Phased array antenna module
A phased array antenna module includes an analog circuit portion that adjusts at least one of an intensity and a phase of a signal transmitted or received by each of a plurality of antenna elements, a digital control portion that controls the analog circuit portion, a strobe mechanism portion that is provided between the analog circuit portion and the digital control portion, latches a control signal output from the digital control portion when a strobe latch signal is input, and outputs the control signal to the analog circuit portion, a state determination portion that determines whether or not the control signal is in a fixed state, and a timing adjustment portion that outputs the strobe latch signal to the strobe mechanism portion when a ready signal is output from the state determination portion.
1 . A phased array antenna module comprising:
an analog circuit portion configured to adjust at least one of an intensity and a phase of a signal transmitted or received by each of a plurality of antenna elements;
a digital control portion configured to control the analog circuit portion;
a strobe mechanism portion that is provided between the analog circuit portion and the digital control portion, and configured to latch a control signal output from the digital control portion when an instruction signal indicating a strobe latch operation is input and to output the control signal to the analog circuit portion;
a state determination portion configured to determine whether or not the control signal is in a fixed state; and
a timing adjustment portion configured to output the instruction signal to the strobe mechanism portion when the instruction signal is input and a determination signal output from the state determination portion indicates that the control signal is in a fixed state.
2 . The phased array antenna module according to claim 1 , further comprising:
an interface portion configured to receive a control command transmitted from an outside, and to output the control command to the digital control portion, wherein
the state determination portion determines whether or not the control signal is in a fixed state, based on a state of the interface portion and a state of the digital control portion.
3 . The phased array antenna module according to claim 2 , wherein
the interface portion outputs a first busy signal indicating a busy state when the control command is received, and releases the first busy signal when a process of outputting the control command to the digital control portion is completed,
the digital control portion outputs a second busy signal indicating a busy state when the first busy signal output from the interface portion is input, and releases the second busy signal when the control signal is in a fixed state, and
the state determination portion determines that the control signal is in a fixed state, when both the first busy signal and the second busy signal are released.
4 . The phased array antenna module according to claim 1 , wherein
the timing adjustment portion includes a latch circuit that latches the instruction signal, and
outputs the instruction signal latched by the latch circuit to the strobe mechanism portion when the determination signal output from the state determination portion indicates that the control signal is in a fixed state.
5 . The phased array antenna module according to claim 4 , wherein
the timing adjustment portion outputs the instruction signal latched by the latch circuit to the strobe mechanism portion, and then clears the latch circuit.
6 . The phased array antenna module according to claim 2 , wherein
the timing adjustment portion includes a latch circuit that latches the instruction signal, and
outputs the instruction signal latched by the latch circuit to the strobe mechanism portion when the determination signal output from the state determination portion indicates that the control signal is in a fixed state.
7 . The phased array antenna module according to claim 3 , wherein
the timing adjustment portion includes a latch circuit that latches the instruction signal, and
outputs the instruction signal latched by the latch circuit to the strobe mechanism portion when the determination signal output from the state determination portion indicates that the control signal is in a fixed state.
8 . The phased array antenna module according to claim 6 , wherein
the timing adjustment portion outputs the instruction signal latched by the latch circuit to the strobe mechanism portion, and then clears the latch circuit.
9 . The phased array antenna module according to claim 7 , wherein
the timing adjustment portion outputs the instruction signal latched by the latch circuit to the strobe mechanism portion, and then clears the latch circuit.