Semiconductor device and fabrication method
View Patent ↗The present disclosure relates to impedance tuning of transmitting and receiving antennas.
1. An apparatus comprising:
a transceiver;
a receive antenna;
a transmit antenna;
a receive path coupled between the transceiver and the receive antenna, the receive path comprising a receive amplifier and a first filter;
at least one receive tuning element configured to match an impedance of the receive antenna and an impedance of the receive path;
a transmit path coupled between the transceiver and the transmit antenna, the transmit path comprising a transmit amplifier;
at least one transmit tuning element configured to match an impedance of the transmit antenna and an impedance of the transmit path;
a control circuitry configured to determine the impedance of the receive path and the impedance of the transmit path.
2. The apparatus of claim 1 , wherein the impedance of the receive path depends on an impedance of the receive amplifier and an influence by the first filter.
3. The apparatus of claim 1 , wherein the impedance of the transmit path depends on an impedance of the transmit amplifier.
4. The apparatus of claim 1 , wherein the transmit path further comprises a second filter.
5. The apparatus of claim 4 , wherein the impedance of the transmit path depends on an impedance of the transmit amplifier and an influence by the second filter.
6. The apparatus of claim 1 , wherein the control circuitry is further configured to provide control signals to the at least one receive tuning element and the at least one transmit tuning element.
7. The apparatus of claim 6 , wherein the control circuitry is further configured to control the at least one receive tuning element and the at least one transmit tuning element independently.
8. The apparatus of claim 1 , wherein the at least one receive tuning element and/or the at least one transmit tuning element comprises a capacitor and/or a microelectromechanical system (MEMS) capacitor.
9. The apparatus of claim 1 , wherein the at least one receive tuning element comprises a tuning circuit of the receive path.
10. The apparatus of claim 1 , wherein the at least one transmit tuning element comprises a tuning circuit of the transmit path.
11. The apparatus of claim 1 , wherein the receive antenna and the transmit antenna are separate antennas.
12. The apparatus of claim 1 , wherein the receive antenna and the transmit antenna comprise a common feed.
13. The apparatus of claim 1 , wherein the receive antenna and/or the transmit antenna is a narrowband antenna.
14. A communication device comprising the apparatus of claim 1 .
15. A mobile phone comprising the apparatus of claim 1 .