Switchable RF transmit/receive multiplexer
A switchable RF transmit/receive (TX/RX) multiplexer, which includes a group of RF TX bandpass filters, a group of RF TX switching elements, and a group of RF RX bandpass filters; is disclosed. The group of RF TX bandpass filters includes a first RF TX bandpass filter and a second RF TX bandpass filter, such that each of the first RF TX bandpass filter and the second RF TX bandpass filter is coupled to a first filter connection node. The group of RF TX switching elements includes a first RF TX switching element coupled between the first filter connection node and a first common connection node, which is coupled to a first RF antenna. Each of the group of RF RX bandpass filters is coupled to the first common connection node.
1. A switchable radio frequency (RF) transmit/receive (TX/RX) multiplexer comprising:
a first common connection node coupled directly to a first RF antenna;
a second common connection node coupled directly to a second RF antenna;
a plurality of RF TX bandpass filters;
a plurality of first RF TX switching elements each coupled between the first common connection node and a respective one of the plurality of RF TX bandpass filters;
a plurality of second RF TX switching elements each coupled between the second common connection node and a respective one of the plurality of RF TX bandpass filters;
a plurality of first RF RX bandpass filters each coupled to the first common connection node without any intervening switching element; and
a plurality of second RF RX bandpass filters each coupled to the second common connection node without any intervening switching element.
2. The switchable RF TX/RX multiplexer of claim 1 , further comprising a plurality of first RF phase-shifting circuits each coupled between a respective one of the plurality of first RF TX switching elements and a respective one of the plurality of RE TX bandpass filters.
3. The switchable RF TX/RX multiplexer of claim 2 , wherein each of the plurality of first RF phase-shifting circuits is configured to cause the plurality of RF TX bandpass filters and the plurality of first RF RX bandpass filters to operate in full-duplex operation without interfering with one another.
4. The switchable RF TX/RX multiplexer of claim 1 , further comprising a plurality of second RF phase-shifting circuits each coupled between a respective one of the plurality of second RF TX switching elements and a respective one of the plurality of RF TX bandpass filters.
5. The switchable RF TX/RX multiplexer of claim 1 , further comprising:
a plurality of first RF phase-shifting circuits each coupled between a respective one of the plurality of first RF TX switching elements and a respective one of the plurality of RE TX bandpass filters; and
a plurality of second RF phase-shifting circuits each coupled between a respective one of the plurality of second RF TX switching elements and a respective one of the plurality of RF TX bandpass filters.
6. Radio frequency (RE) communication circuitry comprising:
a switchable RF transmit/receive (TX/RX) multiplexer comprising:
a first common connection node coupled directly to a first RF antenna;
a second common connection node coupled directly to a second RF antenna;
a plurality of RF TX bandpass filters;
a plurality of first RF TX switching elements each coupled between the first common connection node and a respective one of the plurality of RE TX bandpass filters;
a plurality of second RF TX switching elements each coupled between the second common connection node and a respective one of the plurality of RF TX bandpass filters;
a plurality of first RF RX bandpass filters each coupled to the first common connection node without any intervening switching element; and
a plurality of second RF RX bandpass filters each coupled to the second common connection node without any intervening switching element;
RF front-end circuitry comprising:
RF transmit circuitry coupled to the plurality of RF TX bandpass filters; and
RF receive circuitry coupled to the plurality of first RF RX bandpass filters and the plurality of second RF RX bandpass filters; and
RF system control circuitry coupled to the RF transmit circuitry and the RF receive circuitry.
7. The RF communication circuitry of claim 6 , wherein the switchable RF TX/RX multiplexer further comprises a plurality of first RF phase-shifting circuits each coupled between a respective one of the plurality of first RF TX switching elements and a respective one of the plurality of RF TX bandpass filters.
8. The RF communication circuitry of claim 7 , wherein each of the plurality of first RF phase-shifting circuits is configured to cause the plurality of RF TX bandpass filters and the plurality of first RF RX bandpass filters to operate in full-duplex operation without interfering with one another.
9. The RF communication circuitry of claim 6 , wherein the switchable RF TX/RX multiplexer further comprises a plurality of second RF phase-shifting circuits each coupled between a respective one of the plurality of second RF TX switching elements and a respective one of the plurality of RF TX bandpass filters.
10. The RF communication circuitry of claim 6 , wherein the switchable RF TX/RX multiplexer further comprises:
a plurality of first RF phase-shifting circuits each coupled between a respective one of the plurality of first RF TX switching elements and a respective one of the plurality of RF TX bandpass filters; and
a plurality of second RF phase-shifting circuits each coupled between a respective one of the plurality of second RF TX switching elements and a respective one of the plurality of RF TX bandpass filters.
11. The RF communication circuitry of claim 6 , wherein the RF system control circuitry is configured to configure the switchable RF TX/RX multiplexer based on a function configuration signal.
12. The RF communication circuitry of claim 6 , wherein:
the RF system control circuitry is configured to provide a plurality of upstream RF transmit signals to the RF transmit circuitry; and
the RF transmit circuitry is configured to:
process each of the plurality of upstream RF transmit signals to generate a respective one of a plurality of downstream RF transmit signals; and
provide the plurality of downstream RF transmit signals to the plurality of RF TX bandpass filters.
13. The RF communication circuitry of claim 12 , wherein the RF system control circuitry is further configured to:
select one of the plurality of downstream RF transmit signals; and
cause the switchable RF TX/RX multiplexer to forward the selected one of the plurality of downstream RF transmit signals to the first common connection node.
14. The RF communication circuitry of claim 6 , wherein:
each of the plurality of first RF RX bandpass filters is configured to:
receive a respective one of a plurality of first RF receive signals via the first common connection node;
generate a respective one of a plurality of first upstream RF receive signals based on the respective one of the plurality of first RF receive signals; and
provide the respective one of the plurality of first upstream RF receive signals to the RF receive circuitry; and
each of the plurality of second RF RX bandpass filters is configured to:
receive a respective one of a plurality of second RF receive signals via the second common connection node;
generate a respective one of a plurality of second upstream RF receive signals based on the respective one of the plurality of second RF receive signals; and
provide the respective one of the plurality of second upstream RF receive signals to the RF receive circuitry.
15. The RF communication circuitry of claim 14 , wherein the RF receive circuitry is configured to;
receive the plurality of first upstream RF receive signals and the plurality of second upstream RF receive signals;
generate a respective one of a plurality of first downstream RF receive signals from each of the plurality of first upstream RF receive signals;
generate a respective one of a plurality of second downstream RF receive signals from each of the plurality of second upstream RF receive signals; and
provide the plurality of first downstream RF receive signals and the plurality of second downstream RF receive signals to the RF system control circuitry.