Abstract: In accordance with the present invention, there is provided a patch antenna assembly having a generally planar patch antenna, defined by a first peripheral boundary, and a generally planar parasitic ground plate, disposed to spaced parallel relation to the patch antenna. The assembly further includes at least one conductive parasitic shielding element for segregating electromagnetic fields between the patch antenna and the ground plate. The shielding element is disposed in electrical communication with the ground plate and extends from the ground plate and substantially about the first peripheral boundary of the patch antenna.

Abstract: A patch antenna having enhanced frequency response has a generally planar element formed of a substantially conductive material, and antenna feed conductor electrically connected to the antenna element, and a generally planar parasitic element formed of a substantially conductive material positioned substantially coaxially with respect to the antenna element and spaced apart therefrom. The distance by which the parasitic element is spaced apart from the antenna element in order to provide such enhanced frequency response of the patch antenna is determined empirically. An optimally configured array of such patch antennas is also disclosed.

Abstract: A compact broadband log-periodic antenna for transmitting and receiving frequencies between 0.5 to 18 GHZ. The antenna comprises two dielectric substrates bonded together, both substrates comprise a first group of dipole elements configured in a log-periodic sequence and a second group of serpentine configured dipole elements fabricated on the same substrate and in electrical communication with the first group of elements. The serpentine dipole elements are configured in a specific pattern such that the size of the antenna is reduced, yet still maintains log-periodic characteristics. Disposed between the two substrates is a feed system in electrical communication with both groups of elements such that a connector from a transmitter or receiver can be in communication with the antenna.

Abstract: A bidirectional broadband log-periodic antenna assembly has a printed wiring board having a plurality of log-periodic antennas etched upon at least one side thereof. Each log-periodic antenna comprises a plurality of antenna elements extending from a common trunk. A resistive film is formed upon a distal end of a longest antenna element extending from at least one trunk. The resistive film enhances a low frequency response of the antenna.