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AssigneeApple Inc.
InventorsChristof Pfannenmüller, Joonhoi Hur, Dominic Koehler, Harald Pretl, Rastislav Vazny
Estimating the term…
A differential double balanced duplexer (dDBD) includes a transmitter and a first balun coupled to a first impedance tuner that produces a first impedance that blocks received signals at a first frequency range from travelling across the first balun and into the transmitter, and a second impedance that passes transmitted signals at a second frequency range to travel across the first balun to the antenna. The dDBD also includes a receiver and a second balun coupled to a second impedance tuner that produces a first impedance that allows the received signals at the first frequency range to travel across the second balun and into the receiver, and a second impedance that blocks the transmitted signals at the second frequency range from travelling across the second balun and into the receiver. As such, the dDBD allows for increased isolation and decreased insertion loss.
Isolation circuitry comprising:
A communication device comprising:
A radio frequency transceiver comprising:
Dependencies are inferred from the claim text.