Phase shifter circuit
First Claim
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1. A phase shifter circuit, comprising:
- a power divider comprising a plurality of first lumped capacitors and a plurality of first lumped inductors, and coupled to a signal input terminal for receiving an input signal and dividing the power of the input signal to a first output terminal and a second output terminal;
a first switched attenuator coupled to the first output terminal for attenuating the signal received from the first output terminal and outputting a first attenuated signal;
a second switched attenuator coupled to the second output terminal for attenuating the signal received from the second output terminal and outputting a second attenuated signal;
a hybrid coupler comprising a plurality of second lumped capacitors and a plurality of second lumped inductors, and coupled to the first switched attenuator and the second switched attenuator for distributing the power of the first attenuated signal and the second attenuated signal and outputting a first coupled signal and a second coupled signal, wherein there is a first phase difference between the first coupled signal and the second coupled signal;
a differential phase shifter comprising a plurality of third lumped capacitors and a plurality of third lumped inductors, and coupled to the hybrid coupler for receiving the first coupled signal and the second coupled signal and outputting a first phase shifted signal and a second phase shifted signal, wherein there are a second phase difference between the first coupled signal and the first phase shifted signal, a third phase difference between the second coupled signal and the second phase shifted signal, and a fourth phase difference between the second phase difference and the third phase difference;
a third switched attenuator attenuating the first phase shifted signal and outputting a third attenuated signal;
a fourth switched attenuator attenuating the second phase shifted signal and outputting a fourth attenuated signal; and
a power combiner comprising a plurality of fourth lumped capacitors and a plurality of fourth lumped inductors, and coupled to the third switched attenuator and the fourth switched attenuator for combining the third attenuated signal and the fourth attenuated signal into an output signal and outputting the output signal from an signal output terminal, wherein there is a fifth phase difference between the output signal and the input signal.
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Abstract
A full range phase shifter circuit includes a power divider, a hybrid coupler, a differential phase shifter, a power combiner and switched attenuators. The power divider, hybrid coupler, differential phase shifter and power combiner comprise lumped elements and can be integrated in semiconductor processes, decreasing the circuit size of the full range phase shifter.
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Citations
34 Claims
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1. A phase shifter circuit, comprising:
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a power divider comprising a plurality of first lumped capacitors and a plurality of first lumped inductors, and coupled to a signal input terminal for receiving an input signal and dividing the power of the input signal to a first output terminal and a second output terminal; a first switched attenuator coupled to the first output terminal for attenuating the signal received from the first output terminal and outputting a first attenuated signal; a second switched attenuator coupled to the second output terminal for attenuating the signal received from the second output terminal and outputting a second attenuated signal; a hybrid coupler comprising a plurality of second lumped capacitors and a plurality of second lumped inductors, and coupled to the first switched attenuator and the second switched attenuator for distributing the power of the first attenuated signal and the second attenuated signal and outputting a first coupled signal and a second coupled signal, wherein there is a first phase difference between the first coupled signal and the second coupled signal; a differential phase shifter comprising a plurality of third lumped capacitors and a plurality of third lumped inductors, and coupled to the hybrid coupler for receiving the first coupled signal and the second coupled signal and outputting a first phase shifted signal and a second phase shifted signal, wherein there are a second phase difference between the first coupled signal and the first phase shifted signal, a third phase difference between the second coupled signal and the second phase shifted signal, and a fourth phase difference between the second phase difference and the third phase difference; a third switched attenuator attenuating the first phase shifted signal and outputting a third attenuated signal; a fourth switched attenuator attenuating the second phase shifted signal and outputting a fourth attenuated signal; and a power combiner comprising a plurality of fourth lumped capacitors and a plurality of fourth lumped inductors, and coupled to the third switched attenuator and the fourth switched attenuator for combining the third attenuated signal and the fourth attenuated signal into an output signal and outputting the output signal from an signal output terminal, wherein there is a fifth phase difference between the output signal and the input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A phase shifter circuit comprising:
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a power divider coupled to an signal input terminal for receiving an input signal and dividing the power of the input signal to a first output terminal and a second output terminal; a first switched attenuator coupled to the first output terminal for attenuating the signal received from the first output terminal and outputting a first attenuated signal; a second switched attenuator coupled to the second output terminal for attenuating the signal received from the second output terminal and outputting a second attenuated signal; a hybrid coupler coupled to the first switched attenuator and the second switched attenuator for distributing the power of the first attenuated signal and the second attenuated signal and outputting a first coupled signal and a second coupled signal, wherein there is a first phase difference between the first coupled signal and the second coupled signal; a differential phase shifter coupled to the hybrid coupler for receiving the first coupled signal and the second coupled signal and outputting the first phase shifted signal and the second phase shifted signal, wherein there are a second phase difference between the first coupled signal and the first phase shifted signal, a third phase difference between the second coupled signal and the second phase shifted signal, and a fourth phase difference between the second phase difference and the third phase difference; a third switched attenuator attenuating the first phase shifted signal and outputting a third attenuated signal; a fourth switched attenuator attenuating the second phase shifted signal and outputting a fourth attenuated signal; and a power combiner coupled to the third switched attenuator and the fourth switched attenuator for combining the third attenuated signal and the fourth attenuated signal into a combined signal and outputting the combined signal from a third output terminal, wherein there is a fifth phase difference between the combined signal and the input signal; an active all-pass phase shifter coupled between the power combiner and a fourth output terminal, wherein the active all-pass phase shifter adjusts a phase of the output signal using a variable capacitor and amplifies the power of the output signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification