Abstract: An antenna apparatus comprises a planar monopole antenna device and an extending layer. The planar monopole antenna device includes an electromagnetic shielding box. The extending layer is composed of electric conducting material and extends outward from a feed point of the electromagnetic shielding box.

Abstract: A balanced patched inverse F antenna comprises a radiation conductor and a balun circuit. The radiation conductor includes a main body, a first branch and a second branch. The balun circuit includes an unbalanced port, a balanced port, and first, second, third and fourth components, with the first, second, third and fourth components being serially connected. A feeding input of the unbalanced port is connected to the second and third components, a grounding wire of the unbalanced port is connected to the first and fourth components, an inverting terminal of the balanced port is connected to the first and second components, a non-inverting terminal of the balanced port is connected to the third and fourth components, and the inverting and non-inverting terminals are respectively connected to the first and second branches.

Abstract: An antenna apparatus comprises a planar monopole antenna device and an extending layer. The planar monopole antenna device includes an electromagnetic shielding box. The extending layer is composed of electric conducting material and extends outward from a feed point of the electromagnetic shielding box.

Abstract: A balanced patched inverse F antenna comprises a radiation conductor and a balun circuit. The radiation conductor includes a main body, a first branch and a second branch. The balun circuit includes an unbalanced port, a balanced port, and first, second, third and fourth components, with the first, second, third and fourth components being serially connected. A feeding input of the unbalanced port is connected to the second and third components, a grounding wire of the unbalanced port is connected to the first and fourth components, an inverting terminal of the balanced port is connected to the first and second components, a non-inverting terminal of the balanced port is connected to the third and fourth components, and the inverting and non-inverting terminals are respectively connected to the first and second branches.

Abstract: A wideband and dual-band n-order monopole antenna comprises an antenna body, a 5 GHz band matching branch, a 5 GHz band first-order branch, a 5 GHz band second-order branch, a 2.4 GHz band branch and a 2.4 GHz band matching branch. The antenna body is shaped substantially like an inverted “L,” including a first side and a second side, wherein the first side is substantially perpendicular to the second side. The 5 GHz band matching branch extends from the first side. The 5 GHz band first-order branch extends from the first side and in parallel to the 5 GHz band matching branch. The 5 GHz band second-order branch extends from the second side and is perpendicular to the 5 GHz band first-order branch. The 2.4 GHz band branch is connected to the second side through an extending arm, the combination of the extending arm and the 2.4 GHz band branch being shaped substantially like an “L.” The 2.4 GHz band matching branch extends outward from the second side.