may be computed based on a mathematical model incorporating electrical properties of the terrestrial surface and plasma physics of the ionosphere. A phased array of wave guide couplers, each including an array of electrically-connected waveguide-coupling elements, may be configured at different geographic locations for coupling to the one or more eigenmodes and generating standing waves in the Earth-ionosphere waveguide. Power loads may be detected via power reflections, and power nodes and nulls of the standing waves may be steered with respect to specified locations by adjusting relative phases and/or amplitudes of the waveguide couplers. Locations of power loads may be triangulating reflections. Power nulls of the standing waves may be steered to locations of unauthorized power loads.

The present disclosure provides a wireless communication antenna structure for both heat dissipation and radiation which includes: an inside helical pattern including an inside start end and an inside tail end; an outside helical pattern including an outside start end and an outside tail end; a heat dissipating/radiating metal layer including one side metal region and the other side metal region; and a plurality of via holes respectively connecting, up and down, the inside tail end and the one side metal region, and the outside start end and the other side metal region, so that the inside helical pattern, the heat dissipating/radiating metal layer and the outside helical pattern are connected in sequence to be a helical type. The present disclosure also implements heat dissipation of various components inside a portable terminal while implementing better near field wireless communication.

A transmitter or transceiver assembly includes at least one transmitter module. The transmitter module includes a matrix of transmitter integrated circuit die and a matrix of antennas, each antenna being coupled to a respective transmitter integrated circuit die. The matrix of antennas is configured to reduce interaction between signals transmitted by respective ones of the antennas.

This invention is directed to antenna for wireless charging systems configured and operable to create strong electromagnetic near fields in a designated volume and by that to improve the coupling between a transmitting antenna and a receiving antenna of a wireless charging system, which improves the efficiency level of the electromagnetic energy transfer between said transmitting and receiving antennas of a wireless charging system, the antenna comprising a conductive material shaped to form two or more revolutions, each revolution adjacent to the previous revolution, wherein each of said revolution having a geometric shape. The antenna is further comprising a ground plane, wherein said formed conductive material is adapted to confine the electromagnetic near field distribution into a charging zone relative to the ground plane.

An antenna device includes: a first terminal to which a high-frequency signal is input; a second terminal connected to the ground; a first radiation unit that is formed in a helical shape whose maximum diameter is a first diameter; a second radiation unit that is formed in a helical shape having one end continuous with one end of the first radiation unit and whose maximum diameter is a second diameter larger than the first diameter, and having another end which is an open end; first wiring that connects another end of the first radiation unit and the first terminal; and second wiring that connects the another end of the first radiation unit and the second terminal.

A hearing aid, in particular an in-the-ear hearing aid, includes a device housing having a housing shell insertable into an auditory canal and a housing front plate closing the housing shell. A battery is accommodated in the device housing. A signal processing device having a ground plane is disposed at least in sections between the battery and the housing front plate. An antenna device, having at least two folded antenna arms, is disposed between the ground plane and the housing front plate. The antenna arms extend as three-dimensional spirals or helices along a height direction perpendicular to the ground plane, and have at least one turn or pitch. The antenna arms are electrically connected to one another by antenna poles spaced apart from the ground plane.

A radio frequency transmission system and methods for mitigating multipath radio frequency interference are disclosed. Embodiments include a first helical antenna having a first radius and operable to receive a first electromagnetic signal, and a second helical antenna having a second radius and operable to receive a second electromagnetic signal. Further embodiments include a phase adjuster configured to receive the first electromagnetic signal as an input signal, apply an adjustable phase delay to the input signal, and output an adjusted electromagnetic signal. Still further embodiments include a signal combiner configured to receive the adjusted electromagnetic signal and the second electromagnetic signal and output a combined electromagnetic signal.

A helical antenna structure for use in an electrosurgical instrument. The helical antenna structure is connectable to inner and outer conductors of a coaxial transmission line, and can act as both a radiating antenna or applicator structure, and also in a mode where an electric field is generated between its electrodes. In this way, the helical antenna structure may be used both for argon plasma coagulation, and deep tissue coagulation, as well as providing means for delivering a fluid, e.g. a therapeutic fluid such as adrenaline. This may be achieved through the use of helically arranged electrodes and a channel for gas to flow. This device is also used to deliver adrenaline and RF/microwave energy.

An antenna comprises an axial helical radiating element and a corrugated ground plane. The axial helical radiating element provides a radiation pattern substantially parallel to a primary axis of rotation of the helical radiating element. The corrugated ground plane, disposed proximate to a back region of the antenna, comprises corrugations to increase an electrical length of travel for radial standing waves between an axial helical input, at which the axial helical radiating element is coupled to the corrugated ground plane, to an outer edge of the corrugated ground plane.

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.