Patent ID: 6771931
Filing Date: 2004-08-03
Classification: H04B

Abstract:
A system comprising:a first radio having a first radio transceiver and a first radio antennae; a second radio having a second radio transceiver and a second radio antennae, the first and second radios operating on a same frequency band, the first radio antennae located a predetermined distance from the second radio antennae, the first and second radio antennas having a coupling loss; a first coupler and a second coupler adjusted according to the coupling loss; a first phase shifter coupled between the first coupler and second coupler; and wherein the first radio transceiver transmits a first signal, the first signal divided by the first coupler to a first portion and a second portion of the first signal, the first portion moving through the first radio antennae and received by the second radio antennae, the second portion moving through the first phase shifter, both portions meeting and canceling to achieve a specified isolation between the first and second radios.