Patent ID: 7006804
Filing Date: 2006-02-28
Classification: H04B,H04W

Abstract:
1. Apparatus comprising a first antenna system comprising at least first and second antennas installed at respective fixed locations, said first and second antennas each being aimed toward a second antenna system, and transmitter means for applying to said first antenna a first radio-frequency signal having energy in a particular frequency band and representing a first data stream, and for applying to said second antenna a second radio-frequency signal having energy in said particular frequency band and representing a second data stream, said first and second antennas being located with respect to each other and with respect to said second antenna system in such a way that at least two versions of said first radio-frequency signal, having substantially different phases, arrive at said second antenna system and in such a way that at least two versions of said second radio-frequency signal, having substantially different phases, arrive at said second antenna system, wherein said at least two versions of said first radio-frequency signal traverse paths differing in length by d