Antenna apparatus provided with electromagnetic coupling adjuster and antenna element excited through multiple feeding points

摘要

An antenna apparatus includes a first feeding point and a second feeding point provided at respective positions on an antenna element. The antenna element is excited through the first and second feeding points simultaneously so as to operate as a first antenna portion and a second antenna portion simultaneously, the first antenna portion and the second antenna portion correspond to the first and second feeding points, respectively. The antenna element further includes, between the first and second feeding points, an electromagnetic coupling adjuster for making an amount of isolation between the first and second antenna portions.

主权项

1. An antenna apparatus comprising:
an antenna element, which is a single conductor plate; an excitation slit disposed in said antenna element; a first feeding point and a second feeding point disposed at first and second positions, respectively, on said antenna element, and being connected to a radio signal processor circuit through a first feed line and a second feed line, respectively, said second feeding point being disposed at said excitation slit; and a ground conductor plate spaced from said antenna element by a predetermined distance, wherein said antenna element is a planar antenna configured to be excited through said first feeding point, wherein said excitation slit is a slit antenna configured to be excited through said second feeding point, said excitation slit having an open end located at a side of said antenna element facing said ground conductor plate, wherein said planar antenna and said slit antenna are configured to be simultaneously excited through said first and second feeding points, respectively, and wherein said antenna element comprises an electromagnetic coupling adjuster disposed between said first and second feeding points, and being configured to generate an amount of isolation between said planar antenna and said slit antenna.