Abstract: Typical consumer-grade terrestrial television antennas use simple flat plates in a dipole configuration. Reception is enhanced by elevating the antenna for better line of sight to the broadcast antenna, which often necessitates locating the antenna in the attic of a building or on the roof in the where it is exposed to the weather. The antenna disclosed is uses antenna elements that are substantially planar, have a unique shape that improves reception, and allows for compact packaging in a weatherproof case.

Abstract: Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is transmitted into a target area, and nonlinear reflection signals received from the target area are processed to obtain a response measurement. The response measurement is compared to a pre-determined filter response profile to detect the presence of a radio device having a corresponding filter response characteristic. In some embodiments, the pre-determined filter response profile comprises a pre-determined band-edge profile, so that comparing the response measurement to a pre-determined filter response profile comprises comparing the response measurement to the pre-determined band-edge profile to detect the presence of a radio device having a corresponding band-edge characteristic.

Abstract: Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is transmitted into a target area, and nonlinear reflection signals received from the target area are processed to obtain a response measurement. The response measurement is compared to a pre-determined filter response profile to detect the presence of a radio device having a corresponding filter response characteristic. In some embodiments, the pre-determined filter response profile comprises a pre-determined band-edge profile, so that comparing the response measurement to a pre-determined filter response profile comprises comparing the response measurement to the pre-determined band-edge profile to detect the presence of a radio device having a corresponding band-edge characteristic.

Abstract: A covert antenna or radio frequency probe assembly for a motor vehicle includes a substantially planar antenna or probe element including a sheet of electrically conductive material, a first dielectric substrate, and a second dielectric substrate. A connector is coupled to the antenna element and is adapted to supply electrical energy to the antenna or probe element from an electrical power source. The antenna or probe element is disposed between the first substrate and the second substrate, and the first substrate is bonded to the second substrate to form a substantially planar antenna or probe assembly. The antenna or probe assembly has the form of a motor vehicle mud guard or another substantially planar motor vehicle component.