Balun signal splitter
AssigneeSkyworks Solutions, Inc.
InventorPhilip H Thompson
Life of this patent
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Abstract
A balun signal splitter for use in transceiver systems, such as wireless communications systems, including a wide-band balun with a secondary winding for signal splitting between two operating bands (e.g., high-band and low-band) or modes. An example of a balun signal splitter configured for dual-band or dual-mode operation or includes a balun having a primary winding and a secondary winding, the secondary winding having a first port and a second port, a first network coupled to the first port and configured to present a short circuit impedance at the first port at out-of-band frequencies or during out-of-mode operation, and a second network coupled to the second port and configured to present a short circuit impedance at the second port at out-of-band frequencies or during out-of-mode operation.
Claims23
A balun signal splitter configured for high-band and low-band operation, the balun signal splitter comprising:
- a balun including a primary winding and a secondary winding, each having a first port and a second port;
- a high-band network coupled to the first port of the secondary winding and configured to present a short circuit impedance at the first port of the secondary winding at low-band frequencies;
- and
- a low-band network coupled to the second port of the secondary winding and configured to present a short circuit impedance at the second port of the secondary winding at high-band frequencies.
An RF interface for a transceiver, the RF interface comprising:
- a balun signal splitter configured for high-band and low-band operation and including:
- a balun including a primary winding and a secondary winding, each having a first port and a second port;
- a high-band network coupled to the first port of the secondary winding and configured to present a short circuit impedance at the first port of the secondary winding at low-band frequencies;
- and
- a low-band network coupled to the second port of the secondary winding and configured to present a short circuit impedance at the second port of the secondary winding at high-band frequencies;
- a differential transceiver RF output terminal coupled to the primary winding of the balun;
- a first power amplifier input terminal;
- and
- a second power amplifier input terminal, the high-band network being coupled between the first port of the secondary winding and the first power amplifier input terminal, and the low-band network being coupled between the second port of the secondary winding and the second power amplifier input terminal.
A balun signal splitter configured for dual-mode operation, the balun signal splitter comprising:
- a balun including a primary winding and a secondary winding, each having a first port and a second port;
- a first network coupled to the first port of the secondary winding and configured to present a short circuit impedance at the first port of the secondary winding for a first mode of operation;
- and
- a second network coupled to the second port of the secondary winding and configured to present a short circuit impedance at the second port of the secondary winding for a second mode of operation.
An RF interface for a transceiver for a wireless communications system, the RF interface comprising:
- a differential transceiver output terminal;
- a balun including a primary winding having first and second primary ports coupled to the differential transceiver output terminal and a secondary winding having first and second secondary ports;
- first and second power amplifier input terminals;
- a first network electrically coupled between the first secondary port and the first power amplifier input terminal, the first network configured to present a short circuit out-of-band impedance at the first port for a first mode of operation;
- and
- a second network electrically coupled between the second secondary port and the second power amplifier input terminal, the second network configured to present a short circuit out-of-band impedance at the second port for a second mode of operation.
Dependencies are inferred from the claim text.