Phased array transmission device

摘要

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.

主权项

1. A phased array transmission device, comprising:
an N (N≧3) number of transmission branches including a first transmission branch and a second transmission branch, the second transmission branch being adjacent to the first 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; anda transmission output detector which extracts a part of an output of the transmitter; an (N−1) number of inter-branch error detectors, which detect relative errors between adjacent transmission branches, each including:
a signal combiner which combines outputs of the transmission output detectors of the adjacent transmission branches with each other;a detector which detects a level of an output of the signal combiner; andan AD converter which converts an analog voltage from the detector into a digital value; a correction controller which detects phases and amplitudes of the transmission branches according to outputs from the inter-branch error detectors; 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.