Abstract: A dual-band circularly polarized antenna structure includes a microstrip line, an antenna unit and a ground. The antenna unit includes a first radiator and a second radiator. The first radiator has a feed-in portion and a first spiral pattern. The first spiral pattern spirals outwardly from a starting point close to the feed-in portion. The second radiator has a first grounding portion and a second spiral pattern. The second spiral pattern spirals outwardly from a starting point close to the first grounding portion in a manner non-overlapping with the first spiral pattern. One of the first and the second radiators has a second grounding portion. The microstrip line and the antenna unit are arranged apart. The feed-in portion of the first radiator of the antenna unit is coupled to the microstrip line. The first and the second grounding portions are coupled to the ground.

Abstract: The disclosure provides an electronic device including a carrier, a first antenna, a second antenna, a third antenna, and a shielding structure. The carrier includes a first side and a second side opposite to each other, and a third side and a fourth side opposite to each other. The first antenna is disposed at the first side of the carrier. The second antenna and the third antenna are disposed at the second side of the carrier. The first, second, and third antennas are used for transmitting and receiving wireless signals at first, second, and third frequency bands, respectively. The shielding structure is disposed between the first antenna and the second antenna, and between the first antenna and the third antenna, so that the shielding structure shields interference signals between the first antenna and the second antenna, and interference signals between the first antenna and the third antenna.

Abstract: A multi-band antenna includes a base portion, a high-frequency radiating portion, a feeding portion and a low-frequency radiating portion. The base portion has a first transverse edge and a second transverse edge parallel to and opposite to the first transverse edge. The high-frequency radiating portion includes an inductance portion, a first extending portion, a second extending portion and a third extending portion. One side of a bottom of the feeding portion defines a feeding point. The low-frequency radiating portion has a bending portion, a coupling portion and an auxiliary portion. The base portion, the high-frequency radiating portion, the coupling portion and the auxiliary portion are coplanar. The base portion, the high-frequency radiating portion, the coupling portion and the auxiliary portion together with the bending portion are located in two perpendicular planes.

Abstract: A multi-band antenna includes a base portion, a high-frequency radiating portion, a feeding portion and a low-frequency radiating portion. The base portion has a first transverse edge and a second transverse edge parallel to and opposite to the first transverse edge. The high-frequency radiating portion includes an inductance portion, a first extending portion, a second extending portion and a third extending portion. One side of a bottom of the feeding portion defines a feeding point. The low-frequency radiating portion has a bending portion, a coupling portion and an auxiliary portion. The base portion, the high-frequency radiating portion, the coupling portion and the auxiliary portion are coplanar. The base portion, the high-frequency radiating portion, the coupling portion and the auxiliary portion together with the bending portion are located in two perpendicular planes.