PHASED ARRAY TRANSMISSION DEVICE
First Claim
1. A phased array transmission device, comprising:
- a first transmission branch and a second transmission branch, each having;
a transmitter which transmits a transmission signal at a radio frequency;
a phase adjuster which adjusts a phase of the transmission signal;
an amplitude adjuster which adjusts an amplitude of the transmission signal; and
a transmission output detector which extracts a part of an output of the transmitter;
an inter-branch error detector including;
a signal combiner which combines outputs of the transmission output detectors of the first transmission branch and the second transmission branch, with each other;
a detector which detects a level of an output of the signal combiner; and
an AD converter which converts an analog voltage from the detector into a digital value;
a correction controller which detects phases and amplitudes of the first transmission branch and the second transmission branch according to an output from the inter-branch error detector;
a phase controller which controls the phase adjuster based on a result of phase detection by the correction controller; and
an amplitude controller which controls the amplitude adjuster based on a result of amplitude detection by the correction controller.
3 Assignments
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Accused Products
Abstract
Transmission output detectors extract transmission outputs of a plurality of transmission branches, and an inter-branch error detector detects a combined signal level of the transmission outputs of the transmission branches to obtain an error detection signal. A correction controller calculates an amplitude error between the transmission branches based on an error detection signal, and calculates a phase error between the transmission branches based on an error detection signal which is obtained by changing the phases of the transmission branches. A phase controller and an amplitude controller correct the amplitude error and the phase error.
19 Citations
8 Claims
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1. A phased array transmission device, comprising:
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a first transmission branch and a second transmission branch, each having; a transmitter which transmits a transmission signal at a radio frequency; a phase adjuster which adjusts a phase of the transmission signal; an amplitude adjuster which adjusts an amplitude of the transmission signal; and a transmission output detector which extracts a part of an output of the transmitter; an inter-branch error detector including; a signal combiner which combines outputs of the transmission output detectors of the first transmission branch and the second transmission branch, with each other; a detector which detects a level of an output of the signal combiner; and an AD converter which converts an analog voltage from the detector into a digital value; a correction controller which detects phases and amplitudes of the first transmission branch and the second transmission branch according to an output from the inter-branch error detector; a phase controller which controls the phase adjuster based on a result of phase detection by the correction controller; and an amplitude controller which controls the amplitude adjuster based on a result of amplitude detection by the correction controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification