RF duplexing device
First Claim
1. A radio frequency (RF) duplexing device comprising:
- a transmission port;
a receive port;
a first duplexer coupled to the transmission port and the receive port, and configured to provide a first phase shift from the transmission port to the receive port, wherein the first duplexer includes a non-inverting transformer coupled to the receive port; and
a second duplexer coupled to the transmission port and the receive port, and configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port, wherein the second duplexer includes an inverting transformer coupled to the receive port wherein the inverting transformer is configured to provide a polarity inversion such that the second phase shift is differential to the first phase shift.
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Accused Products
Abstract
Radio frequency (RF) duplexing devices and methods of operating the same are disclosed. In one embodiment, an RF duplexing device includes a transmission port, a receive port, a first duplexer, and a second duplexer. The first duplexer is coupled to the transmission port and the receive port, and is configured to provide a first phase shift from the transmission port to the receive port. The second duplexer is also coupled to the transmission port and the receive port. However, the second duplexer is configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port. By providing the second phase shift so that the second phase shift is differential to the first phase shift, the RF duplexing device can provide isolation through cancellation without needing to introduce significant insertion losses.
37 Citations
20 Claims
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1. A radio frequency (RF) duplexing device comprising:
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a transmission port; a receive port; a first duplexer coupled to the transmission port and the receive port, and configured to provide a first phase shift from the transmission port to the receive port, wherein the first duplexer includes a non-inverting transformer coupled to the receive port; and a second duplexer coupled to the transmission port and the receive port, and configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port, wherein the second duplexer includes an inverting transformer coupled to the receive port wherein the inverting transformer is configured to provide a polarity inversion such that the second phase shift is differential to the first phase shift. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of duplexing a radio frequency (RF) transmission signal and an RF receive signal comprising:
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inputting the RF transmission signal at a transmission port, wherein the transmission port is coupled to a first duplexer and a second duplexer; outputting the RF receive signal from a receive port, wherein the receive port is coupled to the first duplexer and the second duplexer, wherein the first duplexer includes a non-inverting transformer coupled to the receive port and the second duplexer includes and the second duplexer includes an inverting transformer coupled to the receive port; providing a first phase shift with the non-inverting transformer from the transmission port to the receive port through the first duplexer while the RF transmission signal is being input at the transmission port and while the RF receive signal is being output from the receive port; and providing a second phase shift with the inverting transformer from the transmission port to the receive port through the second duplexer while the RF transmission signal is being input at the transmission port and while the RF receive signal is being output from the receive port, wherein the inverting transformer provides a polarity inventions such that the second phase shift is differential to the first phase shift from the transmission port to the receive port. - View Dependent Claims (19, 20)
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Specification