The present invention relates to a pair of pure wireless earphones using optimal monopole antennae in the technical field of communications, comprising in-ear type earphone housings and RF signal generation devices disposed in the in-ear type earphone housings, wherein positioning stages matched with the shape of auricular concha cavities are at the tops of bottom housings; each RF signal generation device consists of an antenna, a main PCB and a battery; each antenna is used for establishing an RF communication link with an audio source and a secondary earpiece; and a ball is drawn with each antenna as a center point and the outer wall of the corresponding in-ear type earphone housing closest to the antenna as a radius to form a space as an antenna holding area in which the antenna is located, and the radius of the ball is greater than 4 mm. When a distance between each antenna and the skin or tissues of a human body is greater than 4 mm, an optimal coupling can be formed therebetween to possibly create an optimal RF creeping wave communication link, the antenna gain and efficiency attenuation of an in-ear type Bluetooth device is within an acceptable range, and the antenna can also maintain a proper RF communication link between a primary earpiece and a mobile phone.

Systems and methods for improving an efficiency and a gain of a helical antenna. The methods comprise: configuring a conductive helix element of the helical antenna to comprise a proximal segment having a helical winding that extends along an axis of the conductive helix element and has a plurality of turns with linearly progressing pitch angles; configuring the conductive helix element to comprise a distal segment having a helical winding that extends along the axis of the conductive helix element and has a constant pitch angle; and coupling the distal segment to the proximal segment in a series arrangement so that a radio wave reaches a terminal velocity at a point of the coupling.

An ear-worn electronic device is configured to be worn by a wearer and comprises a housing configured to be supported at, by, in or on the wearer's ear. A processor is disposed in the housing, and a speaker or a receiver is operably coupled to the processor. A radio frequency transceiver is disposed in the housing and operably coupled to the processor. A battery/antenna module is disposed in the housing and comprises a battery, a helical antenna wrapped around the battery, and electrically insulating material disposed between the helical antenna and the battery. The helical antenna is operably coupled to the transceiver.

The present disclosure is directed to a seeker system having an infrared (IR) sensor pedestal, an IR sensor disposed on the IR pedestal and a plurality of radio frequency (RF) antenna elements symmetrically disposed in a circumferential direction around the IR sensor pedestal. The seeker system further includes a plurality of RF waveguiding structures. In an embodiment, each of the RF waveguiding structures have first and second ends and are symmetrically disposed in a circumferential direction around the IR sensor pedestal such that in response to an RF signal incident on a first end of the waveguiding structure, the RF signal is provided to one of the plurality of RF antenna elements such that in response to an RF signal incident on the seeker system from any direction, each of the plurality of RF antenna elements receive the RF signal with a desired phase characteristic.

A multiband antenna apparatus for high-precision GNSS positioning is proposed. The multiband antenna apparatus comprises a first antenna configured for reception of GNSS signals in a first multiband of electromagnetic spectrum, a second multiband antenna configured for reception of GNSS signals in a second multiband of electromagnetic spectrum, and an antenna phase reference point configured to represent an integrated electric phase data. The antenna phase reference point is related to a physical reference point of the antenna apparatus.

The present invention relates to systems, methods, and devices for consumers using RFID-tagged items for multichannel shopping using smartphones, tablets, and indoor navigation, preservation of consumer's privacy related to RFID-tagged items that they leave a retail store with, and automatically reading and locating retail inventory without directly using store labor. Robots and aerial mobile automated RFID reading devices are disclosed.

Systems, devices, and methods for providing deployable and collapsible Quadrifilar Helical Antennas (QHA) on small satellites to improve communications in low earth orbit satellites. Monopole antennas are very popular for use on small satellites, generally because they are relatively easy to attach. By using circularly polarized antennas for the spacecraft and the ground station, polarization losses are virtually eliminated. The QHA can be designed to have a wide range of circularly polarized antenna patterns. Low power transmitters are employed on the small satellite to be consistent with the available energy. The communication link budgets are dependent on good radiation pattern characteristics for the small satellite downlink where higher data rates are required. Quadrifilar Helical Antennas can be collapsed and stowed inside a module to mount inside typical cubes known as 1U through 27U size small satellites. After launch from the rocket, the QHA can be deployed to its stored memory shape. The QHA radiating filars can be made from Nitinol wires having an activation temperature above which the filars resume their stored memory shape acquired during heating treatments. QHA applies an electrical direct current onto the filars after launch of the small satellite independent of the radio frequency of the QHA.

An antenna device includes an insulating substrate, a coil antenna including a helically wound coil conductor and at least two mounting electrodes conducted to the coil conductor, and a wiring conductor disposed on the substrate and including connection portions connected to the mounting electrodes of the coil antenna. The wiring conductor includes a first wiring conductor parallel extending portion and a second wiring conductor parallel extending portion, and directions of currents flowing through the first wiring conductor parallel extending portion and the second wiring conductor parallel extending portion are opposite to each other with respect to a direction of a current flowing through the coil conductor.

A radio frequency antenna for radiating electromagnetic energy into a reservoir filled with a target material, the antenna being operatively connected to a feed transmission line. The antenna includes a waveguide, at least one slot formed in the outer waveguide layer, and a sleeve portion enclosing at least a portion of the waveguide. The sleeve portion comprises at least first and second dielectric layers where the permittivity of the second dielectric layer is higher than the permittivity of the first dielectric layer and the first dielectric layer is positioned in closer proximity to the waveguide than the second dielectric layer. When the antenna is inserted into the reservoir, the input impedance of the antenna remains matched to the feed transmission line for a wide range of target materials.

An antenna includes a plurality of upper electrodes in a first metal layer, a plurality of lower electrodes in a second metal layer, a plurality of side electrodes connecting the upper electrodes with the lower electrodes, and a ground structure. The upper electrodes, the lower electrodes and the side electrodes form one continuous electrode. The continuous electrode extends in a first direction away from a reference plane over a substrate. The upper electrodes extend in a second direction different from the first direction. The upper electrodes, the lower electrodes, and the side electrodes are embedded within a waveguide structure that includes a dielectric material. The substrate has a length extending in the first direction greater than a length the continuous electrode extends in the first direction. The waveguide structure includes a portion of the substrate in a region beyond the length of the continuous electrode in the first direction.