Abstract: 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.

Abstract: 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.

Abstract: A multi-mode composite antenna is disclosed. The antenna includes at least two dipole elements, each dipole element having two arms with a signal transmission line connected to each arm, a conductive tube in which the signal transmission lines extend which forms a shield for the signal transmission lines, and an extension of the conductive tube. In one embodiment, the extension is formed by the conductive tube being folded back over itself. The dipole elements are capable of being excited by at least one differential mode excitation to realize a dipole radiation pattern, and the extension forms a monopole element with a monopole radiation pattern when at least one dipole element is excited by a common mode excitation. The composite antenna is capable of a combined monopole and dipole radiation pattern through the application of both differential mode excitation and common mode excitation.

Abstract: A multi-mode composite antenna is disclosed. The antenna includes at least two dipole elements, each dipole element having two arms with a signal transmission line connected to each arm, a conductive tube in which the signal transmission lines extend which forms a shield for the signal transmission lines, and an extension of the conductive tube. In one embodiment, the extension is formed by the conductive tube being folded back over itself. The dipole elements are capable of being excited by at least one differential mode excitation to realize a dipole radiation pattern, and the extension forms a monopole element with a monopole radiation pattern when at least one dipole element is excited by a common mode excitation. The composite antenna is capable of a combined monopole and dipole radiation pattern through the application of both differential mode excitation and common mode excitation.