Radio frequency front-end frequency division duplex architecture

1 . A radio frequency front end system comprising a radio frequency module, the radio frequency module including:

a first transmit path including a first transmit filter and configured to transmit a transmit signal in a first band group to a first antenna;

a first receive path including a first receive filter and configured to receive a receive signal in the first band group from a second antenna, the first transmit filter and the first receive filter being different filters;

a second receive path including a second receive filter and configured to receive a receive signal in a second band group from the first antenna;

a second transmit path including a second transmit filter and configured to transmit a transmit signal in the second band group to the second antenna, the second transmit filter and the second receive filter being different filters; and

a first antenna switch module configured to concurrently couple the first transmit filter to the first antenna, and the second antenna to the first receive filter.

2 . The radio frequency front end system of claim 1 comprising a second antenna switch module configured to couple the first antenna to the second receive filter and to couple the second transmit filter to the second antenna.

3 . The radio frequency front end system of claim 2 wherein the second antenna switch module is configured to concurrently couple the second transmit filter to the second antenna, and the first antenna to the second receive filter.

4 . The radio frequency front end system of claim 1 wherein the first transmit filter is a mid-high band filter and the first receive filter is a low band filter.

5 . The radio frequency front end system of claim 4 wherein the second transmit filter is a low band filter, and the second receive filter is a mid-high band filter.

6 . A device comprising:

a transceiver; and

a radio frequency front end system coupled to the transceiver, the radio frequency front end system including a RF module including a first transmit path including a first transmit filter and configured to transmit a transmit signal in a first band group to a first antenna, a first receive path including a first receive filter and configured to receive a receive signal in the first band group from a second antenna, a second receive path including a second receive filter and configured to receive a receive signal in a second band group from the first antenna, and a second transmit path including a second transmit filter and configured to transmit a transmit signal in the second band group to the second antenna, the first transmit filter and the first receive filter being different filters, the second transmit filter and the second receive filter being different filters; and

a first antenna switch module configured to concurrently couple the first transmit filter to the first antenna, and the second antenna to the first receive filter.

7 . The device of claim 6 including a second antenna switch module configured to couple the first antenna to the second receive filter and to couple the second transmit filter to the second antenna.

8 . The device of claim 7 wherein the second antenna switch module is configured to con currently couple the second transmit filter to the second antenna, and the first antenna to the second receive filter.

9 . The device of claim 6 wherein the first transmit filter is a mid-high band filter and the first receive filter is a low band filter.

10 . The device of claim 9 wherein the second transmit filter is a low band filter, and the second receive filter is a mid-high band filter.

11 . A method of performing wireless communication using a radio frequency module of a radio frequency front end system, the method comprising:

transmitting, via a first transmit path including a first transmit filter, a transmit signal in a first band group to a first antenna;

receiving, via a first receive path including a first receive filter, a receive signal in the first band group from a second antenna, the first transmit filter and the first receive filter being different filters;

receiving, via a second receive path including a second receive filter, a receive signal in a second band group from the first antenna;

transmitting, via a second transmit path including a second transmit filter, a transmit signal in the second band group to the second antenna, the second transmit filter and the second receive filter being different filters; and

by a first antenna switch module, concurrently coupling the first transmit filter to the first antenna, and the second antenna to the first receive filter.

12 . The method of claim 11 comprising receiving, via a second receive path including a second receive filter, a receive signal in a second band group from the first antenna.

13 . The method of claim 12 comprising transmitting, via a second transmit path including a second transmit filter, a transmit signal in the second band group to the second antenna.

14 . The method of claim 13 wherein the second transmit filter and the second receive filter are different filters.

15 . The method of claim 14 comprising, by a second antenna switch module, coupling the first antenna to the second receive filter.

16 . The method of claim 15 comprising, by the second antenna switch module, coupling the second transmit filter to the second antenna.

17 . The method of claim 16 comprising, by the second antenna switch module, concurrently coupling the second transmit filter to the second antenna, and the first antenna to the second receive filter.

18 . The method of claim 11 wherein the first transmit filter is a mid-high band filter and the first receive filter is a low band filter.

19 . The method of claim 18 wherein the second transmit filter is a low band filter, and the second receive filter is a mid-high band filter.