Abstract: An antenna structure includes an antenna pattern, a ground layer and two microstrip lines. The antenna pattern includes a first portion and a second portion. The first portion is rectangle shape and includes a first, a second, a third and a fourth sides. The second portion protrudes outwardly from the first side and the second side. The ground layer has two slots. Projections of the two slots to the antenna pattern are close to the third and the fourth sides. Projections of the two microstrip lines to the antenna pattern are perpendicular to the third and the fourth sides. Each microstrip line has a first section and a second section. Projection of the second section to the antenna pattern is closer to a center of the first portion than projection of the first section. A width of the first section is greater than a width of the second section.

Abstract: A dual-band antenna module includes a substrate, a dual-band omnidirectional antenna, a low-frequency reflection module and a high-frequency reflection module. The dual-band omnidirectional antenna is disposed perpendicular to the substrate and is used for resonating to generate a first radio-frequency signal with a first frequency and a second radio-frequency signal with a second frequency. The low-frequency reflection module includes three low-frequency reflection units used for reflecting the first radio-frequency signal with the first frequency according to different low-frequency directional control signals. The high-frequency reflection module includes three high-frequency reflection units used for reflecting the second radio-frequency signal with the second frequency according to different high-frequency directional control signals.

Abstract: An antenna structure includes an antenna pattern, a ground layer and two microstrip lines. The antenna pattern includes a first portion and a second portion. The first portion is rectangle shape and includes a first, a second, a third and a fourth sides. The second portion protrudes outwardly from the first side and the second side. The ground layer has two slots. Projections of the two slots to the antenna pattern are close to the third and the fourth sides. Projections of the two microstrip lines to the antenna pattern are perpendicular to the third and the fourth sides. Each microstrip line has a first section and a second section. Projection of the second section to the antenna pattern is closer to a center of the first portion than projection of the first section. A width of the first section is greater than a width of the second section.

Abstract: A dual-band antenna module includes a substrate, a dual-band omnidirectional antenna, a low-frequency reflection module and a high-frequency reflection module. The dual-band omnidirectional antenna is disposed perpendicular to the substrate and is used for resonating to generate a first radio-frequency signal with a first frequency and a second radio-frequency signal with a second frequency. The low-frequency reflection module includes three low-frequency reflection units used for reflecting the first radio-frequency signal with the first frequency according to different low-frequency directional control signals. The high-frequency reflection module includes three high-frequency reflection units used for reflecting the second radio-frequency signal with the second frequency according to different high-frequency directional control signals.

Abstract: An antenna structure includes a dipole antenna element, a meandering connection line, and a cascade radiation element. The dipole antenna element includes a feeding radiation element and a grounding radiation element. The feeding radiation element has at least one open slot. The cascade radiation element is coupled through the meandering connection line to the feeding radiation element.

Abstract: An unsymmetrical dipole antenna includes a grounding element, a radiating element, and a feed-in wire. The grounding element includes a first short side metal plane and a first long side metal plane. The radiating element includes a second short side metal plane and a second long side metal plane. The feed-in wire includes a metal wire, coupled to the second short side metal plane for transmitting a feed-in signal; an insulation layer, covering the metal wire; a metal weave, covering the insulation layer, having one terminal coupled to the first short side metal plane of the grounding element, and another terminal coupled to a system ground of the wireless communication device; and a protective layer, covering the metal weave. A size of the grounding element and a size of the radiating element are irrelative.

Abstract: An antenna structure includes a dipole antenna element, a meandering connection line, and a cascade radiation element. The dipole antenna element includes a feeding radiation element and a grounding radiation element. The feeding radiation element has at least one open slot. The cascade radiation element is coupled through the meandering connection line to the feeding radiation element.

Abstract: An unsymmetrical dipole antenna includes a grounding element, a radiating element, and a feed-in wire. The grounding element includes a first short side metal plane and a first long side metal plane. The radiating element includes a second short side metal plane and a second long side metal plane. The feed-in wire includes a metal wire, coupled to the second short side metal plane for transmitting a feed-in signal; an insulation layer, covering the metal wire; a metal weave, covering the insulation layer, having one terminal coupled to the first short side metal plane of the grounding element, and another terminal coupled to a system ground of the wireless communication device; and a protective layer, covering the metal weave. A size of the grounding element and a size of the radiating element are irrelative.