An antenna module on a vehicle having an antenna for receiving satellite radio signals and an antenna for receiving GPS signals. The two antennas may or may not be on a common ceramic substrate. Either of the two antennas may be a ceramic patch antenna or a helical antenna. The respective signals from each of the antenna as is amplified by a low noise amplifier, filtered, and then combined onto a single conductor and amplified prior to being provided on a single conductor routed through the vehicle to a remotely-located pair of receivers.

 
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> Space-time-frequency sensing of RF spectrum in cognitive radios

> Multi-path generating apparatus, a multi-path fading simulator, and a multi-path generating method

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