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US 11,271,541 B2Granted
Microwave duplexer using coupled inductors to improve isolation
AssigneeResonant Inc.
InventorAndrew Guyette
Life of this patent
Estimating the term…
Abstract
A duplexer includes a duplexer package having a transmit terminal, an antenna terminal, a receive terminal and at least one package ground terminal, a transmit filter disposed within the duplexer package, and a receive filter disposed within the duplexer package. Coupled first and second inductors, the first inductor connected to the transmit filter and the second inductor connected to the receive filter, are configured to cancel, at least in part, RF signal leakage between the transmit filter and the receive filter.
Claims14
A duplexer, comprising:
- a duplexer package having a transmit port, an antenna port, a receive port and at least one package ground terminal;
- a transmit filter disposed within the duplexer package;
- a receive filter disposed within the duplexer package;
- and
- coupled first and second inductors, the first inductor connected to the transmit filter and the second inductor connected to the receive filter, wherein
- the first inductor is connected between the transmit port and the input of the transmit filter,
- the second inductor is connected between the at least one package ground terminal and a first end of a capacitor, a second end of the capacitor connected to the output of the receive filter, and
- the coupled first and second inductors are configured to cancel, at least in part, RF signal leakage between the transmit filter and the receive filter.
5 more elements
A duplexer, comprising:
- a duplexer package having a transmit port, an antenna port, a receive port and at least one package ground terminal;
- a transmit filter disposed within the duplexer package, the transmit filter comprising:
- a transmit filter input, a transmit filter output, and one or more transmit ground terminals,
- one or more series resonators, and
- one or more shunt resonators, each of the one or more shunt resonators connected to one of the one or more transmit ground terminals;
- a receive filter disposed within the duplexer package, the receive filter comprising:
- a receive filter input, a receive filter output, and one or more receive ground terminals,
- one or more series resonators, and
- one or more shunt resonators, each of the one or more shunt resonators connected to one of the one or more receive ground terminals;
- and
- coupled first and second inductors, the first inductor connected to the transmit filter and the second inductor connected to the receive filter, wherein
- the first inductor is connected between the transmit port and the input of the transmit filter,
- the second inductor is connected between the at least one package ground terminal and a first end of a capacitor, a second end of the capacitor connected to the output of the receive filter, and
- the coupled first and second inductors are configured to cancel, at least in part, RF signal leakage between the transmit filter and the receive filter.
11 more elements
Dependencies are inferred from the claim text.