Abstract: A method for making iridium oxide nanoparticles includes dissolving an iridium salt to obtain a salt-containing solution, mixing a complexing agent with the salt-containing solution to obtain a blend solution, and adding an oxidating agent to the blend solution to obtain a product mixture. A molar ratio of a complexing compound of the complexing agent to the iridium salt is controlled in a predetermined range so as to permit the product mixture to include iridium oxide nanoparticles.

Abstract: An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.

Abstract: An antenna device includes a first antenna, a second antenna, a multiplexer, and a controller. The first antenna is arranged on a first plane with a plurality of first feeding ports on the body of the first antenna to transmit or receive an electromagnetic signal on a first frequency. The second antenna, which is arranged on a second plane, includes at least four second feeding ports to transmit or receive an electromagnetic signal on a second frequency. The multiplexer has an input port coupled to the signal source, and output ports coupled to the plurality of first feeding ports and the four second feeding ports. The controller controls the multiplexer to transmit a feeding signal from the signal source to at least one of the first feeding ports and at least one of the four second feeding ports, to fine-tune the beam of the antenna device.

Abstract: An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.

Abstract: An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.

Abstract: An antenna device includes a first antenna, a second antenna, a multiplexer, and a controller. The first antenna is arranged on a first plane with a plurality of first feeding ports on the body of the first antenna to transmit or receive an electromagnetic signal on a first frequency. The second antenna, which is arranged on a second plane, includes at least four second feeding ports to transmit or receive an electromagnetic signal on a second frequency. The multiplexer has an input port coupled to the signal source, and output ports coupled to the plurality of first feeding ports and the four second feeding ports. The controller controls the multiplexer to transmit a feeding signal from the signal source to at least one of the first feeding ports and at least one of the four second feeding ports, to fine-tune the beam of the antenna device.

Abstract: An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.