Antenna systems have a substrate and antenna on the substrate, where the antenna has a plurality of leg elements. The plurality of leg elements comprises a conductive ink and forms a continuous path. At least one of the plurality of leg elements is individually selectable or de-selectable to change a resonant frequency of the antenna, and leg elements that are selected create an antenna path length corresponding to the resonant frequency. In some embodiments, the antennas are energy harvesters.

The wireless communication device has a first radiation element, which includes a first line path being extended between a first end and a second end and performs communication at a first frequency. The device also has a second radiating element coupled to the first radiating element and resonating at a second frequency, which element has a second line path extending from a first connecting portion connected to the sheet metal to a third end portion near the first end portion, and a third path line extending from an intermediate point between the first connecting portion and the third end portion to the fourth end portion. And a power supply circuit for a third frequency is connected to the fourth end via a cutoff circuit which cuts off the second frequency. With this configuration, the wireless communication device enables the communication in more frequency bands.

The wireless communication device has a first radiation element, which includes a first line path being extended between a first end and a second end and performs communication at a first frequency. The device also has a second radiating element coupled to the first radiating element and resonating at a second frequency, which element has a second line path extending from a first connecting portion connected to the sheet metal to a third end portion near the first end portion, and a third path line extending from an intermediate point between the first connecting portion and the third end portion to the fourth end portion. And a power supply circuit for a third frequency is connected to the fourth end via a cutoff circuit which cuts off the second frequency. With this configuration, the wireless communication device enables the communication in more frequency bands.

An object of the present invention is to provide an antenna device having a wide beam scan range with reduced loss. The antenna device according to one aspect of the present invention includes: a first phase shifter, a second phase shifter, and a third phase shifter; a first connection part that electrically connects between the first phase shifter and the second phase shifter directly in series; a second connection part that electrically connects between the second phase shifter and the third phase shifter directly in series; and a power feed part that feeds electric power to the first phase shifter to the third phase shifter, wherein the first phase shifter and the second phase shifter, and the second phase shifter and the third phase shifter respectively have characteristic impedance being discontinuous with respect to each other at the first connection part and the second connection part.

A system with one or more transceiver antenna assemblies for installation in vehicle side-view mirrors to enable communication with nearby vehicles. Each transceiver antenna assembly may have one or two antenna arrays implemented on a single printed circuit board, protected by an antenna housing used to mount the transceiver antenna inside the mirror assembly. Each antenna array in a dual-channel transceiver antenna may transmit and receive data over one of two DSRC channels. One channel may be used to transmit and receive vehicle data only and the other channel may be used to transmit and receive both vehicle data and audio/video (A/V) data. Each antenna array is connected to a radio in the vehicle that processes received signals and prepares signals for transmission. Such a transceiver antenna system may be especially useful for communication in truck platooning.

A long range low frequency antenna having an elongated magnetic core; a coil surrounding the elongated magnetic core; a bobbin; where the elongated magnetic core is introduced in a cavity of the bobbin; and a housing overmolded on the bobbin in a waterproof manner. The antenna also comprises at least one damper located at one extreme of the elongated magnetic core. The at least one damper is made of an elastic and thermally-stable compound having a resin and a first filler including a natural mineral filler. Therefore, longitudinal dilatations, shrinkage, mechanical shocks, and vibrations of the elongated magnetic core are absorbed by the at least one damper, avoiding an impact over an inductance variation of the coil.

A long range low frequency antenna having an elongated magnetic core; a coil surrounding the elongated magnetic core; a bobbin; where the elongated magnetic core is introduced in a cavity of the bobbin; and a housing overmolded on the bobbin in a waterproof manner. The antenna also comprises at least one damper located at one extreme of the elongated magnetic core. The at least one damper is made of an elastic and thermally-stable compound having a resin and a first filler including a natural mineral filler. Therefore, longitudinal dilatations, shrinkage, mechanical shocks, and vibrations of the elongated magnetic core are absorbed by the at least one damper, avoiding an impact over an inductance variation of the coil.

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

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

An antenna structure includes a radiative antenna element disposed in a first conductive layer, a reflector ground plane disposed in a second conductive layer under the first conductive layer, a feeding network comprising a transmission line disposed in a third conductive layer under the second conductive layer, and at least one coupling element disposed in proximity to a feeding terminal that electrically couples one end of the transmission line to the radiative antenna element. The coupling element is capacitively coupled with the feeding terminal.