An antenna comprises a coil element, a first metallic plate element, a second metallic plate element and terminals. The first metallic plate element and the second metallic plate element each have the shape of a triangle or an isosceles trapezoid. Further, the first metallic plate element and the second metallic plate element are mirror symmetric with respect to a symmetry plane that is perpendicular to the longitudinal direction. The antenna provides a wider area of use at small size and can thus be used for different transmission technologies, such as NFC and UWB.

A multi-mode composite antenna includes two crossed dipole elements each consisting of a bow-tie antenna having two bow-tie antenna segments, and a conductive tube which houses signal transmission lines connected to each bow-tie antenna segment. A conductive flared portion surrounds the conductive tube and forms a monopole element. The bow-tie antenna segments are shaped so that slots extend between each adjacent bow-tie antenna, each slot forming a tapered slot antenna that has a pair of non-linear curved edges that diverge from each other.

An antenna is described. This antenna includes: a ground plane; and antenna elements that are positioned in a first horizontal plane offset along a vertical direction from the ground plane. Moreover, the antenna elements are configured to generate a beam having a horizontal polarization. Furthermore, the antenna includes a planar reflector that is positioned in a second horizontal plane offset along the vertical direction from the first ground plane, so that the antenna elements are positioned between the ground plane and the planar reflector. During operation, a first reflection from the ground plane, the beam from the antenna elements, a second reflection from the planar reflector and diffractions from edges of the ground plane and the planar reflector combine to generate an antenna radiation pattern having a main beam approximately in a horizontal direction, e.g., at 10-15 from the horizontal direction.

A sensor has an antenna. The antenna includes a radiation source and a wave guide. The radiation source is formed on a substrate. The wave guide internally propagates electromagnetic waves radiated from the radiation source and radiates the electromagnetic waves as a beam. The wave guide has a radiation-side opening in which a first direction and a second direction are orthogonal to each other, and the second direction is longer than the first direction. In a cross-sectional shape of the beam, perpendicular to a radiation direction of the beam radiated from the wave guide, a first direction and a second direction are orthogonal to each other, and the second direction is narrower than the first direction.

A sensor has an antenna. The antenna includes a radiation source and a wave guide. The radiation source is formed on a substrate. The wave guide internally propagates electromagnetic waves radiated from the radiation source and radiates the electromagnetic waves as a beam. The wave guide has a radiation-side opening in which a first direction and a second direction are orthogonal to each other, and the second direction is longer than the first direction. In a cross-sectional shape of the beam, perpendicular to a radiation direction of the beam radiated from the wave guide, a first direction and a second direction are orthogonal to each other, and the second direction is narrower than the first direction.

An antenna comprises a first antenna element, a second antenna element and a fractal element having a first fractal element end, a central fractal element length and a second fractal element end. The first antenna element, the second antenna element and the fractal element are situated in a tapered slot antenna pair configuration along a longitudinal axis. The fractal element is directly coupled to, and forms an electrical connection between, the first antenna element and the second antenna element at a location between a lowest operating frequency phase center and the launch end. The first fractal element end is coupled to the first antenna element. The second fractal element end is coupled to the second antenna element. The central fractal element length is disposed so as to be non-parallel with the longitudinal axis.

A radar system and method for determining location of targets, wherein the energy reflected from an object is received by the omnidirectional antenna elements and the received RF signal is downconverted to an intermediate frequency (IF) signal. The IF signals are digitized. The digitized IF signals received at the first omnidirectional antenna are digitally processed so as to form modal beams with opposite phase slope as output signals. The digitized IF signal received at the second omnidirectional antenna is digitally processed as to form a reference signal of phase reference. Phase differences between the signals and the reference signals are determined, such that each phase difference includes a first component proportional to the azimuth of the arriving signal and a second component corresponding to the elevation of the arriving signal, from which the azimuth and the elevation of the arriving signal can be extracted.

A deployable manpack antenna assembly comprises a transceiver antenna unit, a first support rod, a flexible conduit connector, a second support rod, a base unit, a latching unit, a clamping unit, and at least two sleeve retainer stops. The deployable manpack antenna assembly is configured for use in military applications, particularly relating to ground-party communications systems intended to be used in both communications-at-the-halt (CATH) and communications-on-the-move (COTM). The manpack antenna assembly operates in Ku, K and Ka bands for soldiers in the battlefield. The manpack antenna assembly comprises one of the two antennas, a biconical variant antenna, or an inverted-F variant antenna, both of which operate at Ku-band, K-band, and Ka-band simultaneously. The manpack antenna assembly boasts several features, including antenna deployment from folded to unfolded configurations, compact size, low mass, near 4 steradians coverage, low cost, wide bandwidth performance, and built-in radome for protection from severe environmental conditions.

A deployable manpack antenna assembly comprises a transceiver antenna unit, a first support rod, a flexible conduit connector, a second support rod, a base unit, a latching unit, a clamping unit, and at least two sleeve retainer stops. The deployable manpack antenna assembly is configured for use in military applications, particularly relating to ground-party communications systems intended to be used in both communications-at-the-halt (CATH) and communications-on-the-move (COTM). The manpack antenna assembly operates in Ku, K and Ka bands for soldiers in the battlefield. The manpack antenna assembly comprises one of the two antennas, a biconical variant antenna, or an inverted-F variant antenna, both of which operate at Ku-band, K-band, and Ka-band simultaneously. The manpack antenna assembly boasts several features, including antenna deployment from folded to unfolded configurations, compact size, low mass, near 4 steradians coverage, low cost, wide bandwidth performance, and built-in radome for protection from severe environmental conditions.

An antenna unit and an antenna. The antenna may consist essentially of a first hollow truncated cone; and a first inverted hollow truncated cone. The first hollow truncated cone comprises a first base and a first top end. The first inverted hollow truncated cone comprises a second base and a second top end. A radius of the first base may exceed a radius of the second base. The he first top end faces the second top end. The first hollow truncated cone may be spaced apart from the first inverted hollow truncated cone and is electrically isolated from the first inverted truncated cone.