System and method for TDD/TMA with hybrid bypass switch of receiving amplifier
View Patent ↗Various embodiments disclosed herein relate to a circuit for connecting a transceiver input/output to an antenna, the circuit including one or more of the following: a transceiver port; an antenna port; a reception path disposed between the transceiver port and the antenna port; a first amplifier configured to amplify a signal on the reception path when the circuit is configured according to a normal operation mode; and a first hybrid coupler configured to establish a bypass path around the first amplifier when the circuit is configured according to a bypass operation mode.
1. A circuit for connecting a transceiver input/output to an antenna, the circuit comprising:
a transceiver port;
an antenna port;
a reception path disposed between the transceiver port and the antenna port;
a first amplifier configured to amplify a signal on the reception path when the circuit is configured according to a normal operation mode;
a first hybrid coupler configured to establish a bypass path around the first amplifier, wherein the first hybrid coupler is part of the bypass path, when the circuit is configured according to a bypass operation mode;
a second hybrid coupler configured to establish the bypass path around the first amplifier when the circuit is configured according to the bypass operation mode, wherein the first hybrid coupler is disposed between the first amplifier and the transceiver port, and the second hybrid coupler is disposed between the first amplifier and the antenna port; and
a third hybrid coupler configured to establish the bypass path around the first amplifier when the circuit is configured according to the bypass operation mode, wherein the third hybrid coupler is disposed between a port of the first hybrid coupler and a port of the second hybrid coupler.
2. The circuit of claim 1 , further comprising:
a transmission path disposed between the transceiver port and the antenna port.
3. The circuit of claim 2 , further comprising:
a power detector configured to detect transmitter power on the transmission path and configure the circuit according to the bypass operation mode when the power detector detects transmitter power on the transmission path.
4. The circuit of claim 1 , further comprising:
a second amplifier configured to amplify the signal on the reception path;
a first switchable impedance disposed between a first port of the first hybrid coupler and the first amplifier; and
a second switchable impedance disposed between a second port of the first hybrid coupler and the second amplifier, wherein, the circuit being configured according to the bypass operation mode comprises the first switchable impedance and the second switchable impedance being configured in a mismatched state, whereby a third port of the first hybrid coupler is directly connected to a fourth port of the first hybrid coupler.
5. The circuit of claim 1 , further comprising:
a first switchable impedance connected to a first port of the first hybrid coupler; and
a second switchable impedance disposed connected to a second port of the first hybrid coupler, wherein, the circuit being configured according to the bypass operation mode comprises the first switchable impedance and the second switchable impedance being configured in a mismatched state, whereby a third port of the first hybrid coupler is directly connected to a fourth port of the first hybrid coupler.
6. The circuit of claim 5 , wherein the circuit being configured according to the normal operation mode comprises the first switchable impedance and the second switchable impedance being configured in a matching state, whereby the third port of the first hybrid coupler splits an input signal between the first port and the second port.
7. The circuit of claim 1 , further comprising:
a pair of switchable grounding impedances disposed between the third hybrid coupler and a ground.
8. The circuit of claim 1 , further comprising:
a first switchable impedance disposed between the first amplifier and the transceiver port;
a second switchable impedance disposed between the first amplifier and the antenna port; and
an attenuator disposed between the first switchable impedance and the second switchable impedance, wherein the first switchable impedance and the second switchable impedance are configured to selectively direct the signal through either the amplifier or the attenuator.
9. A circuit for connecting a transceiver input/output to an antenna, the circuit comprising:
a transceiver port;
an antenna port;
a transmission path disposed between the transceiver port and the antenna port;
a reception path disposed between the transceiver port and the antenna port;
a power detector configured to detect transmitter power on the transmission path;
a first attenuator configured to attenuate a signal on the reception path based on the power detector detecting the transmitter power on the transmission path;
a first amplifier configured to amplify the signal on the reception path based on the power detector not detecting the transmitter power on the transmission path; and
a first hybrid coupler configured to establish a bypass path around the first amplifier and the first attenuator, wherein the first hybrid coupler is part of the bypass path;
a second hybrid coupler configured to establish the bypass path around the first amplifier when the circuit is configured according to a bypass operation mode, wherein the first hybrid coupler is disposed between the first amplifier and the transceiver port, and the second hybrid coupler is disposed between the first amplifier and the antenna port; and
a third hybrid coupler configured to establish the bypass path around the first amplifier when the circuit is configured according to the bypass operation mode, wherein the third hybrid coupler is disposed between a port of the first hybrid coupler and a port of the second hybrid coupler.
10. The circuit of claim 9 , further comprising:
a first switchable impedance disposed between a first port of the hybrid coupler, the first amplifier, and the first attenuator, wherein the first switchable impedance is controllable by the power detector to determine whether the first attenuator attenuates the signal or the first amplifier amplifies the signal.
11. The circuit of claim 10 , further comprising:
a second amplifier;
a second attenuator; and
a second switchable impedance disposed between a second port of the hybrid coupler, the second amplifier, and the second attenuator, wherein the hybrid coupler being configured to establish the bypass path comprises the first switchable impedance and the second switchable impedance occupying a mismatched state, whereby a third port of the hybrid coupler and a fourth port of the hybrid coupler are directly connected to one another.
12. The circuit of claim 9 , further comprising:
a bandpass filter disposed between the antenna port and the first amplifier.
13. The circuit of claim 9 , further comprising:
a circulator disposed between the transmission path, the reception path, and at least one of: the transceiver port and the antenna port.
14. The circuit of claim 9 , wherein the hybrid coupler is configured to direct the signal over the bypass path in response to a power supply failure.
15. A circuit for connecting a transceiver input/output to an antenna, the circuit comprising:
a transceiver port;
an antenna port;
a transmission path disposed between the transceiver port and the antenna port;
a reception path disposed between the transceiver port and the antenna port;
a power detector configured to detect transmitter power on the transmission path;
a first attenuator configured to attenuate a signal on the reception path based on the power detector detecting the transmitter power on the transmission path;
a first amplifier configured to amplify the signal on the reception path based on the power detector not detecting the transmitter power on the transmission path; and
a first switchable impedance connected to the first amplifier and the first attenuator, wherein the first switchable impedance is controllable to direct the signal on the reception path to either the first amplifier or the first attenuator.
16. The circuit of claim 15 , wherein the power detector is configured to output a transmit/receive signal that controls the first switchable impedance.
17. The circuit of claim 15 , further comprising:
a second amplifier;
a second attenuator; and
a second switchable impedance connected to the second amplifier and the second attenuator, wherein the second switchable impedance is controllable to direct the signal on the reception path to either the first amplifier or the first attenuator.
18. The circuit of claim 17 , further comprising:
a third switchable impedance connected to the first amplifier and the first attenuator; and
a fourth switchable impedance connected to the second amplifier and the second attenuator.
19. A circuit for connecting a transceiver input/output to an antenna, the circuit comprising:
a transceiver port;
an antenna port;
a reception path disposed between the transceiver port and the antenna port;
a first amplifier configured to amplify a signal on the reception path when the circuit is configured according to a normal operation mode;
a first hybrid coupler configured to establish a bypass path around the first amplifier, wherein the first hybrid coupler is part of the bypass path, when the circuit is configured according to a bypass operation mode;
a first switchable impedance connected to a first port of the first hybrid coupler; and
a second switchable impedance disposed connected to a second port of the first hybrid coupler, wherein the circuit being configured according to the bypass operation mode comprises the first switchable impedance and the second switchable impedance being configured in a mismatched state, whereby a third port of the first hybrid coupler is directly connected to a fourth port of the first hybrid coupler.
20. The circuit of claim 19 , further comprising:
a second amplifier configured to amplify the signal on the reception path, wherein the first switchable impedance is disposed between a first port of the first hybrid coupler and the first amplifier, the second switchable impedance is disposed between a second port of the first hybrid coupler and the second amplifier, and the circuit being configured according to the bypass operation mode comprises the first switchable impedance and the second switchable impedance being configured in a mismatched state, whereby a third port of the first hybrid coupler is directly connected to a fourth port of the first hybrid coupler.
21. The circuit of claim 19 , wherein the circuit being configured according to the normal operation mode comprises the first switchable impedance and the second switchable impedance being configured in a matching state, whereby the third port of the first hybrid coupler splits an input signal between the first port and the second port.
22. The circuit of claim 19 , further comprising:
an attenuator disposed between the first switchable impedance and the second switchable impedance, wherein the first switchable impedance and the second switchable impedance are configured to selectively direct the signal through either the amplifier or the attenuator.
23. A circuit for connecting a transceiver input/output to an antenna, the circuit comprising:
a transceiver port;
an antenna port;
a transmission path disposed between the transceiver port and the antenna port;
a reception path disposed between the transceiver port and the antenna port;
a power detector configured to detect transmitter power on the transmission path;
a first attenuator configured to attenuate a signal on the reception path based on the power detector detecting the transmitter power on the transmission path;
a first amplifier configured to amplify the signal on the reception path based on the power detector not detecting the transmitter power on the transmission path;
a hybrid coupler configured to establish a bypass path around the first amplifier and the first attenuator, wherein the hybrid coupler is part of the bypass path; and
a first switchable impedance disposed between a first port of the hybrid coupler, the first amplifier, and the first attenuator, wherein the first switchable impedance is controllable by the power detector to determine whether the first attenuator attenuates the signal or the first amplifier amplifies the signal.