An active biconical antenna and a receive array comprising a combination of active biconical and Vivaldi antennas. In one configuration, the active biconical antenna includes upper and lower cones. Each cone has a respective truncated apex. First and second feed points are respectively connected to the truncated apexes of the upper and lower cones and to first and second conductors. The active biconical antenna further includes a buffer amplifier having respective input terminals connected to the first and second conductors. The buffer amplifier has an input impedance that is impedance matched to an antenna impedance at and above but not below a frequency f.sub.c and is higher than the antenna impedance at frequencies substantially less than f.sub.c. The buffer amplifier also has an output impedance that is impedance matched to a system impedance at frequencies both above and below f.sub.c. A length of the first and second conductors is less than a wavelength at the frequency f.sub.c.

An active biconical antenna and a receive array comprising a combination of active biconical and Vivaldi antennas. In one configuration, the active biconical antenna includes upper and lower cones. Each cone has a respective truncated apex. First and second feed points are respectively connected to the truncated apexes of the upper and lower cones and to first and second conductors. The active biconical antenna further includes a buffer amplifier having respective input terminals connected to the first and second conductors. The buffer amplifier has an input impedance that is impedance matched to an antenna impedance at and above but not below a frequency f.sub.c and is higher than the antenna impedance at frequencies substantially less than f.sub.c. The buffer amplifier also has an output impedance that is impedance matched to a system impedance at frequencies both above and below f.sub.c. A length of the first and second conductors is less than a wavelength at the frequency f.sub.c.

A deformed dipole is suggested with trace elements configured for wideband LTE and GPS operation. The deformed dipole comprises a first dipole conductor disposed on a first surface and first side of the circuit board and a second dipole conductor disposed on an opposite surface and opposite side of the circuit board.

An antenna includes a conductive antenna body having first and second opposing ends with an enlarged width medial portion therebetween. A slot extends from at least adjacent the first end to at least adjacent the second end, and first antenna feed points are adjacent the slot for a first polarization. A conductive antenna member is adjacent the second end of the conductive antenna body and has a planar shape and a second antenna feed point for a second polarization.

An antenna includes a conductive antenna body having first and second opposing ends with an enlarged width medial portion therebetween. A slot extends from at least adjacent the first end to at least adjacent the second end, and first antenna feed points are adjacent the slot for a first polarization. A conductive antenna member is adjacent the second end of the conductive antenna body and has a planar shape and a second antenna feed point for a second polarization.

Embodiments of the present disclosure relate to a biconical antenna assembly for electromagnetic compatibility testing. The biconical antenna assembly has an antenna feeding point, a first antenna structure and a second antenna structure. The first antenna structure and the second antenna structure extend from the antenna feed point towards opposite directions. The biconical antenna assembly includes at least one additional capacitive structure that is attached to a most distal point of the first antenna structure or the second antenna structure from the antenna feed point.

A geodesic antenna includes an outer cone. The geodesic antenna also includes an inner cone positioned partially within the outer cone and, together with the outer cone, defining an electromagnetic waveguide. The geodesic antenna further includes multiple driven elements configured to generate electromagnetic waves in a space between the outer and inner cones. In addition, the geodesic antenna includes a ground plane configured to reflect first electromagnetic waves of the generated electromagnetic waves back into the space between the outer and inner cones. The ground plane has a geometric design that prevents at least some second electromagnetic waves of the generated electromagnetic waves from being reflected from the ground plane and forming an interferometer pattern.

An apparatus for mitigating element pattern ripple includes an inner cone, an outer cone, at least one driven element, and at least one director. The outer cone is coupled to the inner cone. The at least one driving element is coupled to the outer cone and is configured to produce at least one primary ray. The at least one director is coupled to the outer cone and is configured to direct the at least one primary ray. The inner cone and the outer cone may be concentric. The at least one driven element may include multiple driven elements. The at least one director may include multiple directors. A number of directors may be equal to a number of driven elements.

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.

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.