Patent ID: 6549760
Filing Date: 2003-04-15
Classification: H04B

Abstract:
A radio communication device for communicating by selecting a predetermined antenna from a plurality of antennae, the communication device comprising:a transmission circuit (5) providing communications signals to be transmitted; a first antenna (2) of the plurality of antennae; a first switch (111) having a first signal switching path (t21-t22) and a second signal switching path (t21-t23), said first switch being selectively switchable between said first signal switching path and said second signal switching path, said first signal switching path connecting said transmission circuit to said first antenna so by a connection using only a single signal switching path, thereby to limit attenuation of the transmitted communications signals; a receiving circuit (6) for receiving communications signals; a second antenna of the plurality of antennae (3); a second switch (112) having a first signal switching path (t31-t33) and a second signal switching path (t31-t32), said second switch being selectively switchable between said first signal switching path and said second signal switching path, said first signal switching path connecting said receiving circuit to said second antenna for allowing said receiving circuit to receive communication signals by a connection using only a single signal switching path, thereby to limit attenuation of the received communications signals; and means for connecting the second signal switching path of said first switch and said second signal switching path of said second switch together to allow said receiving circuit to be connected to said first antenna to receive communications signals, whereby communication signals received by said receiving circuit pass along two signal switching paths only when said receiving circuit is connected to said first antenna.