Patent ID: 11929723
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An antenna device comprising:
a plurality of phase-variable frequency multipliers to shift a phase of an input signal; and
a phased array antenna including a plurality of antenna elements to transmit respective input signals with phases shifted by the respective phase-variable frequency multipliers, wherein,
the phase-variable frequency multipliers each includes:
a 90-degree divider to divide the input signal into an in-phase signal and a quadrature signal;
an amplitude setting circuit to distribute each of the in-phase signal and the quadrature signal to two paths, setting amplitudes of one or more of four signals including the two distributed in-phase signals and the two distributed quadrature signals depending on a phase shift amount of the input signal, and outputting, as set signals, the four signals including one or more signals with the set amplitudes;
a first mixer to multiply a first in-phase signal of the two in-phase signals included in the set signals by a first quadrature signal of the two quadrature signals included in the set signals to generate a first signal with a doubled frequency being twice a frequency of the input signal;
a second mixer to multiply a second in-phase signal of the two in-phase signals included in the set signals by a second quadrature signal of the two quadrature signals included in the set signals to generate a second signal with an amplitude ratio with respect to the first signal, being a tangent of, or a reciprocal of a tangent of, the phase shift amount and with the doubled frequency; and
a 90-degree combiner to apply a phase difference of 90 degrees between the first signal and the second signal, and combining the first signal having the phase difference of 90 degrees from the second signal with the second signal.