A communication system applies impedance matching to an antenna specific to individual samples of a transmit signal. The system samples a signal and identifies the peak frequency content of each sample. Based on the peak frequency content, the system identifies an impedance match for a given antenna that provides the greatest energy transmission. The sampled portion of the signal is delayed to accommodate processing time to determine the impedance match and control settings. Control settings may be applied via discrete digital circuitry or continuous analog circuitry.

There is provided a printed antenna including a first conductive layer patterned to form two or more metal regions of a radiating element; a second conductive layer patterned to form at least one metal region of the radiating element, wherein the first conductive layer and the second conductive layer are separated by a dielectric; and a plurality of vias connecting the two or more metal regions on the first conductive layer to the at least one metal region on the second conductive layer to form a coil. There is also provided a wireless battery management system including the printed antenna and a method of forming a printed antenna thereof.

An antenna apparatus includes at least one antenna provided on a transparent titling surface inside a vehicle, and a partition to surround at least a portion of the at least one antenna. The partition tilts a beam radiated from the at least one antenna receiving a signal including a first frequency band, and transmits or receives a signal including a second frequency band, in the second frequency band different from the first frequency band.

An antenna apparatus includes at least one antenna provided on a transparent titling surface inside a vehicle, and a partition to surround at least a portion of the at least one antenna. The partition tilts a beam radiated from the at least one antenna receiving a signal including a first frequency band, and transmits or receives a signal including a second frequency band, in the second frequency band different from the first frequency band.

A housing assembly, an antenna assembly, and an electronic device are provided in the present disclosure. The housing assembly includes a dielectric substrate and a radio-wave transparent structure. The dielectric substrate has a first equivalent wave impedance to a radio frequency (RF) signal in a preset frequency band. The first equivalent wave impedance differs from a wave impedance of free space by a first difference. The radio-wave transparent structure is carried on and at least partially covers a portion of the dielectric substrate. The housing assembly has a second equivalent wave impedance to the RF signal in the preset frequency band in a region corresponding to the radio-wave transparent structure. The second equivalent wave impedance differs from the wave impedance of the free space by a second difference. The second difference is less than the first difference.

A housing assembly, an antenna assembly, and an electronic device are provided in the present disclosure. The housing assembly includes a dielectric substrate and a radio-wave transparent structure. The dielectric substrate has a first equivalent wave impedance to a radio frequency (RF) signal in a preset frequency band. The first equivalent wave impedance differs from a wave impedance of free space by a first difference. The radio-wave transparent structure is carried on and at least partially covers a portion of the dielectric substrate. The housing assembly has a second equivalent wave impedance to the RF signal in the preset frequency band in a region corresponding to the radio-wave transparent structure. The second equivalent wave impedance differs from the wave impedance of the free space by a second difference. The second difference is less than the first difference.

Ultra-wideband dual-band cellular dual-polarization base-station antennas and low-band radiators for such antennas are disclosed. The low-band radiator comprises a dipole and an extended dipole configured in a crossed arrangement, a capacitively coupled feed connecting the extended dipole to an antenna feed, and a pair of auxiliary radiating elements. The dipole comprises two dipole arms, each of approximately /4, for connection to the antenna feed. The extended dipole has anti-resonant dipole arms of approximately /2. The auxiliary radiating elements are configured in parallel at opposite ends of the extended dipole. The radiator is adapted for the frequency range of 698-960 MHz and provides a horizontal beamwidth of approximately 65 degrees. The dual-band base-station antenna comprises high-band radiators configured in at least one array and low-band radiators interspersed amongst the high-band radiators at regular intervals.

Ultra-wideband dual-band cellular dual-polarization base-station antennas and low-band radiators for such antennas are disclosed. The low-band radiator comprises a dipole and an extended dipole configured in a crossed arrangement, a capacitively coupled feed connecting the extended dipole to an antenna feed, and a pair of auxiliary radiating elements. The dipole comprises two dipole arms, each of approximately /4, for connection to the antenna feed. The extended dipole has anti-resonant dipole arms of approximately /2. The auxiliary radiating elements are configured in parallel at opposite ends of the extended dipole. The radiator is adapted for the frequency range of 698-960 MHz and provides a horizontal beamwidth of approximately 65 degrees. The dual-band base-station antenna comprises high-band radiators configured in at least one array and low-band radiators interspersed amongst the high-band radiators at regular intervals.

A communication device includes a ground plane and an antenna element. The antenna element includes a radiation metal strip and a feed metal line. The feed metal line is disposed between the radiation metal strip and the ground plane. A first metal strip of the radiation metal strip has a first end electrically connected to the ground plane by a first metal section. A second metal strip of the radiation metal strip has a second end electrically connected to the ground plane by a second metal section. The first metal strip is coupled to a first connection point on the feed metal line through a first capacitive element. The second metal strip is coupled to a second connection point on the feed metal line through a second capacitive element. The feed metal line has a third connection point as a feeding point of the antenna element.

A square bracket-shaped radiation element is in a non-ground region of a board. A first reactance element that equivalently enters a short-circuited state in a second frequency band is connected between a second end of the radiation element and a ground conductor. A second reactance element that equivalently enters a short-circuited state in a first frequency band s connected between a first end of the radiation element and the ground conductor. In the UHF band, the radiation element and the ground conductor function as an inverted F antenna that contributes to field emission. In the HF band, a loop including the radiation element and the ground conductor functions as a loop antenna that contributes to magnetic field emission.