The present invention discloses an antenna diversity switch, used for
receiving and transmitting RF signals for dual-mode co-existence wireless
communication system. The antenna diversity switch comprises a first
transmitting port; a second transmitting port; a receiving port; a first
control unit, electrically connected between the first transmitting port
and a first antenna; a second control unit, electrically connected
between the first transmitting port and a second antenna; a third control
unit, electrically connected between the second transmitting port and the
first antenna; a forth control unit, electrically connected between the
second transmitting port and the second antenna; a fifth control unit,
electrically connected between the receiving port and the first antenna;
a sixth control unit, electrically connected between the receiving port
and the second antenna. The antenna diversity switch according to the
present invention meets the requirement of IEEE 802.11b/g WLAN and
Bluetooth co-existence operation with reduction of three or four antennas
in the prior art to two antennas. Moreover, it provides antenna diversity
for both WLAN and Bluetooth systems, where in the prior-art WLAN and
Bluetooth co-existence system only WLAN system has the antenna diversity.