Abstract: A conductive member may include a conductor having a pair of opposed parallel surfaces and a cable guide arranged inside the conductor. In another embodiment, a conductive member may include a conductive bar having a pair of opposed parallel surfaces and a convex surface connecting respective first ends of the pair of opposed parallel surfaces to one another. An embodiment of a method for forming a conductive member includes forming a cable guide arranged inside a conductor having opposed parallel surfaces, where the cable guide is oriented in a direction substantially parallel to the opposed parallel surfaces. In an embodiment of an antenna, the antenna includes a conductor having a pair of opposed lateral surfaces, and a cable guide arranged inside the conductor and oriented in a direction substantially parallel to that of the opposed parallel surfaces.

Abstract: A conductive member may include a conductor having a pair of opposed parallel surfaces and a cable guide arranged inside the conductor. In another embodiment, a conductive member may include a conductive bar having a pair of opposed parallel surfaces and a convex surface connecting respective first ends of the pair of opposed parallel surfaces to one another. An embodiment of a method for forming a conductive member includes forming a cable guide arranged inside a conductor having opposed parallel surfaces, where the cable guide is oriented in a direction substantially parallel to the opposed parallel surfaces. In an embodiment of an antenna, the antenna includes a conductor having a pair of opposed lateral surfaces, and a cable guide arranged inside the conductor and oriented in a direction substantially parallel to that of the opposed parallel surfaces.

Abstract: The present invention provides a metrology antenna system that combines a sleeve dipole antenna having two coaxial input ports with a balancing network. This combination (1) minimizes or eliminates spurious radiation from the balancing network (2) provides for a symmetric pair of feed regions which may be made arbitrarily small, and (3) provides for an essentially perfect impedance match to a broad range of resistive source impedances. The present invention provides a fabrication of arbitrarily small feed regions such that dipoles can be realized at high frequencies at little manufacturing cost.

Abstract: The present invention provides a metrology antenna system that combines a sleeve dipole antenna having two coaxial input ports with a balancing network. This combination (1) minimizes or eliminates spurious radiation from the balancing network (2) provides for a symmetric pair of feed regions which may be made arbitrarily small, and (3) provides for an essentially perfect impedance match to a broad range of resistive source impedances. The present invention provides a fabrication of arbitrarily small feed regions such that dipoles can be realized at high frequencies at little manufacturing cost.

Abstract: An antenna includes a conductive loop with multiple feed points spaced around the loop. The loop may be opened at each feed point, thereby forming multiple loop portions. In an embodiment, the antenna may be a shielded loop antenna having multiple shielded feed lines. A kit including one or more components of such a shielded loop antenna may include a conductive structure in the form of a loop having multiple radial arms. In an embodiment of a method for forming an antenna, multiple feed points may be spaced apart around a conductive loop, and a respective feed line coupled to each of the feed points. In an embodiment, the feed lines may be shielded lines connected together at a shunt connection. The antenna may produce an isotropic radiation pattern similar to that of an electrically small antenna, but from an antenna of moderate electrical size.

Abstract: A transformer for connection between a generator and a load may be formed by connecting n transmission lines together, in series at one end and in parallel at the other end. The transmission lines are configured to each have a characteristic impedance of {square root over (RG+L |ZL+L (f0+L |)}, where f0 is the frequency at which each transmission line is one quarter of a wavelength long (quarter-wavelength frequency), |ZL(f0)| is the magnitude of the load impedance at the quarter-wavelength frequency, and RG is the generator resistance. The transformer exhibits a frequency-dependent impedance transformation ratio, allowing a more efficient impedance match of a generator to a load having a frequency-dependent impedance, such as an antenna.

Abstract: An antenna structure may be formed by arranging a current-restricting structure upon a conductive surface. The current-restricting structure may be formed from a ferrite material, and may be in forms including a belt, tiles, or a patterned deposited layer. The conductive surface may be associated with a vehicle or structure. The current-restricting structure alters the paths taken by current on or beneath the conductive surface when a voltage is applied between portions of the surface.

Abstract: A broadband antenna incorporating both electric and magnetic dipole radiators includes a tapered feed, such as a bow-tie feed, having a central feedpoint and first and second outer regions displaced from the central feedpoint. One or more conducting loop elements are connected between the outer regions of the tapered feed. Top loading capacitive elements extending from each of the outer regions may also be provided.

Abstract: A tapered, inverted-L bow-tie antenna is disclosed which includes a bow-tie antenna component connected to a central feed and having top-loading elements connected to each bow-tie half opposite the central feed. According to the invention, a series inductance is introduced between the feed and the antenna tips, and preferably at the transition between the bow-tie halves and the top-loading elements. In a preferred embodiment, the inductive loading is introduced by a buttonhook or hairpin curve in the antenna region between the bow-tie portion and the tapered portion. The added inductance reduces the capacitive reactance. The low impedance partway on stem also increases current flow, and thus the antenna's performance. The input impedance is also increased, making it easier to match the antenna to a driving hardware. The antenna can be used by itself or in combination with a log periodic dipole array.