RF Phase Shifter
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorFabien Mesquita
Life of this patent
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Abstract
Embodiments of a Radio Frequency (RF) phase shifter are disclosed. In one embodiment, an RF phase shifter comprises a first transformer comprising a primary winding coupled to a first RF port of the RF phase shifter and a secondary winding that is magnetically coupled to the primary winding. The RF phase shifter further comprises at least one capacitor circuit having a first terminal coupled to the secondary winding of the first transformer and a second terminal coupled to a primary winding of a second transformer. The RF phase shifter and combiner further comprises the second transformer, where the primary winding of the secondary transformer is coupled to the second terminal of the at least one capacitor circuit, and a secondary winding of the second transformer is coupled to a second RF port of the RF phase shifter.
Claims18
A Radio Frequency, RF, phase shifter comprising:
- a first transformer comprising:
- a primary winding coupled to a first RF port of the RF phase shifter;
- and
- a secondary winding that is magnetically coupled to the primary winding;
- at least one capacitor circuit having:
- a first terminal coupled to the secondary winding of the first transformer;
- and
- a second terminal coupled to a primary winding of a second transformer;
- the second transformer comprising:
- the primary winding coupled to the second terminal of the at least one capacitor circuit;
- and
- a secondary winding coupled to a second RF port of the RF phase shifter;
- wherein the secondary winding of the first transformer comprises multiple taps;
- and
- the RF phase shifter further comprises switching circuitry that selectively couples at least one of the multiple taps to ground to thereby configure the secondary winding of the first transformer to have one of a plurality of inductance values.
A phased-array transceiver system comprising:
- a plurality of antennas and a plurality of transmit or receive branches;
- and
- a Radio Frequency, RF, phase shifter comprising:
- a first transformer comprising:
- a primary winding coupled to a first RF port of the RF phase shifter;
- and
- a secondary winding that is magnetically coupled to the primary winding;
- at least one capacitor circuit having:
- a first terminal coupled to the secondary winding of the first transformer;
- and
- a second terminal coupled to a primary winding of a second transformer;
- and
- the second transformer comprising:
- the primary winding coupled to the second terminal of the at least one capacitor circuit;
- and
- a secondary winding coupled to a second RF port of the RF phase shifter;
- wherein the secondary winding of the first transformer comprises multiple taps;
- and
- the RF phase shifter further comprises switching circuitry that selectively couples at least one of the multiple taps to ground to thereby configure the secondary winding of the first transformer to have one of a plurality of inductance values.
A wireless communication device comprising a phased-array transceiver system, the phase array transceiver system comprising:
- a plurality of antennas and a plurality of transmit or receive branches;
- and
- a Radio Frequency, RF, phase shifter comprising:
- a first transformer comprising:
- a primary winding coupled to a first RF port of the RF phase shifter;
- and
- a secondary winding that is magnetically coupled to the primary winding;
- at least one capacitor circuit having:
- a first terminal coupled to the secondary winding of the first transformer;
- and
- a second terminal coupled to a primary winding of a second transformer;
- and
- the second transformer comprising:
- the primary winding coupled to the second terminal of the at least one capacitor circuit;
- and
- a secondary winding coupled to a second RF port of the RF phase shifter;
- wherein the secondary winding of the first transformer comprises multiple taps;
- and
- the RF phase shifter further comprises switching circuitry that selectively couples at least one of the multiple taps to ground to thereby configure the secondary winding of the first transformer to have one of a plurality of inductance values.
A base station for a radio access network comprising a phased-array transceiver system, the phase array transceiver system comprising:
- a plurality of antennas and a plurality of transmit or receive branches;
- and
- a Radio Frequency, RF, phase shifter comprising:
- a first transformer comprising:
- a primary winding coupled to a first RF port of the RF phase shifter;
- and
- a secondary winding that is magnetically coupled to the primary winding;
- at least one capacitor circuit having:
- a first terminal coupled to the secondary winding of the first transformer;
- and
- a second terminal coupled to a primary winding of a second transformer;
- and
- the second transformer comprising:
- the primary winding coupled to the second terminal of the at least one capacitor circuit;
- and
- a secondary winding coupled to a second RF port of the RF phase shifter;
- and
- wherein the secondary winding of the first transformer comprises multiple taps;
- and
- the RF phase shifter further comprises switching circuitry that selectively couples at least one of the multiple taps to ground to thereby configure the secondary winding of the first transformer to have one of a plurality of inductance values.
Dependencies are inferred from the claim text.