Phase modulated antenna array
A phased modulated antenna array includes a plurality of antenna units and a circuit. At least one of the antenna units includes a first electrode and a second electrode overlapping the first electrode. The circuit is electrically connected to the second electrode and provides an electrical signal to the second electrode. The second electrode receives a first electrical signal directly and a second electrical signal indirectly.
1 . An electronic device, comprising:
a plurality of antenna units, wherein at least one of the plurality of antenna units comprises a first electrode and a second electrode overlapping the first electrode; and
a circuit electrically connected to the second electrode and providing an electrical signal to the second electrode,
wherein the second electrode receives a first electrical signal directly and a second electrical signal indirectly;
wherein the second electrode is a phase modulation electrode.
2 . The electronic device as claimed in claim 1 , wherein the first electrical signal and the second electrical signal are AC signals.
3 . The electronic device as claimed in claim 1 , wherein the at least one of the plurality of antenna units further comprises a third electrode overlapping the first electrode, the first electrode comprises a feeding area, and the third electrode overlaps the feeding area in a normal direction of a substrate.
4 . The electronic device as claimed in claim 1 , further comprises a wire adjacent to the second electrode and disposed on a substrate, the first electrode comprises a hole, and the hole overlaps the wire in a normal direction of the substrate.
5 . The electronic device as claimed in claim 1 , wherein the circuit comprises a first circuit unit and a second circuit unit.
6 . The electronic device as claimed in claim 1 , wherein the second electrical signal is provided to the second electrode indirectly by electromagnetic coupling.
7 . The electronic device as claimed in claim 1 , wherein a frequency of the first electrical signal is less than a frequency of the second electrical signal.
8 . The electronic device as claimed in claim 1 , wherein the first electrical signal has a positive voltage part and a negative voltage part with respect to a voltage level of the first electrode.
9 . The electronic device as claimed in claim 8 , wherein the first electrical signal is a periodic wave, and a time-amplitude integral of the positive voltage part in a duty cycle is 80% to 125% of a time-amplitude integral of the negative voltage part in the duty cycle.