Abstract: An antenna system for creating mutual radiation isolation between planar antenna elements over a narrow band uses field cancellation. Adjacent planar antenna elements are positioned in a common ground plane within a mobile phone repeater station, A tuned slot element is positioned between the antenna elements and coupled to share ground plane current in order to maximize cancellation and minimize degradation of the radiation of the antenna elements. The dimensions of the toned slot element are adjusted to obtain lambda/2 resonance, whereby, isolation of more than 10 dB is attained between the antenna elements.

Abstract: A hand-held apparatus has a Doppler radar secured within one wall of a phone sleeve. A phone may be placed within the sleeve and in signal communication with the radar via a connector molded in the sleeve. In operation, an RF signal may be directed toward a distant moving target and a bounce signal received. The speed of the target is calculated from the Doppler frequency shift and displayed by the phone to the user.

Abstract: An antenna system for creating mutual radiation isolation between planar antenna elements over a narrow band uses field cancellation. Adjacent planar antenna elements are positioned in a common ground plane within a mobile phone repeater station, A tuned slot element is positioned between the antenna elements and coupled to share ground plane current in. order to maximize cancellation and minimize degradation of the radiation of the antenna elements. The dimensions of the toned slot element are adjusted to obtain lambda/2 resonance, whereby, isolation of more than 10 dB is attained between the antenna elements.

Abstract: A system and method for processing signals in a selected channel through a repeater wherein the repeater is dynamically adapted to the channel by receiving channel information from a local cell phone, such information including modulation and channel designation.