摘要:
An ultra-wideband antenna assembly comprising: an electromagnetic reflective structure for reflecting electromagnetic waves; the electromagnetic reflective structure operating to reflect electromagnetic waves in a first direction; an antenna operatively associated with the electromagnetic reflective structure such that electromagnetic waves emitted from the antenna towards the electromagnetic wave reflective structure are reflected back by the electromagnetic reflective structure in the first direction; the antenna being substantially planar and extending in a first plane; the first direction being substantially perpendicular to the first plane; and at least one director operatively associated with the antenna for focusing the electromagnetic waves transmitted by the antenna in the first direction; the at least one director being substantially planar and extending in a second plane wherein the second plane is substantially parallel to the first plane.
摘要:
An antenna arrangement of an electronic device and a device is disclosed. The antenna arrangement includes two radiator elements. The first radiator element of the two radiator elements is connected to a feed element. A second radiator element of the two radiator elements is a passive element and connected to a ground plane. The first radiator element is arranged to feed the second radiator element by radiating energy.
摘要:
A wideband antenna system with multiple antennas and at least one parasitic element is disclosed. In an exemplary design, an apparatus includes a first antenna, a second antenna, and a parasitic element. The first antenna has a shape of an open-ended loop with two ends that overlap and are separated by a gap. The second antenna may also have a shape of an open-ended loop with two ends that overlap and are separated by a gap. The parasitic element is located between the first and second antennas. The first and second antennas may be placed side by side on a board, located at either the top end or the bottom end of a wireless device, and/or formed on opposite sides (e.g., the front and back sides) of the board. The parasitic element may be formed on a plane that is perpendicular to the plane on which the first and second antennas are formed.
摘要:
Disclosed herein are various exemplary embodiments of multi-band, wide-band antennas. In exemplary embodiments, the antenna generally includes an upper portion and a lower portion. The upper portion includes two or more upper radiating elements and one or more slots disposed between the two or more upper radiating elements. The lower portion includes three or more lower radiating elements and one or more slots disposed between the three or more lower radiating elements. A gap is between the upper and lower portions such that the upper radiating elements are separated and spaced apart from the lower radiating elements. The antenna may be configured such that coupling of the gap and the upper and lower radiating elements enable multi-band, wide-band operation of the antenna within at least a first frequency range and a second frequency range, with the upper radiating elements operable as a radiating portion of the antenna, the lower radiating elements operable as a ground portion, and the gap operable for impedance matching.
摘要:
A base station antenna array comprises a ground plane and a parallel array of antennas above the ground plane. The antennas each have a progression of radiating elements whose length increases in a direction away from the ground plane. A feed is connected to the antenna at a point nearest the ground plane.
摘要:
An ultra wide band (UWB) antenna includes: a planar cap portion that is parallel to a ground plane; a tapered portion that extends vertically away from the cap portion and toward the ground plane and that forms a cavity vertically between a bottom surface of the tapered portion and the ground plane; and a side portion that extends vertically from the cap portion toward the ground plane and that electrically connects to a feed at a point that is vertically above the cavity.
摘要:
A vehicle communication device includes a first antenna, a second antenna, and an isolation circuit. The first antenna is configured to emit and detect a first signal and the second antenna is configured to emit and detect a second signal. The isolation circuit is configured to isolate the first signal and the second signal from each other. The isolation circuit includes at least one resonator arranged between the first antenna and the second antenna. The first antenna and the resonator are separated by a first distance along a first axis, and the second antenna and the resonator are separated by a second distance along the first axis, where the first distance is shorter than the second distance.
摘要:
Reconfigurable intelligent surfaces (RISs) are an emerging transmission technology to aid wireless communication. However, the potential of using RIS to mitigate directed energy weapons (DEW) is not widely recognized. Described herein are RIS (based on spiral antenna elements) to aid the mitigation of high-energy radio-frequency (RF) sources applied to a DEW. For example, integrating a broadband circularly-polarized antenna system with RIS technology can successfully mitigate DEW attacks across a wide range of frequencies regardless of how radio waves are polarized. A spiral antenna is simulated that operates between 1.3 GHz and 7 GHz with a 3-dB axial ratio bandwidth (ARBW) covering 2 GHz-7 GHz. Full-wave simulation results show the potential promising application of RIS for the mitigation of DEW attacks.
摘要:
According to an embodiment of the present disclosure, an electronic device may include: a housing; an antenna structure positioned in the housing and including a printed circuit board, multiple first antenna elements, multiple second antenna elements, and multiple electrical paths; and a wireless communication circuit electrically connected to the multiple first antenna elements through the electrical paths, wherein: the printed circuit board includes a first surface oriented in a first direction and a second surface oriented in a second direction opposite to the first direction; the multiple first antenna elements are positioned in the printed circuit board on the first surface or to be closer to the first surface than the second surface, configured to generate circular polarization, and include, when seen from above the first surface, a first border and a third border spaced apart from each other and extending in parallel to each other, a second border and a fourth border spaced apart from each other by a distance between the first border and the third border, extending in parallel to each other, and disposed to be perpendicular to the first border or the third border, and multiple first notches formed on the first border, the second border, the third border, and the fourth border and arranged at a 90-degree angle with reference to a center of each of the multiple first antenna elements; the multiple second antenna elements are positioned in the printed circuit board to be closer to the second surface than the multiple first antenna elements, overlap with, when seen from above the first surface, the multiple first antenna elements one-to-one, configured to generate circular polarization, and include, when seen from above the first surface, a fifth border and a seventh border spaced apart from each other and extending in parallel to each other, a sixth border and an eighth border spaced apart from each other by a distance between the fifth border and the seventh border, and disposed to be perpendicular to the fifth border or the seventh border, and multiple second notches formed on the fifth border, the sixth border, the seventh border, and the eighth border, arranged at a 90-degree angle with reference to the center, and overlapping with at least some of the multiple first notches one-to-one; and the multiple electrical paths are positioned on the printed circuit board and include multiple conductive vias electrically connected to the multiple first antenna elements; the printed circuit board includes a first conductive layer including the multiple first antenna elements, a second conductive layer including the multiple second antenna elements, a first dielectric positioned between the first conductive layer and the second conductive layer, a third conductive layer configured to electrically connect the multiple conductive vias to the wireless communication circuit and positioned in the printed circuit board to be closer to the second surface than the second conductive layer, a fourth conductive layer including a ground plane and positioned in the printed circuit board to be closer to the second surface than the third conductive layer, and a second dielectric positioned between the third conductive layer and the fourth conductive layer and having a greater dielectric constant than the first dielectric; each of the multiple second antenna elements includes a hole; each of the multiple conductive vias is positioned to extend through the hole; the multiple second antenna elements are configured to be indirectly fed by the multiple conductive vias; and the multiple first notches have different shapes from the multiple second notches.
摘要:
A multiband printed antenna includes a radiator arranged on an upper portion and one end of a circuit board, and a grounding body. The radiator includes a feed-in part, a first radiation part straightly extended rightward from an upper section of a first right edge of the feed-in part, and a second radiation part sequentially extended rightward, then extended upward, later extended leftward, and further extended downward from a lower section of the first right edge of the feed-in part. The grounding body is arranged on a lower portion of the circuit board. The grounding body is positioned adjacent to a lower portion of a second right edge of the radiator. The grounding body is separated from the radiator.